import 'package:flutter/material.dart';
import 'package:just_audio_background/just_audio_background.dart';
import 'package:webview_flutter/webview_flutter.dart';

import 'app_theme_business_object.dart';
import 'streaming_audio_business_object.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await JustAudioBackground.init(
    androidNotificationChannelId: 'com.kryzgoflutter.audio.channel',
    androidNotificationChannelName: 'KRYZ Audio Playback',
    androidNotificationOngoing: true,
  );

  runApp(const MyApp());
}

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

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final StreamingAudioBusinessObject _audio = StreamingAudioBusinessObject();

  @override
  void dispose() {
    _audio.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Split Screen Player',
      theme: AppThemeBusinessObject.lightTheme(),
      darkTheme: AppThemeBusinessObject.darkTheme(),
      themeMode: ThemeMode.system,
      home: MainPage(audio: _audio),
      debugShowCheckedModeBanner: false,
    );
  }
}

class MainPage extends StatefulWidget {
  const MainPage({super.key, required this.audio});

  final StreamingAudioBusinessObject audio;

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

class _MainPageState extends State<MainPage> {
  StreamingAudioBusinessObject get _audio => widget.audio;
  late final WebViewController _webViewController;

  String _playbackStatusLabel() {
    switch (_audio.playbackStatus) {
      case StreamingPlaybackStatus.stopped:
        return 'Stopped';
      case StreamingPlaybackStatus.buffering:
        return 'Buffering...';
      case StreamingPlaybackStatus.playing:
        return 'Playing';
    }
  }

  @override
  void initState() {
    super.initState();
    _webViewController = WebViewController()
      ..setJavaScriptMode(JavaScriptMode.unrestricted)
      ..loadRequest(Uri.parse('https://kryzradio.org'));
    _audio.addListener(_handleAudioStateChanged);
  }

  void _handleAudioStateChanged() {
    if (!mounted) {
      return;
    }

    setState(() {
      // Rebuild when playback state changes from the player.
    });
  }

  Future<void> _play() async {
    await _audio.play();
  }

  Future<void> _stop() async {
    await _audio.stop();
  }

  @override
  void dispose() {
    _audio.removeListener(_handleAudioStateChanged);
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final themeColors = AppThemeBusinessObject.colorsFor(context);

    return Scaffold(
      body: SafeArea(
        child: Column(
          children: [
            Expanded(
              flex: 9,
              child: Padding(
                padding: const EdgeInsets.all(12),
                child: Container(
                  width: double.infinity,
                  decoration: BoxDecoration(
                    border: Border.all(
                      color: themeColors.webViewBorder,
                      width: 2,
                    ),
                    borderRadius: BorderRadius.circular(8),
                    color: themeColors.webViewBackground,
                  ),
                  child: ClipRRect(
                    borderRadius: BorderRadius.circular(6),
                    child: Column(
                      children: [
                        Container(
                          width: double.infinity,
                          padding: const EdgeInsets.symmetric(
                            horizontal: 12,
                            vertical: 8,
                          ),
                          decoration: BoxDecoration(
                            border: Border(
                              bottom: BorderSide(
                                color: themeColors.webViewBorder,
                              ),
                            ),
                          ),
                          child: Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            mainAxisSize: MainAxisSize.min,
                            children: [
                              Text(
                                'Station Information',
                                style: Theme.of(context).textTheme.labelMedium
                                    ?.copyWith(
                                      color: themeColors.statusText,
                                      fontWeight: FontWeight.w700,
                                    ),
                              ),
                              const SizedBox(height: 2),
                              Text(
                                'https://kryzradio.org',
                                style: Theme.of(context).textTheme.labelMedium
                                    ?.copyWith(
                                      color: Colors.blue,
                                      decoration: TextDecoration.underline,
                                      decorationColor: Colors.blue,
                                    ),
                              ),
                            ],
                          ),
                        ),
                        Expanded(
                          child: WebViewWidget(controller: _webViewController),
                        ),
                      ],
                    ),
                  ),
                ),
              ),
            ),
            Expanded(
              flex: 1,
              child: Padding(
                padding: const EdgeInsets.fromLTRB(12, 0, 12, 12),
                child: Container(
                  width: double.infinity,
                  padding: const EdgeInsets.symmetric(horizontal: 16),
                  decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(20),
                    gradient: LinearGradient(
                      begin: Alignment.topLeft,
                      end: Alignment.bottomRight,
                      colors: [
                        themeColors.controlsGradientStart,
                        themeColors.controlsGradientEnd,
                      ],
                    ),
                    boxShadow: [
                      BoxShadow(
                        color: themeColors.controlsShadow,
                        blurRadius: 14,
                        offset: Offset(0, 6),
                      ),
                    ],
                  ),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: [
                      ElevatedButton(
                        onPressed: _audio.isStopped ? _play : null,
                        child: const Text('▶️'),
                      ),
                      const SizedBox(width: 12),
                      ElevatedButton(
                        onPressed: _audio.isStopped ? null : _stop,
                        child: const Text('⏹️'),
                      ),
                      const SizedBox(width: 16),
                      Text(
                        _playbackStatusLabel(),
                        style: TextStyle(color: themeColors.statusText),
                      ),
                    ],
                  ),
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }
}