import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:system_tray/system_tray.dart';
import 'package:window_manager/window_manager.dart';
import 'package:audioplayers/audioplayers.dart';

const Duration popupInterval = Duration(hours: 1);
const String notificationSound = 'MeetTheSniper.mp3';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await windowManager.ensureInitialized();

  WindowOptions windowOptions = const WindowOptions(
    size: Size(1600, 900),
    center: true,
    backgroundColor: Colors.transparent,
    skipTaskbar: false,
    titleBarStyle: TitleBarStyle.normal,
  );

  windowManager.waitUntilReadyToShow(windowOptions, () async {
    await windowManager.hide();
  });

  runApp(const JournalerApp());
}

class JournalerApp extends StatelessWidget {
  const JournalerApp({super.key});

  static final TextTheme _baseTextTheme = const TextTheme(
    bodyMedium: TextStyle(fontSize: 24),
  );

  static final TextStyle _baseTitleTextStyle = const TextStyle(
    fontSize: 20,
    fontWeight: FontWeight.w500,
  );

  static final InputDecorationTheme _baseInputDecorationTheme =
      const InputDecorationTheme(
        border: OutlineInputBorder(),
        labelStyle: TextStyle(fontSize: 20),
      );

  static final ThemeData lightTheme = ThemeData.light().copyWith(
    visualDensity: VisualDensity.adaptivePlatformDensity,
    colorScheme: ColorScheme.fromSeed(
      seedColor: Colors.blue,
      brightness: Brightness.light,
    ),
    scaffoldBackgroundColor: Colors.grey[100],
    appBarTheme: AppBarTheme(
      backgroundColor: Colors.blue,
      foregroundColor: Colors.white,
      titleTextStyle: _baseTitleTextStyle.copyWith(color: Colors.white),
    ),
    inputDecorationTheme: _baseInputDecorationTheme.copyWith(
      focusedBorder: OutlineInputBorder(
        borderSide: BorderSide(color: Colors.blue.shade600, width: 2.0),
      ),
      labelStyle: _baseInputDecorationTheme.labelStyle?.copyWith(
        color: Colors.grey[700],
      ),
    ),
    textTheme: _baseTextTheme,
  );

  static final ThemeData darkTheme = ThemeData.dark().copyWith(
    visualDensity: VisualDensity.adaptivePlatformDensity,
    colorScheme: ColorScheme.fromSeed(
      seedColor: Colors.blue,
      brightness: Brightness.dark,
    ),
    scaffoldBackgroundColor: Colors.grey[900],
    appBarTheme: AppBarTheme(
      backgroundColor: Colors.grey[850],
      foregroundColor: Colors.white,
      titleTextStyle: _baseTitleTextStyle.copyWith(color: Colors.white),
    ),
    inputDecorationTheme: _baseInputDecorationTheme.copyWith(
      border: const OutlineInputBorder(
        borderSide: BorderSide(color: Colors.grey),
      ),
      focusedBorder: OutlineInputBorder(
        borderSide: BorderSide(color: Colors.blue.shade300, width: 2.0),
      ),
      labelStyle: _baseInputDecorationTheme.labelStyle?.copyWith(
        color: Colors.grey[400],
      ),
    ),
    textTheme: _baseTextTheme.copyWith(
      bodyMedium: _baseTextTheme.bodyMedium?.copyWith(color: Colors.white),
    ),
  );

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Journaler',
      theme: lightTheme,
      darkTheme: darkTheme,
      themeMode: ThemeMode.system,
      home: const MainPage(),
      debugShowCheckedModeBanner: false,
    );
  }
}

class MainPage extends StatefulWidget {
  const MainPage({super.key});

  @override
  State<MainPage> createState() => _MainPageState();
}

class _MainPageState extends State<MainPage> with WindowListener {
  final SystemTray _systemTray = SystemTray();
  final AudioPlayer _audioPlayer = AudioPlayer();

  final TextEditingController _previousEntryController =
      TextEditingController();
  final TextEditingController _currentEntryController = TextEditingController();
  final TextEditingController _todoController = TextEditingController();

  Timer? _popupTimer;
  Timer? _debounceTimer;

  @override
  void initState() {
    super.initState();
    windowManager.addListener(this);
    _initSystemTray();
    _loadData();
    _startPopupTimer();
    windowManager.setPreventClose(true);
    _setWindowConfig();
  }

  @override
  void dispose() {
    windowManager.removeListener(this);
    _popupTimer?.cancel();
    _debounceTimer?.cancel();
    _previousEntryController.dispose();
    _currentEntryController.dispose();
    _todoController.dispose();
    _audioPlayer.dispose();
    super.dispose();
  }

  @override
  void onWindowClose() {
    _saveData();
    windowManager.hide();
  }

  @override
  void onWindowFocus() {
    setState(() {});
  }

  Future<void> _initSystemTray() async {
    String iconPath = 'assets/app_icon.ico';

    await _systemTray.initSystemTray(iconPath: iconPath, toolTip: "Journaler");

    _systemTray.registerSystemTrayEventHandler((eventName) {
      debugPrint("System Tray Event: $eventName");
      _showWindow();
    });
  }

  void _startPopupTimer() {
    _popupTimer = Timer.periodic(popupInterval, (timer) {
      _showWindow();
    });
  }

  Future<void> _showWindow() async {
    bool wasVisible = await windowManager.isVisible();
    if (!wasVisible) {
      await windowManager.setSize(const Size(1600, 900));
      await windowManager.center();
      await windowManager.show();
      await windowManager.focus();
      await _playSound();
    } else {
      await windowManager.focus();
    }
  }

  Future<void> _playSound() async {
    try {
      await _audioPlayer.stop();
      await _audioPlayer.play(AssetSource('sounds/$notificationSound'));
      debugPrint("Played sound: $notificationSound");
    } catch (e, stackTrace) {
      debugPrint("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
      debugPrint("Error playing sound '$notificationSound': $e");
      debugPrint("Stack trace: $stackTrace");
      debugPrint(
        "Ensure file exists, is valid audio, and assets/sounds/ is in pubspec.yaml",
      );
      debugPrint("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
    }
  }

  void _loadData() {
    _previousEntryController.text =
        "This is a placeholder for the previous entry.";
    _todoController.text = "- Placeholder Todo 1\n- Placeholder Todo 2";
    _currentEntryController.text = "";
    debugPrint("Data loaded (placeholder).");
  }

  void _saveData() {
    String currentEntry = _currentEntryController.text;
    String todoList = _todoController.text;

    print(
      "Saving data (placeholder)... Current Entry: [${currentEntry.length} chars], Todo: [${todoList.length} chars]",
    );
  }

  void _saveTodoList() {
    if (_debounceTimer?.isActive ?? false) _debounceTimer!.cancel();

    _debounceTimer = Timer(const Duration(milliseconds: 500), () {
      String todoList = _todoController.text;
      print("Debounced Save: Saving Todo list... [${todoList.length} chars]");
    });
  }

  Future<void> _setWindowConfig() async {
    await windowManager.setAspectRatio(16 / 9);
  }

  @override
  Widget build(BuildContext context) {
    return KeyboardListener(
      focusNode: FocusNode(),
      autofocus: true,
      onKeyEvent: (event) {
        if (event is KeyDownEvent &&
            event.logicalKey == LogicalKeyboardKey.escape) {
          debugPrint("Escape key pressed - hiding window.");
          windowManager.hide();
        }
      },
      child: Scaffold(
        appBar: AppBar(title: const Text('Journaler'), actions: const []),
        body: Padding(
          padding: const EdgeInsets.all(8.0),
          child: Row(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Expanded(
                flex: 9,
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.stretch,
                  children: [
                    Expanded(
                      child: TextField(
                        controller: _previousEntryController,
                        maxLines: null,
                        expands: true,
                        style: Theme.of(context).textTheme.bodyMedium,
                        decoration: const InputDecoration(
                          labelText: 'Previous Entry',
                        ),
                      ),
                    ),
                    const SizedBox(height: 8),
                    Expanded(
                      child: TextField(
                        controller: _currentEntryController,
                        maxLines: null,
                        expands: true,
                        autofocus: true,
                        style: Theme.of(context).textTheme.bodyMedium,
                        decoration: const InputDecoration(
                          labelText: 'Current Entry (What\'s on your mind?)',
                        ),
                        onChanged: (text) {},
                      ),
                    ),
                  ],
                ),
              ),
              const SizedBox(width: 8),
              Expanded(
                flex: 3,
                child: TextField(
                  controller: _todoController,
                  maxLines: null,
                  expands: true,
                  style:
                      Theme.of(
                        context,
                      ).textTheme.bodyMedium, // Apply theme text style
                  decoration: const InputDecoration(
                    labelText: 'Todo List',
                    // border: OutlineInputBorder(), // Handled by theme
                    // contentPadding: EdgeInsets.all(8.0), // Handled by theme or default
                  ),
                  onChanged: (text) {
                    // Auto-save Todo list changes (consider debouncing)
                    _saveTodoList();
                  },
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}