mod cmd;
mod config;
mod core;
mod enhance;
mod feat;
mod module;
mod process;
mod state;
mod utils;
use crate::{
    core::hotkey,
    process::AsyncHandler,
    utils::{resolve, resolve::resolve_scheme, server},
};
use config::Config;
use std::sync::{Mutex, Once};
use tauri::AppHandle;
use tauri::Manager;
#[cfg(target_os = "macos")]
use tauri_plugin_autostart::MacosLauncher;
use tauri_plugin_deep_link::DeepLinkExt;
use tokio::time::{timeout, Duration};
use utils::logging::Type;

/// A global singleton handle to the application.
pub struct AppHandleManager {
    inner: Mutex<Option<AppHandle>>,
    init: Once,
}

impl AppHandleManager {
    /// Get the global instance of the app handle manager.
    pub fn global() -> &'static Self {
        static INSTANCE: AppHandleManager = AppHandleManager {
            inner: Mutex::new(None),
            init: Once::new(),
        };
        &INSTANCE
    }

    /// Initialize the app handle manager with an app handle.
    pub fn init(&self, handle: AppHandle) {
        self.init.call_once(|| {
            let mut app_handle = self.inner.lock().unwrap();
            *app_handle = Some(handle);
        });
    }

    /// Get the app handle if it has been initialized.
    pub fn get(&self) -> Option<AppHandle> {
        self.inner.lock().unwrap().clone()
    }

    /// Get the app handle, panics if it hasn't been initialized.
    pub fn get_handle(&self) -> AppHandle {
        self.get().expect("AppHandle not initialized")
    }

    pub fn set_activation_policy_regular(&self) {
        #[cfg(target_os = "macos")]
        {
            let app_handle = self.inner.lock().unwrap();
            let app_handle = app_handle.as_ref().unwrap();
            let _ = app_handle.set_activation_policy(tauri::ActivationPolicy::Regular);
        }
    }

    pub fn set_activation_policy_accessory(&self) {
        #[cfg(target_os = "macos")]
        {
            let app_handle = self.inner.lock().unwrap();
            let app_handle = app_handle.as_ref().unwrap();
            let _ = app_handle.set_activation_policy(tauri::ActivationPolicy::Accessory);
        }
    }

    pub fn set_activation_policy_prohibited(&self) {
        #[cfg(target_os = "macos")]
        {
            let app_handle = self.inner.lock().unwrap();
            let app_handle = app_handle.as_ref().unwrap();
            let _ = app_handle.set_activation_policy(tauri::ActivationPolicy::Prohibited);
        }
    }
}

#[allow(clippy::panic)]
pub fn run() {
    utils::network::NetworkManager::global().init();

    let _ = utils::dirs::init_portable_flag();

    // 单例检测
    let app_exists: bool = AsyncHandler::block_on(move || async move {
        logging!(info, Type::Setup, true, "开始检查单例实例...");
        match timeout(Duration::from_secs(3), server::check_singleton()).await {
            Ok(result) => {
                if result.is_err() {
                    logging!(info, Type::Setup, true, "检测到已有应用实例运行");
                    true
                } else {
                    logging!(info, Type::Setup, true, "未检测到其他应用实例");
                    false
                }
            }
            Err(_) => {
                logging!(
                    warn,
                    Type::Setup,
                    true,
                    "单例检查超时，假定没有其他实例运行"
                );
                false
            }
        }
    });
    if app_exists {
        return;
    }

    #[cfg(target_os = "linux")]
    std::env::set_var("WEBKIT_DISABLE_DMABUF_RENDERER", "1");

    #[cfg(debug_assertions)]
    let devtools = tauri_plugin_devtools::init();

    #[allow(unused_mut)]
    let mut builder = tauri::Builder::default()
        .plugin(tauri_plugin_updater::Builder::new().build())
        .plugin(tauri_plugin_clipboard_manager::init())
        .plugin(tauri_plugin_process::init())
        .plugin(tauri_plugin_global_shortcut::Builder::new().build())
        .plugin(tauri_plugin_fs::init())
        .plugin(tauri_plugin_dialog::init())
        .plugin(tauri_plugin_shell::init())
        .plugin(tauri_plugin_deep_link::init())
        .setup(|app| {
            logging!(info, Type::Setup, true, "开始应用初始化...");
            let mut auto_start_plugin_builder = tauri_plugin_autostart::Builder::new();
            #[cfg(target_os = "macos")]
            {
                auto_start_plugin_builder = auto_start_plugin_builder
                    .macos_launcher(MacosLauncher::LaunchAgent)
                    .app_name(app.config().identifier.clone());
            }
            let _ = app.handle().plugin(auto_start_plugin_builder.build());

            #[cfg(any(target_os = "linux", all(debug_assertions, windows)))]
            {
                use tauri_plugin_deep_link::DeepLinkExt;
                logging!(info, Type::Setup, true, "注册深层链接...");
                logging_error!(Type::System, true, app.deep_link().register_all());
            }

            app.deep_link().on_open_url(|event| {
                AsyncHandler::spawn(move || {
                    let url = event.urls().first().map(|u| u.to_string());
                    async move {
                        if let Some(url) = url {
                            logging_error!(Type::Setup, true, resolve_scheme(url).await);
                        }
                    }
                });
            });

            // 异步处理
            let app_handle = app.handle().clone();
            AsyncHandler::spawn(move || async move {
                logging!(info, Type::Setup, true, "异步执行应用设置...");
                match timeout(
                    Duration::from_secs(30),
                    resolve::resolve_setup_async(&app_handle),
                )
                .await
                {
                    Ok(_) => {
                        logging!(info, Type::Setup, true, "应用设置成功完成");
                    }
                    Err(_) => {
                        logging!(
                            error,
                            Type::Setup,
                            true,
                            "应用设置超时(30秒)，继续执行后续流程"
                        );
                    }
                }
            });

            logging!(info, Type::Setup, true, "执行主要设置操作...");

            logging!(info, Type::Setup, true, "初始化AppHandleManager...");
            AppHandleManager::global().init(app.handle().clone());

            logging!(info, Type::Setup, true, "初始化核心句柄...");
            core::handle::Handle::global().init(app.handle());

            logging!(info, Type::Setup, true, "初始化配置...");
            if let Err(e) = utils::init::init_config() {
                logging!(error, Type::Setup, true, "初始化配置失败: {}", e);
            }

            logging!(info, Type::Setup, true, "初始化资源...");
            if let Err(e) = utils::init::init_resources() {
                logging!(error, Type::Setup, true, "初始化资源失败: {}", e);
            }

            app.manage(Mutex::new(state::proxy::CmdProxyState::default()));

            logging!(info, Type::Setup, true, "初始化完成，继续执行");
            Ok(())
        })
        .invoke_handler(tauri::generate_handler![
            // common
            cmd::get_sys_proxy,
            cmd::get_auto_proxy,
            cmd::open_app_dir,
            cmd::open_logs_dir,
            cmd::open_web_url,
            cmd::open_core_dir,
            cmd::get_portable_flag,
            cmd::get_network_interfaces,
            cmd::get_system_hostname,
            cmd::restart_app,
            // 内核管理
            cmd::start_core,
            cmd::stop_core,
            cmd::restart_core,
            // 启动命令
            cmd::notify_ui_ready,
            cmd::update_ui_stage,
            cmd::reset_ui_ready_state,
            cmd::get_running_mode,
            cmd::get_app_uptime,
            cmd::get_auto_launch_status,
            cmd::is_admin,
            // 添加轻量模式相关命令
            cmd::entry_lightweight_mode,
            cmd::exit_lightweight_mode,
            // service 管理
            cmd::install_service,
            cmd::uninstall_service,
            cmd::reinstall_service,
            cmd::repair_service,
            cmd::is_service_available,
            // clash
            cmd::get_clash_info,
            cmd::patch_clash_config,
            cmd::patch_clash_mode,
            cmd::change_clash_core,
            cmd::get_runtime_config,
            cmd::get_runtime_yaml,
            cmd::get_runtime_exists,
            cmd::get_runtime_logs,
            cmd::invoke_uwp_tool,
            cmd::copy_clash_env,
            cmd::get_proxies,
            cmd::get_providers_proxies,
            cmd::save_dns_config,
            cmd::apply_dns_config,
            cmd::check_dns_config_exists,
            cmd::get_dns_config_content,
            cmd::validate_dns_config,
            // verge
            cmd::get_verge_config,
            cmd::patch_verge_config,
            cmd::test_delay,
            cmd::get_app_dir,
            cmd::copy_icon_file,
            cmd::download_icon_cache,
            cmd::open_devtools,
            cmd::exit_app,
            cmd::get_network_interfaces_info,
            // profile
            cmd::get_profiles,
            cmd::enhance_profiles,
            cmd::patch_profiles_config,
            cmd::view_profile,
            cmd::patch_profile,
            cmd::create_profile,
            cmd::import_profile,
            cmd::reorder_profile,
            cmd::update_profile,
            cmd::delete_profile,
            cmd::read_profile_file,
            cmd::save_profile_file,
            cmd::get_next_update_time,
            // script validation
            cmd::script_validate_notice,
            cmd::validate_script_file,
            // clash api
            cmd::clash_api_get_proxy_delay,
            // backup
            cmd::create_webdav_backup,
            cmd::save_webdav_config,
            cmd::list_webdav_backup,
            cmd::delete_webdav_backup,
            cmd::restore_webdav_backup,
            // export diagnostic info for issue reporting
            cmd::export_diagnostic_info,
            // get system info for display
            cmd::get_system_info,
            // media unlock checker
            cmd::get_unlock_items,
            cmd::check_media_unlock,
            // light-weight model
            cmd::entry_lightweight_mode,
        ]);

    #[cfg(debug_assertions)]
    {
        builder = builder.plugin(devtools);
    }

    // Macos Application Menu
    #[cfg(target_os = "macos")]
    {
        // Temporary Achived due to cannot CMD+C/V/A
    }

    let app = builder
        .build(tauri::generate_context!())
        .expect("error while running tauri application");

    app.run(|app_handle, e| match e {
        tauri::RunEvent::Ready | tauri::RunEvent::Resumed => {
            logging!(info, Type::System, true, "应用就绪或恢复");
            AppHandleManager::global().init(app_handle.clone());
            #[cfg(target_os = "macos")]
            {
                if let Some(window) = AppHandleManager::global()
                    .get_handle()
                    .get_webview_window("main")
                {
                    logging!(info, Type::Window, true, "设置macOS窗口标题");
                    let _ = window.set_title("Clash Verge");
                }
            }
        }
        #[cfg(target_os = "macos")]
        tauri::RunEvent::Reopen {
            has_visible_windows,
            ..
        } => {
            if !has_visible_windows {
                AppHandleManager::global().set_activation_policy_regular();
            }
            AppHandleManager::global().init(app_handle.clone());
        }
        tauri::RunEvent::ExitRequested { api, code, .. } => {
            if code.is_none() {
                api.prevent_exit();
            }
        }
        tauri::RunEvent::Exit => {
            // avoid duplicate cleanup
            if core::handle::Handle::global().is_exiting() {
                return;
            }
            feat::clean();
        }
        tauri::RunEvent::WindowEvent { label, event, .. } => {
            if label == "main" {
                match event {
                    tauri::WindowEvent::CloseRequested { api, .. } => {
                        #[cfg(target_os = "macos")]
                        AppHandleManager::global().set_activation_policy_accessory();
                        if core::handle::Handle::global().is_exiting() {
                            return;
                        }
                        println!("closing window...");
                        api.prevent_close();
                        if let Some(window) = core::handle::Handle::global().get_window() {
                            let _ = window.hide();
                        } else {
                            logging!(warn, Type::Window, true, "尝试隐藏窗口但窗口不存在");
                        }
                    }
                    tauri::WindowEvent::Focused(true) => {
                        #[cfg(target_os = "macos")]
                        {
                            logging_error!(
                                Type::Hotkey,
                                true,
                                hotkey::Hotkey::global().register("CMD+Q", "quit")
                            );
                            logging_error!(
                                Type::Hotkey,
                                true,
                                hotkey::Hotkey::global().register("CMD+W", "hide")
                            );
                        }
                        {
                            let is_enable_global_hotkey = Config::verge()
                                .latest()
                                .enable_global_hotkey
                                .unwrap_or(true);
                            if !is_enable_global_hotkey {
                                logging_error!(Type::Hotkey, true, hotkey::Hotkey::global().init())
                            }
                        }
                    }
                    tauri::WindowEvent::Focused(false) => {
                        #[cfg(target_os = "macos")]
                        {
                            logging_error!(
                                Type::Hotkey,
                                true,
                                hotkey::Hotkey::global().unregister("CMD+Q")
                            );
                            logging_error!(
                                Type::Hotkey,
                                true,
                                hotkey::Hotkey::global().unregister("CMD+W")
                            );
                        }
                        {
                            let is_enable_global_hotkey = Config::verge()
                                .latest()
                                .enable_global_hotkey
                                .unwrap_or(true);
                            if !is_enable_global_hotkey {
                                logging_error!(Type::Hotkey, true, hotkey::Hotkey::global().reset())
                            }
                        }
                    }
                    tauri::WindowEvent::Destroyed => {
                        #[cfg(target_os = "macos")]
                        {
                            logging_error!(
                                Type::Hotkey,
                                true,
                                hotkey::Hotkey::global().unregister("CMD+Q")
                            );
                            logging_error!(
                                Type::Hotkey,
                                true,
                                hotkey::Hotkey::global().unregister("CMD+W")
                            );
                        }
                    }
                    _ => {}
                }
            }
        }
        _ => {}
    });
}