import 'package:flutter/material.dart';

/// 记账类型枚举
enum RecordType {
  expense,  // 支出
  income,   // 收入
}

/// 记账分类模型
class Category {
  final String id;
  final String name;
  final IconData icon;
  final RecordType type;
  final String? parentId;  // 为未来二级分类预留
  
  const Category({
    required this.id,
    required this.name,
    required this.icon,
    required this.type,
    this.parentId,
  });
}

/// 记账记录模型
class Record {
  final String id;
  final RecordType type;
  final String categoryId;
  final String? note;
  final double amount;
  final DateTime createTime;
  final String? accountId;  // 为未来账户功能预留
  final List<String>? imageUrls;  // 为未来配图功能预留

  Record({
    required this.id,
    required this.type,
    required this.categoryId,
    this.note,
    required this.amount,
    required this.createTime,
    this.accountId,
    this.imageUrls,
  });

  // 转换为JSON格式，方便存储
  Map<String, dynamic> toJson() => {
    'id': id,
    'type': type.index,
    'categoryId': categoryId,
    'note': note,
    'amount': amount,
    'createTime': createTime.toIso8601String(),
    'accountId': accountId,
    'imageUrls': imageUrls,
  };

  // 从JSON格式转换回对象
  factory Record.fromJson(Map<String, dynamic> json) => Record(
    id: json['id'],
    type: RecordType.values[json['type']],
    categoryId: json['categoryId'],
    note: json['note'],
    amount: json['amount'],
    createTime: DateTime.parse(json['createTime']),
    accountId: json['accountId'],
    imageUrls: json['imageUrls'] != null 
        ? List<String>.from(json['imageUrls'])
        : null,
  );
}