use crate::gateway::tests::{
    any, build_router_with_execution_runtime_override, build_router_with_state, start_server,
    AppState, Arc, Body, FrontdoorCorsConfig, Mutex, Request, Router, StatusCode,
    FRONTDOOR_MANIFEST_PATH, READYZ_PATH,
};

#[tokio::test]
async fn gateway_exposes_frontdoor_manifest_without_proxying_upstream() {
    let upstream_hits = Arc::new(Mutex::new(0usize));
    let upstream_hits_clone = Arc::clone(&upstream_hits);
    let upstream = Router::new().route(
        "/{*path}",
        any(move |_request: Request| {
            let upstream_hits_inner = Arc::clone(&upstream_hits_clone);
            async move {
                *upstream_hits_inner.lock().expect("mutex should lock") += 1;
                (StatusCode::OK, Body::from("proxied"))
            }
        }),
    );

    let (upstream_url, upstream_handle) = start_server(upstream).await;
    let gateway = build_router_with_execution_runtime_override("http://127.0.0.1:19091");
    let (gateway_url, gateway_handle) = start_server(gateway).await;

    let response = reqwest::Client::new()
        .get(format!("{gateway_url}{FRONTDOOR_MANIFEST_PATH}"))
        .send()
        .await
        .expect("request should succeed");

    assert_eq!(response.status(), StatusCode::OK);
    let payload: serde_json::Value = response.json().await.expect("json body should parse");
    assert_eq!(payload["component"], "aether-gateway");
    assert_eq!(payload["mode"], "compatibility_frontdoor");
    assert_eq!(
        payload["entrypoints"]["public_manifest"],
        FRONTDOOR_MANIFEST_PATH
    );
    assert_eq!(payload["entrypoints"]["readiness"], READYZ_PATH);
    assert_eq!(payload["entrypoints"]["health"], "/_gateway/health");
    assert_eq!(
        payload["rust_frontdoor"]["capabilities"]["public_proxy_catch_all"],
        true
    );
    let owned_routes = payload["rust_frontdoor"]["owned_route_patterns"]
        .as_array()
        .expect("owned route patterns should be an array");
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1/chat/completions"));
    assert!(owned_routes.iter().any(|value| value == "/v1/messages"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1/messages/count_tokens"));
    assert!(owned_routes.iter().any(|value| value == "/v1/responses"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1/responses/compact"));
    assert!(owned_routes.iter().any(|value| value == "/health"));
    assert!(owned_routes.iter().any(|value| value == "/v1/health"));
    assert!(owned_routes.iter().any(|value| value == "/v1/providers"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1/providers/{path...}"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1/test-connection"));
    assert!(owned_routes.iter().any(|value| value == "/test-connection"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/public/providers"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/oauth/providers"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/oauth/{provider_type}/authorize"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/oauth/{provider_type}/callback"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/user/oauth/bindable-providers"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/user/oauth/links"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/user/oauth/{provider_type}/bind-token"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/user/oauth/{provider_type}/bind"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/user/oauth/{provider_type}"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/capabilities"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/public/health/api-formats"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/modules/auth-status"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/internal/gateway/{path...}"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/internal/proxy-tunnel"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/internal/tunnel/heartbeat"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/internal/tunnel/node-status"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/internal/tunnel/relay/{node_id}"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/capabilities/user-configurable"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/api/capabilities/model/{path...}"));
    assert!(owned_routes.iter().any(|value| value == "/v1/models"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1/models/{path...}"));
    assert!(owned_routes.iter().any(|value| value == "/v1beta/models"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1beta/models/{path...}"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1beta/models/{model}:generateContent"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1beta/models/{model}:streamGenerateContent"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1beta/models/{model}:predictLongRunning"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1beta/operations/{id}"));
    assert!(owned_routes.iter().any(|value| value == "/v1/videos"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1/videos/{path...}"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/upload/v1beta/files"));
    assert!(owned_routes.iter().any(|value| value == "/v1beta/files"));
    assert!(owned_routes
        .iter()
        .any(|value| value == "/v1beta/files/{path...}"));
    assert_eq!(
        payload["rust_frontdoor"]["internal_gateway"]["status"],
        "rust_native_control_plane"
    );
    assert_eq!(
        payload["rust_frontdoor"]["internal_gateway"]["path_prefixes"][0],
        "/api/internal/gateway"
    );
    assert_eq!(payload["features"]["control_api_configured"], true);
    assert_eq!(payload["features"]["execution_runtime_configured"], true);
    assert!(payload["features"]
        .get("remote_executor_configured")
        .is_none());
    assert_eq!(*upstream_hits.lock().expect("mutex should lock"), 0);

    gateway_handle.abort();
    upstream_handle.abort();
}

#[tokio::test]
async fn gateway_reports_local_control_plane_as_configured_without_external_control_config() {
    let upstream_hits = Arc::new(Mutex::new(0usize));
    let upstream_hits_clone = Arc::clone(&upstream_hits);
    let upstream = Router::new().route(
        "/{*path}",
        any(move |_request: Request| {
            let upstream_hits_inner = Arc::clone(&upstream_hits_clone);
            async move {
                *upstream_hits_inner.lock().expect("mutex should lock") += 1;
                (StatusCode::OK, Body::from("proxied"))
            }
        }),
    );

    let (upstream_url, upstream_handle) = start_server(upstream).await;
    let gateway = build_router_with_execution_runtime_override("http://127.0.0.1:19091");
    let (gateway_url, gateway_handle) = start_server(gateway).await;

    let manifest = reqwest::Client::new()
        .get(format!("{gateway_url}{FRONTDOOR_MANIFEST_PATH}"))
        .send()
        .await
        .expect("manifest request should succeed");
    assert_eq!(manifest.status(), StatusCode::OK);
    let manifest_payload: serde_json::Value = manifest.json().await.expect("manifest should parse");
    assert_eq!(manifest_payload["features"]["control_api_configured"], true);
    assert_eq!(
        manifest_payload["features"]["execution_runtime_configured"],
        true
    );
    assert!(manifest_payload["features"]
        .get("remote_executor_configured")
        .is_none());

    let health = reqwest::Client::new()
        .get(format!("{gateway_url}/_gateway/health"))
        .send()
        .await
        .expect("health request should succeed");
    assert_eq!(health.status(), StatusCode::OK);
    let health_payload: serde_json::Value = health.json().await.expect("health should parse");
    assert_eq!(health_payload["control_api_enabled"], true);

    assert_eq!(*upstream_hits.lock().expect("mutex should lock"), 0);

    gateway_handle.abort();
    upstream_handle.abort();
}

#[tokio::test]
async fn gateway_reports_execution_runtime_as_configured_without_execution_runtime_override() {
    let upstream_hits = Arc::new(Mutex::new(0usize));
    let upstream_hits_clone = Arc::clone(&upstream_hits);
    let upstream = Router::new().route(
        "/{*path}",
        any(move |_request: Request| {
            let upstream_hits_inner = Arc::clone(&upstream_hits_clone);
            async move {
                *upstream_hits_inner.lock().expect("mutex should lock") += 1;
                (StatusCode::OK, Body::from("proxied"))
            }
        }),
    );

    let (upstream_url, upstream_handle) = start_server(upstream).await;
    let gateway = build_router_with_state(AppState::new().expect("gateway should build"));
    let (gateway_url, gateway_handle) = start_server(gateway).await;

    let manifest = reqwest::Client::new()
        .get(format!("{gateway_url}{FRONTDOOR_MANIFEST_PATH}"))
        .send()
        .await
        .expect("manifest request should succeed");
    assert_eq!(manifest.status(), StatusCode::OK);
    let manifest_payload: serde_json::Value = manifest.json().await.expect("manifest should parse");
    assert_eq!(manifest_payload["features"]["control_api_configured"], true);
    assert_eq!(
        manifest_payload["features"]["execution_runtime_configured"],
        true
    );
    assert!(manifest_payload["features"]
        .get("remote_executor_configured")
        .is_none());

    assert_eq!(*upstream_hits.lock().expect("mutex should lock"), 0);

    gateway_handle.abort();
    upstream_handle.abort();
}

#[tokio::test]
async fn gateway_handles_cors_preflight_without_proxying_upstream() {
    let upstream_hits = Arc::new(Mutex::new(0usize));
    let upstream_hits_clone = Arc::clone(&upstream_hits);
    let upstream = Router::new().route(
        "/{*path}",
        any(move |_request: Request| {
            let upstream_hits_inner = Arc::clone(&upstream_hits_clone);
            async move {
                *upstream_hits_inner.lock().expect("mutex should lock") += 1;
                (StatusCode::OK, Body::from("proxied"))
            }
        }),
    );

    let (upstream_url, upstream_handle) = start_server(upstream).await;
    let state = AppState::new()
        .expect("state should build")
        .with_frontdoor_cors_config(
            FrontdoorCorsConfig::new(vec!["http://localhost:3000".to_string()], true)
                .expect("cors config should build"),
        );
    let gateway = build_router_with_state(state);
    let (gateway_url, gateway_handle) = start_server(gateway).await;

    let response = reqwest::Client::new()
        .request(
            reqwest::Method::OPTIONS,
            format!("{gateway_url}/v1/chat/completions"),
        )
        .header("origin", "http://localhost:3000")
        .header("access-control-request-method", "POST")
        .header(
            "access-control-request-headers",
            "authorization,content-type",
        )
        .send()
        .await
        .expect("preflight should succeed");

    assert_eq!(response.status(), StatusCode::NO_CONTENT);
    assert_eq!(
        response
            .headers()
            .get("access-control-allow-origin")
            .expect("allow origin header"),
        "http://localhost:3000"
    );
    assert_eq!(
        response
            .headers()
            .get("access-control-allow-credentials")
            .expect("allow credentials header"),
        "true"
    );
    assert_eq!(*upstream_hits.lock().expect("mutex should lock"), 0);

    gateway_handle.abort();
    upstream_handle.abort();
}

#[tokio::test]
async fn gateway_adds_cors_headers_to_proxied_responses() {
    let upstream = Router::new().route(
        "/proxy-cors",
        any(|_request: Request| async move { (StatusCode::OK, Body::from("proxied")) }),
    );

    let (upstream_url, upstream_handle) = start_server(upstream).await;
    let state = AppState::new()
        .expect("state should build")
        .with_frontdoor_cors_config(
            FrontdoorCorsConfig::new(vec!["http://localhost:3000".to_string()], true)
                .expect("cors config should build"),
        );
    let gateway = build_router_with_state(state);
    let (gateway_url, gateway_handle) = start_server(gateway).await;

    let response = reqwest::Client::new()
        .post(format!("{gateway_url}/proxy-cors"))
        .header("origin", "http://localhost:3000")
        .send()
        .await
        .expect("proxy request should succeed");

    assert_eq!(response.status(), StatusCode::OK);
    assert_eq!(
        response
            .headers()
            .get("access-control-allow-origin")
            .expect("allow origin header"),
        "http://localhost:3000"
    );
    assert_eq!(
        response
            .headers()
            .get("access-control-expose-headers")
            .expect("expose headers header"),
        "*"
    );

    gateway_handle.abort();
    upstream_handle.abort();
}