//! server 控制客户端集成测试：真实 run_server 加五类请求响应加关闭确认加
//! 文件删除断言。
//!
//! 只用临时路径（经 `send_control_request_from` 注入），不触碰 well-known
//! 全局单例。

use std::fs;
use std::time::{Duration, Instant};

use oxide_cli::server::client::send_control_request_from;
use oxide_cli::server::protocol::{ServerRequest, ServerResponse};
use oxide_cli::server::server::{run_server, ServerConfig};

/// 临时路径配置：进程号加测试名唯一，worker 数 2，版本取构建期版本。
fn test_config(test_name: &str) -> ServerConfig {
    let dir = std::env::temp_dir().join(format!("oxide_server_client_test_{}_{}", std::process::id(), test_name));
    fs::create_dir_all(&dir).expect("测试目录创建应成功");
    ServerConfig {
        socket_path: dir.join("server.sock"),
        sidecar_path: dir.join("sidecar.json"),
        worker_count: 2,
        version: env!("CARGO_PKG_VERSION").to_string(),
    }
}

/// 后台线程起真实 run_server，等 socket 文件出现（bind 成功即就绪）。
fn start_server(config: ServerConfig) -> std::thread::JoinHandle<Result<(), oxide_cli::server::server::ServerError>> {
    let server_config = config.clone();
    let handle = std::thread::spawn(move || run_server(&server_config));
    let deadline = Instant::now() + Duration::from_secs(10);
    while !config.socket_path.exists() {
        assert!(Instant::now() < deadline, "socket 文件未出现");
        std::thread::sleep(Duration::from_millis(10));
    }
    handle
}

/// 端到端：真实 server 依次应答五类控制请求，关闭确认后线程退出、文件被删。
#[test]
fn control_client_end_to_end() {
    let config = test_config("e2e");
    let handle = start_server(config.clone());

    // 版本请求：版本与构建期版本一致。
    let response = send_control_request_from(&config.sidecar_path, &ServerRequest::Version).expect("版本请求应成功");
    match response {
        ServerResponse::Version { version } => {
            assert_eq!(version, env!("CARGO_PKG_VERSION"), "版本应与构建期版本一致");
        }
        other => panic!("应得 Version 帧，实得 {other:?}"),
    }

    // 状态请求：worker 池异步预热，轮询至总数不小于 1 后核对字段。
    let deadline = Instant::now() + Duration::from_secs(5);
    let response = loop {
        let response =
            send_control_request_from(&config.sidecar_path, &ServerRequest::Status).expect("状态请求应成功");
        if let ServerResponse::Status { pool_total, .. } = &response {
            if *pool_total >= 1 {
                break response;
            }
        }
        assert!(Instant::now() < deadline, "worker 池预热应完成");
        std::thread::sleep(Duration::from_millis(10));
    };
    match response {
        ServerResponse::Status { pool_available, pool_total, .. } => {
            assert!(pool_available <= pool_total, "可用数应不超过总数：{pool_available}/{pool_total}");
            assert!(pool_total >= 1, "总数应不小于 1：{pool_total}");
        }
        other => panic!("应得 Status 帧，实得 {other:?}"),
    }

    // 健康请求：healthy 为真。
    let response = send_control_request_from(&config.sidecar_path, &ServerRequest::Health).expect("健康请求应成功");
    assert!(
        matches!(response, ServerResponse::Health { healthy: true }),
        "healthy 应为真：{response:?}"
    );

    // 信息请求：socket 路径与配置一致、进程号为当前进程号。
    let response = send_control_request_from(&config.sidecar_path, &ServerRequest::Info).expect("信息请求应成功");
    match response {
        ServerResponse::Info { socket_path, pid, .. } => {
            assert_eq!(socket_path, config.socket_path.to_string_lossy().into_owned(), "socket 路径应与配置一致");
            assert_eq!(pid, std::process::id(), "进程号应为当前进程号");
        }
        other => panic!("应得 Info 帧，实得 {other:?}"),
    }

    // 关闭请求：得确认帧，server 线程正常退出，socket 与 sidecar 文件均被删。
    let response =
        send_control_request_from(&config.sidecar_path, &ServerRequest::Shutdown).expect("关闭请求应成功");
    assert!(
        matches!(response, ServerResponse::Shutdown),
        "应得关闭确认帧：{response:?}"
    );
    let result = handle.join().expect("server 线程应正常退出");
    assert!(result.is_ok(), "server 应正常退出：{result:?}");
    assert!(!config.socket_path.exists(), "socket 文件应被删除");
    assert!(!config.sidecar_path.exists(), "sidecar 文件应被删除");
}