note-book/frontend/lib/screens/auth/bind_email_screen.dart

import 'dart:ui';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../../providers/auth_provider.dart';
import '../../theme/colors.dart';

class BindEmailScreen extends ConsumerStatefulWidget {
  const BindEmailScreen({super.key});

  @override
  ConsumerState<BindEmailScreen> createState() => _BindEmailScreenState();
}

class _BindEmailScreenState extends ConsumerState<BindEmailScreen> {
  final _emailController = TextEditingController();
  final _formKey = GlobalKey<FormState>();
  bool _isLoading = false;

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

  String? _validateEmail(String? value) {
    if (value == null || value.isEmpty) {
      return '请输入邮箱';
    }
    final emailRegex = RegExp(r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$');
    if (!emailRegex.hasMatch(value)) {
      return '请输入有效的邮箱地址';
    }
    return null;
  }

  Future<void> _handleBind() async {
    if (!_formKey.currentState!.validate()) return;

    setState(() => _isLoading = true);

    try {
      final authApi = ref.read(authApiProvider);
      final result = await authApi.bindEmail(_emailController.text);

      if (result['success'] == true) {
        if (mounted) {
          Navigator.pop(context);
          ScaffoldMessenger.of(context).showSnackBar(
            const SnackBar(
              content: Text('邮箱绑定成功'),
              backgroundColor: AppColors.income,
            ),
          );
        }
      } else {
        if (mounted) {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(
              content: Text(result['error'] ?? '绑定失败'),
              backgroundColor: AppColors.expense,
            ),
          );
        }
      }
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text('网络错误: $e'),
            backgroundColor: AppColors.expense,
          ),
        );
      }
    } finally {
      if (mounted) {
        setState(() => _isLoading = false);
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        decoration: const BoxDecoration(
          gradient: LinearGradient(
            begin: Alignment.topLeft,
            end: Alignment.bottomRight,
            colors: [
              Color(0xFFFF6B35),
              Color(0xFFFF9F5B),
            ],
          ),
        ),
        child: SafeArea(
          child: Center(
            child: SingleChildScrollView(
              padding: const EdgeInsets.symmetric(horizontal: 32),
              child: Form(
                key: _formKey,
                child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    const Text(
                      '绑定邮箱',
                      style: TextStyle(
                        fontSize: 32,
                        fontWeight: FontWeight.bold,
                        color: Colors.white,
                      ),
                    ),
                    const SizedBox(height: 8),
                    const Text(
                      '请输入您的邮箱地址',
                      style: TextStyle(
                        fontSize: 16,
                        color: Colors.white70,
                      ),
                    ),
                    const SizedBox(height: 48),
                    _buildGlassInput(
                      child: TextFormField(
                        controller: _emailController,
                        keyboardType: TextInputType.emailAddress,
                        style: const TextStyle(color: AppColors.textPrimary),
                        decoration: const InputDecoration(
                          hintText: '请输入邮箱',
                          hintStyle: TextStyle(color: AppColors.textSecondary),
                          border: InputBorder.none,
                          prefixIcon: Icon(Icons.email_outlined, color: AppColors.brand),
                        ),
                        validator: _validateEmail,
                      ),
                    ),
                    const SizedBox(height: 32),
                    SizedBox(
                      width: double.infinity,
                      height: 56,
                      child: ElevatedButton(
                        onPressed: _isLoading ? null : _handleBind,
                        style: ElevatedButton.styleFrom(
                          backgroundColor: Colors.white,
                          foregroundColor: AppColors.brand,
                          disabledBackgroundColor: Colors.white.withOpacity(0.6),
                          shape: RoundedRectangleBorder(
                            borderRadius: BorderRadius.circular(16),
                          ),
                          elevation: 0,
                        ),
                        child: _isLoading
                            ? const SizedBox(
                                width: 24,
                                height: 24,
                                child: CircularProgressIndicator(
                                  strokeWidth: 2,
                                  valueColor: AlwaysStoppedAnimation<Color>(AppColors.brand),
                                ),
                              )
                            : const Text(
                                '绑定',
                                style: TextStyle(
                                  fontSize: 16,
                                  fontWeight: FontWeight.w600,
                                ),
                              ),
                      ),
                    ),
                  ],
                ),
              ),
            ),
          ),
        ),
      ),
    );
  }

  Widget _buildGlassInput({required Widget child}) {
    return Container(
      decoration: BoxDecoration(
        color: Colors.white.withOpacity(0.8),
        borderRadius: BorderRadius.circular(14),
        border: Border.all(color: Colors.white.withOpacity(0.8)),
        boxShadow: [
          BoxShadow(
            color: AppColors.brand.withOpacity(0.06),
            blurRadius: 32,
            offset: const Offset(0, 8),
          ),
        ],
      ),
      child: ClipRRect(
        borderRadius: BorderRadius.circular(14),
        child: BackdropFilter(
          filter: ImageFilter.blur(sigmaX: 30, sigmaY: 30),
          child: Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 4),
            child: child,
          ),
        ),
      ),
    );
  }
}