use axum::{body::{to_bytes, Body}, http::{Request, StatusCode}};
use chrono::Utc;
use hermes_backend::{app_state::AppState, build_router, config::AppConfig};
use serde_json as json;
use tower::ServiceExt;

#[tokio::test]
async fn health_returns_ok() {
    let app = build_router(AppState::new(AppConfig::default(), None, None));

    let response = app
        .oneshot(Request::builder().uri("/health").body(Body::empty()).unwrap())
        .await
        .unwrap();

    assert_eq!(response.status(), StatusCode::OK);
}

#[tokio::test]
async fn session_start_and_me_work() {
    let app = build_router(AppState::new(AppConfig::default(), None, None));

    let response = app
        .clone()
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/api/v1/session/start")
                .header("content-type", "application/json")
                .body(Body::from("{}"))
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(response.status(), StatusCode::CREATED);

    let body = to_bytes(response.into_body(), usize::MAX).await.unwrap();
    let json: json::Value = json::from_slice(&body).unwrap();
    assert_eq!(json["locale_code"], "en");

    let response = app
        .oneshot(Request::builder().uri("/api/v1/session/me").body(Body::empty()).unwrap())
        .await
        .unwrap();

    assert_eq!(response.status(), StatusCode::OK);
}

#[tokio::test]
async fn participant_ref_reuses_the_same_user() {
    let app = build_router(AppState::new(AppConfig::default(), None, None));

    let body = json::json!({
        "external_ref": "participant-001",
        "locale_code": "sv"
    })
    .to_string();

    let first = app
        .clone()
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/api/v1/session/start")
                .header("content-type", "application/json")
                .body(Body::from(body.clone()))
                .unwrap(),
        )
        .await
        .unwrap();

    let first_body = to_bytes(first.into_body(), usize::MAX).await.unwrap();
    let first_json: json::Value = json::from_slice(&first_body).unwrap();

    let second = app
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/api/v1/session/start")
                .header("content-type", "application/json")
                .body(Body::from(body))
                .unwrap(),
        )
        .await
        .unwrap();

    let second_body = to_bytes(second.into_body(), usize::MAX).await.unwrap();
    let second_json: json::Value = json::from_slice(&second_body).unwrap();

    assert_eq!(first_json["user_id"], second_json["user_id"]);
    assert_eq!(first_json["locale_code"], "sv");
}

#[tokio::test]
async fn feed_next_returns_a_manifestable_event() {
    let app = build_router(AppState::new(AppConfig::default(), None, None));

    let response = app
        .clone()
        .oneshot(Request::builder().uri("/api/v1/feed/next").body(Body::empty()).unwrap())
        .await
        .unwrap();

    assert_eq!(response.status(), StatusCode::OK);

    let body = to_bytes(response.into_body(), usize::MAX).await.unwrap();
    let event: json::Value = json::from_slice(&body).unwrap();
    let event_id = event["id"].as_str().unwrap().to_string();

    assert_eq!(event["status"], "prefetch_ready");

    let response = app
        .clone()
        .oneshot(
            Request::builder()
                .uri(format!("/api/v1/events/{event_id}/manifest"))
                .body(Body::empty())
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(response.status(), StatusCode::OK);

    let body = to_bytes(response.into_body(), usize::MAX).await.unwrap();
    let manifest: json::Value = json::from_slice(&body).unwrap();

    assert_eq!(manifest["event"]["id"], event_id);
    assert!(manifest["media"].as_array().unwrap().len() >= 1);
    assert!(manifest["markets"].as_array().unwrap().len() >= 1);
}

#[tokio::test]
async fn bet_intent_accepts_and_is_idempotent() {
    let app = build_router(AppState::new(AppConfig::default(), None, None));

    let session_response = app
        .clone()
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/api/v1/session/start")
                .header("content-type", "application/json")
                .body(Body::from("{}"))
                .unwrap(),
        )
        .await
        .unwrap();

    let session_body = to_bytes(session_response.into_body(), usize::MAX).await.unwrap();
    let session_json: json::Value = json::from_slice(&session_body).unwrap();
    let session_id = session_json["session_id"].as_str().unwrap().to_string();

    let event_response = app
        .clone()
        .oneshot(Request::builder().uri("/api/v1/feed/next").body(Body::empty()).unwrap())
        .await
        .unwrap();

    let event_body = to_bytes(event_response.into_body(), usize::MAX).await.unwrap();
    let event_json: json::Value = json::from_slice(&event_body).unwrap();
    let event_id = event_json["id"].as_str().unwrap().to_string();

    let markets_response = app
        .clone()
        .oneshot(
            Request::builder()
                .uri(format!("/api/v1/events/{event_id}/markets"))
                .body(Body::empty())
                .unwrap(),
        )
        .await
        .unwrap();

    let markets_body = to_bytes(markets_response.into_body(), usize::MAX).await.unwrap();
    let markets_json: json::Value = json::from_slice(&markets_body).unwrap();
    let market_id = markets_json[0]["id"].as_str().unwrap().to_string();
    let outcome_id = markets_json[0]["outcomes"][0]["id"].as_str().unwrap().to_string();

    let request = json::json!({
        "session_id": session_id,
        "event_id": event_id,
        "market_id": market_id,
        "outcome_id": outcome_id,
        "idempotency_key": "bet-001",
        "client_sent_at": Utc::now().to_rfc3339(),
    })
    .to_string();

    let response = app
        .clone()
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/api/v1/bets/intent")
                .header("content-type", "application/json")
                .body(Body::from(request.clone()))
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(response.status(), StatusCode::CREATED);

    let body = to_bytes(response.into_body(), usize::MAX).await.unwrap();
    let first_json: json::Value = json::from_slice(&body).unwrap();
    let bet_id = first_json["id"].as_str().unwrap().to_string();
    assert_eq!(first_json["accepted"], true);
    assert_eq!(first_json["acceptance_code"], "accepted");

    let response = app
        .clone()
        .oneshot(
            Request::builder()
                .uri(format!("/api/v1/bets/{bet_id}"))
                .body(Body::empty())
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(response.status(), StatusCode::OK);

    let body = to_bytes(response.into_body(), usize::MAX).await.unwrap();
    let lookup_json: json::Value = json::from_slice(&body).unwrap();
    assert_eq!(lookup_json["id"], bet_id);
    assert_eq!(lookup_json["accepted"], true);

    let response = app
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/api/v1/bets/intent")
                .header("content-type", "application/json")
                .body(Body::from(request))
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(response.status(), StatusCode::CREATED);

    let body = to_bytes(response.into_body(), usize::MAX).await.unwrap();
    let duplicate_json: json::Value = json::from_slice(&body).unwrap();
    assert_eq!(duplicate_json["id"], bet_id);
    assert_eq!(duplicate_json["accepted"], true);
}

#[tokio::test]
async fn event_result_returns_settlement() {
    let app = build_router(AppState::new(AppConfig::default(), None, None));

    let event_response = app
        .clone()
        .oneshot(Request::builder().uri("/api/v1/feed/next").body(Body::empty()).unwrap())
        .await
        .unwrap();

    let event_body = to_bytes(event_response.into_body(), usize::MAX).await.unwrap();
    let event_json: json::Value = json::from_slice(&event_body).unwrap();
    let event_id = event_json["id"].as_str().unwrap().to_string();

    let markets_response = app
        .clone()
        .oneshot(
            Request::builder()
                .uri(format!("/api/v1/events/{event_id}/markets"))
                .body(Body::empty())
                .unwrap(),
        )
        .await
        .unwrap();

    let markets_body = to_bytes(markets_response.into_body(), usize::MAX).await.unwrap();
    let markets_json: json::Value = json::from_slice(&markets_body).unwrap();
    let market_id = markets_json[0]["id"].as_str().unwrap().to_string();
    let winning_outcome_id = markets_json[0]["outcomes"][0]["id"].as_str().unwrap().to_string();

    let response = app
        .oneshot(
            Request::builder()
                .uri(format!("/api/v1/events/{event_id}/result"))
                .body(Body::empty())
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(response.status(), StatusCode::OK);

    let body = to_bytes(response.into_body(), usize::MAX).await.unwrap();
    let result_json: json::Value = json::from_slice(&body).unwrap();

    assert_eq!(result_json["market_id"], market_id);
    assert_eq!(result_json["winning_outcome_id"], winning_outcome_id);
}

#[tokio::test]
async fn experiments_and_localization_work() {
    let app = build_router(AppState::new(AppConfig::default(), None, None));

    let session_response = app
        .clone()
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/api/v1/session/start")
                .header("content-type", "application/json")
                .body(Body::from(
                    json::json!({
                        "experiment_variant": "modern"
                    })
                    .to_string(),
                ))
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(session_response.status(), StatusCode::CREATED);

    let config_response = app
        .clone()
        .oneshot(Request::builder().uri("/api/v1/experiments/config").body(Body::empty()).unwrap())
        .await
        .unwrap();

    assert_eq!(config_response.status(), StatusCode::OK);

    let config_body = to_bytes(config_response.into_body(), usize::MAX).await.unwrap();
    let config_json: json::Value = json::from_slice(&config_body).unwrap();
    assert_eq!(config_json["variant"], "modern");
    assert_eq!(config_json["feature_flags"]["modern_mode"], true);

    let localization_response = app
        .clone()
        .oneshot(Request::builder().uri("/api/v1/localization/sv").body(Body::empty()).unwrap())
        .await
        .unwrap();

    assert_eq!(localization_response.status(), StatusCode::OK);

    let localization_body = to_bytes(localization_response.into_body(), usize::MAX).await.unwrap();
    let localization_json: json::Value = json::from_slice(&localization_body).unwrap();
    assert_eq!(localization_json["locale_code"], "sv");
    assert_eq!(localization_json["values"]["common.continue"], "Fortsätt");

    let localization_en_response = app
        .oneshot(Request::builder().uri("/api/v1/localization/en").body(Body::empty()).unwrap())
        .await
        .unwrap();

    assert_eq!(localization_en_response.status(), StatusCode::OK);
}

#[tokio::test]
async fn analytics_batch_is_recorded() {
    let state = AppState::new(AppConfig::default(), None, None);
    let app = build_router(state.clone());

    let session_response = app
        .clone()
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/api/v1/session/start")
                .header("content-type", "application/json")
                .body(Body::from("{}"))
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(session_response.status(), StatusCode::CREATED);

    let response = app
        .oneshot(
            Request::builder()
                .method("POST")
                .uri("/api/v1/analytics/batch")
                .header("content-type", "application/json")
                .body(Body::from(
                    json::json!({
                        "events": [
                            {
                                "event_name": "screen_viewed",
                                "occurred_at": Utc::now().to_rfc3339(),
                                "attributes": [
                                    {"key": "screen_name", "value": "feed"}
                                ]
                            },
                            {
                                "event_name": "cta_pressed",
                                "occurred_at": Utc::now().to_rfc3339()
                            }
                        ]
                    })
                    .to_string(),
                ))
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(response.status(), StatusCode::ACCEPTED);

    let (event_count, attribute_count) = state.analytics_counts().await;
    assert_eq!(event_count, 2);
    assert_eq!(attribute_count, 1);
}

#[tokio::test]
async fn event_markets_and_current_odds_work() {
    let app = build_router(AppState::new(AppConfig::default(), None, None));

    let event_response = app
        .clone()
        .oneshot(Request::builder().uri("/api/v1/feed/next").body(Body::empty()).unwrap())
        .await
        .unwrap();

    let event_body = to_bytes(event_response.into_body(), usize::MAX).await.unwrap();
    let event: json::Value = json::from_slice(&event_body).unwrap();
    let event_id = event["id"].as_str().unwrap().to_string();

    let markets_response = app
        .clone()
        .oneshot(
            Request::builder()
                .uri(format!("/api/v1/events/{event_id}/markets"))
                .body(Body::empty())
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(markets_response.status(), StatusCode::OK);

    let markets_body = to_bytes(markets_response.into_body(), usize::MAX).await.unwrap();
    let markets: json::Value = json::from_slice(&markets_body).unwrap();
    let market_id = markets[0]["id"].as_str().unwrap().to_string();

    assert_eq!(markets[0]["outcomes"].as_array().unwrap().len(), 2);

    let odds_response = app
        .oneshot(
            Request::builder()
                .uri(format!("/api/v1/markets/{market_id}/odds/current"))
                .body(Body::empty())
                .unwrap(),
        )
        .await
        .unwrap();

    assert_eq!(odds_response.status(), StatusCode::OK);

    let odds_body = to_bytes(odds_response.into_body(), usize::MAX).await.unwrap();
    let odds: json::Value = json::from_slice(&odds_body).unwrap();

    assert_eq!(odds["market_id"], market_id);
    assert_eq!(odds["is_current"], true);
    assert_eq!(odds["odds"].as_array().unwrap().len(), 2);
}