import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:japp_flutter/core/constants/options.dart';
import 'package:japp_flutter/features/widgets/app_dropdown.dart';


class MockPage extends StatelessWidget {
  const MockPage({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter 表单示例',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyFormPage(),
    );
  }
}

// 表单数据模型
class FormData {
  String name;
  String email;
  String phone;
  String password;
  bool agreeTerms;
  DateTime? startDate;
  DateTime? endDate;
  int? difficult;
  FormData({
    this.name = '',
    this.email = 'fin@qq.com',
    this.phone = '13770656091',
    this.password = '',
    this.agreeTerms = false,
    this.startDate,
    this.endDate,
    this.difficult = 2,
  });

  // 转换为Map方便打印
  Map<String, dynamic> toMap() {
    return {
      'name': name,
      'email': email,
      'phone': phone,
      'password': password.replaceAll(RegExp(r'.'), '*'), // 密码用*号代替
      'agreeTerms': agreeTerms,
      'startDate': startDate != null ? DateFormat('yyyy-MM-dd').format(startDate!) : null,
      'endDate': endDate != null ? DateFormat('yyyy-MM-dd').format(endDate!) : null,
      'difficult':difficult
    };
  }
}



// 难度等级模型
class DifficultyLevel {
  final int value;
  final String label;
  final IconData? icon;

  const DifficultyLevel({
    required this.value,
    required this.label,
    this.icon,
  });
}

// 预定义的难度等级
const List<DifficultyLevel> difficultyLevels = [
  DifficultyLevel(value: 1, label: '简单', icon: Icons.sentiment_very_satisfied),
  DifficultyLevel(value: 2, label: '中等', icon: Icons.sentiment_satisfied),
  DifficultyLevel(value: 3, label: '困难', icon: Icons.sentiment_dissatisfied),
  DifficultyLevel(value: 4, label: '专家', icon: Icons.sentiment_very_dissatisfied),
];


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

  @override
  State<MyFormPage> createState() => _MyFormPageState();
}

class _MyFormPageState extends State<MyFormPage> {
  final _formKey = GlobalKey<FormState>();
  final FormData _formData = FormData(
      startDate: DateTime.now(), // 默认开始日期为今天
      endDate: DateTime.now().add(const Duration(days: 7)), // 默认结束日期为7天后
  );

  // 选择开始日期
  Future<void> _selectStartDate() async {
    final DateTime? picked = await showDatePicker(
      context: context,
      initialDate: _formData.startDate ?? DateTime.now(),
      firstDate: DateTime(2000),
      lastDate: DateTime(2100),
    );
    if (picked != null && picked != _formData.startDate) {
      setState(() {
        _formData.startDate = picked;
        // 如果结束日期早于开始日期，重置结束日期
        if (_formData.endDate != null && _formData.endDate!.isBefore(picked)) {
          _formData.endDate = null;
        }
      });
    }
  }

  // 选择结束日期
  Future<void> _selectEndDate() async {
    final DateTime? picked = await showDatePicker(
      context: context,
      initialDate: _formData.endDate ?? (_formData.startDate ?? DateTime.now()),
      firstDate: _formData.startDate ?? DateTime.now(),
      lastDate: DateTime(2100),
    );
    if (picked != null && picked != _formData.endDate) {
      setState(() {
        _formData.endDate = picked;
      });
    }
  }


  // 提交表单
  void _submitForm() {
    if (_formKey.currentState!.validate()) {
      _formKey.currentState!.save();
      
      // 获取完整的难度信息（不仅仅是value）
      final selectedDifficulty = difficultyLevels.firstWhere(
        (level) => level.value == _formData.difficult,
        orElse: () => const DifficultyLevel(value: 0, label: '未知'),
      );

      print('表单提交数据: ${_formData.toMap()}');
      
      // 显示提交成功的提示
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('表单提交成功! 数据已打印到控制台')),
      );
    }
  }


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Flutter 表单示例'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Form(
          key: _formKey,
          child: ListView(
            children: [
              TextFormField(
                decoration: const InputDecoration(
                  labelText: '姓名',
                  hintText: '请输入您的姓名',
                  border: OutlineInputBorder(),
                ),
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return '请输入姓名';
                  }
                  return null;
                },
                onSaved: (value) => _formData.name = value!,
              ),
              const SizedBox(height: 16),
              TextFormField(
                initialValue: _formData.email,
                decoration: const InputDecoration(
                  labelText: '电子邮件',
                  hintText: '请输入您的电子邮件',
                  border: OutlineInputBorder(),
                ),
                keyboardType: TextInputType.emailAddress,
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return '请输入电子邮件';
                  }
                  if (!RegExp(r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$').hasMatch(value)) {
                    return '请输入有效的电子邮件地址';
                  }
                  return null;
                },
                onSaved: (value) => _formData.email = value!,
              ),
              const SizedBox(height: 16),
              TextFormField(
                initialValue: _formData.phone,
                decoration: const InputDecoration(
                  labelText: '手机号码',
                  hintText: '请输入您的手机号码',
                  border: OutlineInputBorder(),
                ),
                keyboardType: TextInputType.phone,
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return '请输入手机号码';
                  }
                  if (!RegExp(r'^[0-9]{11}$').hasMatch(value)) {
                    return '请输入有效的11位手机号码';
                  }
                  return null;
                },
                onSaved: (value) => _formData.phone = value!,
              ),
              const SizedBox(height: 16),
              TextFormField(
                decoration: const InputDecoration(
                  labelText: '密码',
                  hintText: '请输入您的密码',
                  border: OutlineInputBorder(),
                ),
                obscureText: true,
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return '请输入密码';
                  }
                  if (value.length < 6) {
                    return '密码长度不能少于6位';
                  }
                  return null;
                },
                onSaved: (value) => _formData.password = value!,
              ),
              const SizedBox(height: 16),
              // 开始日期选择
              InkWell(
                onTap: _selectStartDate,
                child: InputDecorator(
                  decoration: const InputDecoration(
                    labelText: '开始日期',
                    border: OutlineInputBorder(),
                  ),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: [
                      Text(
                        _formData.startDate != null
                            ? DateFormat('yyyy-MM-dd').format(_formData.startDate!)
                            : '请选择开始日期',
                      ),
                      const Icon(Icons.calendar_today, size: 20),
                    ],
                  ),
                ),
              ),
              const SizedBox(height: 16),
              // 结束日期选择
              InkWell(
                onTap: _formData.startDate == null
                    ? null
                    : _selectEndDate,
                child: InputDecorator(
                  decoration: const InputDecoration(
                    labelText: '结束日期',
                    border: OutlineInputBorder(),
                  ),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: [
                      Text(
                        _formData.endDate != null
                            ? DateFormat('yyyy-MM-dd').format(_formData.endDate!)
                            : '请选择结束日期',
                      ),
                      const Icon(Icons.calendar_today, size: 20),
                    ],
                  ),
                ),
              ),
              const SizedBox(height: 16),
              // 难度选择下拉框
              // DropdownButtonFormField<int>(
              //   decoration: const InputDecoration(
              //     labelText: '挑战难度',
              //     border: OutlineInputBorder(),
              //   ),
              //   value: _formData.difficult,
              //   items: difficultyLevels.map((level) {
              //     return DropdownMenuItem<int>(
              //       value: level.value,
              //       child: Row(
              //         children: [
              //           if (level.icon != null) 
              //             Icon(level.icon, size: 20),
              //           const SizedBox(width: 8),
              //           Text(level.label),
              //         ],
              //       ),
              //     );
              //   }).toList(),
              //   onChanged: (value) {
              //     setState(() {
              //       _formData.difficult = value;
              //     });
              //   },
              //   validator: (value) {
              //     if (value == null) {
              //       return '请选择难度等级';
              //     }
              //     return null;
              //   },
              //   onSaved: (value) => _formData.difficult = value,
              // ),

              AppDropdown(
                label: '挑战难度', 
                value: _formData.difficult, 
                items: challengeDifficultyOpts, 
                onChanged: (value) {
                  setState(() {
                    _formData.difficult = value;
                  });
                },
              ),


              const SizedBox(height: 16),

              Row(
                children: [
                  Checkbox(
                    value: _formData.agreeTerms,
                    onChanged: (value) {
                      setState(() {
                        _formData.agreeTerms = value!;
                      });
                    },
                  ),
                  const Text('我同意用户协议'),
                ],
              ),
              const SizedBox(height: 24),
              ElevatedButton(
                onPressed: _submitForm,
                style: ElevatedButton.styleFrom(
                  padding: const EdgeInsets.symmetric(vertical: 16),
                ),
                child: const Text('提交表单'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}