import 'package:flutter/material.dart';
import 'package:flutter/foundation.dart';
import 'package:shared_preferences/shared_preferences.dart';

class SettingsProvider with ChangeNotifier {
  // Use 10.0.2.2 for Android emulator to access host's localhost
  static String get _defaultUrl =>
      (defaultTargetPlatform == TargetPlatform.android && !kIsWeb)
      ? "http://10.0.2.2:8080"
      : "http://localhost:8080";

  String _baseUrl = _defaultUrl;
  Color _themeColor = Colors.blue;
  ThemeMode _themeMode = ThemeMode.system;
  bool _livePreviewThumbnailsEnabled = false;
  Locale? _locale;

  String get baseUrl => _baseUrl;
  Color get themeColor => _themeColor;
  ThemeMode get themeMode => _themeMode;
  bool get livePreviewThumbnailsEnabled => _livePreviewThumbnailsEnabled;
  Locale? get locale => _locale;

  SettingsProvider() {
    _loadSettings();
  }

  void _loadSettings() async {
    final prefs = await SharedPreferences.getInstance();
    _baseUrl = prefs.getString('baseUrl') ?? _baseUrl;
    final colorValue = prefs.getInt('themeColor');
    if (colorValue != null) {
      _themeColor = Color(colorValue);
    }
    final savedThemeMode = prefs.getString('themeMode');
    if (savedThemeMode != null) {
      _themeMode = _themeModeFromString(savedThemeMode);
    }
    _livePreviewThumbnailsEnabled =
        prefs.getBool('livePreviewThumbnailsEnabled') ?? false;
    
    final languageCode = prefs.getString('languageCode');
    final scriptCode = prefs.getString('scriptCode');
    final countryCode = prefs.getString('countryCode');
    if (languageCode != null) {
      _locale = Locale.fromSubtags(
        languageCode: languageCode,
        scriptCode: scriptCode,
        countryCode: countryCode,
      );
    }
    
    notifyListeners();
  }

  void setLocale(Locale? newLocale) async {
    _locale = newLocale;
    final prefs = await SharedPreferences.getInstance();
    if (newLocale == null) {
      await prefs.remove('languageCode');
      await prefs.remove('scriptCode');
      await prefs.remove('countryCode');
    } else {
      await prefs.setString('languageCode', newLocale.languageCode);
      if (newLocale.scriptCode != null) {
        await prefs.setString('scriptCode', newLocale.scriptCode!);
      } else {
        await prefs.remove('scriptCode');
      }
      if (newLocale.countryCode != null) {
        await prefs.setString('countryCode', newLocale.countryCode!);
      } else {
        await prefs.remove('countryCode');
      }
    }
    notifyListeners();
  }

  void setBaseUrl(String url) async {
    _baseUrl = url;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString('baseUrl', url);
    notifyListeners();
  }

  void setThemeColor(Color color) async {
    _themeColor = color;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setInt('themeColor', color.toARGB32());
    notifyListeners();
  }

  void setThemeMode(ThemeMode mode) async {
    _themeMode = mode;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setString('themeMode', mode.name);
    notifyListeners();
  }

  void setLivePreviewThumbnailsEnabled(bool enabled) async {
    _livePreviewThumbnailsEnabled = enabled;
    final prefs = await SharedPreferences.getInstance();
    await prefs.setBool('livePreviewThumbnailsEnabled', enabled);
    notifyListeners();
  }

  // Also provide the RTMP URL based on the same hostname
  String get rtmpUrl {
    final uri = Uri.parse(_baseUrl);
    return "rtmp://${uri.host}:1935/live";
  }

  String playbackUrl(String roomId, {String? quality}) {
    final uri = Uri.parse(_baseUrl);
    final normalizedQuality = quality?.trim().toLowerCase();

    if (kIsWeb) {
      return uri
          .replace(
            path: '/live/$roomId',
            queryParameters:
                normalizedQuality == null || normalizedQuality.isEmpty
                ? null
                : {'quality': normalizedQuality},
          )
          .toString();
    }

    if (normalizedQuality == null || normalizedQuality.isEmpty) {
      return "$rtmpUrl/$roomId";
    }
    return "$rtmpUrl/$roomId/$normalizedQuality";
  }

  String thumbnailUrl(String roomId, {String? cacheBuster}) {
    final uri = Uri.parse(_baseUrl);
    return uri
        .replace(
          path: '/api/rooms/$roomId/thumbnail',
          queryParameters: cacheBuster == null ? null : {'t': cacheBuster},
        )
        .toString();
  }

  ThemeMode _themeModeFromString(String value) {
    switch (value) {
      case 'light':
        return ThemeMode.light;
      case 'dark':
        return ThemeMode.dark;
      default:
        return ThemeMode.system;
    }
  }
}