mod common;

use axum::http::{header, StatusCode};
use serde_json::json;
use sqlx::PgPool;
use tower::ServiceExt;

fn creds(username: &str) -> serde_json::Value {
    json!({ "username": username, "password": "hunter2hunter2" })
}

#[sqlx::test(migrations = "./migrations")]
async fn register_creates_user_and_sets_session_cookie(pool: PgPool) {
    let h = common::harness(pool);
    let resp = h
        .app
        .oneshot(common::post_json(
            "/api/v1/auth/register",
            creds("alice"),
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::CREATED);

    let cookie_header = resp
        .headers()
        .get(header::SET_COOKIE)
        .expect("Set-Cookie present")
        .to_str()
        .unwrap()
        .to_string();
    assert!(cookie_header.starts_with("mangalord_session="));
    assert!(cookie_header.contains("HttpOnly"));
    assert!(cookie_header.contains("SameSite=Lax"));
    assert!(cookie_header.contains("Path=/"));
    // In the test harness cookie_secure is false; production has Secure.
    assert!(!cookie_header.contains("Secure"));

    let body = common::body_json(resp).await;
    assert_eq!(body["user"]["username"], "alice");
    assert!(body["user"]["id"].as_str().is_some());
    assert!(
        body["user"].get("password_hash").is_none(),
        "password_hash must never leak to the API"
    );
}

#[sqlx::test(migrations = "./migrations")]
async fn register_rejects_duplicate_username_with_conflict(pool: PgPool) {
    let h = common::harness(pool);
    let _ = h
        .app
        .clone()
        .oneshot(common::post_json("/api/v1/auth/register", creds("alice")))
        .await
        .unwrap();
    let resp = h
        .app
        .oneshot(common::post_json("/api/v1/auth/register", creds("alice")))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::CONFLICT);
    let body = common::body_json(resp).await;
    assert_eq!(body["error"]["code"], "conflict");
}

#[sqlx::test(migrations = "./migrations")]
async fn register_rejects_case_only_username_collisions(pool: PgPool) {
    let h = common::harness(pool);
    let _ = h
        .app
        .clone()
        .oneshot(common::post_json("/api/v1/auth/register", creds("alice")))
        .await
        .unwrap();
    // Mixed-case variant collides via the lower(username) index.
    let resp = h
        .app
        .clone()
        .oneshot(common::post_json("/api/v1/auth/register", creds("Alice")))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::CONFLICT);

    // Login with either casing finds the same user.
    let resp = h
        .app
        .oneshot(common::post_json("/api/v1/auth/login", creds("ALICE")))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::OK);
}

#[sqlx::test(migrations = "./migrations")]
async fn register_rejects_short_password(pool: PgPool) {
    let h = common::harness(pool);
    let resp = h
        .app
        .oneshot(common::post_json(
            "/api/v1/auth/register",
            json!({ "username": "alice", "password": "short" }),
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::BAD_REQUEST);
    let body = common::body_json(resp).await;
    assert_eq!(body["error"]["code"], "invalid_input");
}

#[sqlx::test(migrations = "./migrations")]
async fn login_succeeds_and_rotates_session(pool: PgPool) {
    let h = common::harness(pool);
    let _ = h
        .app
        .clone()
        .oneshot(common::post_json("/api/v1/auth/register", creds("alice")))
        .await
        .unwrap();

    let resp = h
        .app
        .oneshot(common::post_json("/api/v1/auth/login", creds("alice")))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::OK);
    let cookie = common::extract_session_cookie(&resp).expect("login sets a cookie");
    assert!(cookie.starts_with("mangalord_session="));
}

#[sqlx::test(migrations = "./migrations")]
async fn login_rejects_wrong_password(pool: PgPool) {
    let h = common::harness(pool);
    let _ = h
        .app
        .clone()
        .oneshot(common::post_json("/api/v1/auth/register", creds("alice")))
        .await
        .unwrap();

    let resp = h
        .app
        .oneshot(common::post_json(
            "/api/v1/auth/login",
            json!({ "username": "alice", "password": "wrongpassword" }),
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::UNAUTHORIZED);
    let body = common::body_json(resp).await;
    assert_eq!(body["error"]["code"], "unauthenticated");
}

#[sqlx::test(migrations = "./migrations")]
async fn login_rejects_unknown_user(pool: PgPool) {
    let h = common::harness(pool);
    let resp = h
        .app
        .oneshot(common::post_json("/api/v1/auth/login", creds("ghost")))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::UNAUTHORIZED);
}

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

    let resp = h
        .app
        .oneshot(common::get_with_cookie("/api/v1/auth/me", &cookie))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::OK);
    let body = common::body_json(resp).await;
    assert_eq!(body["user"]["username"], username);
}

#[sqlx::test(migrations = "./migrations")]
async fn me_returns_401_without_cookie(pool: PgPool) {
    let h = common::harness(pool);
    let resp = h
        .app
        .oneshot(common::get("/api/v1/auth/me"))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::UNAUTHORIZED);
}

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

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

    // Same cookie no longer works.
    let resp = h
        .app
        .oneshot(common::get_with_cookie("/api/v1/auth/me", &cookie))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::UNAUTHORIZED);
}

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

    let resp = h
        .app
        .clone()
        .oneshot(common::post_json_with_cookie(
            "/api/v1/auth/tokens",
            json!({ "name": "ci-bot" }),
            &cookie,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::CREATED);
    let body = common::body_json(resp).await;
    assert_eq!(body["name"], "ci-bot");
    let bearer = body["bearer"]
        .as_str()
        .expect("raw bearer in response")
        .to_string();
    assert!(body["token_hash"].is_null(), "token_hash must not leak");

    // Use the bearer to hit /me — should authenticate.
    let resp = h
        .app
        .oneshot(common::get_with_bearer("/api/v1/auth/me", &bearer))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::OK);
}

#[sqlx::test(migrations = "./migrations")]
async fn user_a_cannot_delete_user_b_token(pool: PgPool) {
    let h = common::harness(pool);
    let (_, cookie_a) = common::register_user(&h.app).await;
    let (_, cookie_b) = common::register_user(&h.app).await;

    let resp = h
        .app
        .clone()
        .oneshot(common::post_json_with_cookie(
            "/api/v1/auth/tokens",
            json!({ "name": "alice-bot" }),
            &cookie_a,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::CREATED);
    let body = common::body_json(resp).await;
    let token_id = body["id"].as_str().unwrap().to_string();

    // User B attempts to delete user A's token → 403.
    let resp = h
        .app
        .clone()
        .oneshot(common::delete_with_cookie(
            &format!("/api/v1/auth/tokens/{token_id}"),
            &cookie_b,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::FORBIDDEN);
    let body = common::body_json(resp).await;
    assert_eq!(body["error"]["code"], "forbidden");

    // User A succeeds.
    let resp = h
        .app
        .oneshot(common::delete_with_cookie(
            &format!("/api/v1/auth/tokens/{token_id}"),
            &cookie_a,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::NO_CONTENT);
}

#[sqlx::test(migrations = "./migrations")]
async fn delete_unknown_token_is_404(pool: PgPool) {
    let h = common::harness(pool);
    let (_, cookie) = common::register_user(&h.app).await;
    let resp = h
        .app
        .oneshot(common::delete_with_cookie(
            "/api/v1/auth/tokens/00000000-0000-0000-0000-000000000000",
            &cookie,
        ))
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::NOT_FOUND);
}