//! Integration tests for the AI-analysis enqueue wiring: chapter upload
//! enqueues `analyze_page` jobs, and the admin backfill / force-reanalyze
//! endpoints. All gated on `analysis_enabled` (the `harness_with_analysis`
//! variant turns it on; the default harness leaves it off → 503).

mod common;

use axum::http::StatusCode;
use axum::Router;
use serde_json::json;
use sqlx::PgPool;
use tower::ServiceExt;

use mangalord::repo;

async fn seed_admin(pool: &PgPool, app: &Router) -> String {
    let (username, cookie) = common::register_user(app).await;
    let u = repo::user::find_by_username(pool, &username)
        .await
        .unwrap()
        .unwrap();
    repo::user::set_is_admin_unchecked(pool, u.id, true)
        .await
        .unwrap();
    cookie
}

/// Seed a manga → chapter with `n` pages directly in the DB, returning the
/// page ids. Used by the backfill tests (no upload round-trip needed).
async fn seed_pages(pool: &PgPool, n: i32) -> Vec<uuid::Uuid> {
    let manga_id: uuid::Uuid =
        sqlx::query_scalar("INSERT INTO mangas (title) VALUES ('M') RETURNING id")
            .fetch_one(pool)
            .await
            .unwrap();
    let chapter_id: uuid::Uuid = sqlx::query_scalar(
        "INSERT INTO chapters (manga_id, number) VALUES ($1, 1) RETURNING id",
    )
    .bind(manga_id)
    .fetch_one(pool)
    .await
    .unwrap();
    let mut ids = Vec::new();
    for i in 1..=n {
        let id: uuid::Uuid = sqlx::query_scalar(
            "INSERT INTO pages (chapter_id, page_number, storage_key, content_type) \
             VALUES ($1, $2, $3, 'image/png') RETURNING id",
        )
        .bind(chapter_id)
        .bind(i)
        .bind(format!("k/{i}.png"))
        .fetch_one(pool)
        .await
        .unwrap();
        ids.push(id);
    }
    ids
}

async fn analyze_job_count(pool: &PgPool) -> i64 {
    sqlx::query_scalar(
        "SELECT COUNT(*) FROM crawler_jobs WHERE payload->>'kind' = 'analyze_page'",
    )
    .fetch_one(pool)
    .await
    .unwrap()
}

#[sqlx::test(migrations = "./migrations")]
async fn chapter_upload_enqueues_one_analysis_job_per_page(pool: PgPool) {
    let h = common::harness_with_analysis(pool.clone());
    let (_user, cookie) = common::register_user(&h.app).await;
    let manga_id = common::seed_manga_via_api(&h.app, &cookie, "Uploaded").await;

    let resp = h
        .app
        .clone()
        .oneshot(common::post_multipart_with_cookie(
            &format!("/api/v1/mangas/{manga_id}/chapters"),
            common::MultipartBuilder::new()
                .add_json("metadata", json!({ "number": 1, "title": "Ch 1" }))
                .add_file("page", "p1.png", "image/png", &common::fake_png_bytes())
                .add_file("page", "p2.png", "image/png", &common::fake_png_bytes()),
            &cookie,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::CREATED);

    assert_eq!(analyze_job_count(&pool).await, 2);
}

#[sqlx::test(migrations = "./migrations")]
async fn chapter_upload_does_not_enqueue_when_analysis_disabled(pool: PgPool) {
    // Default harness has analysis_enabled = false.
    let h = common::harness(pool.clone());
    let (_user, cookie) = common::register_user(&h.app).await;
    let manga_id = common::seed_manga_via_api(&h.app, &cookie, "Uploaded").await;

    let resp = h
        .app
        .clone()
        .oneshot(common::post_multipart_with_cookie(
            &format!("/api/v1/mangas/{manga_id}/chapters"),
            common::MultipartBuilder::new()
                .add_json("metadata", json!({ "number": 1 }))
                .add_file("page", "p1.png", "image/png", &common::fake_png_bytes()),
            &cookie,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::CREATED);
    assert_eq!(analyze_job_count(&pool).await, 0);
}

#[sqlx::test(migrations = "./migrations")]
async fn reenqueue_is_forbidden_for_non_admin(pool: PgPool) {
    let h = common::harness_with_analysis(pool.clone());
    let (_user, cookie) = common::register_user(&h.app).await;

    let resp = h
        .app
        .clone()
        .oneshot(common::post_json_with_cookie(
            "/api/v1/admin/analysis/reenqueue",
            json!({}),
            &cookie,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::FORBIDDEN);
}

#[sqlx::test(migrations = "./migrations")]
async fn reenqueue_returns_503_when_analysis_disabled(pool: PgPool) {
    let h = common::harness(pool.clone()); // analysis disabled
    let cookie = seed_admin(&pool, &h.app).await;

    let resp = h
        .app
        .clone()
        .oneshot(common::post_json_with_cookie(
            "/api/v1/admin/analysis/reenqueue",
            json!({}),
            &cookie,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::SERVICE_UNAVAILABLE);
}

#[sqlx::test(migrations = "./migrations")]
async fn reenqueue_backfills_existing_pages(pool: PgPool) {
    let h = common::harness_with_analysis(pool.clone());
    let cookie = seed_admin(&pool, &h.app).await;
    seed_pages(&pool, 3).await;

    let resp = h
        .app
        .clone()
        .oneshot(common::post_json_with_cookie(
            "/api/v1/admin/analysis/reenqueue",
            json!({ "only_unanalyzed": true }),
            &cookie,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::OK);
    let body = common::body_json(resp).await;
    assert_eq!(body["enqueued"], 3);
    assert_eq!(analyze_job_count(&pool).await, 3);

    // Idempotent: a second call enqueues nothing (pending jobs already exist).
    let resp2 = h
        .app
        .clone()
        .oneshot(common::post_json_with_cookie(
            "/api/v1/admin/analysis/reenqueue",
            json!({ "only_unanalyzed": true }),
            &cookie,
        ))
        .await
        .unwrap();
    let body2 = common::body_json(resp2).await;
    assert_eq!(body2["enqueued"], 0);
    assert_eq!(analyze_job_count(&pool).await, 3);
}

#[sqlx::test(migrations = "./migrations")]
async fn reenqueue_only_unanalyzed_skips_done_pages(pool: PgPool) {
    use mangalord::domain::page_analysis::{SafetyFlag, VisionAnalysis};

    let h = common::harness_with_analysis(pool.clone());
    let cookie = seed_admin(&pool, &h.app).await;
    let ids = seed_pages(&pool, 2).await;

    // Mark the first page as already analyzed.
    repo::page_analysis::persist_analysis(
        &pool,
        ids[0],
        &VisionAnalysis {
            ocr_results: vec![],
            tagging_results: vec![],
            scene_description: String::new(),
            safety_flag: SafetyFlag::default(),
        },
        "m",
    )
    .await
    .unwrap();

    let resp = h
        .app
        .clone()
        .oneshot(common::post_json_with_cookie(
            "/api/v1/admin/analysis/reenqueue",
            json!({ "only_unanalyzed": true }),
            &cookie,
        ))
        .await
        .unwrap();
    let body = common::body_json(resp).await;
    assert_eq!(body["enqueued"], 1, "only the un-analyzed page is enqueued");
}

#[sqlx::test(migrations = "./migrations")]
async fn force_analyze_page_enqueues_with_force_flag(pool: PgPool) {
    let h = common::harness_with_analysis(pool.clone());
    let cookie = seed_admin(&pool, &h.app).await;
    let ids = seed_pages(&pool, 1).await;

    let resp = h
        .app
        .clone()
        .oneshot(common::post_json_with_cookie(
            &format!("/api/v1/admin/pages/{}/analyze", ids[0]),
            json!({}),
            &cookie,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::OK);

    let payload: serde_json::Value = sqlx::query_scalar(
        "SELECT payload FROM crawler_jobs WHERE payload->>'kind' = 'analyze_page'",
    )
    .fetch_one(&pool)
    .await
    .unwrap();
    assert_eq!(payload["force"].as_bool(), Some(true));
}

#[sqlx::test(migrations = "./migrations")]
async fn force_analyze_unknown_page_is_404(pool: PgPool) {
    let h = common::harness_with_analysis(pool.clone());
    let cookie = seed_admin(&pool, &h.app).await;

    let resp = h
        .app
        .clone()
        .oneshot(common::post_json_with_cookie(
            &format!("/api/v1/admin/pages/{}/analyze", uuid::Uuid::new_v4()),
            json!({}),
            &cookie,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::NOT_FOUND);
}