import 'package:eatvio_app/core/theme/custom_text_style.dart';
import 'package:eatvio_app/core/theme/theme_helper.dart';
import 'package:eatvio_app/core/utils/toasts.dart';
import 'package:eatvio_app/core/widgets/custom_outlined_button.dart';
import 'package:eatvio_app/features/registration/presentation/bloc/verify_email_cubit/verify_email_cubit.dart';
import 'package:eatvio_app/features/registration/presentation/bloc/verify_email_cubit/verify_email_state.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';

class ChangeEmailDialog extends StatefulWidget {
  final String currentEmail;
  final VerifyEmailCubit verifyEmailCubit;

  const ChangeEmailDialog({super.key, required this.currentEmail, required this.verifyEmailCubit});

  @override
  State<ChangeEmailDialog> createState() => _ChangeEmailDialogState();
}

class _ChangeEmailDialogState extends State<ChangeEmailDialog> {
  final TextEditingController _emailController = TextEditingController();
  final FocusNode _emailFocusNode = FocusNode();
  bool _isLoading = false;
  String? _errorText;

  @override
  void initState() {
    super.initState();
    _emailController.text = widget.currentEmail;
  }

  @override
  void dispose() {
    _emailController.dispose();
    _emailFocusNode.dispose();
    super.dispose();
  }

  bool _isValidEmail(String email) {
    return RegExp(r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$').hasMatch(email);
  }

  void _validateEmail() {
    final email = _emailController.text.trim();
    if (email.isEmpty) {
      setState(() {
        _errorText = 'Введите email';
      });
    } else if (!_isValidEmail(email)) {
      setState(() {
        _errorText = 'Введите корректный email';
      });
    } else if (email == widget.currentEmail) {
      setState(() {
        _errorText = 'Новый email должен отличаться от текущего';
      });
    } else {
      setState(() {
        _errorText = null;
      });
    }
  }

  Future<void> _changeEmail() async {
    _validateEmail();
    if (_errorText != null) return;

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

    try {
      await widget.verifyEmailCubit.changeEmail(_emailController.text.trim());
      // Диалог закроется автоматически при успешной смене email через основной экран
    } catch (e) {
      if (mounted) {
        showErrorToast('Ошибка при смене email. Попробуйте снова.');
        setState(() {
          _isLoading = false;
        });
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return BlocProvider.value(
      value: widget.verifyEmailCubit,
      child: BlocListener<VerifyEmailCubit, VerifyEmailState>(
        listener: (context, state) {
          if (state is VerifyEmailStateChangeEmailSuccess) {
            Navigator.of(context).pop(); // Закрываем диалог при успешной смене
          } else if (state is VerifyEmailStateChangeEmailError) {
            setState(() {
              _isLoading = false;
            });
          }
        },
        child: Dialog(
          shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
          child: Padding(
            padding: const EdgeInsets.all(24.0),
            child: Column(
              mainAxisSize: MainAxisSize.min,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text('Сменить email', style: TextStyles.headingXLSemibold.copyWith(color: appTheme.black)),
                const SizedBox(height: 16),
                Text('Введите новый email для получения кода подтверждения', style: TextStyles.textSMedium.copyWith(color: appTheme.gray)),
                const SizedBox(height: 20),
                TextField(
                  controller: _emailController,
                  focusNode: _emailFocusNode,
                  keyboardType: TextInputType.emailAddress,
                  decoration: InputDecoration(
                    hintText: 'Введите новый email',
                    hintStyle: TextStyles.textSMedium.copyWith(color: appTheme.gray),
                    border: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(12),
                      borderSide: BorderSide(color: appTheme.gray),
                    ),
                    focusedBorder: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(12),
                      borderSide: BorderSide(color: appTheme.blueA400),
                    ),
                    errorBorder: OutlineInputBorder(
                      borderRadius: BorderRadius.circular(12),
                      borderSide: BorderSide(color: appTheme.red),
                    ),
                    errorText: _errorText,
                    contentPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 16),
                  ),
                  onChanged: (_) => _validateEmail(),
                  onSubmitted: (_) => _changeEmail(),
                ),
                const SizedBox(height: 24),
                Row(
                  children: [
                    Expanded(
                      child: CustomOutlinedButton(
                        text: 'Отмена',
                        height: 52,
                        buttonTextStyle: TextStyles.textMSemibold.copyWith(color: appTheme.black),
                        buttonStyle: ButtonStyle(
                          side: const WidgetStatePropertyAll(BorderSide.none),
                          backgroundColor: WidgetStatePropertyAll(appTheme.lightGray0),
                        ),
                        onPressed: () => Navigator.of(context).pop(),
                      ),
                    ),
                    const SizedBox(width: 12),
                    Expanded(
                      child: CustomOutlinedButton(
                        text: _isLoading ? 'Отправка...' : 'Сменить',
                        height: 52,
                        isDisabled: _isLoading,
                        buttonTextStyle: TextStyles.textMSemibold.copyWith(color: appTheme.whiteA700),
                        buttonStyle: ButtonStyle(
                          side: const WidgetStatePropertyAll(BorderSide.none),
                          backgroundColor: WidgetStatePropertyAll(_isLoading ? appTheme.gray : appTheme.blueA400),
                        ),
                        onPressed: _isLoading ? null : _changeEmail,
                      ),
                    ),
                  ],
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}