use axum::{
    body::Body,
    http::{Request, StatusCode},
};
use serde_json::Value;
use tower::ServiceExt;

// We test by spinning up the full app against an in-memory SQLite database.

async fn build_test_app() -> axum::Router {
    let pool = sqlx::sqlite::SqlitePoolOptions::new()
        .connect("sqlite::memory:")
        .await
        .expect("in-memory sqlite");

    sqlx::migrate!("./migrations")
        .run(&pool)
        .await
        .expect("migrations");

    let data_dir = "data";
    openfut_core::build_app(pool, data_dir)
        .await
        .expect("app build")
}

async fn auth(app: &axum::Router, username: &str) -> Value {
    let payload = serde_json::json!({ "username": username });
    let resp = app
        .clone()
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/auth/local")
                .header("content-type", "application/json")
                .body(Body::from(payload.to_string()))
                .unwrap(),
        )
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::OK);
    let body = axum::body::to_bytes(resp.into_body(), usize::MAX)
        .await
        .unwrap();
    serde_json::from_slice(&body).unwrap()
}

async fn json_get(app: &axum::Router, uri: &str) -> (StatusCode, Value) {
    let resp = app
        .clone()
        .oneshot(Request::builder().uri(uri).body(Body::empty()).unwrap())
        .await
        .unwrap();
    let status = resp.status();
    let body = axum::body::to_bytes(resp.into_body(), usize::MAX)
        .await
        .unwrap();
    (status, serde_json::from_slice(&body).unwrap())
}

async fn json_post(app: &axum::Router, uri: &str, payload: Value) -> (StatusCode, Value) {
    let resp = app
        .clone()
        .oneshot(
            Request::builder()
                .method("POST")
                .uri(uri)
                .header("content-type", "application/json")
                .body(Body::from(payload.to_string()))
                .unwrap(),
        )
        .await
        .unwrap();
    let status = resp.status();
    let body = axum::body::to_bytes(resp.into_body(), usize::MAX)
        .await
        .unwrap();
    (status, serde_json::from_slice(&body).unwrap())
}

// ── Existing tests ───────────────────────────────────────────────────────────

#[tokio::test]
async fn test_health_endpoint() {
    let app = build_test_app().await;
    let (status, json) = json_get(&app, "/health").await;
    assert_eq!(status, StatusCode::OK);
    assert_eq!(json["status"], "ok");
}

#[tokio::test]
async fn test_formations_endpoint() {
    let app = build_test_app().await;
    let (status, json) = json_get(&app, "/formations").await;
    assert_eq!(status, StatusCode::OK);
    assert!(json["formations"].is_array());
    assert!(json["formations"].as_array().unwrap().len() >= 8);
}

#[tokio::test]
async fn test_auth_local_creates_profile_and_club() {
    let app = build_test_app().await;
    let json = auth(&app, "TestPlayer").await;
    assert_eq!(json["profile"]["username"], "TestPlayer");
    assert_eq!(json["club"]["name"], "OpenFUT FC");
    assert_eq!(json["club"]["coins"], 5000);
}

#[tokio::test]
async fn test_profile_not_found_before_auth() {
    let app = build_test_app().await;
    let (status, _) = json_get(&app, "/profile").await;
    assert_eq!(status, StatusCode::NOT_FOUND);
}

#[tokio::test]
async fn test_match_result_awards_coins() {
    let app = build_test_app().await;
    auth(&app, "MatchPlayer").await;

    let payload = serde_json::json!({
        "squad_id": "dummy-squad",
        "opponent_name": "AI Club",
        "goals_for": 3,
        "goals_against": 1,
        "mode": "squad_battles"
    });
    let (status, json) = json_post(&app, "/matches/result", payload).await;
    assert_eq!(status, StatusCode::OK);
    assert_eq!(json["match_record"]["outcome"], "win");
    assert!(json["coins_awarded"].as_i64().unwrap() > 0);
}

#[tokio::test]
async fn test_sbc_list_returns_definitions() {
    let app = build_test_app().await;
    let (status, json) = json_get(&app, "/sbc").await;
    assert_eq!(status, StatusCode::OK);
    assert!(json["sbcs"].is_array());
}

// ── Phase 3 new tests ────────────────────────────────────────────────────────

#[tokio::test]
async fn test_match_with_goal_positions_tracks_stats() {
    let app = build_test_app().await;
    auth(&app, "GoalTracker").await;

    let payload = serde_json::json!({
        "squad_id": "dummy-squad",
        "opponent_name": "AI Club",
        "goals_for": 3,
        "goals_against": 0,
        "mode": "squad_battles",
        "goal_positions": ["ST", "ST", "CAM"]
    });
    let (status, _) = json_post(&app, "/matches/result", payload).await;
    assert_eq!(status, StatusCode::OK);

    let (status, stats) = json_get(&app, "/statistics").await;
    assert_eq!(status, StatusCode::OK);
    assert!(stats["position_goals"].is_object());
    assert_eq!(stats["position_goals"]["ST"], 2);
    assert_eq!(stats["position_goals"]["CAM"], 1);
}

#[tokio::test]
async fn test_buy_and_open_pack() {
    let app = build_test_app().await;
    auth(&app, "PackOpener").await;

    // Starter gold_pack is granted on registration
    let (status, packs_json) = json_get(&app, "/packs").await;
    assert_eq!(status, StatusCode::OK);
    let packs = packs_json["packs"].as_array().unwrap();
    assert!(!packs.is_empty(), "starter pack should be in inventory");

    let pack_id = packs[0]["pack_id"].as_str().unwrap();
    let (status, open_json) = json_post(
        &app,
        &format!("/packs/open/{pack_id}"),
        serde_json::json!({}),
    )
    .await;
    assert_eq!(status, StatusCode::OK, "open failed: {open_json}");
    assert!(!open_json["cards"].as_array().unwrap().is_empty());

    let (status, coll) = json_get(&app, "/collection").await;
    assert_eq!(status, StatusCode::OK);
    assert!(!coll["collection"].as_array().unwrap().is_empty());
}

#[tokio::test]
async fn test_buy_bronze_pack_deducts_coins() {
    let app = build_test_app().await;
    auth(&app, "CoinSpender").await;

    let (status, buy_json) = json_post(
        &app,
        "/packs/buy",
        serde_json::json!({ "pack_definition_id": "bronze_pack" }),
    )
    .await;
    assert_eq!(status, StatusCode::OK, "buy failed: {buy_json}");

    let (_, club_json) = json_get(&app, "/club").await;
    assert_eq!(club_json["coins"], 5000 - 400);
}

#[tokio::test]
async fn test_sbc_submit_with_bronze_cards() {
    let app = build_test_app().await;
    auth(&app, "SBCPlayer").await;

    // Buy and open a bronze pack
    let (s, _) = json_post(
        &app,
        "/packs/buy",
        serde_json::json!({ "pack_definition_id": "bronze_pack" }),
    )
    .await;
    assert_eq!(s, StatusCode::OK);

    let (_, packs_json) = json_get(&app, "/packs").await;
    let bronze_pack = packs_json["packs"]
        .as_array()
        .unwrap()
        .iter()
        .find(|p| p["definition_id"] == "bronze_pack")
        .expect("bronze pack in inventory");
    let pack_id = bronze_pack["pack_id"].as_str().unwrap();

    let (s, open_json) = json_post(
        &app,
        &format!("/packs/open/{pack_id}"),
        serde_json::json!({}),
    )
    .await;
    assert_eq!(s, StatusCode::OK, "{open_json}");

    // Collect bronze card IDs (overall ≤ 64)
    let (_, coll) = json_get(&app, "/collection").await;
    let bronze_ids: Vec<&str> = coll["collection"]
        .as_array()
        .unwrap()
        .iter()
        .filter(|c| c["card"]["overall"].as_i64().unwrap_or(99) <= 64)
        .take(11)
        .map(|c| c["owned_card_id"].as_str().unwrap())
        .collect();

    if bronze_ids.len() < 11 {
        // Card pool variance — not enough bronze to fill SBC; skip gracefully
        return;
    }

    let (s, result) = json_post(
        &app,
        "/sbc/submit",
        serde_json::json!({
            "sbc_id": "sbc_bronze_upgrade",
            "owned_card_ids": bronze_ids
        }),
    )
    .await;
    assert_eq!(s, StatusCode::OK, "SBC submit: {result}");
    assert_eq!(result["passed"], true);
    // bronze_upgrade rewards a silver pack (coins = 0)
    assert!(result["reward"].is_object());
}

#[tokio::test]
async fn test_settings_read_write() {
    let app = build_test_app().await;
    auth(&app, "SettingsUser").await;

    let (status, defaults) = json_get(&app, "/settings").await;
    assert_eq!(status, StatusCode::OK);
    assert_eq!(defaults["difficulty"], "beginner");
    assert_eq!(defaults["preferred_formation"], "4-4-2");

    let resp = app
        .clone()
        .oneshot(
            Request::builder()
                .method("PUT")
                .uri("/settings")
                .header("content-type", "application/json")
                .body(Body::from(
                    serde_json::json!({
                        "difficulty": "world_class",
                        "preferred_formation": "4-3-3"
                    })
                    .to_string(),
                ))
                .unwrap(),
        )
        .await
        .unwrap();
    assert_eq!(resp.status(), StatusCode::OK);
    let body = axum::body::to_bytes(resp.into_body(), usize::MAX)
        .await
        .unwrap();
    let updated: Value = serde_json::from_slice(&body).unwrap();
    assert_eq!(updated["difficulty"], "world_class");
    assert_eq!(updated["preferred_formation"], "4-3-3");

    let (s, persisted) = json_get(&app, "/settings").await;
    assert_eq!(s, StatusCode::OK);
    assert_eq!(persisted["difficulty"], "world_class");
}

#[tokio::test]
async fn test_multiple_squads() {
    let app = build_test_app().await;
    auth(&app, "SquadManager").await;

    let (s1, j1) = json_post(
        &app,
        "/squad",
        serde_json::json!({ "name": "Attack Squad", "formation": "4-3-3", "players": [] }),
    )
    .await;
    assert_eq!(s1, StatusCode::OK, "{j1}");
    let squad1_id = j1["squad"]["id"].as_str().unwrap().to_string();

    let (s2, j2) = json_post(
        &app,
        "/squad",
        serde_json::json!({ "name": "Defense Squad", "formation": "5-4-1", "players": [] }),
    )
    .await;
    assert_eq!(s2, StatusCode::OK, "{j2}");
    let squad2_id = j2["squad"]["id"].as_str().unwrap().to_string();

    assert_ne!(squad1_id, squad2_id);

    let (status, squads_json) = json_get(&app, "/squads").await;
    assert_eq!(status, StatusCode::OK);
    assert_eq!(squads_json["squads"].as_array().unwrap().len(), 2);

    let (status, sq1) = json_get(&app, &format!("/squads/{squad1_id}")).await;
    assert_eq!(status, StatusCode::OK);
    assert_eq!(sq1["squad"]["name"], "Attack Squad");
}

#[tokio::test]
async fn test_draft_squad_endpoint() {
    let app = build_test_app().await;
    auth(&app, "DraftPlayer").await;

    let (status, json) = json_get(&app, "/draft/squad?difficulty=beginner").await;
    assert_eq!(status, StatusCode::OK);
    assert_eq!(json["mode"], "draft");
    assert_eq!(json["difficulty"], "beginner");
    assert!(json["cards"].is_array());
}

#[tokio::test]
async fn test_win_streak_tracking() {
    let app = build_test_app().await;
    auth(&app, "StreakPlayer").await;

    for _ in 0..3 {
        let (s, _) = json_post(
            &app,
            "/matches/result",
            serde_json::json!({
                "squad_id": "dummy",
                "opponent_name": "Bot",
                "goals_for": 2,
                "goals_against": 0,
                "mode": "squad_battles"
            }),
        )
        .await;
        assert_eq!(s, StatusCode::OK);
    }

    let (s, stats) = json_get(&app, "/statistics").await;
    assert_eq!(s, StatusCode::OK);
    assert_eq!(stats["win_streak"], 3);
    assert_eq!(stats["best_win_streak"], 3);
}

// ── Phase 5: Events ──────────────────────────────────────────────────────────

#[tokio::test]
async fn test_events_list() {
    let app = build_test_app().await;
    let (status, json) = json_get(&app, "/events").await;
    assert_eq!(status, StatusCode::OK);
    assert!(json["events"].is_array());
    // TOTW Week 1 is date-range active (2024–2030)
    let active = json["active_count"].as_u64().unwrap_or(0);
    assert!(active >= 1, "expected at least 1 active event (totw_week1)");
}

#[tokio::test]
async fn test_event_get_single() {
    let app = build_test_app().await;
    let (status, json) = json_get(&app, "/events/totw_week1").await;
    assert_eq!(status, StatusCode::OK);
    assert_eq!(json["event"]["id"], "totw_week1");
    assert_eq!(json["is_active"], true);
}

#[tokio::test]
async fn test_event_activate_deactivate() {
    let app = build_test_app().await;

    // spring_festival is manual-only — should start inactive
    let (s, json) = json_get(&app, "/events/spring_festival").await;
    assert_eq!(s, StatusCode::OK);
    assert_eq!(json["is_active"], false);

    // Activate it
    let (s, json) = json_post(
        &app,
        "/events/spring_festival/activate",
        serde_json::json!({}),
    )
    .await;
    assert_eq!(s, StatusCode::OK);
    assert_eq!(json["is_active"], true);

    // Confirm it's now active
    let (s, json) = json_get(&app, "/events/spring_festival").await;
    assert_eq!(s, StatusCode::OK);
    assert_eq!(json["is_active"], true);

    // Deactivate it
    let (s, json) = json_post(
        &app,
        "/events/spring_festival/deactivate",
        serde_json::json!({}),
    )
    .await;
    assert_eq!(s, StatusCode::OK);
    assert_eq!(json["is_active"], false);

    // Confirm inactive again
    let (s, json) = json_get(&app, "/events/spring_festival").await;
    assert_eq!(s, StatusCode::OK);
    assert_eq!(json["is_active"], false);
}

#[tokio::test]
async fn test_event_unknown_returns_404() {
    let app = build_test_app().await;
    let (status, _) = json_get(&app, "/events/no_such_event").await;
    assert_eq!(status, StatusCode::NOT_FOUND);
}

#[tokio::test]
async fn test_event_market_refresh_injects_totw_cards() {
    let app = build_test_app().await;
    auth(&app, "EventMarketPlayer").await;

    // Trigger a market refresh (TOTW event is active by date range)
    let (s, json) = json_post(&app, "/market/refresh", serde_json::json!({})).await;
    assert_eq!(s, StatusCode::OK);
    // totw_week1 has 5 bonus cards + up to 20 NPC listings
    let count = json["listings_generated"].as_u64().unwrap_or(0);
    assert!(
        count >= 5,
        "expected at least 5 listings (event bonus cards)"
    );

    // Check market contains at least one [EVENT] listing
    let (s, market) = json_get(&app, "/market").await;
    assert_eq!(s, StatusCode::OK);
    let listings = market["listings"].as_array().expect("listings array");
    let event_listing = listings.iter().any(|l| {
        l["seller_name"]
            .as_str()
            .map(|n| n.starts_with("[EVENT]"))
            .unwrap_or(false)
    });
    assert!(
        event_listing,
        "expected at least one [EVENT] market listing"
    );
}