import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
import '../l10n/app_localizations.dart';
import '../utils/colors.dart';
import '../utils/haptic_utils.dart';
import '../utils/settings_manager.dart';
import '../utils/locale_manager.dart';
import 'components/animated_background.dart';
import 'google_play_games_widget.dart';

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

  @override
  State<SettingsScreen> createState() => _SettingsScreenState();
}

class _SettingsScreenState extends State<SettingsScreen> {
  bool _musicEnabled = true;
  bool _hapticsEnabled = true;
  double _bgmVolume = 0.4;
  double _sfxVolume = 0.6;

  @override
  void initState() {
    super.initState();
    _loadSettings();
  }

  Future<void> _loadSettings() async {
    setState(() {
      _musicEnabled = SettingsManager.isMusicEnabled;
      _hapticsEnabled = SettingsManager.isHapticsEnabled;
      _bgmVolume = SettingsManager.bgmVolume;
      _sfxVolume = SettingsManager.sfxVolume;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: ZenColors.appBackground,
      body: AnimatedBackground(
        child: SafeArea(
          child: Column(
            children: [
              // Header
              Padding(
                padding: const EdgeInsets.all(16.0),
                child: Row(
                  children: [
                    IconButton(
                      onPressed: () => Navigator.of(context).pop(),
                      icon: const Icon(
                        Icons.arrow_back,
                        color: ZenColors.primaryText,
                        size: 28,
                      ),
                      style: IconButton.styleFrom(
                        backgroundColor: ZenColors.black.withValues(alpha: 0.3),
                        shape: const CircleBorder(),
                      ),
                    ),
                    const SizedBox(width: 16),
                    Text(
                      AppLocalizations.of(context)!.settings,
                      style: TextStyle(
                        color: ZenColors.primaryText,
                        fontSize: 28,
                        fontWeight: FontWeight.bold,
                        letterSpacing: 1.0,
                      ),
                    ),
                  ],
                ),
              ),
              
              // Settings List
              Expanded(
                child: SingleChildScrollView(
                  padding: const EdgeInsets.symmetric(horizontal: 20.0),
                  child: Column(
                    children: [
                      const SizedBox(height: 20),
                      
                      // Audio Section
                      _buildSectionHeader(AppLocalizations.of(context)!.audio),
                      _buildSettingTile(
                        icon: Icons.music_note,
                        title: AppLocalizations.of(context)!.backgroundMusic,
                        subtitle: AppLocalizations.of(context)!.backgroundMusicDesc,
                        value: _musicEnabled,
                        onChanged: _toggleMusic,
                      ),
                      _buildVolumeSlider(
                        icon: Icons.volume_up,
                        title: AppLocalizations.of(context)!.musicVolume,
                        value: _bgmVolume,
                        onChanged: _setBgmVolume,
                      ),
                      
                      const SizedBox(height: 10),
                      
                      _buildVolumeSlider(
                        icon: Icons.volume_up,
                        title: AppLocalizations.of(context)!.soundEffectsVolume,
                        value: _sfxVolume,
                        onChanged: _setSfxVolume,
                      ),
                      
                      const SizedBox(height: 30),
                      
                      // Feedback Section
                      _buildSectionHeader(AppLocalizations.of(context)!.feedback),
                      _buildSettingTile(
                        icon: Icons.vibration,
                        title: AppLocalizations.of(context)!.hapticFeedback,
                        subtitle: AppLocalizations.of(context)!.hapticFeedbackDesc,
                        value: _hapticsEnabled,
                        onChanged: _toggleHaptics,
                      ),
                      
                      const SizedBox(height: 30),
                      
                      // Language Section
                      _buildSectionHeader(AppLocalizations.of(context)!.language),
                      _buildLanguageTile(),
                      
                      const SizedBox(height: 30),
                      
                      // Tutorial Section
                      _buildSectionHeader(AppLocalizations.of(context)!.help),
                      _buildActionTile(
                        icon: Icons.help_outline,
                        title: AppLocalizations.of(context)!.showTutorial,
                        subtitle: AppLocalizations.of(context)!.showTutorialDesc,
                        onTap: _showTutorial,
                      ),
                      
                      const SizedBox(height: 30),
                      
                      // Google Play Games Section
                      _buildSectionHeader(AppLocalizations.of(context)!.googlePlayGames),
                      const GooglePlayGamesWidget(),
                      
                      const SizedBox(height: 30),
                      
                      // Support Section
                      _buildSectionHeader(AppLocalizations.of(context)!.supportZenTap),
                      _buildDonationTile(),
                      
                      const SizedBox(height: 30),
                      
                      // About Section
                      Padding(
                        padding: const EdgeInsets.only(bottom: 20),
                        child: Column(
                          children: [
                            Text(
                              'ZenTap v1.0.2',
                              style: TextStyle(
                                color: ZenColors.mutedText,
                                fontSize: 14,
                              ),
                            ),
                            const SizedBox(height: 8),
                            Text(
                              AppLocalizations.of(context)!.stressReliefGame,
                              style: TextStyle(
                                color: ZenColors.mutedText,
                                fontSize: 12,
                                fontStyle: FontStyle.italic,
                              ),
                            ),
                          ],
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildSectionHeader(String title) {
    return Align(
      alignment: Alignment.centerLeft,
      child: Text(
        title,
        style: TextStyle(
          color: ZenColors.secondaryText,
          fontSize: 16,
          fontWeight: FontWeight.w600,
          letterSpacing: 0.5,
        ),
      ),
    );
  }

  Widget _buildSettingTile({
    required IconData icon,
    required String title,
    required String subtitle,
    required bool value,
    required ValueChanged<bool> onChanged,
  }) {
    return Container(
      margin: const EdgeInsets.only(top: 12),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: ZenColors.uiElements.withValues(alpha: 0.3),
        borderRadius: BorderRadius.circular(12),
        border: Border.all(
          color: ZenColors.uiElements.withValues(alpha: 0.2),
          width: 1,
        ),
      ),
      child: Row(
        children: [
          Icon(
            icon,
            color: ZenColors.primaryText,
            size: 24,
          ),
          const SizedBox(width: 16),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  title,
                  style: const TextStyle(
                    color: ZenColors.primaryText,
                    fontSize: 16,
                    fontWeight: FontWeight.w500,
                  ),
                ),
                const SizedBox(height: 2),
                Text(
                  subtitle,
                  style: TextStyle(
                    color: ZenColors.secondaryText,
                    fontSize: 13,
                  ),
                ),
              ],
            ),
          ),
          Switch(
            value: value,
            onChanged: onChanged,
            activeColor: ZenColors.buttonBackground,
            activeTrackColor: ZenColors.buttonBackground.withValues(alpha: 0.3),
            inactiveThumbColor: ZenColors.mutedText,
            inactiveTrackColor: ZenColors.mutedText.withValues(alpha: 0.2),
          ),
        ],
      ),
    );
  }

  Widget _buildActionTile({
    required IconData icon,
    required String title,
    required String subtitle,
    required VoidCallback onTap,
  }) {
    return Container(
      margin: const EdgeInsets.only(top: 12),
      child: Material(
        color: ZenColors.uiElements.withValues(alpha: 0.3),
        borderRadius: BorderRadius.circular(12),
        child: InkWell(
          onTap: onTap,
          borderRadius: BorderRadius.circular(12),
          child: Container(
            padding: const EdgeInsets.all(16),
            decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(12),
              border: Border.all(
                color: ZenColors.uiElements.withValues(alpha: 0.2),
                width: 1,
              ),
            ),
            child: Row(
              children: [
                Icon(
                  icon,
                  color: ZenColors.primaryText,
                  size: 24,
                ),
                const SizedBox(width: 16),
                Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        title,
                        style: const TextStyle(
                          color: ZenColors.primaryText,
                          fontSize: 16,
                          fontWeight: FontWeight.w500,
                        ),
                      ),
                      const SizedBox(height: 2),
                      Text(
                        subtitle,
                        style: TextStyle(
                          color: ZenColors.secondaryText,
                          fontSize: 13,
                        ),
                      ),
                    ],
                  ),
                ),
                Icon(
                  Icons.arrow_forward_ios,
                  color: ZenColors.mutedText,
                  size: 16,
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }

  Future<void> _toggleMusic(bool value) async {
    setState(() {
      _musicEnabled = value;
    });
    await SettingsManager.setMusicEnabled(value);
    
    if (_hapticsEnabled) {
      await HapticUtils.vibrate(duration: 50);
    }
  }

  Future<void> _setBgmVolume(double value) async {
    setState(() {
      _bgmVolume = value;
    });
    await SettingsManager.setBgmVolume(value);
    SettingsManager.applyBgmVolume();
  }

  Future<void> _setSfxVolume(double value) async {
    setState(() {
      _sfxVolume = value;
    });
    await SettingsManager.setSfxVolume(value);
  }

  Future<void> _toggleHaptics(bool value) async {
    setState(() {
      _hapticsEnabled = value;
    });
    await SettingsManager.setHapticsEnabled(value);
    
    // Give immediate feedback if enabling haptics
    if (value) {
      await HapticUtils.vibrate(duration: 100);
    }
  }

  void _showTutorial() {
    if (_hapticsEnabled) {
      HapticUtils.vibrate(duration: 50);
    }
    
    showDialog(
      context: context,
      builder: (context) => _buildTutorialDialog(),
    );
  }

  void _showDonationDialog() {
    if (_hapticsEnabled) {
      HapticUtils.vibrate(duration: 50);
    }
    
    showDialog(
      context: context,
      builder: (context) => _buildDonationDialog(),
    );
  }

  Future<void> _openDonationLink(String url) async {
    if (_hapticsEnabled) {
      HapticUtils.vibrate(duration: 30);
    }
    
    try {
      final Uri uri = Uri.parse(url);
      if (await canLaunchUrl(uri)) {
        await launchUrl(uri, mode: LaunchMode.externalApplication);
        Navigator.of(context).pop(); // Close dialog after opening link
      } else {
        // Show error if URL can't be launched
        if (mounted) {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(
              content: Text(AppLocalizations.of(context)!.couldNotOpenDonationLink),
              backgroundColor: ZenColors.mutedText,
              behavior: SnackBarBehavior.floating,
            ),
          );
        }
      }
    } catch (e) {
      // Show error on exception
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text(AppLocalizations.of(context)!.errorOpeningDonationLink),
            backgroundColor: ZenColors.mutedText,
            behavior: SnackBarBehavior.floating,
          ),
        );
      }
    }
  }

  Widget _buildTutorialDialog() {
    return AlertDialog(
      backgroundColor: ZenColors.uiElements,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(20),
      ),
      title: Text(
        AppLocalizations.of(context)!.howToUseZenTap,
        style: TextStyle(
          color: ZenColors.primaryText,
          fontSize: 22,
          fontWeight: FontWeight.bold,
        ),
      ),
      content: Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          _buildTutorialStep(
            icon: Icons.touch_app,
            text: AppLocalizations.of(context)!.tapToPopBubbles,
          ),
          const SizedBox(height: 16),
          _buildTutorialStep(
            icon: Icons.stars,
            text: AppLocalizations.of(context)!.earnRelaxationPoints,
          ),
          const SizedBox(height: 16),
          _buildTutorialStep(
            icon: Icons.self_improvement,
            text: AppLocalizations.of(context)!.chooseZenMode,
          ),
          const SizedBox(height: 16),
          _buildTutorialStep(
            icon: Icons.pause,
            text: AppLocalizations.of(context)!.tapPauseAnytime,
          ),
        ],
      ),
      actions: [
        ElevatedButton(
          onPressed: () => Navigator.of(context).pop(),
          style: ElevatedButton.styleFrom(
            backgroundColor: ZenColors.buttonBackground,
            foregroundColor: ZenColors.buttonText,
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(12),
            ),
          ),
          child: Text(AppLocalizations.of(context)!.gotIt),
        ),
      ],
    );
  }

  Widget _buildVolumeSlider({
    required IconData icon,
    required String title,
    required double value,
    required ValueChanged<double> onChanged,
  }) {
    return Container(
      margin: const EdgeInsets.only(top: 8),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: ZenColors.uiElements.withValues(alpha: 0.3),
        borderRadius: BorderRadius.circular(12),
        border: Border.all(
          color: ZenColors.uiElements.withValues(alpha: 0.2),
          width: 1,
        ),
      ),
      child: Row(
        children: [
          Icon(
            icon,
            color: ZenColors.primaryText,
            size: 24,
          ),
          const SizedBox(width: 16),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  title,
                  style: const TextStyle(
                    color: ZenColors.primaryText,
                    fontSize: 16,
                    fontWeight: FontWeight.w500,
                  ),
                ),
                const SizedBox(height: 8),
                Slider(
                  value: value,
                  onChanged: onChanged,
                  min: 0.0,
                  max: 1.0,
                  divisions: 10,
                  label: '${(value * 100).round()}%',
                  activeColor: ZenColors.buttonBackground,
                  inactiveColor: ZenColors.mutedText.withValues(alpha: 0.2),
                ),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildTutorialStep({
    required IconData icon,
    required String text,
  }) {
    return Row(
      children: [
        Icon(
          icon,
          color: ZenColors.buttonBackground,
          size: 20,
        ),
        const SizedBox(width: 12),
        Expanded(
          child: Text(
            text,
            style: TextStyle(
              color: ZenColors.secondaryText,
              fontSize: 14,
            ),
          ),
        ),
      ],
    );
  }

  Widget _buildDonationTile() {
    return _buildActionTile(
      icon: Icons.favorite,
      title: AppLocalizations.of(context)!.supportDevelopment,
      subtitle: AppLocalizations.of(context)!.supportDevelopmentDesc,
      onTap: _showDonationDialog,
    );
  }

  Widget _buildDonationDialog() {
    return AlertDialog(
      backgroundColor: ZenColors.uiElements,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(20),
      ),
      title: Row(
        children: [
          Icon(
            Icons.favorite,
            color: ZenColors.red,
            size: 24,
          ),
          const SizedBox(width: 12),
          Text(
            AppLocalizations.of(context)!.supportZenTapTitle,
            style: TextStyle(
              color: ZenColors.primaryText,
              fontSize: 22,
              fontWeight: FontWeight.bold,
            ),
          ),
        ],
      ),
      content: Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            AppLocalizations.of(context)!.supportMessage,
            style: TextStyle(
              color: ZenColors.secondaryText,
              fontSize: 14,
              height: 1.4,
            ),
          ),
          const SizedBox(height: 20),
          
          // Ko-fi Button
          _buildDonationButton(
            icon: Icons.coffee,
            title: AppLocalizations.of(context)!.buyMeACoffee,
            subtitle: AppLocalizations.of(context)!.kofiOneTime,
            color: const Color(0xFF13C3FF),
            onTap: () => _openDonationLink('https://ko-fi.com/fsociety_hu'),
          ),
          
          const SizedBox(height: 12),
          
          // PayPal Button
          _buildDonationButton(
            icon: Icons.payment,
            title: AppLocalizations.of(context)!.paypalDonation,
            subtitle: AppLocalizations.of(context)!.directDonation,
            color: const Color(0xFF0070BA),
            onTap: () => _openDonationLink('https://paypal.me/fsocietyhu'),
          ),
          
          const SizedBox(height: 12),
          
          // GitHub Sponsors Button
          _buildDonationButton(
            icon: Icons.code,
            title: AppLocalizations.of(context)!.githubSponsors,
            subtitle: AppLocalizations.of(context)!.monthlySupport,
            color: const Color(0xFFEA4AAA),
            onTap: () => _openDonationLink('https://github.com/sponsors/fszontagh'),
          ),
          
          const SizedBox(height: 16),
          
          Text(
            AppLocalizations.of(context)!.thankYouMessage,
            style: TextStyle(
              color: ZenColors.secondaryText,
              fontSize: 12,
              fontStyle: FontStyle.italic,
            ),
            textAlign: TextAlign.center,
          ),
        ],
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.of(context).pop(),
          child: Text(
            AppLocalizations.of(context)!.maybeLater,
            style: TextStyle(
              color: ZenColors.mutedText,
            ),
          ),
        ),
      ],
    );
  }

  Widget _buildDonationButton({
    required IconData icon,
    required String title,
    required String subtitle,
    required Color color,
    required VoidCallback onTap,
  }) {
    return Material(
      color: color.withValues(alpha: 0.1),
      borderRadius: BorderRadius.circular(12),
      child: InkWell(
        onTap: onTap,
        borderRadius: BorderRadius.circular(12),
        child: Container(
          padding: const EdgeInsets.all(12),
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(12),
            border: Border.all(
              color: color.withValues(alpha: 0.3),
              width: 1,
            ),
          ),
          child: Row(
            children: [
              Icon(
                icon,
                color: color,
                size: 20,
              ),
              const SizedBox(width: 12),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      title,
                      style: TextStyle(
                        color: ZenColors.primaryText,
                        fontSize: 14,
                        fontWeight: FontWeight.w500,
                      ),
                    ),
                    Text(
                      subtitle,
                      style: TextStyle(
                        color: ZenColors.secondaryText,
                        fontSize: 12,
                      ),
                    ),
                  ],
                ),
              ),
              Icon(
                Icons.open_in_new,
                color: color,
                size: 16,
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildLanguageTile() {
    final currentLocale = LocaleManager.currentLocale;
    final currentLanguageName = LocaleManager.getLocaleDisplayName(currentLocale);
    
    return Container(
      margin: const EdgeInsets.only(top: 12),
      child: Material(
        color: ZenColors.uiElements.withValues(alpha: 0.3),
        borderRadius: BorderRadius.circular(12),
        child: InkWell(
          onTap: _showLanguageDialog,
          borderRadius: BorderRadius.circular(12),
          child: Container(
            padding: const EdgeInsets.all(16),
            decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(12),
              border: Border.all(
                color: ZenColors.uiElements.withValues(alpha: 0.2),
                width: 1,
              ),
            ),
            child: Row(
              children: [
                const Icon(
                  Icons.language,
                  color: ZenColors.primaryText,
                  size: 24,
                ),
                const SizedBox(width: 16),
                Expanded(
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        AppLocalizations.of(context)!.language,
                        style: TextStyle(
                          color: ZenColors.primaryText,
                          fontSize: 16,
                          fontWeight: FontWeight.w500,
                        ),
                      ),
                      const SizedBox(height: 2),
                      Text(
                        currentLanguageName,
                        style: TextStyle(
                          color: ZenColors.secondaryText,
                          fontSize: 13,
                        ),
                      ),
                    ],
                  ),
                ),
                Icon(
                  Icons.arrow_forward_ios,
                  color: ZenColors.mutedText,
                  size: 16,
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }

  void _showLanguageDialog() {
    if (_hapticsEnabled) {
      HapticUtils.vibrate(duration: 50);
    }
    
    showDialog(
      context: context,
      builder: (context) => _buildLanguageDialog(),
    );
  }

  Widget _buildLanguageDialog() {
    final currentLocale = LocaleManager.currentLocale;
    
    return AlertDialog(
      backgroundColor: ZenColors.uiElements,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(20),
      ),
      title: Text(
        AppLocalizations.of(context)!.selectLanguage,
        style: TextStyle(
          color: ZenColors.primaryText,
          fontSize: 22,
          fontWeight: FontWeight.bold,
        ),
      ),
      content: Column(
        mainAxisSize: MainAxisSize.min,
        children: LocaleManager.supportedLocales.map((locale) {
          final isSelected = locale.languageCode == currentLocale.languageCode;
          final languageName = LocaleManager.getLocaleDisplayName(locale);
          
          return Container(
            margin: const EdgeInsets.only(bottom: 8),
            child: Material(
              color: isSelected
                ? ZenColors.buttonBackground.withValues(alpha: 0.1)
                : Colors.transparent,
              borderRadius: BorderRadius.circular(12),
              child: InkWell(
                onTap: () => _selectLanguage(locale),
                borderRadius: BorderRadius.circular(12),
                child: Container(
                  padding: const EdgeInsets.all(12),
                  decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(12),
                    border: Border.all(
                      color: isSelected
                        ? ZenColors.buttonBackground.withValues(alpha: 0.3)
                        : ZenColors.uiElements.withValues(alpha: 0.2),
                      width: 1,
                    ),
                  ),
                  child: Row(
                    children: [
                      Expanded(
                        child: Text(
                          languageName,
                          style: TextStyle(
                            color: isSelected ? ZenColors.buttonBackground : ZenColors.primaryText,
                            fontSize: 16,
                            fontWeight: isSelected ? FontWeight.w600 : FontWeight.normal,
                          ),
                        ),
                      ),
                      if (isSelected)
                        Icon(
                          Icons.check,
                          color: ZenColors.buttonBackground,
                          size: 20,
                        ),
                    ],
                  ),
                ),
              ),
            ),
          );
        }).toList(),
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.of(context).pop(),
          child: Text(
            AppLocalizations.of(context)!.cancel,
            style: TextStyle(
              color: ZenColors.mutedText,
            ),
          ),
        ),
      ],
    );
  }

  Future<void> _selectLanguage(Locale locale) async {
    if (_hapticsEnabled) {
      HapticUtils.vibrate(duration: 30);
    }
    
    await LocaleManager.setLocale(locale);
    if (mounted) {
      Navigator.of(context).pop(); // Close language dialog
      setState(() {}); // Refresh the settings screen to show new language
    }
  }
}