// Prevents additional console window on Windows in release, DO NOT REMOVE!!
#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]

mod commands;
mod steam_auth;
mod browser_automation;
mod api_client;
mod config;
mod key_storage;
mod machine;
mod storage;
mod updater;
mod auto_updater;
mod error;
mod security;
mod heartbeat;
mod app_logger;

use commands::*;
use browser_automation::*;
use api_client::{ApiConfig as BackendApiConfig, initialize_api_client};
use config::*;
use tauri::Manager;

// 在最开头初始化日志系统（任何 panic 都要捕获）
fn init_logging() {
    // 初始化应用日志系统（每日一个日志文件，写在 exe 同目录下）
    if let Err(e) = app_logger::init_app_logger() {
        eprintln!("Failed to init app logger: {}", e);
    }
    // 设置 panic hook + Windows 顶层异常处理器，确保程序崩溃时把堆栈信息写入日志文件
    app_logger::setup_all_crash_handlers();
}

fn main() {
    // 最优先初始化日志（panic hook 必须在任何可能 panic 之前设置）
    init_logging();

    app_logger::info("应用主程序开始启动...");

    // --- 单实例检测：防止同一台电脑启动多个窗口 ---
    #[cfg(target_os = "windows")]
    {
        use std::ffi::OsStr;
        use std::os::windows::ffi::OsStrExt;
        use std::ptr;

        const MUTEX_NAME: &str = "SteamSH_SingleInstance_Mutex_v1";

        let mutex_name_wide: Vec<u16> = OsStr::new(MUTEX_NAME)
            .encode_wide()
            .chain(std::iter::once(0))
            .collect();

        unsafe {
            let handle = winapi::um::synchapi::CreateMutexW(
                ptr::null_mut(),
                0,  // bInitialOwner = false，新实例不会获得锁的拥有权
                mutex_name_wide.as_ptr(),
            );

            if !handle.is_null() {
                // 检查是否已有互斥量（即已有实例运行）
                let already_exists = winapi::um::errhandlingapi::GetLastError()
                    == winapi::shared::winerror::ERROR_ALREADY_EXISTS;

                if already_exists {
                    // 已有实例运行，尝试激活它的主窗口，然后退出当前进程
                    app_logger::warn("检测到已有实例正在运行，激活已有窗口并退出当前进程");

                    // 尝试通过 FindWindow 找到并激活已有窗口
                    let class_name: Vec<u16> = OsStr::new("SteamSH")
                        .encode_wide()
                        .chain(std::iter::once(0))
                        .collect();
                    let title: Vec<u16> = OsStr::new("steam扫货（磨损版）")
                        .encode_wide()
                        .chain(std::iter::once(0))
                        .collect();

                    // 先尝试通过窗口类名找
                    let hwnd = winapi::um::winuser::FindWindowW(class_name.as_ptr(), ptr::null());
                    let hwnd = if hwnd.is_null() {
                        // 再尝试通过窗口标题找
                        winapi::um::winuser::FindWindowW(ptr::null(), title.as_ptr())
                    } else {
                        hwnd
                    };

                    if !hwnd.is_null() {
                        // 激活窗口并置于前台
                        winapi::um::winuser::SetForegroundWindow(hwnd);
                        winapi::um::winuser::ShowWindow(hwnd, winapi::um::winuser::SW_RESTORE);
                        winapi::um::winuser::BringWindowToTop(hwnd);
                    }

                    // 关闭 mutex 句柄并退出
                    winapi::um::handleapi::CloseHandle(handle);
                    std::process::exit(0);
                }

                // 记录 mutex 句柄，在程序结束时关闭（通过 drop 或 at_exit）
                // 为确保程序结束时释放 mutex，这里用 Box::leak 存起来，
                // 让它在进程结束时由 OS 自动释放（进程退出时内核自动关闭所有句柄）
                Box::leak(Box::new(handle));
            }
        }
    }
    // --- 单实例检测结束 ---
    // 阶段二：安全检查
    if let Err(e) = security::perform_all_security_checks() {
        app_logger::error(&format!("安全检查失败: {}", e));
        // 在生产环境中，安全检查失败应该显示错误信息后退出
        if !cfg!(debug_assertions) {
            // 显示友好的错误对话框
            #[cfg(target_os = "windows")]
            {
                use std::ffi::OsStr;
                use std::os::windows::ffi::OsStrExt;

                let msg: Vec<u16> = OsStr::new(&format!("安全检查失败:\n{}\n\n请检查系统环境后重试。\n\n详细信息请查看日志文件。", e))
                    .encode_wide()
                    .chain(Some(0))
                    .collect();
                let title: Vec<u16> = OsStr::new("SteamSH 启动失败")
                    .encode_wide()
                    .chain(Some(0))
                    .collect();

                unsafe {
                    extern "system" {
                        fn MessageBoxW(hwnd: *mut std::ffi::c_void, text: *const u16, caption: *const u16, utype: u32) -> i32;
                    }
                    const MB_ICONERROR: u32 = 0x10;
                    const MB_OK: u32 = 0x0;
                    const MB_TOPMOST: u32 = 0x40000;
                    MessageBoxW(std::ptr::null_mut(), msg.as_ptr(), title.as_ptr(), MB_ICONERROR | MB_OK | MB_TOPMOST);
                }
            }
            std::process::exit(1);
        }
    }
    app_logger::info("安全检查通过");

    // 初始化存储系统
    if let Err(e) = storage::init_storage() {
        app_logger::error(&format!("Failed to initialize storage: {}", e));
        // 存储初始化失败不应该阻止程序启动
    }

    // 初始化应用配置和API客户端
    let app_config = AppConfig::load().unwrap_or_else(|e| {
        app_logger::error(&format!("Failed to load config: {}, using defaults", e));
        AppConfig::default()
    });

    // 初始化API客户端
    let api_config = BackendApiConfig {
        base_url: app_config.api.base_url.clone(),
        timeout: app_config.api.timeout,
        software_code: app_config.api.software_code.clone(),
    };

    if let Err(e) = initialize_api_client(api_config) {
        app_logger::error(&format!("Failed to initialize API client: {}", e));
        // API客户端初始化失败也不阻止程序启动，用户可以在运行时重新配置
    }

    tauri::Builder::default()
        .invoke_handler(tauri::generate_handler![
            // Steam本地功能
            generate_steam_code,
            fetch_confirmations,
            accept_confirmation,
            deny_confirmation,
                save_steam_account,
            load_steam_accounts,
            launch_browser_session,
            execute_automated_shopping,
                // project-local steam-msg commands
                save_steam_guard_file,
                save_steam_account_to_project,
                list_project_steam_accounts,
                delete_project_steam_account,
                update_account_is_us_account,
                export_mafile_to_path,
                get_steam_wallet_balance,
                read_proxy_config,
                write_proxy_config,
                test_proxy_configuration,
                invalidate_proxy,
                get_proxy_pool_status,
                refill_proxy_pool,
                verify_steam_login,
            // 后端API调用
            initialize_backend_api,
            user_register,
            user_login,
            user_unbind,
            user_recharge,
            user_heartbeat,
            secure_heartbeat,
            user_logout,
            activate_card,
            get_steam_account_limit,
            get_steam_accounts,
            create_steam_account,
            bind_steam_account,
            update_steam_account,
            delete_steam_account,
            get_announcements,
            health_check,
            get_public_key,
            get_client_configs,
            // 配置管理
            get_app_config,
            update_api_url,
            get_api_base_url,
            // 机器码和存储
            get_machine_code,
            store_user_info,
            get_stored_user_info,
            get_current_username,
            get_user_profile,
            get_system_username,
            clear_stored_user_info,
            minimize_window,
            close_window,
            stop_all_processes,
            rsa_encrypt_aes_key,
            secure_get_announcements,
            secure_user_login,
            secure_user_register,
            forgot_password_request,
            secure_user_unbind,
            secure_user_change_password,
            secure_user_recharge,
            secure_client_version_check,
            store_rsa_public_key,
            has_stored_rsa_key,
            clear_stored_rsa_key,
            rsa_encrypt_aes_key_by_stored_key,
            get_rsa_key_version,
            // 安全通信模块命令
            initialize_security_client,
            check_security_initialized,
            get_security_status,
            refresh_security_keys,
            reset_security_client,
            sync_hmac_key,
            secure_buff_filter_options,
            secure_buff_goods_attr_list,
            secure_buff_selection_config,
            secure_buff_selection_start,
            secure_buff_selection_log,
            secure_buff_selection_result,
            secure_buff_selection_item_delete,
            secure_buff_selection_stop,
            batch_import_buff_selection_items,
            secure_buff_sweep_bound_steam_usernames,
            secure_buff_sweep_start,
            spawn_buff_sweep_local_runner,
            secure_buff_sweep_stop,
            secure_buff_sweep_log,
            secure_buff_sweep_result,
            secure_buff_sweep_append_success_item,
            // 本地扫货成功数据存储
            read_local_sweep_logs,
            read_sweep_worker_log,
            read_sweep_worker_backup_log,
            get_sweep_worker_log_files,
            read_local_sweep_success_items,
            read_steam_account_sweep_items,
            add_local_sweep_success_item,
            add_demo_sweep_success_item,
            secure_keys_hmac,
            // 密钥管理命令
            get_key_manager_status,
            get_hmac_key_status,
            // 心跳管理命令
            get_heartbeat_state_command,
            stop_heartbeat_command,
            get_heartbeat_config_command,
            read_text_file,
            // 更新相关
            updater::check_for_updates,
            updater::manual_update_check,
            updater::start_manual_update,
            // 自动更新相关（自定义实现）
            auto_updater::get_current_exe_path,
            auto_updater::get_exe_directory,
            auto_updater::download_update,
            auto_updater::verify_exe,
            auto_updater::execute_update_and_restart,
            auto_updater::check_pending_update,
            auto_updater::cleanup_update_files,
            // 日志相关
            get_app_log_path
        ])
        .setup(|app| {
            heartbeat::set_app_handle(app.handle().clone());

            // 开发者工具在发布版本中禁用
            // 如需调试，可通过环境变量 TAURI_DEVTOOLS=1 在 release 中启用

            Ok(())
        })
        .run(tauri::generate_context!())
        .unwrap_or_else(|e| {
            let err_msg = format!("Tauri application error: {}", e);
            app_logger::error(&err_msg);

            // 显示友好的错误对话框
            #[cfg(target_os = "windows")]
            {
                use std::ffi::OsStr;
                use std::os::windows::ffi::OsStrExt;

                let msg: Vec<u16> = OsStr::new(&format!("应用启动失败:\n{}\n\n详细信息请查看日志文件。", e))
                    .encode_wide()
                    .chain(Some(0))
                    .collect();
                let title: Vec<u16> = OsStr::new("SteamSH 启动失败")
                    .encode_wide()
                    .chain(Some(0))
                    .collect();

                unsafe {
                    extern "system" {
                        fn MessageBoxW(hwnd: *mut std::ffi::c_void, text: *const u16, caption: *const u16, utype: u32) -> i32;
                    }
                    const MB_ICONERROR: u32 = 0x10;
                    const MB_OK: u32 = 0x0;
                    const MB_TOPMOST: u32 = 0x40000;
                    MessageBoxW(std::ptr::null_mut(), msg.as_ptr(), title.as_ptr(), MB_ICONERROR | MB_OK | MB_TOPMOST);
                }
            }

            std::process::exit(1);
        });
}