use axum::body::Body;
use axum::http::{Request, StatusCode};
use axum::Router;
use dotenv::dotenv;
use htycommons::common::current_local_datetime;
use htycommons::jwt::jwt_encode_token;
use htycommons::redis_util::{get_token_expiration_days, save_token_with_exp_days};
use htycommons::web::HtyToken;
use http_body_util::BodyExt;
use serde_json::{json, Value};
use tower::util::ServiceExt;

fn setup() -> Router {
    dotenv().ok();
    std::env::set_var("POOL_SIZE", "1");
    let db_url = std::env::var("KC_DB_URL")
        .unwrap_or_else(|_| "postgres://htykc:htykc@localhost:5432/htykc_test".to_string());
    htykc::clazz_router(&db_url)
}

fn build_test_token(with_org_context: bool) -> String {
    std::env::set_var("JWT_KEY", "htykc-e2e-test-jwt-key");
    let token = HtyToken {
        token_id: "test-token-id".to_string(),
        hty_id: Some("teacher-1".to_string()),
        app_id: Some("app-1".to_string()),
        ts: current_local_datetime(),
        roles: None,
        tags: None,
        current_org_id: if with_org_context {
            Some("org-1".to_string())
        } else {
            None
        },
        current_org_role_keys: Some(vec!["TEACHER".to_string()]),
    };
    jwt_encode_token(token).expect("encode test token")
}

fn prepare_verified_token(with_org_context: bool) -> Option<String> {
    let token = build_test_token(with_org_context);
    let decoded = htycommons::jwt::jwt_decode_token(&token.clone()).ok()?;
    let expiration_days = get_token_expiration_days().ok()?;
    if save_token_with_exp_days(&decoded, expiration_days).is_err() {
        return None;
    }
    Some(token)
}

async fn get_with_headers(router: &Router, uri: &str, headers: Vec<(&str, &str)>) -> (StatusCode, Value) {
    let mut request = Request::builder().method("GET").uri(uri);
    for (key, value) in headers {
        request = request.header(key, value);
    }
    let response = router
        .clone()
        .oneshot(request.body(Body::empty()).expect("build request"))
        .await
        .expect("send request");
    let status = response.status();
    let body_bytes = response
        .into_body()
        .collect()
        .await
        .expect("collect body")
        .to_bytes();
    let json_body: Value = serde_json::from_slice(&body_bytes).unwrap_or(Value::Null);
    (status, json_body)
}

async fn post_with_headers(
    router: &Router,
    uri: &str,
    body: Value,
    headers: Vec<(&str, &str)>,
) -> (StatusCode, Value) {
    let mut request = Request::builder()
        .method("POST")
        .uri(uri)
        .header("Content-Type", "application/json");
    for (key, value) in headers {
        request = request.header(key, value);
    }
    let response = router
        .clone()
        .oneshot(
            request
                .body(Body::from(body.to_string()))
                .expect("build request"),
        )
        .await
        .expect("send request");
    let status = response.status();
    let body_bytes = response
        .into_body()
        .collect()
        .await
        .expect("collect body")
        .to_bytes();
    let json_body: Value = serde_json::from_slice(&body_bytes).unwrap_or(Value::Null);
    (status, json_body)
}

#[tokio::test]
async fn test_teacher_hour_stats_requires_current_org_id() {
    let router = match std::panic::catch_unwind(setup) {
        Ok(ok) => ok,
        Err(_) => {
            println!("DB unavailable in current test env, skip stats test");
            return;
        }
    };

    let token = match prepare_verified_token(false) {
        Some(ok) => ok,
        None => {
            println!("Redis unavailable in current test env, skip stats test");
            return;
        }
    };
    let (status, response) = get_with_headers(
        &router,
        "/api/v1/clazz/stats/my-hours?start_date=2026-01-01%2000:00:00&end_date=2026-12-31%2023:59:59",
        vec![
            ("Authorization", token.as_str()),
            ("HtySudoerToken", token.as_str()),
            ("HtyHost", "root"),
        ],
    )
    .await;

    assert_eq!(status, StatusCode::OK, "stats request should return business response envelope");
    assert!(
        !response["r"].as_bool().unwrap_or(true),
        "stats should fail without current_org_id, body: {:?}",
        response
    );
}

#[tokio::test]
async fn test_create_clazz_leave_requires_current_org_id() {
    let router = match std::panic::catch_unwind(setup) {
        Ok(ok) => ok,
        Err(_) => {
            println!("DB unavailable in current test env, skip leave test");
            return;
        }
    };

    let token = match prepare_verified_token(false) {
        Some(ok) => ok,
        None => {
            println!("Redis unavailable in current test env, skip leave test");
            return;
        }
    };
    let (status, response) = post_with_headers(
        &router,
        "/api/v1/clazz/leave/create",
        json!({
            "clazz_id": "clazz-1",
            "student_id": "student-1",
            "teacher_id": "teacher-1",
            "leave_type": "PERSONAL",
            "reason": "test leave request"
        }),
        vec![
            ("Authorization", token.as_str()),
            ("HtySudoerToken", token.as_str()),
            ("HtyHost", "root"),
        ],
    )
    .await;

    assert_eq!(status, StatusCode::OK, "leave request should return business response envelope");
    assert!(
        !response["r"].as_bool().unwrap_or(true),
        "create leave should fail without current_org_id, body: {:?}",
        response
    );
}

#[tokio::test]
async fn test_teacher_hour_stats_with_current_org_id_should_not_fail_on_org_context_check() {
    let router = match std::panic::catch_unwind(setup) {
        Ok(ok) => ok,
        Err(_) => {
            println!("DB unavailable in current test env, skip stats positive test");
            return;
        }
    };

    let token = match prepare_verified_token(true) {
        Some(ok) => ok,
        None => {
            println!("Redis unavailable in current test env, skip stats positive test");
            return;
        }
    };
    let (status, response) = get_with_headers(
        &router,
        "/api/v1/clazz/stats/my-hours?start_date=2026-01-01%2000:00:00&end_date=2026-12-31%2023:59:59",
        vec![
            ("Authorization", token.as_str()),
            ("HtySudoerToken", token.as_str()),
            ("HtyHost", "root"),
        ],
    )
    .await;

    assert_eq!(status, StatusCode::OK, "stats request should return business response envelope");

    let error_text = response
        .get("e")
        .and_then(|error_node| error_node.as_str())
        .unwrap_or_default()
        .to_string();
    assert!(
        !error_text.contains("current_org_id is required"),
        "stats with org context should not hit org-context-missing error, body: {:?}",
        response
    );
}