import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:url_launcher/url_launcher.dart';
import 'bridge/location_bridge.dart';
import 'preferences.dart';

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

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

class _SettingsScreenState extends State<SettingsScreen> {
  late TextEditingController _serverUrlController;
  late TextEditingController _deviceIdController;
  late TextEditingController _distanceFilterController;
  late TextEditingController _intervalController;
  late TextEditingController _heartbeatController;
  late int _accuracy;
  late bool _offlineBuffer;
  late   bool _stopDetection;
  int _tapCount = 0;
  DateTime? _lastTapTime;

  Future<void> _handleAppBarTap() async {
    const tripleTapInterval = Duration(milliseconds: 500);
    final now = DateTime.now();

    if (_lastTapTime != null &&
        now.difference(_lastTapTime!) > tripleTapInterval) {
      _tapCount = 0;
    }

    _tapCount++;
    _lastTapTime = now;

    if (_tapCount == 3) {
      _tapCount = 0;
      final uri = Uri.parse('https://fiatcode.dev');
      if (await canLaunchUrl(uri)) {
        await launchUrl(uri, mode: LaunchMode.externalApplication);
      }
    }
  }

  @override
  void initState() {
    super.initState();
    SystemChrome.setSystemUIOverlayStyle(
      const SystemUiOverlayStyle(
        statusBarColor: Color(0xFF0d0d0d),
        statusBarIconBrightness: Brightness.light,
      ),
    );
    _serverUrlController = TextEditingController(text: Preferences.serverUrl);
    _deviceIdController = TextEditingController(text: Preferences.deviceId);
    _distanceFilterController = TextEditingController(
      text: Preferences.distanceFilter.toString(),
    );
    _intervalController = TextEditingController(
      text: Preferences.interval.toString(),
    );
    _heartbeatController = TextEditingController(
      text: Preferences.heartbeat.toString(),
    );
    _accuracy = Preferences.accuracy;
    _offlineBuffer = Preferences.offlineBuffer;
    _stopDetection = Preferences.stopDetection;
  }

  @override
  void dispose() {
    _serverUrlController.dispose();
    _deviceIdController.dispose();
    _distanceFilterController.dispose();
    _intervalController.dispose();
    _heartbeatController.dispose();
    super.dispose();
  }

  Future<void> _saveSettings() async {
    final distanceFilter = int.tryParse(_distanceFilterController.text) ?? 75;
    final interval = int.tryParse(_intervalController.text) ?? 300;
    final heartbeat = int.tryParse(_heartbeatController.text) ?? 60;

    await Preferences.setServerUrl(_serverUrlController.text);
    await Preferences.setDeviceId(_deviceIdController.text);
    await Preferences.setAccuracy(_accuracy);
    await Preferences.setDistanceFilter(distanceFilter);
    await Preferences.setInterval(interval);
    await Preferences.setHeartbeat(heartbeat);
    await Preferences.setOfflineBuffer(_offlineBuffer);
    await Preferences.setStopDetection(_stopDetection);

    await LocationBridge.updateConfig({
      'serverUrl': _serverUrlController.text,
      'deviceId': _deviceIdController.text,
      'accuracy': _accuracy,
      'distanceFilter': distanceFilter,
      'interval': interval,
      'heartbeat': heartbeat,
      'offlineBuffer': _offlineBuffer,
      'stopDetection': _stopDetection,
    });

    if (mounted) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Row(
            children: const [
              Icon(Icons.check_circle, color: Color(0xFF00e676), size: 18),
              SizedBox(width: 10),
              Text(
                'Settings saved',
                style: TextStyle(fontFamily: 'monospace', letterSpacing: 1),
              ),
            ],
          ),
          backgroundColor: const Color(0xFF1a1a1a),
          behavior: SnackBarBehavior.floating,
          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(4)),
        ),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: const Color(0xFF0d0d0d),
      appBar: AppBar(
        backgroundColor: const Color(0xFF161616),
        elevation: 0,
        leading: IconButton(
          icon: const Icon(
            Icons.arrow_back,
            color: Color(0xFF9e9e9e),
            size: 20,
          ),
          onPressed: () => Navigator.pop(context),
        ),
        title: GestureDetector(
          onTap: _handleAppBarTap,
          child: const Text(
            'SETTINGS',
            style: TextStyle(
              fontFamily: 'monospace',
              fontSize: 14,
              fontWeight: FontWeight.w700,
              letterSpacing: 2,
              color: Color(0xFFe0e0e0),
            ),
          ),
        ),
        bottom: PreferredSize(
          preferredSize: const Size.fromHeight(1),
          child: Container(height: 1, color: const Color(0xFF2a2a2a)),
        ),
      ),
      body: ListView(
        padding: const EdgeInsets.all(20),
        children: [
          _buildSectionHeader('SERVER'),
          const SizedBox(height: 12),
          _buildTextField('Server URL', _serverUrlController),
          const SizedBox(height: 12),
          _buildTextField('Device ID', _deviceIdController),
          const SizedBox(height: 24),
          _buildSectionHeader('LOCATION'),
          const SizedBox(height: 12),
          _buildAccuracyDropdown(),
          const SizedBox(height: 12),
          _buildNumberField('Distance Filter (m)', _distanceFilterController),
          const SizedBox(height: 12),
          _buildNumberField('Update Interval (s)', _intervalController),
          const SizedBox(height: 12),
          _buildNumberField('Heartbeat (s)', _heartbeatController),
          const SizedBox(height: 24),
          _buildSectionHeader('ADVANCED'),
          const SizedBox(height: 8),
          _buildSwitch(
            'Offline Buffering',
            'Queue locations when network unavailable',
            _offlineBuffer,
            (v) => setState(() => _offlineBuffer = v),
          ),
          const SizedBox(height: 4),
          _buildSwitch(
            'Stop Detection',
            'Auto-stop tracking when stationary',
            _stopDetection,
            (v) => setState(() => _stopDetection = v),
          ),
          const SizedBox(height: 32),
          _buildSaveButton(),
          const SizedBox(height: 20),
        ],
      ),
    );
  }

  Widget _buildSectionHeader(String title) {
    return Row(
      children: [
        Container(
          width: 3,
          height: 14,
          decoration: BoxDecoration(
            color: const Color(0xFF00bcd4),
            borderRadius: BorderRadius.circular(1),
          ),
        ),
        const SizedBox(width: 8),
        Text(
          title,
          style: const TextStyle(
            fontFamily: 'monospace',
            fontSize: 11,
            fontWeight: FontWeight.w700,
            letterSpacing: 2,
            color: Color(0xFF00bcd4),
          ),
        ),
      ],
    );
  }

  Widget _buildTextField(String label, TextEditingController controller) {
    return Container(
      decoration: BoxDecoration(
        color: const Color(0xFF161616),
        borderRadius: BorderRadius.circular(4),
        border: Border.all(color: const Color(0xFF2a2a2a), width: 1),
      ),
      child: TextField(
        controller: controller,
        style: const TextStyle(
          fontFamily: 'monospace',
          fontSize: 13,
          color: Color(0xFFe0e0e0),
        ),
        decoration: InputDecoration(
          labelText: label,
          labelStyle: const TextStyle(
            fontFamily: 'monospace',
            fontSize: 11,
            letterSpacing: 1,
            color: Color(0xFF616161),
          ),
          border: InputBorder.none,
          contentPadding: const EdgeInsets.symmetric(
            horizontal: 14,
            vertical: 14,
          ),
        ),
      ),
    );
  }

  Widget _buildAccuracyDropdown() {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 14),
      decoration: BoxDecoration(
        color: const Color(0xFF161616),
        borderRadius: BorderRadius.circular(4),
        border: Border.all(color: const Color(0xFF2a2a2a), width: 1),
      ),
      child: DropdownButtonFormField<int>(
        initialValue: _accuracy,
        dropdownColor: const Color(0xFF1a1a1a),
        style: const TextStyle(
          fontFamily: 'monospace',
          fontSize: 13,
          color: Color(0xFFe0e0e0),
        ),
        decoration: const InputDecoration(
          labelText: 'Accuracy',
          labelStyle: TextStyle(
            fontFamily: 'monospace',
            fontSize: 11,
            letterSpacing: 1,
            color: Color(0xFF616161),
          ),
          border: InputBorder.none,
        ),
        items: const [
          DropdownMenuItem(
            value: 0,
            child: Text('High', style: TextStyle(fontFamily: 'monospace')),
          ),
          DropdownMenuItem(
            value: 1,
            child: Text(
              'High Accuracy',
              style: TextStyle(fontFamily: 'monospace'),
            ),
          ),
          DropdownMenuItem(
            value: 2,
            child: Text('Balanced', style: TextStyle(fontFamily: 'monospace')),
          ),
          DropdownMenuItem(
            value: 3,
            child: Text('Low', style: TextStyle(fontFamily: 'monospace')),
          ),
        ],
        onChanged: (v) => setState(() => _accuracy = v!),
      ),
    );
  }

  Widget _buildNumberField(String label, TextEditingController controller) {
    return Container(
      decoration: BoxDecoration(
        color: const Color(0xFF161616),
        borderRadius: BorderRadius.circular(4),
        border: Border.all(color: const Color(0xFF2a2a2a), width: 1),
      ),
      child: TextField(
        controller: controller,
        keyboardType: TextInputType.number,
        style: const TextStyle(
          fontFamily: 'monospace',
          fontSize: 13,
          color: Color(0xFFe0e0e0),
        ),
        decoration: InputDecoration(
          labelText: label,
          labelStyle: const TextStyle(
            fontFamily: 'monospace',
            fontSize: 11,
            letterSpacing: 1,
            color: Color(0xFF616161),
          ),
          border: InputBorder.none,
          contentPadding: const EdgeInsets.symmetric(
            horizontal: 14,
            vertical: 14,
          ),
        ),
      ),
    );
  }

  Widget _buildSwitch(
    String title,
    String subtitle,
    bool value,
    ValueChanged<bool> onChanged,
  ) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 12),
      decoration: BoxDecoration(
        color: const Color(0xFF161616),
        borderRadius: BorderRadius.circular(4),
        border: Border.all(color: const Color(0xFF2a2a2a), width: 1),
      ),
      child: Row(
        children: [
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  title,
                  style: const TextStyle(
                    fontFamily: 'monospace',
                    fontSize: 13,
                    fontWeight: FontWeight.w600,
                    color: Color(0xFFe0e0e0),
                  ),
                ),
                const SizedBox(height: 2),
                Text(
                  subtitle,
                  style: const TextStyle(
                    fontFamily: 'monospace',
                    fontSize: 10,
                    color: Color(0xFF616161),
                  ),
                ),
              ],
            ),
          ),
          Switch(
            value: value,
            onChanged: onChanged,
            activeThumbColor: const Color(0xFF00e676),
            activeTrackColor: const Color(0xFF00e676).withValues(alpha: 0.3),
          ),
        ],
      ),
    );
  }

  Widget _buildSaveButton() {
    return Material(
      color: const Color(0xFF00bcd4).withValues(alpha: 0.1),
      borderRadius: BorderRadius.circular(4),
      child: InkWell(
        onTap: _saveSettings,
        borderRadius: BorderRadius.circular(4),
        child: Container(
          width: double.infinity,
          padding: const EdgeInsets.symmetric(vertical: 16),
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(4),
            border: Border.all(
              color: const Color(0xFF00bcd4).withValues(alpha: 0.4),
              width: 1,
            ),
          ),
          child: const Center(
            child: Text(
              'SAVE SETTINGS',
              style: TextStyle(
                fontFamily: 'monospace',
                fontSize: 13,
                fontWeight: FontWeight.w700,
                letterSpacing: 2,
                color: Color(0xFF00bcd4),
              ),
            ),
          ),
        ),
      ),
    );
  }
}