//! Integration tests for the dead-letter admin queries in
//! `repo::crawler`: listing dead jobs with manga/chapter context and the
//! scoped requeue (all / per-manga / single) used by the admin dashboard.

use mangalord::repo::crawler::{self, RequeueScope};
use serde_json::json;
use sqlx::PgPool;
use uuid::Uuid;

/// Seed a manga + chapter and return their ids.
async fn seed_chapter(pool: &PgPool, title: &str, number: i32) -> (Uuid, Uuid) {
    let manga_id = Uuid::new_v4();
    let chapter_id = Uuid::new_v4();
    sqlx::query("INSERT INTO mangas (id, title) VALUES ($1, $2)")
        .bind(manga_id)
        .bind(title)
        .execute(pool)
        .await
        .unwrap();
    sqlx::query("INSERT INTO chapters (id, manga_id, number) VALUES ($1, $2, $3)")
        .bind(chapter_id)
        .bind(manga_id)
        .bind(number)
        .execute(pool)
        .await
        .unwrap();
    (manga_id, chapter_id)
}

/// Insert a crawler_jobs row in a given state for a chapter-content job.
async fn insert_job(pool: &PgPool, chapter_id: Uuid, state: &str, attempts: i32) -> Uuid {
    let id = Uuid::new_v4();
    let payload = json!({
        "kind": "sync_chapter_content",
        "source_id": "target",
        "chapter_id": chapter_id,
        "source_chapter_key": "k",
    });
    sqlx::query(
        "INSERT INTO crawler_jobs (id, payload, state, attempts, last_error) \
         VALUES ($1, $2, $3, $4, 'boom')",
    )
    .bind(id)
    .bind(payload)
    .bind(state)
    .bind(attempts)
    .execute(pool)
    .await
    .unwrap();
    id
}

async fn state_of(pool: &PgPool, id: Uuid) -> String {
    sqlx::query_scalar::<_, String>("SELECT state FROM crawler_jobs WHERE id = $1")
        .bind(id)
        .fetch_one(pool)
        .await
        .unwrap()
}

#[sqlx::test(migrations = "./migrations")]
async fn list_dead_jobs_returns_context_and_total(pool: PgPool) {
    let (_m, c1) = seed_chapter(&pool, "Naruto", 700).await;
    insert_job(&pool, c1, "dead", 5).await;
    // A non-dead job must not appear.
    let (_m2, c2) = seed_chapter(&pool, "Bleach", 1).await;
    insert_job(&pool, c2, "pending", 0).await;

    let (items, total) = crawler::list_dead_jobs(&pool, None, 50, 0).await.unwrap();
    assert_eq!(total, 1);
    assert_eq!(items.len(), 1);
    let row = &items[0];
    assert_eq!(row.manga_title.as_deref(), Some("Naruto"));
    assert_eq!(row.chapter_number, Some(700));
    assert_eq!(row.attempts, 5);
    assert_eq!(row.last_error.as_deref(), Some("boom"));
}

#[sqlx::test(migrations = "./migrations")]
async fn list_dead_jobs_filters_by_title_search(pool: PgPool) {
    let (_m, c1) = seed_chapter(&pool, "Naruto", 700).await;
    insert_job(&pool, c1, "dead", 5).await;
    let (_m2, c2) = seed_chapter(&pool, "One Piece", 1).await;
    insert_job(&pool, c2, "dead", 5).await;

    let (items, total) = crawler::list_dead_jobs(&pool, Some("piece"), 50, 0)
        .await
        .unwrap();
    assert_eq!(total, 1);
    assert_eq!(items[0].manga_title.as_deref(), Some("One Piece"));
}

#[sqlx::test(migrations = "./migrations")]
async fn requeue_all_resets_dead_jobs_to_pending(pool: PgPool) {
    let (_m, c1) = seed_chapter(&pool, "A", 1).await;
    let (_m2, c2) = seed_chapter(&pool, "B", 1).await;
    let j1 = insert_job(&pool, c1, "dead", 5).await;
    let j2 = insert_job(&pool, c2, "dead", 5).await;

    let n = crawler::requeue_dead_jobs(&pool, RequeueScope::All)
        .await
        .unwrap();
    assert_eq!(n, 2);
    assert_eq!(state_of(&pool, j1).await, "pending");
    assert_eq!(state_of(&pool, j2).await, "pending");
    let attempts: i32 = sqlx::query_scalar("SELECT attempts FROM crawler_jobs WHERE id = $1")
        .bind(j1)
        .fetch_one(&pool)
        .await
        .unwrap();
    assert_eq!(attempts, 0, "attempts reset on requeue");
}

#[sqlx::test(migrations = "./migrations")]
async fn requeue_by_manga_scopes_to_that_manga(pool: PgPool) {
    let (m1, c1) = seed_chapter(&pool, "A", 1).await;
    let (_m2, c2) = seed_chapter(&pool, "B", 1).await;
    let j1 = insert_job(&pool, c1, "dead", 5).await;
    let j2 = insert_job(&pool, c2, "dead", 5).await;

    let n = crawler::requeue_dead_jobs(&pool, RequeueScope::Manga(m1))
        .await
        .unwrap();
    assert_eq!(n, 1);
    assert_eq!(state_of(&pool, j1).await, "pending");
    assert_eq!(state_of(&pool, j2).await, "dead", "other manga untouched");
}

#[sqlx::test(migrations = "./migrations")]
async fn requeue_single_job(pool: PgPool) {
    let (_m, c1) = seed_chapter(&pool, "A", 1).await;
    let (_m2, c2) = seed_chapter(&pool, "B", 1).await;
    let j1 = insert_job(&pool, c1, "dead", 5).await;
    let j2 = insert_job(&pool, c2, "dead", 5).await;

    let n = crawler::requeue_dead_jobs(&pool, RequeueScope::Job(j1))
        .await
        .unwrap();
    assert_eq!(n, 1);
    assert_eq!(state_of(&pool, j1).await, "pending");
    assert_eq!(state_of(&pool, j2).await, "dead");
}

#[sqlx::test(migrations = "./migrations")]
async fn requeue_skips_dead_when_live_job_exists_for_same_chapter(pool: PgPool) {
    let (_m, c1) = seed_chapter(&pool, "A", 1).await;
    let dead = insert_job(&pool, c1, "dead", 5).await;
    // A live pending job for the SAME chapter already exists.
    insert_job(&pool, c1, "pending", 0).await;

    let n = crawler::requeue_dead_jobs(&pool, RequeueScope::All)
        .await
        .unwrap();
    assert_eq!(n, 0, "must not resurrect a dead job that has a live counterpart");
    assert_eq!(state_of(&pool, dead).await, "dead");
}

#[sqlx::test(migrations = "./migrations")]
async fn job_state_counts_groups_by_state(pool: PgPool) {
    let (_m, c1) = seed_chapter(&pool, "A", 1).await;
    let (_m2, c2) = seed_chapter(&pool, "B", 1).await;
    let (_m3, c3) = seed_chapter(&pool, "C", 1).await;
    insert_job(&pool, c1, "pending", 0).await;
    insert_job(&pool, c2, "dead", 5).await;
    insert_job(&pool, c3, "dead", 5).await;

    let (pending, running, dead) = crawler::job_state_counts(&pool).await.unwrap();
    assert_eq!(pending, 1);
    assert_eq!(running, 0);
    assert_eq!(dead, 2);
}