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

package db

import (
	"context"

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

const addDelegatedSubscriber = `-- name: AddDelegatedSubscriber :execrows
WITH RECURSIVE ancestors(node_id, parent_id, depth) AS (
    SELECT root.id, root.parent_issue_id, 0 FROM issue root WHERE root.id = $1
    UNION ALL
    SELECT i.id, i.parent_issue_id, a.depth + 1
    FROM issue i JOIN ancestors a ON i.id = a.parent_id
),
active_member AS (
    SELECT m.user_id FROM member m
    WHERE m.user_id = $2 AND m.workspace_id = $4
    FOR SHARE
)
INSERT INTO issue_subscriber (issue_id, user_type, user_id, reason)
SELECT $1, 'member', am.user_id, $3
FROM active_member am
WHERE NOT EXISTS (
    SELECT 1
    FROM issue_subscriber s
    JOIN ancestors a ON a.node_id = s.issue_id
    WHERE s.user_type = 'member' AND s.user_id = $2
      AND s.unsubscribed_at IS NOT NULL
      AND (a.depth = 0 OR s.opt_out_scope = 'subtree')
)
ON CONFLICT (issue_id, user_type, user_id) DO UPDATE
SET reason = EXCLUDED.reason
WHERE issue_subscriber.unsubscribed_at IS NULL
  AND issue_subscriber.reason = 'delegated'
  AND EXCLUDED.reason <> 'delegated'
`

type AddDelegatedSubscriberParams struct {
	IssueID     pgtype.UUID `json:"issue_id"`
	UserID      pgtype.UUID `json:"user_id"`
	Reason      string      `json:"reason"`
	WorkspaceID pgtype.UUID `json:"workspace_id"`
}

// The delegated rule's write (MUL-5483). Eligibility and insert are ONE
// statement so they share a snapshot; callers must hold LockSubscriberWrites
// for the same (workspace, user), which is what makes that snapshot stable.
//
// Eligibility is two conditions the previous version checked in separate
// round trips:
//
//  1. active_member — the originator must STILL be a workspace member.
//     originator_user_id is stamped when the task is queued and never
//     revisited, so a revoked member's still-running tasks would otherwise
//     keep filing ghost subscribers. FOR SHARE also blocks a concurrent
//     DELETE of that member row for the rest of this transaction, so the
//     check cannot go stale between here and the insert.
//
//  2. NOT EXISTS (...) — the ancestor opt-out walk from HasAncestorOptOut,
//     inlined for the same reason: a subtree tombstone committed between a
//     separate check and this insert would silently undo the user's opt-out
//     on every child the agent files next.
//
// ON CONFLICT keeps AddIssueSubscriber's two rules: never resurrect a
// tombstone, and upgrade an active 'delegated' row when the user becomes
// directly involved.
func (q *Queries) AddDelegatedSubscriber(ctx context.Context, arg AddDelegatedSubscriberParams) (int64, error) {
	result, err := q.db.Exec(ctx, addDelegatedSubscriber,
		arg.IssueID,
		arg.UserID,
		arg.Reason,
		arg.WorkspaceID,
	)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const addIssueSubscriber = `-- name: AddIssueSubscriber :execrows
INSERT INTO issue_subscriber (issue_id, user_type, user_id, reason)
VALUES ($1, $2, $3, $4)
ON CONFLICT (issue_id, user_type, user_id) DO UPDATE
SET reason = EXCLUDED.reason
WHERE issue_subscriber.unsubscribed_at IS NULL
  AND issue_subscriber.reason = 'delegated'
  AND EXCLUDED.reason <> 'delegated'
`

type AddIssueSubscriberParams struct {
	IssueID  pgtype.UUID `json:"issue_id"`
	UserType string      `json:"user_type"`
	UserID   pgtype.UUID `json:"user_id"`
	Reason   string      `json:"reason"`
}

// Auto-subscribe path (creator / assignee / commenter / mentioned / autopilot /
// delegated).
//
// Two behaviors are load-bearing here:
//
//  1. A tombstoned row is NEVER resurrected. The WHERE on the DO UPDATE fails
//     for an opted-out row, which degrades to DO NOTHING — so unsubscribe still
//     sticks on a tree an agent keeps adding to (MUL-5483).
//
//  2. An ACTIVE 'delegated' row is upgraded when the user becomes directly
//     involved (assigned / mentioned / commented). Without this the reason
//     stays 'delegated' forever and someone who is now a real participant keeps
//     getting the reduced delivery tier.
//
// Returns rows affected so the caller only broadcasts subscriber:added when an
// active subscription actually changed. Publishing unconditionally made the
// frontend insert a subscriber the DB had refused to write.
func (q *Queries) AddIssueSubscriber(ctx context.Context, arg AddIssueSubscriberParams) (int64, error) {
	result, err := q.db.Exec(ctx, addIssueSubscriber,
		arg.IssueID,
		arg.UserType,
		arg.UserID,
		arg.Reason,
	)
	if err != nil {
		return 0, err
	}
	return result.RowsAffected(), nil
}

const deleteSubscriptionsByMember = `-- name: DeleteSubscriptionsByMember :exec
DELETE FROM issue_subscriber s
USING issue i
WHERE s.issue_id = i.id
  AND i.workspace_id = $1
  AND s.user_type = 'member'
  AND s.user_id = $2
`

type DeleteSubscriptionsByMemberParams struct {
	WorkspaceID pgtype.UUID `json:"workspace_id"`
	UserID      pgtype.UUID `json:"user_id"`
}

// Drop a departing member's subscriptions across the workspace, in the same tx
// as the member-row delete (MUL-5483 review round 7).
//
// Same application-layer cleanup rule the surrounding revoke path already
// applies to channel bindings and invocation grants: issue_subscriber carries
// no FK, so nothing removes these implicitly. Without it a revoked member keeps
// accruing inbox rows, and re-inviting them silently restores visibility of
// every issue they used to watch.
//
// A hard DELETE, not a tombstone: a tombstone means "this person chose to
// leave this issue" and would suppress re-subscription if they rejoin, which
// is not what a workspace revoke means.
func (q *Queries) DeleteSubscriptionsByMember(ctx context.Context, arg DeleteSubscriptionsByMemberParams) error {
	_, err := q.db.Exec(ctx, deleteSubscriptionsByMember, arg.WorkspaceID, arg.UserID)
	return err
}

const hasAncestorOptOut = `-- name: HasAncestorOptOut :one
WITH RECURSIVE ancestors(node_id, parent_id, depth) AS (
    SELECT root.id, root.parent_issue_id, 0 FROM issue root WHERE root.id = $1
    UNION ALL
    SELECT i.id, i.parent_issue_id, a.depth + 1 FROM issue i JOIN ancestors a ON i.id = a.parent_id
)
SELECT EXISTS(
    SELECT 1
    FROM issue_subscriber s
    JOIN ancestors a ON a.node_id = s.issue_id
    WHERE s.user_type = $2 AND s.user_id = $3
      AND s.unsubscribed_at IS NOT NULL
      AND (a.depth = 0 OR s.opt_out_scope = 'subtree')
) AS opted_out
`

type HasAncestorOptOutParams struct {
	ID       pgtype.UUID `json:"id"`
	UserType string      `json:"user_type"`
	UserID   pgtype.UUID `json:"user_id"`
}

// True when the user has opted out in a way that should keep them off THIS
// issue.
//
// Two distinct cases, and the distinction is the whole point of opt_out_scope:
//
//   - a tombstone on this issue itself, at any scope — they left this issue;
//   - a 'subtree'-scoped tombstone on a STRICT ancestor — they left a tree this
//     issue belongs to, so a child created an hour later is still covered.
//
// An 'issue'-scoped tombstone on an ancestor deliberately does NOT match: the
// user declined that one issue, not everything the agent files beneath it.
func (q *Queries) HasAncestorOptOut(ctx context.Context, arg HasAncestorOptOutParams) (bool, error) {
	row := q.db.QueryRow(ctx, hasAncestorOptOut, arg.ID, arg.UserType, arg.UserID)
	var opted_out bool
	err := row.Scan(&opted_out)
	return opted_out, err
}

const isIssueSubscriber = `-- name: IsIssueSubscriber :one
SELECT EXISTS(
    SELECT 1 FROM issue_subscriber
    WHERE issue_id = $1 AND user_type = $2 AND user_id = $3
      AND unsubscribed_at IS NULL
) AS subscribed
`

type IsIssueSubscriberParams struct {
	IssueID  pgtype.UUID `json:"issue_id"`
	UserType string      `json:"user_type"`
	UserID   pgtype.UUID `json:"user_id"`
}

func (q *Queries) IsIssueSubscriber(ctx context.Context, arg IsIssueSubscriberParams) (bool, error) {
	row := q.db.QueryRow(ctx, isIssueSubscriber, arg.IssueID, arg.UserType, arg.UserID)
	var subscribed bool
	err := row.Scan(&subscribed)
	return subscribed, err
}

const listIssueSubscribers = `-- name: ListIssueSubscribers :many
SELECT issue_id, user_type, user_id, reason, created_at, unsubscribed_at, opt_out_scope FROM issue_subscriber
WHERE issue_id = $1 AND unsubscribed_at IS NULL
ORDER BY created_at
`

func (q *Queries) ListIssueSubscribers(ctx context.Context, issueID pgtype.UUID) ([]IssueSubscriber, error) {
	rows, err := q.db.Query(ctx, listIssueSubscribers, issueID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []IssueSubscriber{}
	for rows.Next() {
		var i IssueSubscriber
		if err := rows.Scan(
			&i.IssueID,
			&i.UserType,
			&i.UserID,
			&i.Reason,
			&i.CreatedAt,
			&i.UnsubscribedAt,
			&i.OptOutScope,
		); err != nil {
			return nil, err
		}
		items = append(items, i)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}

const lockActiveMember = `-- name: LockActiveMember :one
SELECT id FROM member
WHERE user_id = $1 AND workspace_id = $2
FOR SHARE
`

type LockActiveMemberParams struct {
	UserID      pgtype.UUID `json:"user_id"`
	WorkspaceID pgtype.UUID `json:"workspace_id"`
}

// Re-assert workspace membership INSIDE a serialized transaction, holding the
// row so a concurrent revoke cannot complete underneath the caller
// (MUL-5483 review round 8).
//
// The subtree-unsubscribe handler validates membership from its own MVCC
// snapshot before it opens a transaction, which is only a statement about the
// past. A revoke that commits in between clears the user's subscriptions and
// deletes the member row, and the handler would then write a fresh tombstone
// behind it — leaving an opt-out that outlives the membership and is inherited
// if the person is ever re-invited.
func (q *Queries) LockActiveMember(ctx context.Context, arg LockActiveMemberParams) (pgtype.UUID, error) {
	row := q.db.QueryRow(ctx, lockActiveMember, arg.UserID, arg.WorkspaceID)
	var id pgtype.UUID
	err := row.Scan(&id)
	return id, err
}

const lockSubscriberWrites = `-- name: LockSubscriberWrites :exec
SELECT pg_advisory_xact_lock(
    hashtext(($1::uuid)::text),
    hashtext(($2::uuid)::text)
)
`

type LockSubscriberWritesParams struct {
	WorkspaceID pgtype.UUID `json:"workspace_id"`
	UserID      pgtype.UUID `json:"user_id"`
}

// Transaction-scoped serialization boundary for (workspace, user) subscriber
// state (MUL-5483 review round 7).
//
// Three paths race over the same question — "should this user be an active
// watcher?" — and each one is a check in one statement followed by a write in
// another:
//
//   - the delegated rule: is the user a member / not opted out, then insert;
//   - subtree unsubscribe: tombstone the tree, which must cover children the
//     agent files a moment later;
//   - member revoke: delete the member row and their subscriptions.
//
// Row locks cannot close this. The interleaving that breaks the escape hatch
// inserts a subscriber for an issue that did not exist when the opt-out was
// written, so there is no row to lock — a phantom, which under READ COMMITTED
// needs an explicit lock object. Every path above takes THIS lock first, so
// their lock ordering is identical and they cannot deadlock against each other.
//
// Keyed on (workspace, user) rather than the issue: an opt-out is about a
// person and a tree, and the tree's membership is exactly what is changing.
//
// The key is derived from the UUID VALUE, not from however the caller happened
// to spell it. ::uuid parses the input and the outer ::text renders PostgreSQL's
// canonical lowercase form, so 'AB…' and 'ab…' — the same UUID everywhere else
// in this file, and to every membership query — also produce the same lock.
// Hashing the raw string instead let an uppercase request take a DIFFERENT lock
// from the canonical holder, which silently reopened the very race this lock
// exists to close. Casting at the DB boundary keeps that guarantee even if a
// future caller forgets to canonicalize.
func (q *Queries) LockSubscriberWrites(ctx context.Context, arg LockSubscriberWritesParams) error {
	_, err := q.db.Exec(ctx, lockSubscriberWrites, arg.WorkspaceID, arg.UserID)
	return err
}

const removeIssueSubscriber = `-- name: RemoveIssueSubscriber :exec
UPDATE issue_subscriber
SET unsubscribed_at = now(), opt_out_scope = 'issue'
WHERE issue_id = $1 AND user_type = $2 AND user_id = $3 AND unsubscribed_at IS NULL
`

type RemoveIssueSubscriberParams struct {
	IssueID  pgtype.UUID `json:"issue_id"`
	UserType string      `json:"user_type"`
	UserID   pgtype.UUID `json:"user_id"`
}

// Leave THIS issue only. Tombstone rather than delete, so auto-subscribe rules
// can tell "never subscribed" (no row) from "chose to leave" (row with
// unsubscribed_at). scope='issue' keeps the opt-out from reaching descendants:
// future children of this issue are still allowed to subscribe the user.
func (q *Queries) RemoveIssueSubscriber(ctx context.Context, arg RemoveIssueSubscriberParams) error {
	_, err := q.db.Exec(ctx, removeIssueSubscriber, arg.IssueID, arg.UserType, arg.UserID)
	return err
}

const subscribeToIssueExplicitly = `-- name: SubscribeToIssueExplicitly :exec
INSERT INTO issue_subscriber (issue_id, user_type, user_id, reason)
VALUES ($1, $2, $3, $4)
ON CONFLICT (issue_id, user_type, user_id)
DO UPDATE SET unsubscribed_at = NULL, opt_out_scope = NULL, reason = EXCLUDED.reason
`

type SubscribeToIssueExplicitlyParams struct {
	IssueID  pgtype.UUID `json:"issue_id"`
	UserType string      `json:"user_type"`
	UserID   pgtype.UUID `json:"user_id"`
	Reason   string      `json:"reason"`
}

// Explicit user action (the Subscribe button). Unlike the rule-driven path this
// CLEARS an existing opt-out tombstone and its scope: the user is overriding
// their own earlier unsubscribe, which is the one thing that should bring them
// back.
func (q *Queries) SubscribeToIssueExplicitly(ctx context.Context, arg SubscribeToIssueExplicitlyParams) error {
	_, err := q.db.Exec(ctx, subscribeToIssueExplicitly,
		arg.IssueID,
		arg.UserType,
		arg.UserID,
		arg.Reason,
	)
	return err
}

const unsubscribeFromIssueSubtree = `-- name: UnsubscribeFromIssueSubtree :many
WITH RECURSIVE subtree(node_id) AS (
    SELECT root.id FROM issue root WHERE root.id = $1
    UNION ALL
    SELECT i.id FROM issue i JOIN subtree s ON i.parent_issue_id = s.node_id
),
retire_descendants AS (
    UPDATE issue_subscriber sub
    SET unsubscribed_at = now(), opt_out_scope = 'subtree'
    WHERE sub.issue_id IN (SELECT node_id FROM subtree WHERE node_id <> $1)
      AND sub.user_type = $2 AND sub.user_id = $3
      AND sub.unsubscribed_at IS NULL
    RETURNING sub.issue_id
),
retire_root AS (
    INSERT INTO issue_subscriber (issue_id, user_type, user_id, reason, unsubscribed_at, opt_out_scope)
    VALUES ($1, $2, $3, 'manual', now(), 'subtree')
    ON CONFLICT (issue_id, user_type, user_id)
    DO UPDATE SET unsubscribed_at = now(), opt_out_scope = 'subtree'
    RETURNING issue_id
)
SELECT issue_id FROM retire_descendants
UNION ALL
SELECT issue_id FROM retire_root
`

type UnsubscribeFromIssueSubtreeParams struct {
	ID       pgtype.UUID `json:"id"`
	UserType string      `json:"user_type"`
	UserID   pgtype.UUID `json:"user_id"`
}

// Leave an issue AND every descendant in one action. An agent-built tree is
// the unit a user actually wants to stop watching; leaving 30 sub-issues one
// at a time is not a real escape hatch.
//
// The root gets an UPSERTED tombstone rather than a conditional UPDATE, because
// "I don't want this tree" has to persist even when the user holds no
// subscription on the root itself — otherwise the opt-out records nothing and
// the next child the agent files re-subscribes them. That root tombstone is
// also what covers FUTURE descendants: HasAncestorOptOut walks up to it and
// honors it because its scope is 'subtree'.
//
// Returns every issue id it actually tombstoned so the caller can broadcast one
// subscriber:removed per issue; publishing only the root left other open tabs
// showing a stale subscription on the children.
func (q *Queries) UnsubscribeFromIssueSubtree(ctx context.Context, arg UnsubscribeFromIssueSubtreeParams) ([]pgtype.UUID, error) {
	rows, err := q.db.Query(ctx, unsubscribeFromIssueSubtree, arg.ID, arg.UserType, arg.UserID)
	if err != nil {
		return nil, err
	}
	defer rows.Close()
	items := []pgtype.UUID{}
	for rows.Next() {
		var issue_id pgtype.UUID
		if err := rows.Scan(&issue_id); err != nil {
			return nil, err
		}
		items = append(items, issue_id)
	}
	if err := rows.Err(); err != nil {
		return nil, err
	}
	return items, nil
}