use std::fs;
use std::process::Command;
use std::thread::sleep;
use std::time::Duration;
use windows::Win32::System::Console;
use windows::Win32::Foundation::HWND;

fn hide_console() {
    unsafe {
        let console = Console::GetConsoleWindow();
        if console != HWND::default() {
            let _ = Console::FreeConsole();
        }
    }
}

fn main() {
    // 隐藏控制台窗口
    hide_console();
    
    // 检查是否已有 BootLoader 进程在运行
    if is_process_running("BootLoader.exe") {
        return;
    }
    
    // 获取 BootLoader 启动目录所在盘的 AppData 目录
    let appdata_dir = get_appdata_dir();
    
    // 构建 Updater 相关文件路径
    let updater_exe = appdata_dir.join("Updater.exe");
    let updater_new_exe = appdata_dir.join("Updater.new.exe");
    
    // 检查 Updater.new.exe 是否存在
    if !updater_new_exe.exists() {
        return;
    }
    
    // 等待 Updater 进程退出
    wait_for_process_exit("Updater.exe");
    
    // 直接覆盖 Updater.exe（fs::rename 在 Windows 上会自动替换已存在的文件）
    fs::rename(&updater_new_exe, &updater_exe).expect("Failed to rename Updater.new.exe to Updater.exe");
    
    // 启动 Updater.exe
    Command::new(updater_exe)
        .spawn()
        .expect("Failed to start Updater.exe");
}

fn is_process_running(process_name: &str) -> bool {
    let output = Command::new("tasklist")
        .args(["/FI", &format!("IMAGENAME eq {}", process_name)])
        .output()
        .expect("Failed to execute tasklist");
    
    let output_str = String::from_utf8_lossy(&output.stdout);
    output_str.contains(process_name)
}

fn get_appdata_dir() -> std::path::PathBuf {
    let exe_path = std::env::current_exe().expect("Failed to get executable path");
    let drive = if let Some(parent) = exe_path.parent() {
        let drive = parent.as_os_str().to_str().unwrap_or("C:/").split('\\').next().unwrap_or("C:");
        std::path::Path::new(&format!("{}/", drive)).to_path_buf()
    } else {
        std::path::Path::new("C:/").to_path_buf()
    };
    drive.join("AppData").join("Updater")
}

fn wait_for_process_exit(process_name: &str) {
    loop {
        // 使用 tasklist 命令检查进程是否存在
        let output = Command::new("tasklist")
            .args(["/FI", &format!("IMAGENAME eq {}", process_name)])
            .output()
            .expect("Failed to execute tasklist");
        
        let output_str = String::from_utf8_lossy(&output.stdout);
        if !output_str.contains(process_name) {
            break;
        }
        
        // 等待 100 毫秒后再次检查
        sleep(Duration::from_millis(100));
    }
}