import 'package:flutter/material.dart';
import '../services/notification_service.dart';
import '../services/user_service.dart';
import 'home_screen.dart';

class NotificationPermissionScreen extends StatefulWidget {
  @override
  _NotificationPermissionScreenState createState() =>
      _NotificationPermissionScreenState();
}

class _NotificationPermissionScreenState
    extends State<NotificationPermissionScreen> {
  bool _isLoading = false;

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

    try {
      final notificationService = NotificationService();
      await notificationService.requestPermissionAndSetup();

      final fcmToken = await notificationService.getToken();

      if (fcmToken != null) {
        final result = await UserService.updateFCMToken(fcmToken);

        if (result['success'] == true) {
          Navigator.of(context).pushReplacement(
            MaterialPageRoute(builder: (context) => HomeScreen()),
          );
        } else {
          _showErrorAndContinue(
            result['message'] ?? 'Failed to update notification settings',
          );
        }
      } else {
        _showErrorAndContinue('Failed to get notification token');
      }
    } catch (e) {
      _showErrorAndContinue('Error setting up notifications: $e');
    }

    setState(() {
      _isLoading = false;
    });
  }

  void _showErrorAndContinue(String message) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: Text('Notification Setup'),
        content: Text(
          '$message\n\nYou can enable notifications later in settings.',
        ),
        actions: [
          TextButton(
            onPressed: () {
              Navigator.of(context).pop();
              Navigator.of(context).pushReplacement(
                MaterialPageRoute(builder: (context) => HomeScreen()),
              );
            },
            child: Text('Continue', style: TextStyle(color: Color(0xFF6A4C93))),
          ),
        ],
      ),
    );
  }

  void _skipNotifications() {
    Navigator.of(
      context,
    ).pushReplacement(MaterialPageRoute(builder: (context) => HomeScreen()));
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        decoration: BoxDecoration(
          gradient: LinearGradient(
            begin: Alignment.topCenter,
            end: Alignment.bottomCenter,
            colors: [Color(0xFF32B0A5), Color(0xFF4600B9)],
            stops: [0.0, 0.5],
          ),
        ),
        child: SafeArea(
          child: Padding(
            padding: EdgeInsets.all(24),
            child: Column(
              children: [
                Expanded(
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    children: [
                      Container(
                        width: 200,
                        height: 200,
                        decoration: BoxDecoration(
                          color: Colors.white.withOpacity(0.2),
                          shape: BoxShape.circle,
                        ),
                        child: Icon(
                          Icons.rocket_launch,
                          size: 100,
                          color: Colors.white,
                        ),
                      ),

                      SizedBox(height: 40),

                      Text(
                        'All Set!',
                        style: TextStyle(
                          fontSize: 32,
                          fontWeight: FontWeight.bold,
                          color: Colors.white,
                        ),
                      ),

                      SizedBox(height: 16),

                      Text(
                        'But one last thing...',
                        style: TextStyle(
                          fontSize: 18,
                          color: Colors.white.withOpacity(0.9),
                        ),
                      ),

                      SizedBox(height: 40),

                      Container(
                        padding: EdgeInsets.all(24),
                        decoration: BoxDecoration(
                          color: Colors.white.withOpacity(0.1),
                          borderRadius: BorderRadius.circular(16),
                          border: Border.all(
                            color: Colors.white.withOpacity(0.3),
                          ),
                        ),
                        child: Column(
                          children: [
                            Icon(
                              Icons.notifications_active,
                              size: 40,
                              color: Colors.white,
                            ),
                            SizedBox(height: 16),
                            Text(
                              'Stay Connected',
                              style: TextStyle(
                                fontSize: 20,
                                fontWeight: FontWeight.w600,
                                color: Colors.white,
                              ),
                            ),
                            SizedBox(height: 8),
                            Text(
                              'We will only send you updates on your own invitations or posts. You can always change your notification settings later.',
                              textAlign: TextAlign.center,
                              style: TextStyle(
                                fontSize: 16,
                                color: Colors.white.withOpacity(0.8),
                                height: 1.4,
                              ),
                            ),
                          ],
                        ),
                      ),
                    ],
                  ),
                ),

                Column(
                  children: [
                    Container(
                      width: double.infinity,
                      height: 56,
                      child: ElevatedButton(
                        onPressed: _isLoading
                            ? null
                            : _requestNotificationPermission,
                        style: ElevatedButton.styleFrom(
                          backgroundColor: Colors.white,
                          foregroundColor: Color(0xFF6A4C93),
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(12),
                          ),
                          elevation: 4,
                        ),
                        child: _isLoading
                            ? CircularProgressIndicator(
                                valueColor: AlwaysStoppedAnimation<Color>(
                                  Color(0xFF6A4C93),
                                ),
                              )
                            : Row(
                                mainAxisAlignment: MainAxisAlignment.center,
                                children: [
                                  Icon(Icons.notifications, size: 20),
                                  SizedBox(width: 8),
                                  Text(
                                    'Enable Notifications',
                                    style: TextStyle(
                                      fontSize: 16,
                                      fontWeight: FontWeight.w600,
                                    ),
                                  ),
                                ],
                              ),
                      ),
                    ),

                    SizedBox(height: 16),

                    TextButton(
                      onPressed: _isLoading ? null : _skipNotifications,
                      child: Text(
                        'Skip for now',
                        style: TextStyle(
                          color: Colors.white.withOpacity(0.8),
                          fontSize: 16,
                          decoration: TextDecoration.underline,
                        ),
                      ),
                    ),
                  ],
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}