import 'package:flutter/material.dart';
import '../models/sensor_data_model.dart';
import '../services/realtime_database_service.dart';
import '../services/auth_service.dart';
import '../utils/app_colors.dart';
import '../widgets/sensor_card.dart';
import '../widgets/custom_button.dart';
import 'login_screen.dart';

class DashboardScreen extends StatefulWidget {
  const DashboardScreen({Key? key}) : super(key: key);

  @override
  State<DashboardScreen> createState() => _DashboardScreenState();
}

class _DashboardScreenState extends State<DashboardScreen> {
  final RealtimeDatabaseService _dbService = RealtimeDatabaseService();
  final AuthService _authService = AuthService();
  bool _isLoading = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Dashboard Deteksi Kebakaran'),
        backgroundColor: AppColors.primaryRed,
        foregroundColor: AppColors.textLight,
        elevation: 0,
        actions: [
          IconButton(
            icon: const Icon(Icons.refresh),
            onPressed: () {
              setState(() {});
            },
          ),
          PopupMenuButton<String>(
            onSelected: (value) {
              if (value == 'logout') {
                _handleLogout();
              }
            },
            itemBuilder:
                (BuildContext context) => [
                  PopupMenuItem<String>(
                    value: 'logout',
                    child: Row(
                      children: [
                        Icon(Icons.logout, color: AppColors.textError),
                        const SizedBox(width: 8),
                        Text('Logout'),
                      ],
                    ),
                  ),
                ],
          ),
        ],
      ),
      body: StreamBuilder<SensorData>(
        stream: _dbService.sensorDataStream,
        builder: (context, snapshot) {
          if (snapshot.connectionState == ConnectionState.waiting) {
            return const Center(
              child: CircularProgressIndicator(
                valueColor: AlwaysStoppedAnimation<Color>(AppColors.primaryRed),
              ),
            );
          }

          if (snapshot.hasError) {
            return Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Icon(
                    Icons.error_outline,
                    size: 64,
                    color: AppColors.textError,
                  ),
                  const SizedBox(height: 16),
                  Text(
                    'Gagal memuat data sensor',
                    style: TextStyle(
                      fontSize: 18,
                      fontWeight: FontWeight.w600,
                      color: AppColors.textError,
                    ),
                  ),
                  const SizedBox(height: 8),
                  Text(
                    'Periksa koneksi internet Anda',
                    style: TextStyle(
                      fontSize: 14,
                      color: AppColors.textSecondary,
                    ),
                  ),
                  const SizedBox(height: 16),
                  ElevatedButton(
                    onPressed: () {
                      setState(() {});
                    },
                    child: const Text('Coba Lagi'),
                  ),
                ],
              ),
            );
          }

          final sensorData = snapshot.data!;
          return RefreshIndicator(
            onRefresh: () async {
              setState(() {});
            },
            child: SingleChildScrollView(
              physics: const AlwaysScrollableScrollPhysics(),
              padding: const EdgeInsets.all(16),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  // Status Overview
                  _buildStatusOverview(sensorData),

                  const SizedBox(height: 24),

                  // Sensor Data Section
                  _buildSectionTitle('Data Sensor'),
                  _buildSensorCards(sensorData),

                  const SizedBox(height: 24),

                  // Control Section
                  // _buildSectionTitle('Kontrol Sistem'),
                  // _buildControlCards(sensorData),
                  const SizedBox(height: 24),

                  // Emergency Actions
                  // _buildEmergencyActions(),
                ],
              ),
            ),
          );
        },
      ),
    );
  }

  Widget _buildStatusOverview(SensorData sensorData) {
    Color statusColor;
    String statusText;
    IconData statusIcon;

    if (sensorData.isFireDetected) {
      statusColor = AppColors.textError;
      statusText = 'BAHAYA - API TERDETEKSI';
      statusIcon = Icons.local_fire_department;
    } else if (sensorData.isWarning) {
      statusColor = AppColors.primaryOrange;
      statusText = 'WASPADA - KONDISI ABNORMAL';
      statusIcon = Icons.warning;
    } else {
      statusColor = AppColors.accentGreen;
      statusText = 'AMAN - KONDISI NORMAL';
      statusIcon = Icons.check_circle;
    }

    return Container(
      width: double.infinity,
      padding: const EdgeInsets.all(20),
      decoration: BoxDecoration(
        gradient: LinearGradient(
          begin: Alignment.topLeft,
          end: Alignment.bottomRight,
          colors: [statusColor, statusColor.withOpacity(0.8)],
        ),
        borderRadius: BorderRadius.circular(16),
        boxShadow: [
          BoxShadow(
            color: statusColor.withOpacity(0.3),
            blurRadius: 20,
            offset: const Offset(0, 10),
          ),
        ],
      ),
      child: Column(
        children: [
          Icon(statusIcon, size: 48, color: AppColors.textLight),
          const SizedBox(height: 12),
          Text(
            statusText,
            style: const TextStyle(
              fontSize: 18,
              fontWeight: FontWeight.bold,
              color: AppColors.textLight,
            ),
            textAlign: TextAlign.center,
          ),
          const SizedBox(height: 8),
          Text(
            'Terakhir Update: ${DateTime.now().toString().substring(0, 19)}',
            style: TextStyle(
              fontSize: 12,
              color: AppColors.textLight.withOpacity(0.8),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildSectionTitle(String title) {
    return Padding(
      padding: const EdgeInsets.only(bottom: 16),
      child: Text(
        title,
        style: const TextStyle(
          fontSize: 20,
          fontWeight: FontWeight.bold,
          color: AppColors.textPrimary,
        ),
      ),
    );
  }

  Widget _buildSensorCards(SensorData sensorData) {
    return Column(
      children: [
        SensorCard(
          title: 'Suhu',
          value: sensorData.suhu.toStringAsFixed(1),
          unit: '°C',
          icon: Icons.thermostat,
          statusColor:
              sensorData.suhu > 35
                  ? AppColors.textError
                  : sensorData.suhu > 25
                  ? AppColors.accentGreen
                  : AppColors.primaryBlue,
          status: sensorData.statusSuhu,
        ),
        SensorCard(
          title: 'Kelembapan',
          value: sensorData.kelembapan.toString(),
          unit: '%',
          icon: Icons.water_drop,
          statusColor:
              sensorData.kelembapan > 70
                  ? AppColors.primaryBlue
                  : sensorData.kelembapan > 40
                  ? AppColors.accentGreen
                  : AppColors.primaryOrange,
          status: sensorData.statusKelembapan,
        ),
        SensorCard(
          title: 'Gas',
          value: sensorData.gasValue.toString(),
          unit: 'ppm',
          icon: Icons.air,
          statusColor:
              sensorData.gasValue > 300
                  ? AppColors.textError
                  : sensorData.gasValue > 150
                  ? AppColors.primaryOrange
                  : AppColors.accentGreen,
          status: sensorData.statusGas,
        ),
        SensorCard(
          title: 'Deteksi Api',
          value: sensorData.apiTerdeteksi ? 'TERDETEKSI' : 'AMAN',
          unit: '',
          icon: Icons.local_fire_department,
          statusColor:
              sensorData.apiTerdeteksi
                  ? AppColors.textError
                  : AppColors.accentGreen,
          status: sensorData.statusApi,
        ),
      ],
    );
  }

  Widget _buildControlCards(SensorData sensorData) {
    return Column(
      children: [
        ControlCard(
          title: 'Buzzer',
          description: 'Alarm suara peringatan',
          icon: Icons.volume_up,
          isActive: sensorData.buzzerActive,
          activeColor: AppColors.primaryOrange,
          onToggle: () => _toggleControl('buzzer', !sensorData.buzzerActive),
        ),
        ControlCard(
          title: 'Exhaust Fan',
          description: 'Kipas pembuangan asap',
          icon: Icons.air,
          isActive: sensorData.exhaustActive,
          activeColor: AppColors.primaryBlue,
          onToggle: () => _toggleControl('exhaust', !sensorData.exhaustActive),
        ),
        ControlCard(
          title: 'Water Pump',
          description: 'Pompa air pemadam',
          icon: Icons.water,
          isActive: sensorData.pumpActive,
          activeColor: AppColors.accentGreen,
          onToggle: () => _toggleControl('pump', !sensorData.pumpActive),
        ),
      ],
    );
  }

  Widget _buildEmergencyActions() {
    return Column(
      children: [
        const SizedBox(height: 16),
        // Mode Darurat Button
        CustomButton(
          text: 'Mode Darurat',
          onPressed: _activateEmergencyMode,
          backgroundColor: AppColors.textError,
          icon: Icons.emergency,
          isLoading: _isLoading,
          width: double.infinity,
        ),
        const SizedBox(height: 8),
        // Reset Semua Button
        CustomButton(
          text: 'Reset Semua',
          onPressed: _resetAllControls,
          backgroundColor: AppColors.secondaryGray,
          icon: Icons.refresh,
          isLoading: _isLoading,
          width: double.infinity,
        ),
      ],
    );
  }

  Future<void> _toggleControl(String controlType, bool value) async {
    setState(() {
      _isLoading = true;
    });

    try {
      switch (controlType) {
        case 'buzzer':
          await _dbService.updateControl(buzzerActive: value);
          break;
        case 'exhaust':
          await _dbService.updateControl(exhaustActive: value);
          break;
        case 'pump':
          await _dbService.updateControl(pumpActive: value);
          break;
      }

      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text('Kontrol $controlType berhasil diupdate'),
          backgroundColor: AppColors.accentGreen,
        ),
      );
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(e.toString()),
          backgroundColor: AppColors.textError,
        ),
      );
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

  Future<void> _activateEmergencyMode() async {
    setState(() {
      _isLoading = true;
    });

    try {
      await _dbService.activateEmergencyMode();
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Mode darurat diaktifkan!'),
          backgroundColor: AppColors.textError,
        ),
      );
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(e.toString()),
          backgroundColor: AppColors.textError,
        ),
      );
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

  Future<void> _resetAllControls() async {
    setState(() {
      _isLoading = true;
    });

    try {
      await _dbService.resetAllControls();
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(
          content: Text('Semua kontrol berhasil direset'),
          backgroundColor: AppColors.accentGreen,
        ),
      );
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(e.toString()),
          backgroundColor: AppColors.textError,
        ),
      );
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

  Future<void> _handleLogout() async {
    try {
      await _authService.signOut();
      Navigator.pushReplacement(
        context,
        MaterialPageRoute(builder: (context) => const LoginScreen()),
      );
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(e.toString()),
          backgroundColor: AppColors.textError,
        ),
      );
    }
  }
}