import 'dart:io';

import 'package:tray_manager/tray_manager.dart';
import 'package:window_manager/window_manager.dart';

import '../agent.dart';

/// 后台托盘：点窗口关闭按钮 = 隐藏窗口进后台（服务继续运行），
/// 托盘常驻（mac 菜单栏 template 图标 / Windows 系统托盘彩色图标），
/// 单击/双击托盘恢复窗口，右键弹菜单，退出入口只放在托盘菜单里。
class AppTray with TrayListener, WindowListener {
  AppTray({required this.agent});

  final Agent agent;

  static const _menuShow = 'menu_show';
  static const _menuExit = 'menu_exit';

  bool _started = false;

  Future<void> start() async {
    if (_started) return;
    _started = true;
    windowManager.addListener(this);
    await windowManager.setPreventClose(true);

    await trayManager.setIcon(
      Platform.isMacOS ? 'assets/tray_icon_mac.png' : 'assets/tray_icon_win.ico',
    );
    await trayManager.setToolTip('资安信插件助手 · 饭卡打印（后台运行中）');
    await trayManager.setContextMenu(_menu);
    trayManager.addListener(this);
    agent.log.write('托盘已就绪：关闭窗口将最小化到托盘，服务持续运行');
  }

  // ---------------- 窗口事件 ----------------

  @override
  void onWindowClose() async {
    // 关窗不退出：隐藏窗口，服务与托盘保持运行
    await windowManager.hide();
  }

  // ---------------- 托盘事件 ----------------

  @override
  void onTrayIconMouseDown() => _showWindow();

  @override
  void onTrayIconRightMouseDown() {
    trayManager.popUpContextMenu();
  }

  @override
  void onTrayMenuItemClick(MenuItem menuItem) async {
    switch (menuItem.key) {
      case _menuShow:
        await _showWindow();
      case _menuExit:
        await _exitApp();
    }
  }

  Menu get _menu => Menu(
        items: [
          MenuItem(key: _menuShow, label: '显示主界面'),
          MenuItem.separator(),
          MenuItem(key: _menuExit, label: '退出'),
        ],
      );

  Future<void> _showWindow() async {
    await windowManager.show();
    await windowManager.focus();
  }

  Future<void> _exitApp() async {
    agent.log.write('用户从托盘退出，停止服务');
    await agent.stop();
    await trayManager.destroy();
    await windowManager.destroy();
  }
}