import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:flutter/material.dart';

import '../constants.dart';
import '../services/auth/auth_service.dart';

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

  @override
  State<FeedbackDialog> createState() => _FeedbackDialogState();
}

class _FeedbackDialogState extends State<FeedbackDialog> {
  final TextEditingController _feedbackController = TextEditingController();
  final GlobalKey<FormState> _formKey = GlobalKey();

  // get instance of firestore and auth
  final FirebaseFirestore _firestore = FirebaseFirestore.instance;
  final AuthService _authService = AuthService();

  @override
  void dispose() {
    _feedbackController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      content: Form(
        key: _formKey,
        child: TextFormField(
          controller: _feedbackController,
          keyboardType: TextInputType.multiline,
          decoration: const InputDecoration(
            hintText: 'Please enter your feedback here',
            filled: true,
          ),
          maxLines: 5,
          maxLength: 4096,
          textInputAction: TextInputAction.done,
          validator: (String? text) {
            if (text == null || text.isEmpty) {
              return 'Please enter something';
            }
            return null;
          },
        ),
      ),
      actions: [
        TextButton(
          child: const Text('Cancel'),
          onPressed: () => Navigator.pop(context),
        ),
        TextButton(
          style: TextButton.styleFrom(
            backgroundColor: Theme.of(context).colorScheme.secondary,
          ),
          child: const Text(
            'Send feedback',
            style: TextStyle(
              color: Colors.blue,
            ),
          ),
          onPressed: () async {
            // Only if the input form is valid (the user has entered text)
            if (_formKey.currentState!.validate()) {
              String message;
              bool error = false;

              try {
                // Get a reference to the feedbacks collection
                final collection =
                    _firestore.collection(Constants.dbCollectionFeedbacks);

                // Write the server's timestamp and the user's feedback
                await collection.add({
                  'timestamp': FieldValue.serverTimestamp(),
                  'feedback': _feedbackController.text,
                  'user': _authService.getCurrentUser()!.uid,
                  'email': _authService.getCurrentUser()!.email,
                });

                message = 'Feedback sent successfully. Thank you!';
              } catch (e) {
                message = 'Error when sending feedback: ${e.toString()}';
                error = true;
              }

              // Show a snackBar with the result
              if (context.mounted) {
                ScaffoldMessenger.of(context).showSnackBar(SnackBar(
                  content: Text(message),
                  backgroundColor: error ? Colors.red : Colors.green,
                ));
                Navigator.pop(context);
              }
            }
          },
        )
      ],
    );
  }
}