// Code generated by sqlc. DO NOT EDIT.
// versions:
//   sqlc v1.31.1
// source: channel.sql

package db

import (
	"context"

	"github.com/jackc/pgx/v5/pgtype"
)

const acquireChannelWSLease = `-- name: AcquireChannelWSLease :one
UPDATE channel_installation
SET ws_lease_token       = $1,
    ws_lease_expires_at  = $2,
    updated_at           = now()
WHERE id = $3
  AND status = 'active'
  AND (
        ws_lease_token IS NULL
        OR ws_lease_expires_at < now()
        OR ws_lease_token = $1
  )
RETURNING id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at
`

type AcquireChannelWSLeaseParams struct {
	NewToken     pgtype.Text        `json:"new_token"`
	NewExpiresAt pgtype.Timestamptz `json:"new_expires_at"`
	ID           pgtype.UUID        `json:"id"`
}

// Atomically claims the WebSocket lease. CAS predicate accepts when no
// holder exists, the holder expired, or the holder is us (renewal).
func (q *Queries) AcquireChannelWSLease(ctx context.Context, arg AcquireChannelWSLeaseParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, acquireChannelWSLease, arg.NewToken, arg.NewExpiresAt, arg.ID)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const advanceChannelChatContextGeneration = `-- name: AdvanceChannelChatContextGeneration :one
WITH closed AS (
    UPDATE channel_chat_context_generation AS generation
    SET history_end_message_id = $1
    WHERE generation.chat_session_id = $2
      AND generation.revision = $3
), advanced AS (
    UPDATE channel_chat_session_binding AS binding
    SET context_revision = binding.context_revision + 1,
        pending_fresh = TRUE
    WHERE binding.chat_session_id = $2
      AND binding.context_revision = $3
    RETURNING binding.id, binding.chat_session_id, binding.installation_id, binding.channel_type, binding.channel_chat_id, binding.chat_type, binding.last_message_id, binding.last_thread_id, binding.config, binding.created_at, binding.pending_fresh, binding.context_revision, binding.route_revision, binding.retired_at, binding.history_start_message_id, binding.history_end_message_id, binding.history_boundary_pending
), opened AS (
    INSERT INTO channel_chat_context_generation (
        chat_session_id, revision, history_start_message_id,
        history_boundary_pending, pending_fresh
    )
    SELECT chat_session_id, context_revision,
           CASE WHEN $4::boolean THEN $1 END,
           NOT $4::boolean,
           TRUE
    FROM advanced
    RETURNING chat_session_id, revision, history_start_message_id, history_end_message_id, history_boundary_pending, pending_fresh, initiator_user_id, created_at
)
SELECT chat_session_id, revision, history_start_message_id, history_end_message_id, history_boundary_pending, pending_fresh, initiator_user_id, created_at FROM opened
`

type AdvanceChannelChatContextGenerationParams struct {
	HistoryBoundaryMessageID pgtype.Text `json:"history_boundary_message_id"`
	ChatSessionID            pgtype.UUID `json:"chat_session_id"`
	CurrentRevision          int64       `json:"current_revision"`
	HasMessageBody           bool        `json:"has_message_body"`
}

type AdvanceChannelChatContextGenerationRow struct {
	ChatSessionID          pgtype.UUID        `json:"chat_session_id"`
	Revision               int64              `json:"revision"`
	HistoryStartMessageID  pgtype.Text        `json:"history_start_message_id"`
	HistoryEndMessageID    pgtype.Text        `json:"history_end_message_id"`
	HistoryBoundaryPending bool               `json:"history_boundary_pending"`
	PendingFresh           bool               `json:"pending_fresh"`
	InitiatorUserID        pgtype.UUID        `json:"initiator_user_id"`
	CreatedAt              pgtype.Timestamptz `json:"created_at"`
}

// Opens a new agent-visible context while retaining the same Multica Chat.
// The triggering platform message is the exclusive end of the old generation
// and, when it has a body, the inclusive start of the new one.
func (q *Queries) AdvanceChannelChatContextGeneration(ctx context.Context, arg AdvanceChannelChatContextGenerationParams) (AdvanceChannelChatContextGenerationRow, error) {
	row := q.db.QueryRow(ctx, advanceChannelChatContextGeneration,
		arg.HistoryBoundaryMessageID,
		arg.ChatSessionID,
		arg.CurrentRevision,
		arg.HasMessageBody,
	)
	var i AdvanceChannelChatContextGenerationRow
	err := row.Scan(
		&i.ChatSessionID,
		&i.Revision,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
		&i.PendingFresh,
		&i.InitiatorUserID,
		&i.CreatedAt,
	)
	return i, err
}

const backfillChannelInstallationRegionToFeishuLark = `-- name: BackfillChannelInstallationRegionToFeishuLark :execrows
UPDATE channel_installation
SET config     = jsonb_set(config, '{region}', '"lark"'),
    updated_at = now()
WHERE channel_type = 'feishu'
  AND config ->> 'region' = 'feishu'
`

// Operator repair, feishu-only: flip every feishu installation still
// carrying region='feishu' to 'lark'. Called only on deployments whose
// legacy global base-URL override pointed at Lark international. Idempotent.
func (q *Queries) BackfillChannelInstallationRegionToFeishuLark(ctx context.Context) (int64, error) {
	result, err := q.db.Exec(ctx, backfillChannelInstallationRegionToFeishuLark)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const channelMediaObjectIsReferenced = `-- name: ChannelMediaObjectIsReferenced :one
SELECT EXISTS (
    SELECT 1 FROM attachment
    WHERE chat_message_id = $1
      AND workspace_id = $2
      AND url = $3
) AS referenced
`

type ChannelMediaObjectIsReferencedParams struct {
	ChatMessageID pgtype.UUID `json:"chat_message_id"`
	WorkspaceID   pgtype.UUID `json:"workspace_id"`
	StorageUrl    string      `json:"storage_url"`
}

// The post-claim reference check: an attachment row carrying this object's
// URL on the intended message. Only meaningful AFTER the claim flipped the
// row to 'deleting' — from that point a bind can no longer succeed on the
// key, so a negative answer is terminal, not a snapshot race. Re-run on every
// tombstone pass as well: a positive answer there is an invariant violation,
// and the object is kept and reported rather than deleted.
func (q *Queries) ChannelMediaObjectIsReferenced(ctx context.Context, arg ChannelMediaObjectIsReferencedParams) (bool, error) {
	row := q.db.QueryRow(ctx, channelMediaObjectIsReferenced, arg.ChatMessageID, arg.WorkspaceID, arg.StorageUrl)
	var referenced bool
	err := row.Scan(&referenced)
	return referenced, err
}

const claimChannelInboundDedup = `-- name: ClaimChannelInboundDedup :one

INSERT INTO channel_inbound_message_dedup (installation_id, message_id, claim_token)
VALUES ($1, $2, gen_random_uuid())
ON CONFLICT (installation_id, message_id) DO UPDATE
    SET received_at = now(),
        claim_token = gen_random_uuid()
    WHERE channel_inbound_message_dedup.processed_at IS NULL
      AND channel_inbound_message_dedup.received_at < now() - INTERVAL '60 seconds'
RETURNING installation_id, message_id, received_at, processed_at, claim_token
`

type ClaimChannelInboundDedupParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	MessageID      string      `json:"message_id"`
}

// =====================
// channel_inbound_message_dedup
// =====================
// Two-phase idempotency gate with owner fencing. Returns the row when a
// claim is acquired (fresh insert, or stale-reclaim of an in-flight claim
// older than 60s); returns no rows when terminal (processed) or actively
// in-flight. Every claim mints a fresh claim_token; Mark/Release are
// fenced on it. See the table comment in migration 124 / the lark
// predecessor for the full invariant set.
func (q *Queries) ClaimChannelInboundDedup(ctx context.Context, arg ClaimChannelInboundDedupParams) (ChannelInboundMessageDedup, error) {
	row := q.db.QueryRow(ctx, claimChannelInboundDedup, arg.InstallationID, arg.MessageID)
	var i ChannelInboundMessageDedup
	err := row.Scan(
		&i.InstallationID,
		&i.MessageID,
		&i.ReceivedAt,
		&i.ProcessedAt,
		&i.ClaimToken,
	)
	return i, err
}

const claimChannelMediaPendingObjectsForBind = `-- name: ClaimChannelMediaPendingObjectsForBind :many
DELETE FROM channel_media_pending_object
WHERE storage_key = ANY($1::text[])
  AND workspace_id = $2
  AND state = 'pending'
RETURNING storage_key
`

type ClaimChannelMediaPendingObjectsForBindParams struct {
	StorageKeys []string    `json:"storage_keys"`
	WorkspaceID pgtype.UUID `json:"workspace_id"`
}

// Runs inside the attachment-insert transaction: commit landed ⇔ the intents
// are gone, atomically, so an ambiguous COMMIT never needs adjudication. Only
// 'pending' rows can be claimed — a key the reconciler moved to 'deleting'
// is NOT returned, and the caller must skip attaching that object (the
// placeholder stays; the reconciler will delete the object).
func (q *Queries) ClaimChannelMediaPendingObjectsForBind(ctx context.Context, arg ClaimChannelMediaPendingObjectsForBindParams) ([]string, error) {
	rows, err := q.db.Query(ctx, claimChannelMediaPendingObjectsForBind, arg.StorageKeys, arg.WorkspaceID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []string{}
	for rows.Next() {
		var storage_key string
		if err := rows.Scan(&storage_key); err != nil {
			return nil, err
		}
		items = append(items, storage_key)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const claimNextChannelMediaPendingObjectForReconcile = `-- name: ClaimNextChannelMediaPendingObjectForReconcile :one
UPDATE channel_media_pending_object AS obj
SET state = CASE WHEN obj.state = 'tombstoned' THEN 'tombstoned' ELSE 'deleting' END,
    lease_token = $1,
    lease_expires_at = now() + $2::interval,
    attempt = obj.attempt + 1
FROM (
    SELECT cand.storage_key FROM channel_media_pending_object AS cand
    WHERE cand.next_attempt_at <= now()
      AND (
          (cand.state = 'pending' AND cand.created_at <= now() - $3::interval)
          OR (cand.state = 'deleting' AND (cand.lease_expires_at IS NULL OR cand.lease_expires_at <= now()))
          OR (cand.state = 'tombstoned' AND (cand.lease_expires_at IS NULL OR cand.lease_expires_at <= now()))
      )
    ORDER BY cand.next_attempt_at
    LIMIT 1
    FOR UPDATE SKIP LOCKED
) AS due
WHERE obj.storage_key = due.storage_key
RETURNING obj.storage_key, obj.workspace_id, obj.chat_message_id, obj.storage_url, obj.installation_id, obj.state, obj.lease_token, obj.lease_expires_at, obj.attempt, obj.next_attempt_at, obj.last_error, obj.tombstone_pass, obj.created_at
`

type ClaimNextChannelMediaPendingObjectForReconcileParams struct {
	LeaseToken  pgtype.UUID     `json:"lease_token"`
	Lease       pgtype.Interval `json:"lease"`
	SettleDelay pgtype.Interval `json:"settle_delay"`
}

// Short-transaction claim of ONE due row, taken immediately before that row is
// settled. Claiming a whole batch up front made the claim a promise the sweep
// might not keep: a tail row sat in 'deleting' with attempt already bumped
// while earlier rows ran, and could expire and be reclaimed before its own
// DELETE was ever tried, inflating attempt/backoff for work that never
// happened. One row per claim means attempt counts attempts.
//
// Due means (a) 'pending' rows older than the settle delay — an operational
// buffer only; correctness comes from the state flip, after which a bind can
// never succeed on the key — or (b) 'deleting' rows whose lease expired (a
// crashed or failed worker) — or (c) tombstones: the object was deleted, but a
// PUT the client abandoned may still materialize it afterwards, so each due
// tombstone gets another idempotent delete before the row is finally dropped.
// FOR UPDATE SKIP LOCKED keeps replicas off each other's row; the
// object-storage DELETE happens outside any transaction, gated by the lease
// token. No row (ErrNoRows) means nothing is due — the sweep is done.
func (q *Queries) ClaimNextChannelMediaPendingObjectForReconcile(ctx context.Context, arg ClaimNextChannelMediaPendingObjectForReconcileParams) (ChannelMediaPendingObject, error) {
	row := q.db.QueryRow(ctx, claimNextChannelMediaPendingObjectForReconcile, arg.LeaseToken, arg.Lease, arg.SettleDelay)
	var i ChannelMediaPendingObject
	err := row.Scan(
		&i.StorageKey,
		&i.WorkspaceID,
		&i.ChatMessageID,
		&i.StorageUrl,
		&i.InstallationID,
		&i.State,
		&i.LeaseToken,
		&i.LeaseExpiresAt,
		&i.Attempt,
		&i.NextAttemptAt,
		&i.LastError,
		&i.TombstonePass,
		&i.CreatedAt,
	)
	return i, err
}

const clearChannelChatContextPendingFresh = `-- name: ClearChannelChatContextPendingFresh :exec
UPDATE channel_chat_context_generation
SET pending_fresh = FALSE
WHERE chat_session_id = $1
  AND revision = $2
`

type ClearChannelChatContextPendingFreshParams struct {
	ChatSessionID pgtype.UUID `json:"chat_session_id"`
	Revision      int64       `json:"revision"`
}

func (q *Queries) ClearChannelChatContextPendingFresh(ctx context.Context, arg ClearChannelChatContextPendingFreshParams) error {
	_, err := q.db.Exec(ctx, clearChannelChatContextPendingFresh, arg.ChatSessionID, arg.Revision)
	return err
}

const clearChannelChatSessionPendingFresh = `-- name: ClearChannelChatSessionPendingFresh :exec
UPDATE channel_chat_session_binding
SET pending_fresh = FALSE
WHERE chat_session_id = $1
`

func (q *Queries) ClearChannelChatSessionPendingFresh(ctx context.Context, chatSessionID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, clearChannelChatSessionPendingFresh, chatSessionID)
	return err
}

const clearChannelChatSessionPendingFreshForRevision = `-- name: ClearChannelChatSessionPendingFreshForRevision :exec
UPDATE channel_chat_session_binding
SET pending_fresh = FALSE
WHERE chat_session_id = $1
  AND context_revision = $2
`

type ClearChannelChatSessionPendingFreshForRevisionParams struct {
	ChatSessionID pgtype.UUID `json:"chat_session_id"`
	Revision      int64       `json:"revision"`
}

func (q *Queries) ClearChannelChatSessionPendingFreshForRevision(ctx context.Context, arg ClearChannelChatSessionPendingFreshForRevisionParams) error {
	_, err := q.db.Exec(ctx, clearChannelChatSessionPendingFreshForRevision, arg.ChatSessionID, arg.Revision)
	return err
}

const consumeChannelBindingToken = `-- name: ConsumeChannelBindingToken :one
UPDATE channel_binding_token
SET consumed_at = now()
WHERE token_hash = $1
  AND consumed_at IS NULL
  AND expires_at > now()
RETURNING token_hash, workspace_id, installation_id, channel_type, channel_user_id, expires_at, consumed_at, created_at
`

// Atomic redemption: returns the row only if the hash exists, is
// unconsumed, and unexpired. Two simultaneous redemptions cannot both win.
func (q *Queries) ConsumeChannelBindingToken(ctx context.Context, tokenHash string) (ChannelBindingToken, error) {
	row := q.db.QueryRow(ctx, consumeChannelBindingToken, tokenHash)
	var i ChannelBindingToken
	err := row.Scan(
		&i.TokenHash,
		&i.WorkspaceID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.ExpiresAt,
		&i.ConsumedAt,
		&i.CreatedAt,
	)
	return i, err
}

const copyChannelTaskDelivery = `-- name: CopyChannelTaskDelivery :exec
INSERT INTO channel_task_delivery (
    task_id, binding_id, installation_id, channel_type, channel_chat_id, chat_type,
    channel_message_id, channel_thread_id, route_revision, config
)
SELECT
    $1, delivery.binding_id, delivery.installation_id, delivery.channel_type, delivery.channel_chat_id, delivery.chat_type,
    delivery.channel_message_id, delivery.channel_thread_id, delivery.route_revision, delivery.config
FROM channel_task_delivery AS delivery
WHERE delivery.task_id = $2
`

type CopyChannelTaskDeliveryParams struct {
	ChildTaskID  pgtype.UUID `json:"child_task_id"`
	ParentTaskID pgtype.UUID `json:"parent_task_id"`
}

func (q *Queries) CopyChannelTaskDelivery(ctx context.Context, arg CopyChannelTaskDeliveryParams) error {
	_, err := q.db.Exec(ctx, copyChannelTaskDelivery, arg.ChildTaskID, arg.ParentTaskID)
	return err
}

const createChannelBindingToken = `-- name: CreateChannelBindingToken :one

INSERT INTO channel_binding_token (
    token_hash, workspace_id, installation_id, channel_type,
    channel_user_id, expires_at
) VALUES (
    $1, $2, $3, $4, $5,
    LEAST($6::timestamptz, now() + INTERVAL '15 minutes')
)
RETURNING token_hash, workspace_id, installation_id, channel_type, channel_user_id, expires_at, consumed_at, created_at
`

type CreateChannelBindingTokenParams struct {
	TokenHash      string             `json:"token_hash"`
	WorkspaceID    pgtype.UUID        `json:"workspace_id"`
	InstallationID pgtype.UUID        `json:"installation_id"`
	ChannelType    string             `json:"channel_type"`
	ChannelUserID  string             `json:"channel_user_id"`
	ExpiresAt      pgtype.Timestamptz `json:"expires_at"`
}

// =====================
// channel_binding_token
// =====================
// Mints a single-use binding token for an unbound platform user. TTL cap
// (15 min) enforced by the table CHECK in lockstep with
// channel.BindingTokenTTL. Clamp against the database clock so small clock
// skew between an app node and Postgres cannot reject an otherwise valid
// 15-minute token. The HASH is stored, never the raw token.
func (q *Queries) CreateChannelBindingToken(ctx context.Context, arg CreateChannelBindingTokenParams) (ChannelBindingToken, error) {
	row := q.db.QueryRow(ctx, createChannelBindingToken,
		arg.TokenHash,
		arg.WorkspaceID,
		arg.InstallationID,
		arg.ChannelType,
		arg.ChannelUserID,
		arg.ExpiresAt,
	)
	var i ChannelBindingToken
	err := row.Scan(
		&i.TokenHash,
		&i.WorkspaceID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.ExpiresAt,
		&i.ConsumedAt,
		&i.CreatedAt,
	)
	return i, err
}

const createChannelChatSessionBinding = `-- name: CreateChannelChatSessionBinding :one

WITH next_route AS (
    SELECT COALESCE(MAX(route_revision) + 1, 1)::bigint AS route_revision
    FROM channel_chat_session_binding AS existing
    WHERE existing.installation_id = $2 AND existing.channel_chat_id = $4
), binding AS (
INSERT INTO channel_chat_session_binding (
    chat_session_id, installation_id, channel_type, channel_chat_id, chat_type,
    config, route_revision
)
SELECT $1, $2, $3, $4, $5, $6, next_route.route_revision
FROM next_route
RETURNING id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending
), generation AS (
    INSERT INTO channel_chat_context_generation (chat_session_id, revision)
    SELECT chat_session_id, context_revision FROM binding
)
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending FROM binding
`

type CreateChannelChatSessionBindingParams struct {
	ChatSessionID  pgtype.UUID `json:"chat_session_id"`
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelType    string      `json:"channel_type"`
	ChannelChatID  string      `json:"channel_chat_id"`
	ChatType       string      `json:"chat_type"`
	Config         []byte      `json:"config"`
}

type CreateChannelChatSessionBindingRow struct {
	ID                     pgtype.UUID        `json:"id"`
	ChatSessionID          pgtype.UUID        `json:"chat_session_id"`
	InstallationID         pgtype.UUID        `json:"installation_id"`
	ChannelType            string             `json:"channel_type"`
	ChannelChatID          string             `json:"channel_chat_id"`
	ChatType               string             `json:"chat_type"`
	LastMessageID          pgtype.Text        `json:"last_message_id"`
	LastThreadID           pgtype.Text        `json:"last_thread_id"`
	Config                 []byte             `json:"config"`
	CreatedAt              pgtype.Timestamptz `json:"created_at"`
	PendingFresh           bool               `json:"pending_fresh"`
	ContextRevision        int64              `json:"context_revision"`
	RouteRevision          int64              `json:"route_revision"`
	RetiredAt              pgtype.Timestamptz `json:"retired_at"`
	HistoryStartMessageID  pgtype.Text        `json:"history_start_message_id"`
	HistoryEndMessageID    pgtype.Text        `json:"history_end_message_id"`
	HistoryBoundaryPending bool               `json:"history_boundary_pending"`
}

// =====================
// channel_chat_session_binding
// =====================
// channel_chat_id is the session-isolation key (one chat_session per
// (installation_id, channel_chat_id)): Feishu passes the chat id; Slack passes
// a stable key that, for channels, includes the thread root so each @bot thread
// is its own session. config carries any platform-specific outbound routing the
// key alone does not (e.g. Slack's real channel_id when the key is composite);
// it is opaque to the shared session service.
func (q *Queries) CreateChannelChatSessionBinding(ctx context.Context, arg CreateChannelChatSessionBindingParams) (CreateChannelChatSessionBindingRow, error) {
	row := q.db.QueryRow(ctx, createChannelChatSessionBinding,
		arg.ChatSessionID,
		arg.InstallationID,
		arg.ChannelType,
		arg.ChannelChatID,
		arg.ChatType,
		arg.Config,
	)
	var i CreateChannelChatSessionBindingRow
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
		&i.PendingFresh,
		&i.ContextRevision,
		&i.RouteRevision,
		&i.RetiredAt,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
	)
	return i, err
}

const createChannelChatSessionBindingGeneration = `-- name: CreateChannelChatSessionBindingGeneration :one
WITH next_route AS (
    SELECT GREATEST(
        $1::bigint,
        COALESCE(MAX(route_revision) + 1, 1)::bigint
    ) AS route_revision
    FROM channel_chat_session_binding AS existing
    WHERE existing.installation_id = $2
      AND existing.channel_chat_id = $3
), binding AS (
INSERT INTO channel_chat_session_binding (
    chat_session_id, installation_id, channel_type, channel_chat_id, chat_type,
    config, route_revision, history_start_message_id, history_boundary_pending
) SELECT
    $4, $2, $5, $3, $6,
    $7, next_route.route_revision, $8, $9
FROM next_route
RETURNING id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending
), generation AS (
    INSERT INTO channel_chat_context_generation (
        chat_session_id, revision, history_start_message_id, history_boundary_pending
    )
    SELECT chat_session_id, context_revision, history_start_message_id, history_boundary_pending
    FROM binding
)
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending FROM binding
`

type CreateChannelChatSessionBindingGenerationParams struct {
	RouteRevision          int64       `json:"route_revision"`
	InstallationID         pgtype.UUID `json:"installation_id"`
	ChannelChatID          string      `json:"channel_chat_id"`
	ChatSessionID          pgtype.UUID `json:"chat_session_id"`
	ChannelType            string      `json:"channel_type"`
	ChatType               string      `json:"chat_type"`
	Config                 []byte      `json:"config"`
	HistoryStartMessageID  pgtype.Text `json:"history_start_message_id"`
	HistoryBoundaryPending bool        `json:"history_boundary_pending"`
}

type CreateChannelChatSessionBindingGenerationRow struct {
	ID                     pgtype.UUID        `json:"id"`
	ChatSessionID          pgtype.UUID        `json:"chat_session_id"`
	InstallationID         pgtype.UUID        `json:"installation_id"`
	ChannelType            string             `json:"channel_type"`
	ChannelChatID          string             `json:"channel_chat_id"`
	ChatType               string             `json:"chat_type"`
	LastMessageID          pgtype.Text        `json:"last_message_id"`
	LastThreadID           pgtype.Text        `json:"last_thread_id"`
	Config                 []byte             `json:"config"`
	CreatedAt              pgtype.Timestamptz `json:"created_at"`
	PendingFresh           bool               `json:"pending_fresh"`
	ContextRevision        int64              `json:"context_revision"`
	RouteRevision          int64              `json:"route_revision"`
	RetiredAt              pgtype.Timestamptz `json:"retired_at"`
	HistoryStartMessageID  pgtype.Text        `json:"history_start_message_id"`
	HistoryEndMessageID    pgtype.Text        `json:"history_end_message_id"`
	HistoryBoundaryPending bool               `json:"history_boundary_pending"`
}

func (q *Queries) CreateChannelChatSessionBindingGeneration(ctx context.Context, arg CreateChannelChatSessionBindingGenerationParams) (CreateChannelChatSessionBindingGenerationRow, error) {
	row := q.db.QueryRow(ctx, createChannelChatSessionBindingGeneration,
		arg.RouteRevision,
		arg.InstallationID,
		arg.ChannelChatID,
		arg.ChatSessionID,
		arg.ChannelType,
		arg.ChatType,
		arg.Config,
		arg.HistoryStartMessageID,
		arg.HistoryBoundaryPending,
	)
	var i CreateChannelChatSessionBindingGenerationRow
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
		&i.PendingFresh,
		&i.ContextRevision,
		&i.RouteRevision,
		&i.RetiredAt,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
	)
	return i, err
}

const createChannelOutboundCardMessage = `-- name: CreateChannelOutboundCardMessage :one

INSERT INTO channel_outbound_card_message (
    chat_session_id, task_id, channel_type, channel_chat_id,
    channel_card_message_id, status
) VALUES (
    $1, $6, $2, $3, $4, $5
)
RETURNING id, chat_session_id, task_id, channel_type, channel_chat_id, channel_card_message_id, status, last_patched_at, created_at
`

type CreateChannelOutboundCardMessageParams struct {
	ChatSessionID        pgtype.UUID `json:"chat_session_id"`
	ChannelType          string      `json:"channel_type"`
	ChannelChatID        string      `json:"channel_chat_id"`
	ChannelCardMessageID string      `json:"channel_card_message_id"`
	Status               string      `json:"status"`
	TaskID               pgtype.UUID `json:"task_id"`
}

// =====================
// channel_outbound_card_message
// =====================
func (q *Queries) CreateChannelOutboundCardMessage(ctx context.Context, arg CreateChannelOutboundCardMessageParams) (ChannelOutboundCardMessage, error) {
	row := q.db.QueryRow(ctx, createChannelOutboundCardMessage,
		arg.ChatSessionID,
		arg.ChannelType,
		arg.ChannelChatID,
		arg.ChannelCardMessageID,
		arg.Status,
		arg.TaskID,
	)
	var i ChannelOutboundCardMessage
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.TaskID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChannelCardMessageID,
		&i.Status,
		&i.LastPatchedAt,
		&i.CreatedAt,
	)
	return i, err
}

const createChannelTaskDeliveryFromSession = `-- name: CreateChannelTaskDeliveryFromSession :one

INSERT INTO channel_task_delivery (
    task_id, binding_id, installation_id, channel_type, channel_chat_id, chat_type,
    channel_message_id, channel_thread_id, route_revision, config
)
SELECT
    $1, binding.id, binding.installation_id, binding.channel_type,
    binding.channel_chat_id, binding.chat_type, binding.last_message_id, binding.last_thread_id,
    binding.route_revision, binding.config
FROM channel_chat_session_binding AS binding
WHERE binding.chat_session_id = $2
RETURNING task_id, binding_id, installation_id, channel_type, channel_chat_id, chat_type, channel_message_id, channel_thread_id, route_revision, config, created_at
`

type CreateChannelTaskDeliveryFromSessionParams struct {
	TaskID        pgtype.UUID `json:"task_id"`
	ChatSessionID pgtype.UUID `json:"chat_session_id"`
}

// =====================
// channel_task_delivery
// =====================
func (q *Queries) CreateChannelTaskDeliveryFromSession(ctx context.Context, arg CreateChannelTaskDeliveryFromSessionParams) (ChannelTaskDelivery, error) {
	row := q.db.QueryRow(ctx, createChannelTaskDeliveryFromSession, arg.TaskID, arg.ChatSessionID)
	var i ChannelTaskDelivery
	err := row.Scan(
		&i.TaskID,
		&i.BindingID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.ChannelMessageID,
		&i.ChannelThreadID,
		&i.RouteRevision,
		&i.Config,
		&i.CreatedAt,
	)
	return i, err
}

const createChannelUserBinding = `-- name: CreateChannelUserBinding :one

INSERT INTO channel_user_binding (
    workspace_id, multica_user_id, installation_id,
    channel_type, channel_user_id, config
) VALUES (
    $1, $2, $3, $4, $5, $6
)
ON CONFLICT (installation_id, channel_user_id) DO UPDATE SET
    -- jsonb_strip_nulls(EXCLUDED.config) preserves the old lark semantics
    -- ` + "`" + `union_id = COALESCE(EXCLUDED.union_id, lark_user_binding.union_id)` + "`" + `:
    -- a re-bind that carries ` + "`" + `{"union_id": null}` + "`" + ` (or omits the key) must NOT
    -- erase a union_id we already captured. Only non-null incoming keys win.
    config   = channel_user_binding.config || jsonb_strip_nulls(EXCLUDED.config),
    bound_at = now()
WHERE channel_user_binding.multica_user_id = EXCLUDED.multica_user_id
RETURNING id, workspace_id, multica_user_id, installation_id, channel_type, channel_user_id, config, bound_at
`

type CreateChannelUserBindingParams struct {
	WorkspaceID    pgtype.UUID `json:"workspace_id"`
	MulticaUserID  pgtype.UUID `json:"multica_user_id"`
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelType    string      `json:"channel_type"`
	ChannelUserID  string      `json:"channel_user_id"`
	Config         []byte      `json:"config"`
}

// =====================
// channel_user_binding
// =====================
// Records that a platform user id (per-installation; Feishu open_id) maps
// to a Multica user. The old composite member-FK is gone, so this no
// longer fails when the redeemer is not a workspace member — the caller
// (BindingTokenService.RedeemAndBind) validates membership explicitly
// before calling. ON CONFLICT DO UPDATE is still gated on multica_user_id
// matching, so a second redeemer cannot steal an already-bound user id;
// a cross-user conflict updates zero rows and the caller maps that to
// ErrBindingAlreadyAssigned. config carries secondary identity (union_id).
func (q *Queries) CreateChannelUserBinding(ctx context.Context, arg CreateChannelUserBindingParams) (ChannelUserBinding, error) {
	row := q.db.QueryRow(ctx, createChannelUserBinding,
		arg.WorkspaceID,
		arg.MulticaUserID,
		arg.InstallationID,
		arg.ChannelType,
		arg.ChannelUserID,
		arg.Config,
	)
	var i ChannelUserBinding
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.MulticaUserID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.Config,
		&i.BoundAt,
	)
	return i, err
}

const deleteChannelBindingTokensByInstallation = `-- name: DeleteChannelBindingTokensByInstallation :exec
DELETE FROM channel_binding_token
WHERE installation_id = $1
`

// Application-layer integrity (schema has no FK/cascade, MUL-3515 §4): drop
// every pending binding token for an installation that is being hard-deleted.
// A token stays redeemable for up to 15 min; without this a user who clicks a
// still-unexpired bind link right after the bot was rebound to another agent
// would consume the token and get a "bound" result written against a deleted
// installation — a link that never actually reaches the live bot.
func (q *Queries) DeleteChannelBindingTokensByInstallation(ctx context.Context, installationID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteChannelBindingTokensByInstallation, installationID)
	return err
}

const deleteChannelChatSessionBindingBySession = `-- name: DeleteChannelChatSessionBindingBySession :exec
WITH target AS (
    SELECT binding.id FROM channel_chat_session_binding AS binding
    WHERE binding.chat_session_id = $1
), cleared_deliveries AS (
    DELETE FROM channel_task_delivery AS delivery WHERE delivery.binding_id IN (SELECT id FROM target)
), cleared_outbound AS (
    DELETE FROM channel_outbound_message AS outbound WHERE outbound.binding_id IN (SELECT id FROM target)
), deleted_binding AS (
    DELETE FROM channel_chat_session_binding AS binding WHERE binding.id IN (SELECT id FROM target)
)
DELETE FROM channel_chat_context_generation AS generation
WHERE generation.chat_session_id = $1
`

// Application-layer integrity (replaces the old chat_session-FK ON DELETE
// CASCADE): drop the binding, its immutable delivery/history dependents,
// and the Chat's context generations.
func (q *Queries) DeleteChannelChatSessionBindingBySession(ctx context.Context, chatSessionID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteChannelChatSessionBindingBySession, chatSessionID)
	return err
}

const deleteChannelChatSessionBindingsByInstallation = `-- name: DeleteChannelChatSessionBindingsByInstallation :exec
WITH cleared_deliveries AS (
    DELETE FROM channel_task_delivery AS delivery
    WHERE delivery.installation_id = $1
      AND delivery.channel_type = $2
), cleared_outbound AS (
    DELETE FROM channel_outbound_message AS outbound
    WHERE outbound.installation_id = $1
      AND outbound.channel_type = $2
)
DELETE FROM channel_chat_session_binding AS binding
WHERE binding.installation_id = $1
  AND binding.channel_type = $2
`

type DeleteChannelChatSessionBindingsByInstallationParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelType    string      `json:"channel_type"`
}

// Retire every chat-session binding for an installation. Used when an
// installation is re-pointed to a different agent (Slack re-connect): each
// existing chat_session is permanently tied to the agent it was created under,
// so reusing it would keep routing the conversation to the OLD agent. Dropping
// the bindings forces the next inbound message to create a fresh session under
// the new agent. The chat_session rows are preserved for history; only the
// channel binding is removed. Context generations belong to the preserved Chat,
// not to the retired binding: in-flight task history snapshots may still read
// them after this statement commits.
func (q *Queries) DeleteChannelChatSessionBindingsByInstallation(ctx context.Context, arg DeleteChannelChatSessionBindingsByInstallationParams) error {
	_, err := q.db.Exec(ctx, deleteChannelChatSessionBindingsByInstallation, arg.InstallationID, arg.ChannelType)
	return err
}

const deleteChannelInstallationsBySystemRuntimeAgents = `-- name: DeleteChannelInstallationsBySystemRuntimeAgents :exec
WITH system_agents AS (
    SELECT system_agent.id FROM agent AS system_agent
    WHERE system_agent.runtime_id = $1 AND system_agent.kind = 'system'
),
doomed_sessions AS (
    SELECT id FROM chat_session
    WHERE agent_id IN (SELECT id FROM system_agents)
),
doomed AS (
    SELECT id FROM channel_installation
    WHERE agent_id IN (SELECT id FROM system_agents)
),
cleared_dingtalk_group_presence AS (
    DELETE FROM dingtalk_group_presence WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_dingtalk_bot_identity AS (
    DELETE FROM dingtalk_bot_identity WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_dingtalk_group_routes AS (
    DELETE FROM dingtalk_group_route WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_task_deliveries AS (
    DELETE FROM channel_task_delivery WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_outbound_messages AS (
    DELETE FROM channel_outbound_message WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_chat_sessions AS (
    DELETE FROM channel_chat_session_binding WHERE installation_id IN (SELECT id FROM doomed)
    RETURNING chat_session_id
),
cleared_chat_contexts AS (
    DELETE FROM channel_chat_context_generation
    WHERE chat_session_id IN (SELECT chat_session_id FROM cleared_chat_sessions)
       OR chat_session_id IN (SELECT id FROM doomed_sessions)
),
cleared_outbound_cards AS (
    -- Reach channel_outbound_card_message (keyed by chat_session_id, no FK)
    -- through the just-removed chat-session bindings, same as the reclaim path.
    DELETE FROM channel_outbound_card_message
    WHERE chat_session_id IN (SELECT chat_session_id FROM cleared_chat_sessions)
),
cleared_binding_tokens AS (
    DELETE FROM channel_binding_token WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_user_bindings AS (
    DELETE FROM channel_user_binding WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_inbound_dedup AS (
    DELETE FROM channel_inbound_message_dedup WHERE installation_id IN (SELECT id FROM doomed)
),
cleared_audit AS (
    -- Hard delete: purge audit rows rather than detaching them into permanently
    -- unattributable NULL rows (channel_inbound_audit has no workspace_id / reaper).
    DELETE FROM channel_inbound_audit WHERE installation_id IN (SELECT id FROM doomed)
)
DELETE FROM channel_installation WHERE id IN (SELECT id FROM doomed)
`

// Application-layer replacement for the (deliberately absent, MUL-3515 §4)
// workspace/agent ON DELETE CASCADE: on runtime teardown, before the system
// agents are hard-deleted, remove every channel installation they own — plus all
// of each installation's dependent rows — so no orphaned installation keeps
// occupying its bot's (channel_type, app_id) routing slot after its agent is gone
// (#4810). MUST run in the same tx as, and BEFORE, DeleteSystemAgentsByRuntime.
// Mirrors the agent hard-delete predicate (runtime_id, kind = 'system') exactly.
//
// Scoped to kind = 'system' since MUL-5559: a user agent now survives its
// runtime's deletion as an unbound agent, so tearing down its installations
// here would take a working bot away from an agent that is still there.
func (q *Queries) DeleteChannelInstallationsBySystemRuntimeAgents(ctx context.Context, runtimeID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteChannelInstallationsBySystemRuntimeAgents, runtimeID)
	return err
}

const deleteChannelMediaPendingObject = `-- name: DeleteChannelMediaPendingObject :execrows
DELETE FROM channel_media_pending_object
WHERE storage_key = $1
  AND workspace_id = $2
  AND lease_token = $3
`

type DeleteChannelMediaPendingObjectParams struct {
	StorageKey  string      `json:"storage_key"`
	WorkspaceID pgtype.UUID `json:"workspace_id"`
	LeaseToken  pgtype.UUID `json:"lease_token"`
}

// Drops a claimed row for good: a durable attachment reference was found, or
// the tombstone's re-delete schedule is exhausted. Lease-token guarded so an
// expired-lease reclaim by another
// replica cannot be clobbered; workspace_id explicit per the tenancy rule.
func (q *Queries) DeleteChannelMediaPendingObject(ctx context.Context, arg DeleteChannelMediaPendingObjectParams) (int64, error) {
	result, err := q.db.Exec(ctx, deleteChannelMediaPendingObject, arg.StorageKey, arg.WorkspaceID, arg.LeaseToken)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const deleteChannelOutboundCardMessagesBySession = `-- name: DeleteChannelOutboundCardMessagesBySession :exec
DELETE FROM channel_outbound_card_message
WHERE chat_session_id = $1
`

// Application-layer integrity (channel_* has no FK/cascade, MUL-3515 §4): drop the
// outbound card-message rows for a chat_session being deleted. They are keyed by
// chat_session_id with no FK and no reaper, so the standalone chat-session delete
// path must prune them here alongside DeleteChannelChatSessionBindingBySession —
// otherwise deleting a chat session leaves them as permanent orphans (Elon's
// follow-up on #4810; the workspace/agent/reclaim sweeps already cover their
// paths). A card that survived its session could only mis-route a later patch.
func (q *Queries) DeleteChannelOutboundCardMessagesBySession(ctx context.Context, chatSessionID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteChannelOutboundCardMessagesBySession, chatSessionID)
	return err
}

const deleteChannelUserBindingsByInstallation = `-- name: DeleteChannelUserBindingsByInstallation :exec
DELETE FROM channel_user_binding
WHERE installation_id = $1
`

// Application-layer integrity (schema has no FK/cascade, MUL-3515 §4): drop
// every member account link for an installation that is being hard-deleted.
// Rebinding a Feishu bot to a DIFFERENT agent starts a fresh installation, so
// old links do not follow — a different agent is a distinct connection and
// members re-establish their link on first contact. The rows could never be
// reused anyway (every Feishu identity lookup is installation_id-scoped, and
// FindReusableChannelUserBinding is Slack-only), so removing them just keeps
// dead rows from accumulating.
func (q *Queries) DeleteChannelUserBindingsByInstallation(ctx context.Context, installationID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, deleteChannelUserBindingsByInstallation, installationID)
	return err
}

const deleteChannelUserBindingsByWorkspaceMember = `-- name: DeleteChannelUserBindingsByWorkspaceMember :exec
DELETE FROM channel_user_binding
WHERE workspace_id = $1 AND multica_user_id = $2
`

type DeleteChannelUserBindingsByWorkspaceMemberParams struct {
	WorkspaceID   pgtype.UUID `json:"workspace_id"`
	MulticaUserID pgtype.UUID `json:"multica_user_id"`
}

// Application-layer integrity (replaces the old member-FK ON DELETE
// CASCADE): prune every binding for a user who has been removed from a
// workspace, across all installations in that workspace.
func (q *Queries) DeleteChannelUserBindingsByWorkspaceMember(ctx context.Context, arg DeleteChannelUserBindingsByWorkspaceMemberParams) error {
	_, err := q.db.Exec(ctx, deleteChannelUserBindingsByWorkspaceMember, arg.WorkspaceID, arg.MulticaUserID)
	return err
}

const findChannelBindingForMember = `-- name: FindChannelBindingForMember :one
SELECT b.id, b.workspace_id, b.multica_user_id, b.installation_id, b.channel_type, b.channel_user_id, b.config, b.bound_at FROM channel_user_binding b
JOIN channel_installation ci ON ci.id = b.installation_id
WHERE b.workspace_id = $1
  AND b.multica_user_id = $2
  AND b.channel_type = $3
  AND ci.status = 'active'
ORDER BY b.bound_at DESC
LIMIT 1
`

type FindChannelBindingForMemberParams struct {
	WorkspaceID   pgtype.UUID `json:"workspace_id"`
	MulticaUserID pgtype.UUID `json:"multica_user_id"`
	ChannelType   string      `json:"channel_type"`
}

// Outbound notification lookup: given a Multica member and a channel_type,
// return the (installation, channel_user_id) that outbound push should
// target. The wecom smart-bot inbox-notification path uses this to decide
// whether to deliver via the bot at all — no row means "unbound member,
// fall back to the legacy path (TOF/RTX)".
//
// If a member has bound multiple installations of the same channel_type in
// one workspace (multi-bot org), the most-recently-bound wins — matches
// FindReusableChannelUserBinding's tiebreak so the two lookups agree.
func (q *Queries) FindChannelBindingForMember(ctx context.Context, arg FindChannelBindingForMemberParams) (ChannelUserBinding, error) {
	row := q.db.QueryRow(ctx, findChannelBindingForMember, arg.WorkspaceID, arg.MulticaUserID, arg.ChannelType)
	var i ChannelUserBinding
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.MulticaUserID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.Config,
		&i.BoundAt,
	)
	return i, err
}

const findLiveChannelBindingToken = `-- name: FindLiveChannelBindingToken :one
SELECT token_hash, workspace_id, installation_id, channel_type, channel_user_id, expires_at, consumed_at, created_at FROM channel_binding_token
WHERE installation_id = $1
  AND channel_type = $2
  AND channel_user_id = $3
  AND consumed_at IS NULL
  AND expires_at > now()
  AND created_at >= now() - $4::interval
ORDER BY created_at DESC
LIMIT 1
`

type FindLiveChannelBindingTokenParams struct {
	InstallationID pgtype.UUID     `json:"installation_id"`
	ChannelType    string          `json:"channel_type"`
	ChannelUserID  string          `json:"channel_user_id"`
	MintInterval   pgtype.Interval `json:"mint_interval"`
}

// Mint guard: the newest token for this platform user that is still
// unconsumed, unexpired, and recent enough that the link already sitting in
// their chat is the one to point back at. Without it every message from an
// unbound user mints another row, so a user who keeps typing at a bot they
// have not linked yet writes one row per message. This narrows that to
// roughly one row per window; it is not a hard guarantee, since the caller
// runs this and the insert as two statements.
//
// `mint_interval` is the caller's throttle window (see
// wecom.BindingTokenMintInterval). It is subtracted from now() rather than
// passed in as an absolute cutoff so the whole window is measured on the
// database clock: created_at is stamped by the column default, and comparing
// it against an application-side timestamp would let clock skew between the
// two stretch or shrink the window. The consumed_at / expires_at predicates
// keep an already-redeemed or stale token from suppressing a mint the user
// actually needs.
//
// idx_channel_binding_token_installation covers the installation_id prefix;
// the rest is a filter over that installation's live tokens, which is a small
// set because nothing here outlives the 15-minute TTL.
func (q *Queries) FindLiveChannelBindingToken(ctx context.Context, arg FindLiveChannelBindingTokenParams) (ChannelBindingToken, error) {
	row := q.db.QueryRow(ctx, findLiveChannelBindingToken,
		arg.InstallationID,
		arg.ChannelType,
		arg.ChannelUserID,
		arg.MintInterval,
	)
	var i ChannelBindingToken
	err := row.Scan(
		&i.TokenHash,
		&i.WorkspaceID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.ExpiresAt,
		&i.ConsumedAt,
		&i.CreatedAt,
	)
	return i, err
}

const findReusableChannelUserBinding = `-- name: FindReusableChannelUserBinding :one
SELECT b.id, b.workspace_id, b.multica_user_id, b.installation_id, b.channel_type, b.channel_user_id, b.config, b.bound_at FROM channel_user_binding b
JOIN channel_installation ci ON ci.id = b.installation_id
WHERE b.workspace_id = $1
  AND b.channel_type = $2
  AND b.channel_user_id = $3
  AND ci.config ->> 'team_id' = $4::text
ORDER BY b.bound_at DESC
LIMIT 1
`

type FindReusableChannelUserBindingParams struct {
	WorkspaceID   pgtype.UUID `json:"workspace_id"`
	ChannelType   string      `json:"channel_type"`
	ChannelUserID string      `json:"channel_user_id"`
	TeamID        string      `json:"team_id"`
}

// Cross-installation account-link reuse (MUL-3911). When a platform user
// messages an installation they have NOT linked, but the SAME user id is already
// bound to ANOTHER installation in the SAME Multica workspace + SAME Slack team,
// the inbound identity step reuses that link instead of re-prompting. Slack user
// ids are stable within a team, so an identical channel_user_id denotes the same
// human across that team's apps. The match is fenced to one workspace AND one
// team (installation config->>'team_id'): a Slack team can be connected to two
// different Multica workspaces, and a user may hold different Multica accounts in
// each, so reuse must cross neither boundary. Most-recently-bound wins. The
// caller re-checks membership and materializes a fresh per-installation binding.
//
// team_id is pinned ::text so sqlc types the arg as a string instead of
// attributing the bare param to the JSONB config column (mirrors
// GetChannelInstallationByAppID's app_id cast).
func (q *Queries) FindReusableChannelUserBinding(ctx context.Context, arg FindReusableChannelUserBindingParams) (ChannelUserBinding, error) {
	row := q.db.QueryRow(ctx, findReusableChannelUserBinding,
		arg.WorkspaceID,
		arg.ChannelType,
		arg.ChannelUserID,
		arg.TeamID,
	)
	var i ChannelUserBinding
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.MulticaUserID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.Config,
		&i.BoundAt,
	)
	return i, err
}

const getChannelChatContextGeneration = `-- name: GetChannelChatContextGeneration :one
SELECT chat_session_id, revision, history_start_message_id, history_end_message_id, history_boundary_pending, pending_fresh, initiator_user_id, created_at FROM channel_chat_context_generation
WHERE chat_session_id = $1
  AND revision = $2
`

type GetChannelChatContextGenerationParams struct {
	ChatSessionID pgtype.UUID `json:"chat_session_id"`
	Revision      int64       `json:"revision"`
}

func (q *Queries) GetChannelChatContextGeneration(ctx context.Context, arg GetChannelChatContextGenerationParams) (ChannelChatContextGeneration, error) {
	row := q.db.QueryRow(ctx, getChannelChatContextGeneration, arg.ChatSessionID, arg.Revision)
	var i ChannelChatContextGeneration
	err := row.Scan(
		&i.ChatSessionID,
		&i.Revision,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
		&i.PendingFresh,
		&i.InitiatorUserID,
		&i.CreatedAt,
	)
	return i, err
}

const getChannelChatSessionBinding = `-- name: GetChannelChatSessionBinding :one
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending FROM channel_chat_session_binding
WHERE installation_id = $1 AND channel_chat_id = $2 AND retired_at IS NULL
`

type GetChannelChatSessionBindingParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelChatID  string      `json:"channel_chat_id"`
}

// Lookup-by-channel-chat: the inbound dispatcher finds the existing
// chat_session before deciding whether to create one.
func (q *Queries) GetChannelChatSessionBinding(ctx context.Context, arg GetChannelChatSessionBindingParams) (ChannelChatSessionBinding, error) {
	row := q.db.QueryRow(ctx, getChannelChatSessionBinding, arg.InstallationID, arg.ChannelChatID)
	var i ChannelChatSessionBinding
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
		&i.PendingFresh,
		&i.ContextRevision,
		&i.RouteRevision,
		&i.RetiredAt,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
	)
	return i, err
}

const getChannelChatSessionBindingBySession = `-- name: GetChannelChatSessionBindingBySession :one
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending FROM channel_chat_session_binding
WHERE chat_session_id = $1
  AND channel_type = $2
`

type GetChannelChatSessionBindingBySessionParams struct {
	ChatSessionID pgtype.UUID `json:"chat_session_id"`
	ChannelType   string      `json:"channel_type"`
}

// Reverse lookup for the outbound patcher: given a chat_session_id, find
// its channel binding to know which (installation, chat_id) to send to.
// Scoped by channel_type so a future non-Feishu binding on the same
// chat_session is never treated as a Feishu reply target.
func (q *Queries) GetChannelChatSessionBindingBySession(ctx context.Context, arg GetChannelChatSessionBindingBySessionParams) (ChannelChatSessionBinding, error) {
	row := q.db.QueryRow(ctx, getChannelChatSessionBindingBySession, arg.ChatSessionID, arg.ChannelType)
	var i ChannelChatSessionBinding
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
		&i.PendingFresh,
		&i.ContextRevision,
		&i.RouteRevision,
		&i.RetiredAt,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
	)
	return i, err
}

const getChannelChatSessionBindingBySessionAny = `-- name: GetChannelChatSessionBindingBySessionAny :one
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending FROM channel_chat_session_binding
WHERE chat_session_id = $1
`

// Channel-agnostic reverse lookup: which channel, if any, is behind this
// chat_session? UNIQUE (chat_session_id) guarantees at most one row, so a
// caller that only needs to READ the binding never has to name the channel it
// is hoping for — and therefore cannot go blind on a channel added later.
// The channel_type-scoped variant above stays for the outbound senders, which
// are per-platform by construction and must not deliver into a foreign one.
func (q *Queries) GetChannelChatSessionBindingBySessionAny(ctx context.Context, chatSessionID pgtype.UUID) (ChannelChatSessionBinding, error) {
	row := q.db.QueryRow(ctx, getChannelChatSessionBindingBySessionAny, chatSessionID)
	var i ChannelChatSessionBinding
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
		&i.PendingFresh,
		&i.ContextRevision,
		&i.RouteRevision,
		&i.RetiredAt,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
	)
	return i, err
}

const getChannelInstallation = `-- name: GetChannelInstallation :one
SELECT id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at FROM channel_installation
WHERE id = $1 AND channel_type = $2
`

type GetChannelInstallationParams struct {
	ID          pgtype.UUID `json:"id"`
	ChannelType string      `json:"channel_type"`
}

// Scoped by channel_type: a per-channel caller (e.g. the Feishu store)
// must never resolve another channel's installation by guessing its UUID.
func (q *Queries) GetChannelInstallation(ctx context.Context, arg GetChannelInstallationParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, getChannelInstallation, arg.ID, arg.ChannelType)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const getChannelInstallationByAppID = `-- name: GetChannelInstallationByAppID :one
SELECT id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at FROM channel_installation
WHERE channel_type = $1
  AND config ->> 'app_id' = $2::text
`

type GetChannelInstallationByAppIDParams struct {
	ChannelType string `json:"channel_type"`
	AppID       string `json:"app_id"`
}

// Inbound routing. The platform event carries only the channel's app
// identifier (Feishu app_id); the dispatcher's installation resolver routes
// on (channel_type, config->>'app_id'). Backed by the functional unique
// index idx_channel_installation_type_appid.
//
// Both params are named + explicitly typed: `config ->> 'app_id'` makes sqlc
// attribute a bare `$2` to the JSONB `config` column (it would emit
// `Config []byte`), so we pin the app_id arg to ::text to get AppID string.
func (q *Queries) GetChannelInstallationByAppID(ctx context.Context, arg GetChannelInstallationByAppIDParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, getChannelInstallationByAppID, arg.ChannelType, arg.AppID)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const getChannelInstallationInWorkspace = `-- name: GetChannelInstallationInWorkspace :one
SELECT id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at FROM channel_installation
WHERE id = $1
  AND workspace_id = $2
  AND channel_type = $3
`

type GetChannelInstallationInWorkspaceParams struct {
	ID          pgtype.UUID `json:"id"`
	WorkspaceID pgtype.UUID `json:"workspace_id"`
	ChannelType string      `json:"channel_type"`
}

func (q *Queries) GetChannelInstallationInWorkspace(ctx context.Context, arg GetChannelInstallationInWorkspaceParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, getChannelInstallationInWorkspace, arg.ID, arg.WorkspaceID, arg.ChannelType)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const getChannelInstallationOwnerByAppID = `-- name: GetChannelInstallationOwnerByAppID :one
SELECT ci.workspace_id, ci.agent_id, a.archived_at AS agent_archived_at
FROM channel_installation ci
JOIN agent a ON a.id = ci.agent_id
WHERE ci.channel_type = $1
  AND ci.config ->> 'app_id' = $2::text
`

type GetChannelInstallationOwnerByAppIDParams struct {
	ChannelType string `json:"channel_type"`
	AppID       string `json:"app_id"`
}

type GetChannelInstallationOwnerByAppIDRow struct {
	WorkspaceID     pgtype.UUID        `json:"workspace_id"`
	AgentID         pgtype.UUID        `json:"agent_id"`
	AgentArchivedAt pgtype.Timestamptz `json:"agent_archived_at"`
}

// Identifies the LIVE owner of a (channel_type, config->>'app_id') routing slot
// so the install path can refuse a rebind with an ACCURATE message instead of the
// old catch-all "connected to a different Multica workspace". Meant to be read
// only after ReclaimDeadChannelInstallationByAppID has removed every DEAD owner,
// so a returned row is a live active owner. `agent_archived` distinguishes an
// archived (reversible) owner — its bot stays owned, recovered by unarchiving the
// agent or disconnecting the bot — from a plain active one. The JOIN drops a row
// whose agent no longer exists (an orphan the reclaim gate should already have
// cleared), so a missing row (pgx.ErrNoRows) means "no live owner". The caller
// reads agent_archived_at.Valid to tell an archived (reversible) owner apart.
func (q *Queries) GetChannelInstallationOwnerByAppID(ctx context.Context, arg GetChannelInstallationOwnerByAppIDParams) (GetChannelInstallationOwnerByAppIDRow, error) {
	row := q.db.QueryRow(ctx, getChannelInstallationOwnerByAppID, arg.ChannelType, arg.AppID)
	var i GetChannelInstallationOwnerByAppIDRow
	err := row.Scan(&i.WorkspaceID, &i.AgentID, &i.AgentArchivedAt)
	return i, err
}

const getChannelInstallationSlotOwnerByAppID = `-- name: GetChannelInstallationSlotOwnerByAppID :one
SELECT ci.id, ci.workspace_id, ci.agent_id, ci.status,
       a.archived_at AS agent_archived_at,
       (a.id IS NOT NULL)::boolean AS agent_exists,
       (w.id IS NOT NULL)::boolean AS workspace_exists
FROM channel_installation ci
LEFT JOIN agent a ON a.id = ci.agent_id
LEFT JOIN workspace w ON w.id = ci.workspace_id
WHERE ci.channel_type = $1
  AND ci.config ->> 'app_id' = $2::text
`

type GetChannelInstallationSlotOwnerByAppIDParams struct {
	ChannelType string `json:"channel_type"`
	AppID       string `json:"app_id"`
}

type GetChannelInstallationSlotOwnerByAppIDRow struct {
	ID              pgtype.UUID        `json:"id"`
	WorkspaceID     pgtype.UUID        `json:"workspace_id"`
	AgentID         pgtype.UUID        `json:"agent_id"`
	Status          string             `json:"status"`
	AgentArchivedAt pgtype.Timestamptz `json:"agent_archived_at"`
	AgentExists     bool               `json:"agent_exists"`
	WorkspaceExists bool               `json:"workspace_exists"`
}

// Everything the install path needs to classify the current holder of a
// (channel_type, config->>'app_id') slot BEFORE it acts on it, in one read.
// Distinct from GetChannelInstallationOwnerByAppID, which is the after-the-fact
// "name the conflict" read and INNER JOINs the agent away.
//
// Here the joins are LEFT so an ORPHAN row survives the read: with no FKs
// (MUL-3515 §4) an installation outlives a deleted workspace or agent, and the
// caller has to tell "orphan, reclaimable" apart from "live owner, refuse".
// workspace_exists / agent_exists carry that; status and agent_archived_at
// carry the rest of ReclaimDeadChannelInstallationByAppID's own definition of
// dead, so the caller can predict what the reclaim would do without running it.
// pgx.ErrNoRows means the slot is free.
func (q *Queries) GetChannelInstallationSlotOwnerByAppID(ctx context.Context, arg GetChannelInstallationSlotOwnerByAppIDParams) (GetChannelInstallationSlotOwnerByAppIDRow, error) {
	row := q.db.QueryRow(ctx, getChannelInstallationSlotOwnerByAppID, arg.ChannelType, arg.AppID)
	var i GetChannelInstallationSlotOwnerByAppIDRow
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.Status,
		&i.AgentArchivedAt,
		&i.AgentExists,
		&i.WorkspaceExists,
	)
	return i, err
}

const getChannelOutboundCardByTask = `-- name: GetChannelOutboundCardByTask :one
SELECT id, chat_session_id, task_id, channel_type, channel_chat_id, channel_card_message_id, status, last_patched_at, created_at FROM channel_outbound_card_message
WHERE task_id = $1
  AND channel_type = $2
`

type GetChannelOutboundCardByTaskParams struct {
	TaskID      pgtype.UUID `json:"task_id"`
	ChannelType string      `json:"channel_type"`
}

// The partial unique index on (task_id) WHERE task_id IS NOT NULL
// guarantees at most one row. Scoped by channel_type so a future non-Feishu
// card for the same task is not patched as a Feishu card.
func (q *Queries) GetChannelOutboundCardByTask(ctx context.Context, arg GetChannelOutboundCardByTaskParams) (ChannelOutboundCardMessage, error) {
	row := q.db.QueryRow(ctx, getChannelOutboundCardByTask, arg.TaskID, arg.ChannelType)
	var i ChannelOutboundCardMessage
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.TaskID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChannelCardMessageID,
		&i.Status,
		&i.LastPatchedAt,
		&i.CreatedAt,
	)
	return i, err
}

const getChannelTaskDelivery = `-- name: GetChannelTaskDelivery :one
SELECT task_id, binding_id, installation_id, channel_type, channel_chat_id, chat_type, channel_message_id, channel_thread_id, route_revision, config, created_at FROM channel_task_delivery WHERE task_id = $1
`

func (q *Queries) GetChannelTaskDelivery(ctx context.Context, taskID pgtype.UUID) (ChannelTaskDelivery, error) {
	row := q.db.QueryRow(ctx, getChannelTaskDelivery, taskID)
	var i ChannelTaskDelivery
	err := row.Scan(
		&i.TaskID,
		&i.BindingID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.ChannelMessageID,
		&i.ChannelThreadID,
		&i.RouteRevision,
		&i.Config,
		&i.CreatedAt,
	)
	return i, err
}

const getChannelUserBindingByUserID = `-- name: GetChannelUserBindingByUserID :one
SELECT id, workspace_id, multica_user_id, installation_id, channel_type, channel_user_id, config, bound_at FROM channel_user_binding
WHERE installation_id = $1 AND channel_user_id = $2
`

type GetChannelUserBindingByUserIDParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelUserID  string      `json:"channel_user_id"`
}

// The inbound identity lookup: does this platform user id map to a Multica
// user for this installation? With the member-FK removed, a row's
// existence no longer proves current workspace membership — the dispatcher
// re-checks membership after this lookup.
func (q *Queries) GetChannelUserBindingByUserID(ctx context.Context, arg GetChannelUserBindingByUserIDParams) (ChannelUserBinding, error) {
	row := q.db.QueryRow(ctx, getChannelUserBindingByUserID, arg.InstallationID, arg.ChannelUserID)
	var i ChannelUserBinding
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.MulticaUserID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelUserID,
		&i.Config,
		&i.BoundAt,
	)
	return i, err
}

const listActiveChannelInstallations = `-- name: ListActiveChannelInstallations :many
SELECT ci.id, ci.workspace_id, ci.agent_id, ci.channel_type, ci.config, ci.status, ci.ws_lease_token, ci.ws_lease_expires_at, ci.installer_user_id, ci.installed_at, ci.created_at, ci.updated_at FROM channel_installation ci
JOIN workspace w ON w.id = ci.workspace_id
JOIN agent a ON a.id = ci.agent_id
WHERE ci.status = 'active'
  AND ci.channel_type = $1
ORDER BY ci.created_at ASC
`

// Boot path for a per-channel-type inbound hub: every active installation of
// the given channel_type, so a hub claims leases and opens connections only
// for its own platform and never supervises another channel's installation.
//
// The JOINs require the owning workspace and agent rows to still exist.
// channel_installation has no FK (MUL-3515 §4), so unlike the old
// lark_installation (which cascaded away on workspace/agent deletion) an
// installation can be orphaned when its workspace is deleted or its agent is
// hard-deleted (e.g. runtime teardown). Without this guard the hub would keep
// opening a WebSocket for a bot whose workspace/agent is gone. The JOIN matches
// the old ON DELETE CASCADE semantics: it filters on row existence, not agent
// archival, so an archived-but-present agent's installation is still listed.
func (q *Queries) ListActiveChannelInstallations(ctx context.Context, channelType string) ([]ChannelInstallation, error) {
	rows, err := q.db.Query(ctx, listActiveChannelInstallations, channelType)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []ChannelInstallation{}
	for rows.Next() {
		var i ChannelInstallation
		if err := rows.Scan(
			&i.ID,
			&i.WorkspaceID,
			&i.AgentID,
			&i.ChannelType,
			&i.Config,
			&i.Status,
			&i.WsLeaseToken,
			&i.WsLeaseExpiresAt,
			&i.InstallerUserID,
			&i.InstalledAt,
			&i.CreatedAt,
			&i.UpdatedAt,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listAllActiveChannelInstallations = `-- name: ListAllActiveChannelInstallations :many
SELECT ci.id, ci.workspace_id, ci.agent_id, ci.channel_type, ci.config, ci.status, ci.ws_lease_token, ci.ws_lease_expires_at, ci.installer_user_id, ci.installed_at, ci.created_at, ci.updated_at FROM channel_installation ci
JOIN workspace w ON w.id = ci.workspace_id
JOIN agent a ON a.id = ci.agent_id
WHERE ci.status = 'active'
ORDER BY ci.created_at ASC
`

// Boot path for the channel-agnostic engine Supervisor (MUL-3620): every
// active installation across ALL channel types, so one Supervisor drives every
// platform's connections rather than a per-platform hub. This is the de-
// hardcoded counterpart of ListActiveChannelInstallations — the Supervisor
// routes each row to its registered channel.Factory by channel_type, so it
// never needs to know which platforms exist. Same orphan guard as the per-type
// query: the workspace + agent JOINs drop installations whose owning rows are
// gone (channel_installation has no FK, MUL-3515 §4), matching the old ON
// DELETE CASCADE semantics (row existence, not agent archival).
func (q *Queries) ListAllActiveChannelInstallations(ctx context.Context) ([]ChannelInstallation, error) {
	rows, err := q.db.Query(ctx, listAllActiveChannelInstallations)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []ChannelInstallation{}
	for rows.Next() {
		var i ChannelInstallation
		if err := rows.Scan(
			&i.ID,
			&i.WorkspaceID,
			&i.AgentID,
			&i.ChannelType,
			&i.Config,
			&i.Status,
			&i.WsLeaseToken,
			&i.WsLeaseExpiresAt,
			&i.InstallerUserID,
			&i.InstalledAt,
			&i.CreatedAt,
			&i.UpdatedAt,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listChannelChatSessionBindingsBySessions = `-- name: ListChannelChatSessionBindingsBySessions :many
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending FROM channel_chat_session_binding
WHERE chat_session_id = ANY($1::uuid[])
`

// Batch projection for Chat list responses. Historical bindings are retained,
// so retired Chats keep their channel source while only the active generation
// reports itself as the current route.
func (q *Queries) ListChannelChatSessionBindingsBySessions(ctx context.Context, chatSessionIds []pgtype.UUID) ([]ChannelChatSessionBinding, error) {
	rows, err := q.db.Query(ctx, listChannelChatSessionBindingsBySessions, chatSessionIds)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []ChannelChatSessionBinding{}
	for rows.Next() {
		var i ChannelChatSessionBinding
		if err := rows.Scan(
			&i.ID,
			&i.ChatSessionID,
			&i.InstallationID,
			&i.ChannelType,
			&i.ChannelChatID,
			&i.ChatType,
			&i.LastMessageID,
			&i.LastThreadID,
			&i.Config,
			&i.CreatedAt,
			&i.PendingFresh,
			&i.ContextRevision,
			&i.RouteRevision,
			&i.RetiredAt,
			&i.HistoryStartMessageID,
			&i.HistoryEndMessageID,
			&i.HistoryBoundaryPending,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listChannelInboundAuditByInstallation = `-- name: ListChannelInboundAuditByInstallation :many
SELECT id, installation_id, channel_type, channel_chat_id, event_type, channel_event_id, channel_message_id, drop_reason, received_at FROM channel_inbound_audit
WHERE installation_id = $1
ORDER BY received_at DESC
LIMIT $2 OFFSET $3
`

type ListChannelInboundAuditByInstallationParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	Limit          int32       `json:"limit"`
	Offset         int32       `json:"offset"`
}

func (q *Queries) ListChannelInboundAuditByInstallation(ctx context.Context, arg ListChannelInboundAuditByInstallationParams) ([]ChannelInboundAudit, error) {
	rows, err := q.db.Query(ctx, listChannelInboundAuditByInstallation, arg.InstallationID, arg.Limit, arg.Offset)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []ChannelInboundAudit{}
	for rows.Next() {
		var i ChannelInboundAudit
		if err := rows.Scan(
			&i.ID,
			&i.InstallationID,
			&i.ChannelType,
			&i.ChannelChatID,
			&i.EventType,
			&i.ChannelEventID,
			&i.ChannelMessageID,
			&i.DropReason,
			&i.ReceivedAt,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listChannelInstallationsByWorkspace = `-- name: ListChannelInstallationsByWorkspace :many
SELECT id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at FROM channel_installation
WHERE workspace_id = $1
  AND channel_type = $2
ORDER BY created_at ASC
`

type ListChannelInstallationsByWorkspaceParams struct {
	WorkspaceID pgtype.UUID `json:"workspace_id"`
	ChannelType string      `json:"channel_type"`
}

// Scoped by channel_type so a per-channel management surface (e.g. the Lark
// installation list) only ever sees its own platform's installations.
func (q *Queries) ListChannelInstallationsByWorkspace(ctx context.Context, arg ListChannelInstallationsByWorkspaceParams) ([]ChannelInstallation, error) {
	rows, err := q.db.Query(ctx, listChannelInstallationsByWorkspace, arg.WorkspaceID, arg.ChannelType)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []ChannelInstallation{}
	for rows.Next() {
		var i ChannelInstallation
		if err := rows.Scan(
			&i.ID,
			&i.WorkspaceID,
			&i.AgentID,
			&i.ChannelType,
			&i.Config,
			&i.Status,
			&i.WsLeaseToken,
			&i.WsLeaseExpiresAt,
			&i.InstallerUserID,
			&i.InstalledAt,
			&i.CreatedAt,
			&i.UpdatedAt,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listChannelOutboundMessageIDsForBinding = `-- name: ListChannelOutboundMessageIDsForBinding :many
SELECT outbound.channel_message_id FROM channel_outbound_message AS outbound
WHERE outbound.binding_id = $1
ORDER BY outbound.created_at ASC
`

func (q *Queries) ListChannelOutboundMessageIDsForBinding(ctx context.Context, bindingID pgtype.UUID) ([]string, error) {
	rows, err := q.db.Query(ctx, listChannelOutboundMessageIDsForBinding, bindingID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []string{}
	for rows.Next() {
		var channel_message_id string
		if err := rows.Scan(&channel_message_id); err != nil {
			return nil, err
		}
		items = append(items, channel_message_id)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const listChannelOutboundMessagesByIDs = `-- name: ListChannelOutboundMessagesByIDs :many
SELECT outbound.installation_id, outbound.channel_type, outbound.channel_message_id, outbound.binding_id, outbound.route_revision, outbound.task_id, outbound.outbound_kind, outbound.created_at FROM channel_outbound_message AS outbound
WHERE outbound.installation_id = $1
  AND outbound.channel_message_id = ANY($2::text[])
`

type ListChannelOutboundMessagesByIDsParams struct {
	InstallationID    pgtype.UUID `json:"installation_id"`
	ChannelMessageIds []string    `json:"channel_message_ids"`
}

func (q *Queries) ListChannelOutboundMessagesByIDs(ctx context.Context, arg ListChannelOutboundMessagesByIDsParams) ([]ChannelOutboundMessage, error) {
	rows, err := q.db.Query(ctx, listChannelOutboundMessagesByIDs, arg.InstallationID, arg.ChannelMessageIds)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []ChannelOutboundMessage{}
	for rows.Next() {
		var i ChannelOutboundMessage
		if err := rows.Scan(
			&i.InstallationID,
			&i.ChannelType,
			&i.ChannelMessageID,
			&i.BindingID,
			&i.RouteRevision,
			&i.TaskID,
			&i.OutboundKind,
			&i.CreatedAt,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const lockChannelChatContextGenerationByRevision = `-- name: LockChannelChatContextGenerationByRevision :one
SELECT chat_session_id, revision, history_start_message_id, history_end_message_id, history_boundary_pending, pending_fresh, initiator_user_id, created_at FROM channel_chat_context_generation
WHERE chat_session_id = $1
  AND revision = $2
FOR UPDATE
`

type LockChannelChatContextGenerationByRevisionParams struct {
	ChatSessionID pgtype.UUID `json:"chat_session_id"`
	Revision      int64       `json:"revision"`
}

func (q *Queries) LockChannelChatContextGenerationByRevision(ctx context.Context, arg LockChannelChatContextGenerationByRevisionParams) (ChannelChatContextGeneration, error) {
	row := q.db.QueryRow(ctx, lockChannelChatContextGenerationByRevision, arg.ChatSessionID, arg.Revision)
	var i ChannelChatContextGeneration
	err := row.Scan(
		&i.ChatSessionID,
		&i.Revision,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
		&i.PendingFresh,
		&i.InitiatorUserID,
		&i.CreatedAt,
	)
	return i, err
}

const lockChannelChatSessionBindingForContext = `-- name: LockChannelChatSessionBindingForContext :one
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending FROM channel_chat_session_binding
WHERE chat_session_id = $1
FOR UPDATE
`

// Context mutations acquire this row after chat_session and before any
// channel_chat_context_generation row. Keeping the statements separate makes
// the lock order explicit and identical for append, /clear, and task enqueue.
func (q *Queries) LockChannelChatSessionBindingForContext(ctx context.Context, chatSessionID pgtype.UUID) (ChannelChatSessionBinding, error) {
	row := q.db.QueryRow(ctx, lockChannelChatSessionBindingForContext, chatSessionID)
	var i ChannelChatSessionBinding
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
		&i.PendingFresh,
		&i.ContextRevision,
		&i.RouteRevision,
		&i.RetiredAt,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
	)
	return i, err
}

const lockChannelChatSessionPendingFresh = `-- name: LockChannelChatSessionPendingFresh :one
SELECT pending_fresh FROM channel_chat_session_binding
WHERE chat_session_id = $1
FOR UPDATE
`

// EnqueueChatTask reads this under the same row lock and transaction that
// creates the task. A concurrent `/clear` therefore lands either before this
// task and is consumed by it, or after this task and remains for the next one.
func (q *Queries) LockChannelChatSessionPendingFresh(ctx context.Context, chatSessionID pgtype.UUID) (bool, error) {
	row := q.db.QueryRow(ctx, lockChannelChatSessionPendingFresh, chatSessionID)
	var pending_fresh bool
	err := row.Scan(&pending_fresh)
	return pending_fresh, err
}

const lockChannelInstallationAppIDSlot = `-- name: LockChannelInstallationAppIDSlot :exec
SELECT pg_advisory_xact_lock(
    hashtext($1::text),
    hashtext($2::text)
)
`

type LockChannelInstallationAppIDSlotParams struct {
	ChannelType string `json:"channel_type"`
	AppID       string `json:"app_id"`
}

// Serializes everything an install does to one (channel_type, config->>'app_id')
// routing slot: read the current owner, decide, reclaim, upsert. Taken as the
// first statement of the install transaction and released by COMMIT/ROLLBACK,
// so the owner read below cannot go stale under a concurrent install or
// reconnect — a plain read-then-write leaves a TOCTOU window in which two
// callers both see "no live owner" and both go on to touch the slot.
//
// Two-key form: the first key namespaces by channel so a feishu app_id and a
// wecom bot id that hash alike do not serialize against each other. hashtext
// collisions inside one channel only cost extra serialization, never
// correctness. pg_advisory_xact_lock (not pg_try_) so a second caller waits
// its turn rather than failing.
func (q *Queries) LockChannelInstallationAppIDSlot(ctx context.Context, arg LockChannelInstallationAppIDSlotParams) error {
	_, err := q.db.Exec(ctx, lockChannelInstallationAppIDSlot, arg.ChannelType, arg.AppID)
	return err
}

const lockCurrentChannelChatSessionBinding = `-- name: LockCurrentChannelChatSessionBinding :one
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending FROM channel_chat_session_binding
WHERE installation_id = $1 AND channel_chat_id = $2 AND retired_at IS NULL
FOR UPDATE
`

type LockCurrentChannelChatSessionBindingParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	ChannelChatID  string      `json:"channel_chat_id"`
}

func (q *Queries) LockCurrentChannelChatSessionBinding(ctx context.Context, arg LockCurrentChannelChatSessionBindingParams) (ChannelChatSessionBinding, error) {
	row := q.db.QueryRow(ctx, lockCurrentChannelChatSessionBinding, arg.InstallationID, arg.ChannelChatID)
	var i ChannelChatSessionBinding
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
		&i.PendingFresh,
		&i.ContextRevision,
		&i.RouteRevision,
		&i.RetiredAt,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
	)
	return i, err
}

const lockCurrentChannelChatSessionBindingBySession = `-- name: LockCurrentChannelChatSessionBindingBySession :one
SELECT id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending FROM channel_chat_session_binding
WHERE chat_session_id = $1 AND retired_at IS NULL
FOR UPDATE
`

// Shared append fence. A message may have resolved a Chat immediately before
// /new retired it; locking only chat_session would then let the stale append
// land after the route switch. Requiring the binding to remain current makes
// every adapter retry against the winning generation.
func (q *Queries) LockCurrentChannelChatSessionBindingBySession(ctx context.Context, chatSessionID pgtype.UUID) (ChannelChatSessionBinding, error) {
	row := q.db.QueryRow(ctx, lockCurrentChannelChatSessionBindingBySession, chatSessionID)
	var i ChannelChatSessionBinding
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
		&i.PendingFresh,
		&i.ContextRevision,
		&i.RouteRevision,
		&i.RetiredAt,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
	)
	return i, err
}

const markChannelChatSessionPendingFresh = `-- name: MarkChannelChatSessionPendingFresh :one
UPDATE channel_chat_session_binding
SET pending_fresh = TRUE
WHERE chat_session_id = $1 AND retired_at IS NULL
RETURNING pending_fresh
`

// Persists a channel `/clear` intent until the next chat task is successfully
// created. RETURNING makes a missing binding an error instead of silently
// acknowledging a fresh start that was never stored.
func (q *Queries) MarkChannelChatSessionPendingFresh(ctx context.Context, chatSessionID pgtype.UUID) (bool, error) {
	row := q.db.QueryRow(ctx, markChannelChatSessionPendingFresh, chatSessionID)
	var pending_fresh bool
	err := row.Scan(&pending_fresh)
	return pending_fresh, err
}

const markChannelInboundDedupProcessed = `-- name: MarkChannelInboundDedupProcessed :execrows
UPDATE channel_inbound_message_dedup
SET processed_at = now()
WHERE installation_id = $1
  AND message_id = $2
  AND claim_token = $3
  AND processed_at IS NULL
`

type MarkChannelInboundDedupProcessedParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	MessageID      string      `json:"message_id"`
	ClaimToken     pgtype.UUID `json:"claim_token"`
}

// Locks a claim in as permanently processed after a durable outcome.
// Invoked inside the chat_message tx (via qtx) on the ingest path so the
// durable write and the Mark commit atomically. Token mismatch returns
// zero rows (a reclaim happened); the caller rolls back its in-tx write.
func (q *Queries) MarkChannelInboundDedupProcessed(ctx context.Context, arg MarkChannelInboundDedupProcessedParams) (int64, error) {
	result, err := q.db.Exec(ctx, markChannelInboundDedupProcessed, arg.InstallationID, arg.MessageID, arg.ClaimToken)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const nullChannelInboundAuditInstallationID = `-- name: NullChannelInboundAuditInstallationID :exec
UPDATE channel_inbound_audit
SET installation_id = NULL
WHERE installation_id = $1
`

// Application-layer stand-in for the old ON DELETE SET NULL (MUL-3515 §4,
// migration 124 keeps installation_id nullable for exactly this): before an
// installation row is hard-deleted, detach its inbound-audit rows by NULLing
// installation_id. The drop-audit history is preserved (channel_type,
// chat/message ids, drop_reason stay) without a dangling reference to a
// removed installation.
func (q *Queries) NullChannelInboundAuditInstallationID(ctx context.Context, installationID pgtype.UUID) error {
	_, err := q.db.Exec(ctx, nullChannelInboundAuditInstallationID, installationID)
	return err
}

const purgeChannelInboundDedup = `-- name: PurgeChannelInboundDedup :exec
DELETE FROM channel_inbound_message_dedup
WHERE received_at < $1
`

// Vacuum job: remove dedup rows older than the supplied cutoff (e.g. 24h).
func (q *Queries) PurgeChannelInboundDedup(ctx context.Context, receivedAt pgtype.Timestamptz) error {
	_, err := q.db.Exec(ctx, purgeChannelInboundDedup, receivedAt)
	return err
}

const purgeExpiredChannelBindingTokens = `-- name: PurgeExpiredChannelBindingTokens :exec
DELETE FROM channel_binding_token
WHERE expires_at < $1
`

func (q *Queries) PurgeExpiredChannelBindingTokens(ctx context.Context, expiresAt pgtype.Timestamptz) error {
	_, err := q.db.Exec(ctx, purgeExpiredChannelBindingTokens, expiresAt)
	return err
}

const reclaimDeadChannelInstallationByAppID = `-- name: ReclaimDeadChannelInstallationByAppID :one
WITH dead AS (
    DELETE FROM channel_installation ci
    WHERE ci.channel_type = $1
      AND ci.config ->> 'app_id' = $2::text
      AND (
            (ci.status = 'revoked'
                AND NOT (ci.workspace_id = $3
                         AND ci.agent_id = $4))
         OR NOT EXISTS (SELECT 1 FROM workspace w WHERE w.id = ci.workspace_id)
         OR NOT EXISTS (SELECT 1 FROM agent a WHERE a.id = ci.agent_id)
      )
    RETURNING ci.id
),
cleared_dingtalk_group_presence AS (
    DELETE FROM dingtalk_group_presence WHERE installation_id IN (SELECT id FROM dead)
),
cleared_dingtalk_bot_identity AS (
    DELETE FROM dingtalk_bot_identity WHERE installation_id IN (SELECT id FROM dead)
),
cleared_dingtalk_group_routes AS (
    DELETE FROM dingtalk_group_route WHERE installation_id IN (SELECT id FROM dead)
),
cleared_task_deliveries AS (
    DELETE FROM channel_task_delivery WHERE installation_id IN (SELECT id FROM dead)
),
cleared_outbound_messages AS (
    DELETE FROM channel_outbound_message WHERE installation_id IN (SELECT id FROM dead)
),
cleared_chat_sessions AS (
    DELETE FROM channel_chat_session_binding
    WHERE installation_id IN (SELECT id FROM dead)
    RETURNING chat_session_id
),
cleared_chat_contexts AS (
    -- A revoked installation can still own preserved Chat history and an
    -- in-flight task snapshot. Remove only generations whose Chat was already
    -- cascade-deleted by an earlier orphan teardown.
    DELETE FROM channel_chat_context_generation AS generation
    WHERE generation.chat_session_id IN (SELECT chat_session_id FROM cleared_chat_sessions)
      AND NOT EXISTS (
          SELECT 1 FROM chat_session AS session
          WHERE session.id = generation.chat_session_id
      )
),
cleared_outbound_cards AS (
    -- channel_outbound_card_message is keyed by chat_session_id (no installation_id,
    -- no FK), so it is reached through the just-removed chat-session bindings. On an
    -- orphan reclaim the chat_session row itself is already cascade-gone, but its
    -- binding survived and still carries the id — the only reliable link back.
    DELETE FROM channel_outbound_card_message
    WHERE chat_session_id IN (SELECT chat_session_id FROM cleared_chat_sessions)
),
cleared_binding_tokens AS (
    DELETE FROM channel_binding_token
    WHERE installation_id IN (SELECT id FROM dead)
),
cleared_user_bindings AS (
    DELETE FROM channel_user_binding
    WHERE installation_id IN (SELECT id FROM dead)
),
cleared_inbound_dedup AS (
    DELETE FROM channel_inbound_message_dedup
    WHERE installation_id IN (SELECT id FROM dead)
),
detached_audit AS (
    -- Reclaim keeps the DETACH semantics: the workspace still exists, so a
    -- NULL-installation audit row stays meaningful for operator triage. The hard-
    -- delete paths (DeleteWorkspace / runtime teardown) purge audit outright.
    UPDATE channel_inbound_audit SET installation_id = NULL
    WHERE installation_id IN (SELECT id FROM dead)
)
SELECT id FROM dead
`

type ReclaimDeadChannelInstallationByAppIDParams struct {
	ChannelType string      `json:"channel_type"`
	AppID       string      `json:"app_id"`
	WorkspaceID pgtype.UUID `json:"workspace_id"`
	AgentID     pgtype.UUID `json:"agent_id"`
}

// Rebind cleanup gate. Frees the (channel_type, config->>'app_id') routing slot
// so a valid new agent can (re)bind a bot whose previous owner is DEAD, and, in
// the same statement, clears every application-owned dependent row of the removed
// installation (channel_* has no FK/cascade, MUL-3515 §4). Returns the removed id
// (pgx.ErrNoRows when nothing was dead — a no-op the caller treats as success).
//
// "Dead" is exactly one of:
//  1. a REVOKED placeholder held by ANY agent OTHER than the caller's own
//     (workspace, agent) pair. Disconnect only flips status to 'revoked' — no
//     product path ever hard-deletes the row — so a revoked row would otherwise
//     pin the bot's app_id slot forever with no self-serve recovery, even across
//     workspaces (workspace A disconnects; workspace B, which proves control by
//     holding the same app credentials, rebinds). Revoke is the owner's explicit
//     "I'm done with this bot", so any revoked row is reclaimable — only the
//     caller's OWN revoked row is spared (reactivated in place; see below).
//  2. an ORPHAN whose owning workspace OR agent row no longer exists — the
//     workspace was deleted, or the agent was hard-deleted on runtime teardown.
//     With no FK the installation outlives its owner and keeps occupying the
//     app_id slot: the "ghost binding" that made a bot un-rebindable (#4810).
//
// Deliberately NOT dead (the caller refuses these with an accurate conflict):
//   - the SAME agent's own revoked row (agent_id = @agent_id): the upsert
//     reactivates it in place, preserving its installation_id and every binding;
//   - a live ACTIVE owner whose agent still exists — INCLUDING an ARCHIVED agent:
//     archive is reversible, so its bot stays owned rather than being silently
//     stolen. Only a hard delete frees the slot.
//
// The guard lives in the DELETE predicate (not a prior SELECT) so under READ
// COMMITTED the row is re-checked at execution (EvalPlanQual): a concurrent
// same-agent reconnect that flips the revoked row back to 'active' first makes
// the predicate re-check fail, this deletes nothing, and no dependents are
// touched — closing the read-then-delete TOCTOU. Dependent cleanup keys off the
// actually-deleted id (the `dead` CTE), so it runs ONLY for a row this statement
// removed. The (channel_type, app_id) unique index guarantees at most one match.
func (q *Queries) ReclaimDeadChannelInstallationByAppID(ctx context.Context, arg ReclaimDeadChannelInstallationByAppIDParams) (pgtype.UUID, error) {
	row := q.db.QueryRow(ctx, reclaimDeadChannelInstallationByAppID,
		arg.ChannelType,
		arg.AppID,
		arg.WorkspaceID,
		arg.AgentID,
	)
	var id pgtype.UUID
	err := row.Scan(&id)
	return id, err
}

const recordChannelInboundDrop = `-- name: RecordChannelInboundDrop :exec

INSERT INTO channel_inbound_audit (
    installation_id, channel_type, channel_chat_id, event_type,
    channel_event_id, channel_message_id, drop_reason, id
) VALUES (
    $4,
    $1,
    $5,
    $2,
    $6,
    $7,
    $3,
    COALESCE($8::uuid, gen_random_uuid())
)
`

type RecordChannelInboundDropParams struct {
	ChannelType      string      `json:"channel_type"`
	EventType        string      `json:"event_type"`
	DropReason       string      `json:"drop_reason"`
	InstallationID   pgtype.UUID `json:"installation_id"`
	ChannelChatID    pgtype.Text `json:"channel_chat_id"`
	ChannelEventID   pgtype.Text `json:"channel_event_id"`
	ChannelMessageID pgtype.Text `json:"channel_message_id"`
	ID               pgtype.UUID `json:"id"`
}

// =====================
// channel_inbound_audit
// =====================
// The only write path for dropped events. Deliberately carries no body
// column — only routing / identity / drop_reason / timestamp.
func (q *Queries) RecordChannelInboundDrop(ctx context.Context, arg RecordChannelInboundDropParams) error {
	_, err := q.db.Exec(ctx, recordChannelInboundDrop,
		arg.ChannelType,
		arg.EventType,
		arg.DropReason,
		arg.InstallationID,
		arg.ChannelChatID,
		arg.ChannelEventID,
		arg.ChannelMessageID,
		arg.ID,
	)
	return err
}

const recordChannelMediaPendingObject = `-- name: RecordChannelMediaPendingObject :one

INSERT INTO channel_media_pending_object (
    storage_key, workspace_id, chat_message_id, storage_url, installation_id
)
VALUES ($1, $2, $3, $4, $5)
ON CONFLICT (storage_key) DO UPDATE
SET created_at = now(), next_attempt_at = now(),
    chat_message_id = EXCLUDED.chat_message_id,
    storage_url = EXCLUDED.storage_url
WHERE channel_media_pending_object.state = 'pending'
  AND channel_media_pending_object.workspace_id = EXCLUDED.workspace_id
RETURNING storage_key
`

type RecordChannelMediaPendingObjectParams struct {
	StorageKey     string      `json:"storage_key"`
	WorkspaceID    pgtype.UUID `json:"workspace_id"`
	ChatMessageID  pgtype.UUID `json:"chat_message_id"`
	StorageUrl     string      `json:"storage_url"`
	InstallationID pgtype.UUID `json:"installation_id"`
}

// =====================
// channel_media_pending_object (media intent ledger)
// =====================
// Records upload intent BEFORE the PUT. A redelivered attempt refreshes the
// settle window, but only while the row is still 'pending' — a key the
// reconciler owns ('deleting') must never be resurrected — and only within
// the SAME workspace: a cross-workspace key collision (impossible via the
// derived key, but tenancy must never trust the key string) updates nothing
// and returns no row, so the caller skips the upload entirely.
func (q *Queries) RecordChannelMediaPendingObject(ctx context.Context, arg RecordChannelMediaPendingObjectParams) (string, error) {
	row := q.db.QueryRow(ctx, recordChannelMediaPendingObject,
		arg.StorageKey,
		arg.WorkspaceID,
		arg.ChatMessageID,
		arg.StorageUrl,
		arg.InstallationID,
	)
	var storage_key string
	err := row.Scan(&storage_key)
	return storage_key, err
}

const recordChannelOutboundMessage = `-- name: RecordChannelOutboundMessage :exec

INSERT INTO channel_outbound_message (
    installation_id, channel_type, channel_message_id, binding_id,
    route_revision, task_id, outbound_kind
) VALUES (
    $1, $2,
    $3, $4,
    $5, $6,
    $7
)
ON CONFLICT (installation_id, channel_message_id) DO NOTHING
`

type RecordChannelOutboundMessageParams struct {
	OutboundInstallationID pgtype.UUID `json:"outbound_installation_id"`
	OutboundChannelType    string      `json:"outbound_channel_type"`
	OutboundMessageID      string      `json:"outbound_message_id"`
	OutboundBindingID      pgtype.UUID `json:"outbound_binding_id"`
	OutboundRouteRevision  int64       `json:"outbound_route_revision"`
	OutboundTaskID         pgtype.UUID `json:"outbound_task_id"`
	OutboundKind           string      `json:"outbound_kind"`
}

// =====================
// channel_outbound_message
// =====================
func (q *Queries) RecordChannelOutboundMessage(ctx context.Context, arg RecordChannelOutboundMessageParams) error {
	_, err := q.db.Exec(ctx, recordChannelOutboundMessage,
		arg.OutboundInstallationID,
		arg.OutboundChannelType,
		arg.OutboundMessageID,
		arg.OutboundBindingID,
		arg.OutboundRouteRevision,
		arg.OutboundTaskID,
		arg.OutboundKind,
	)
	return err
}

const releaseChannelInboundDedup = `-- name: ReleaseChannelInboundDedup :execrows
DELETE FROM channel_inbound_message_dedup
WHERE installation_id = $1
  AND message_id = $2
  AND claim_token = $3
  AND processed_at IS NULL
`

type ReleaseChannelInboundDedupParams struct {
	InstallationID pgtype.UUID `json:"installation_id"`
	MessageID      string      `json:"message_id"`
	ClaimToken     pgtype.UUID `json:"claim_token"`
}

// Releases an in-flight claim when an infra error occurred before any
// durable side effect, so a retry can re-acquire immediately. Fenced on
// processed_at IS NULL and claim_token.
func (q *Queries) ReleaseChannelInboundDedup(ctx context.Context, arg ReleaseChannelInboundDedupParams) (int64, error) {
	result, err := q.db.Exec(ctx, releaseChannelInboundDedup, arg.InstallationID, arg.MessageID, arg.ClaimToken)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const releaseChannelMediaPendingObject = `-- name: ReleaseChannelMediaPendingObject :exec
UPDATE channel_media_pending_object
SET lease_token = NULL,
    lease_expires_at = NULL,
    next_attempt_at = now() + $1::interval,
    last_error = $2
WHERE storage_key = $3
  AND workspace_id = $4
  AND lease_token = $5
`

type ReleaseChannelMediaPendingObjectParams struct {
	Backoff     pgtype.Interval `json:"backoff"`
	LastError   pgtype.Text     `json:"last_error"`
	StorageKey  string          `json:"storage_key"`
	WorkspaceID pgtype.UUID     `json:"workspace_id"`
	LeaseToken  pgtype.UUID     `json:"lease_token"`
}

// Object-storage DELETE failed: keep the row in 'deleting' (bind must still
// never attach it), release the lease, and back off the next attempt.
// workspace_id is redundant with the storage_key PK but explicit per the
// tenancy rule: every query constrains the workspace column, never trusting
// the key string.
func (q *Queries) ReleaseChannelMediaPendingObject(ctx context.Context, arg ReleaseChannelMediaPendingObjectParams) error {
	_, err := q.db.Exec(ctx, releaseChannelMediaPendingObject,
		arg.Backoff,
		arg.LastError,
		arg.StorageKey,
		arg.WorkspaceID,
		arg.LeaseToken,
	)
	return err
}

const releaseChannelWSLease = `-- name: ReleaseChannelWSLease :exec
UPDATE channel_installation
SET ws_lease_token      = NULL,
    ws_lease_expires_at = NULL,
    updated_at          = now()
WHERE id = $1
  AND ws_lease_token = $2
`

type ReleaseChannelWSLeaseParams struct {
	ID           pgtype.UUID `json:"id"`
	CurrentToken pgtype.Text `json:"current_token"`
}

// Drops the lease iff we are still the holder.
func (q *Queries) ReleaseChannelWSLease(ctx context.Context, arg ReleaseChannelWSLeaseParams) error {
	_, err := q.db.Exec(ctx, releaseChannelWSLease, arg.ID, arg.CurrentToken)
	return err
}

const resolveChannelChatContextHistoryStart = `-- name: ResolveChannelChatContextHistoryStart :exec
UPDATE channel_chat_context_generation
SET history_start_message_id = $1,
    history_boundary_pending = FALSE
WHERE chat_session_id = $2
  AND revision = $3
  AND history_boundary_pending
`

type ResolveChannelChatContextHistoryStartParams struct {
	HistoryStartMessageID pgtype.Text `json:"history_start_message_id"`
	ChatSessionID         pgtype.UUID `json:"chat_session_id"`
	Revision              int64       `json:"revision"`
}

func (q *Queries) ResolveChannelChatContextHistoryStart(ctx context.Context, arg ResolveChannelChatContextHistoryStartParams) error {
	_, err := q.db.Exec(ctx, resolveChannelChatContextHistoryStart, arg.HistoryStartMessageID, arg.ChatSessionID, arg.Revision)
	return err
}

const retireChannelChatSessionBinding = `-- name: RetireChannelChatSessionBinding :one
UPDATE channel_chat_session_binding
SET retired_at = now(),
    history_end_message_id = $1
WHERE id = $2 AND retired_at IS NULL
RETURNING id, chat_session_id, installation_id, channel_type, channel_chat_id, chat_type, last_message_id, last_thread_id, config, created_at, pending_fresh, context_revision, route_revision, retired_at, history_start_message_id, history_end_message_id, history_boundary_pending
`

type RetireChannelChatSessionBindingParams struct {
	HistoryEndMessageID pgtype.Text `json:"history_end_message_id"`
	ID                  pgtype.UUID `json:"id"`
}

func (q *Queries) RetireChannelChatSessionBinding(ctx context.Context, arg RetireChannelChatSessionBindingParams) (ChannelChatSessionBinding, error) {
	row := q.db.QueryRow(ctx, retireChannelChatSessionBinding, arg.HistoryEndMessageID, arg.ID)
	var i ChannelChatSessionBinding
	err := row.Scan(
		&i.ID,
		&i.ChatSessionID,
		&i.InstallationID,
		&i.ChannelType,
		&i.ChannelChatID,
		&i.ChatType,
		&i.LastMessageID,
		&i.LastThreadID,
		&i.Config,
		&i.CreatedAt,
		&i.PendingFresh,
		&i.ContextRevision,
		&i.RouteRevision,
		&i.RetiredAt,
		&i.HistoryStartMessageID,
		&i.HistoryEndMessageID,
		&i.HistoryBoundaryPending,
	)
	return i, err
}

const setChannelChatContextInitiator = `-- name: SetChannelChatContextInitiator :one
UPDATE channel_chat_context_generation
SET initiator_user_id = $1
WHERE chat_session_id = $2
  AND revision = $3
RETURNING initiator_user_id
`

type SetChannelChatContextInitiatorParams struct {
	InitiatorUserID pgtype.UUID `json:"initiator_user_id"`
	ChatSessionID   pgtype.UUID `json:"chat_session_id"`
	Revision        int64       `json:"revision"`
}

// Snapshots the latest authenticated sender whose durable input belongs to a
// generation. Crash recovery must use this identity rather than the sender of
// a later generation that happened to re-arm the lost debounce timer.
func (q *Queries) SetChannelChatContextInitiator(ctx context.Context, arg SetChannelChatContextInitiatorParams) (pgtype.UUID, error) {
	row := q.db.QueryRow(ctx, setChannelChatContextInitiator, arg.InitiatorUserID, arg.ChatSessionID, arg.Revision)
	var initiator_user_id pgtype.UUID
	err := row.Scan(&initiator_user_id)
	return initiator_user_id, err
}

const setChannelInstallationConfig = `-- name: SetChannelInstallationConfig :exec
UPDATE channel_installation
SET config = $2, updated_at = now()
WHERE id = $1
`

type SetChannelInstallationConfigParams struct {
	ID     pgtype.UUID `json:"id"`
	Config []byte      `json:"config"`
}

// Replaces the whole config blob for one installation. Used by the
// operator backfills (e.g. setting a freshly-fetched bot_union_id) that
// read-modify-write the JSON in Go and persist it back atomically by id.
func (q *Queries) SetChannelInstallationConfig(ctx context.Context, arg SetChannelInstallationConfigParams) error {
	_, err := q.db.Exec(ctx, setChannelInstallationConfig, arg.ID, arg.Config)
	return err
}

const setChannelInstallationStatus = `-- name: SetChannelInstallationStatus :exec
UPDATE channel_installation
SET status = $2, updated_at = now()
WHERE id = $1
`

type SetChannelInstallationStatusParams struct {
	ID     pgtype.UUID `json:"id"`
	Status string      `json:"status"`
}

func (q *Queries) SetChannelInstallationStatus(ctx context.Context, arg SetChannelInstallationStatusParams) error {
	_, err := q.db.Exec(ctx, setChannelInstallationStatus, arg.ID, arg.Status)
	return err
}

const tombstoneChannelMediaPendingObject = `-- name: TombstoneChannelMediaPendingObject :execrows
UPDATE channel_media_pending_object
SET state = 'tombstoned',
    lease_token = NULL,
    lease_expires_at = NULL,
    next_attempt_at = now() + $1::interval,
    -- The pass index lives in its own column: a failed re-delete writes
    -- last_error, so carrying the schedule position there would reset the
    -- walk on every failure and a flaky store could keep the row alive
    -- indefinitely. The delete that got here succeeded, so any previous
    -- failure text is stale.
    tombstone_pass = $2,
    last_error = NULL
WHERE storage_key = $3
  AND workspace_id = $4
  AND lease_token = $5
`

type TombstoneChannelMediaPendingObjectParams struct {
	RedeleteDelay pgtype.Interval `json:"redelete_delay"`
	TombstonePass int32           `json:"tombstone_pass"`
	StorageKey    string          `json:"storage_key"`
	WorkspaceID   pgtype.UUID     `json:"workspace_id"`
	LeaseToken    pgtype.UUID     `json:"lease_token"`
}

// The object was deleted, but the row is KEPT as a tombstone: a PUT the client
// abandoned before the delete may still materialize the object afterwards, and
// no DELETE can be ordered against it. Each due tombstone re-runs the
// reference check and, only if still unreferenced, triggers another idempotent
// delete, so a late materialization is reclaimed by a later pass while an
// object something durably reads is never removed;
// only after the re-delete schedule is exhausted is the row dropped
// (DeleteChannelMediaPendingObject). Lease-token guarded like every other
// settle write; workspace_id explicit per the tenancy rule.
func (q *Queries) TombstoneChannelMediaPendingObject(ctx context.Context, arg TombstoneChannelMediaPendingObjectParams) (int64, error) {
	result, err := q.db.Exec(ctx, tombstoneChannelMediaPendingObject,
		arg.RedeleteDelay,
		arg.TombstonePass,
		arg.StorageKey,
		arg.WorkspaceID,
		arg.LeaseToken,
	)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const updateChannelChatSessionBindingReplyTarget = `-- name: UpdateChannelChatSessionBindingReplyTarget :exec
WITH current_route AS (
    SELECT current_binding.id, current_binding.chat_session_id, current_binding.installation_id, current_binding.channel_type, current_binding.channel_chat_id, current_binding.chat_type, current_binding.last_message_id, current_binding.last_thread_id, current_binding.config, current_binding.created_at, current_binding.pending_fresh, current_binding.context_revision, current_binding.route_revision, current_binding.retired_at, current_binding.history_start_message_id, current_binding.history_end_message_id, current_binding.history_boundary_pending
    FROM channel_chat_session_binding AS current_binding
    WHERE current_binding.chat_session_id = $3
    FOR UPDATE OF current_binding
), closed_previous AS (
    UPDATE channel_chat_session_binding AS previous
    SET history_end_message_id = $1
    FROM current_route AS current
    WHERE current.history_boundary_pending
      AND $1::text IS NOT NULL
      AND previous.installation_id = current.installation_id
      AND previous.channel_chat_id = current.channel_chat_id
      -- Multiple native Slack /new commands can rotate through empty
      -- generations before another public message supplies a platform cursor.
      -- That cursor closes every still-open retired generation.
      AND previous.route_revision < current.route_revision
      AND previous.retired_at IS NOT NULL
      AND previous.history_end_message_id IS NULL
)
UPDATE channel_chat_session_binding AS binding
SET last_message_id = $1,
    last_thread_id  = $2,
    history_start_message_id = CASE
        WHEN binding.history_boundary_pending
          AND $1::text IS NOT NULL
        THEN $1
        ELSE binding.history_start_message_id
    END,
    history_boundary_pending = CASE
        WHEN $1::text IS NOT NULL THEN FALSE
        ELSE binding.history_boundary_pending
    END
FROM current_route
WHERE binding.id = current_route.id
`

type UpdateChannelChatSessionBindingReplyTargetParams struct {
	LastMessageID      pgtype.Text `json:"last_message_id"`
	LastThreadID       pgtype.Text `json:"last_thread_id"`
	ReplyChatSessionID pgtype.UUID `json:"reply_chat_session_id"`
}

// Records the most recent inbound trigger message + thread so the decoupled
// outbound patcher can thread its reply back into the originating topic.
func (q *Queries) UpdateChannelChatSessionBindingReplyTarget(ctx context.Context, arg UpdateChannelChatSessionBindingReplyTargetParams) error {
	_, err := q.db.Exec(ctx, updateChannelChatSessionBindingReplyTarget, arg.LastMessageID, arg.LastThreadID, arg.ReplyChatSessionID)
	return err
}

const updateChannelOutboundCardStatus = `-- name: UpdateChannelOutboundCardStatus :exec
UPDATE channel_outbound_card_message
SET status = $2,
    last_patched_at = now()
WHERE id = $1
`

type UpdateChannelOutboundCardStatusParams struct {
	ID     pgtype.UUID `json:"id"`
	Status string      `json:"status"`
}

func (q *Queries) UpdateChannelOutboundCardStatus(ctx context.Context, arg UpdateChannelOutboundCardStatusParams) error {
	_, err := q.db.Exec(ctx, updateChannelOutboundCardStatus, arg.ID, arg.Status)
	return err
}

const upsertChannelInstallation = `-- name: UpsertChannelInstallation :one


INSERT INTO channel_installation (
    workspace_id, agent_id, channel_type, config, installer_user_id
) VALUES (
    $1, $2, $3, $4, $5
)
ON CONFLICT (workspace_id, agent_id, channel_type) DO UPDATE SET
    channel_type      = EXCLUDED.channel_type,
    config            = EXCLUDED.config,
    installer_user_id = EXCLUDED.installer_user_id,
    status            = 'active',
    installed_at      = now(),
    updated_at        = now()
RETURNING id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at
`

type UpsertChannelInstallationParams struct {
	WorkspaceID     pgtype.UUID `json:"workspace_id"`
	AgentID         pgtype.UUID `json:"agent_id"`
	ChannelType     string      `json:"channel_type"`
	Config          []byte      `json:"config"`
	InstallerUserID pgtype.UUID `json:"installer_user_id"`
}

// Platform-agnostic inbound channel queries (MUL-3515). These operate on
// the channel_* tables created in migration 124. Each installation carries
// a `channel_type` discriminator and a JSONB `config` blob for
// platform-specific identifiers/credentials; the cross-platform columns
// stay flat. The Go layer owns building/parsing config — these queries
// treat it as opaque JSON except for the routing index on config->>'app_id'.
//
// No foreign keys exist on these tables (MUL-3515 §4): the integrity the
// old composite FKs enforced (binding workspace matches installation;
// binding dies with membership / chat_session) is maintained in the
// application layer via the membership check in the inbound identity step
// and the *DeleteChannel*BindingsBy* cleanup queries below.
// =====================
// channel_installation
// =====================
// Install / re-install path. `config` is the opaque per-channel JSONB the
// Go layer assembles (for feishu: app_id, app_secret_encrypted, tenant_key,
// bot_open_id, bot_union_id, region). Re-installing the same agent on the
// same channel_type replaces the whole config and forces status back to
// 'active'. The conflict key is (workspace_id, agent_id, channel_type) so an
// agent may hold one installation per channel_type (feishu + slack + ...)
// without one install clobbering another. The WS lease is intentionally NOT
// reset here — the inbound hub owns lease lifecycle.
func (q *Queries) UpsertChannelInstallation(ctx context.Context, arg UpsertChannelInstallationParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, upsertChannelInstallation,
		arg.WorkspaceID,
		arg.AgentID,
		arg.ChannelType,
		arg.Config,
		arg.InstallerUserID,
	)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}

const upsertChannelInstallationByAppID = `-- name: UpsertChannelInstallationByAppID :one
INSERT INTO channel_installation (
    workspace_id, agent_id, channel_type, config, installer_user_id
) VALUES (
    $1, $2, $3, $4, $5
)
ON CONFLICT (channel_type, (config ->> 'app_id')) DO UPDATE SET
    agent_id          = EXCLUDED.agent_id,
    config            = EXCLUDED.config,
    installer_user_id = EXCLUDED.installer_user_id,
    status            = 'active',
    installed_at      = now(),
    updated_at        = now()
WHERE channel_installation.workspace_id = EXCLUDED.workspace_id
RETURNING id, workspace_id, agent_id, channel_type, config, status, ws_lease_token, ws_lease_expires_at, installer_user_id, installed_at, created_at, updated_at
`

type UpsertChannelInstallationByAppIDParams struct {
	WorkspaceID     pgtype.UUID `json:"workspace_id"`
	AgentID         pgtype.UUID `json:"agent_id"`
	ChannelType     string      `json:"channel_type"`
	Config          []byte      `json:"config"`
	InstallerUserID pgtype.UUID `json:"installer_user_id"`
}

// Team-keyed install / re-install for channels whose natural identity is the
// platform workspace, not the (agent) pairing. Slack: one Slack workspace
// (team_id, stored as config->>'app_id') maps to exactly one installation, so
// re-connecting it — even to represent a DIFFERENT agent in the SAME Multica
// workspace — UPDATES the existing row (moving agent_id) instead of colliding
// with the (channel_type, app_id) unique index. Contrast UpsertChannelInstallation,
// whose conflict key is (workspace_id, agent_id, channel_type): right for Feishu
// (one app per agent), wrong for Slack.
//
// The `WHERE channel_installation.workspace_id = EXCLUDED.workspace_id` fences
// the conflict update to the SAME Multica workspace: a team already owned by a
// DIFFERENT workspace updates no row and RETURNING is empty (pgx.ErrNoRows),
// which the caller maps to ErrTeamOwnedByAnotherWorkspace. This is the ATOMIC
// cross-workspace guard — a plain SELECT before the upsert cannot stop two
// workspaces racing to OAuth the same team (both read no rows, then one inserts
// and the other's conflict-update would silently steal it). A re-connect that
// would move the team to an agent already holding a different Slack install in
// the same workspace still trips the (workspace_id, agent_id, channel_type)
// unique constraint — a genuine conflict the OAuth callback turns into a redirect.
func (q *Queries) UpsertChannelInstallationByAppID(ctx context.Context, arg UpsertChannelInstallationByAppIDParams) (ChannelInstallation, error) {
	row := q.db.QueryRow(ctx, upsertChannelInstallationByAppID,
		arg.WorkspaceID,
		arg.AgentID,
		arg.ChannelType,
		arg.Config,
		arg.InstallerUserID,
	)
	var i ChannelInstallation
	err := row.Scan(
		&i.ID,
		&i.WorkspaceID,
		&i.AgentID,
		&i.ChannelType,
		&i.Config,
		&i.Status,
		&i.WsLeaseToken,
		&i.WsLeaseExpiresAt,
		&i.InstallerUserID,
		&i.InstalledAt,
		&i.CreatedAt,
		&i.UpdatedAt,
	)
	return i, err
}