// 功能描述：充值配置、创建结果和入账事实的严格类型；版本：1.0.0。
import 'client_models.dart';

int rechargeCents(Object? value) {
  if (value is! int || value < 0) throw const FormatException('充值金额格式异常');
  return value;
}

/// 十进制文本直接转换为分，禁止浮点舍入、指数或负数。
int? parseRechargeAmount(String value) {
  final text = value.trim();
  if (!RegExp(r'^\d{1,9}(\.\d{1,2})?$').hasMatch(text)) return null;
  final parts = text.split('.');
  return int.parse(parts[0]) * 100 + (parts.length == 1 ? 0 : int.parse(parts[1].padRight(2, '0')));
}

class RechargeOptions {
  const RechargeOptions({
    required this.min,
    required this.max,
    required this.channels,
    this.agreement,
  });
  final int min, max;
  final List<RechargeChannel> channels;
  final RechargeAgreement? agreement;
  factory RechargeOptions.fromJson(Map<String, Object?> json) {
    final min = rechargeCents(json['min_amount']), max = rechargeCents(json['max_amount']);
    if (min < 1 || max < min || json['channels'] is! List) throw const FormatException('充值配置异常');
    return RechargeOptions(
      min: min,
      max: max,
      channels: [
        for (final item in json['channels'] as List)
          RechargeChannel.fromJson(Map<String, Object?>.from(item as Map)),
      ],
      agreement: json['agreement'] == null
          ? null
          : RechargeAgreement.fromJson(Map<String, Object?>.from(json['agreement'] as Map)),
    );
  }
}

class RechargeChannel {
  const RechargeChannel(this.name, {required this.app, required this.wap});
  final String name;
  final bool app, wap;
  String get title => name == 'wechat' ? '微信支付' : '支付宝';
  factory RechargeChannel.fromJson(Map<String, Object?> json) {
    if (!['wechat', 'alipay'].contains(json['channel']) ||
        json['app'] is! bool ||
        json['wap'] is! bool) {
      throw const FormatException('支付方式异常');
    }
    return RechargeChannel(
      json['channel'] as String,
      app: json['app'] as bool,
      wap: json['wap'] as bool,
    );
  }
}

class RechargeAgreement {
  const RechargeAgreement(this.identity, this.version, this.title, this.body);
  final String identity, title, body;
  final int version;
  factory RechargeAgreement.fromJson(Map<String, Object?> json) {
    if (json['identity'] is! String ||
        json['body'] is! String ||
        json['version'] is! int ||
        (json['identity'] as String).trim().isEmpty ||
        (json['body'] as String).trim().isEmpty ||
        (json['version'] as int) < 1) {
      throw const FormatException('充值协议不完整');
    }
    return RechargeAgreement(
      json['identity'] as String,
      json['version'] as int,
      json['title'] as String? ?? '充值协议',
      json['body'] as String,
    );
  }
}

/// 只有充值状态23表示钱包已经入账；渠道关闭或SDK返回都不能替代这一事实。
class RechargeRecord {
  const RechargeRecord({
    required this.identity,
    required this.number,
    required this.amount,
    required this.status,
    required this.channel,
    required this.createdAt,
    this.paymentStatus,
  });
  final String identity, number, channel;
  final int amount, status;
  final int? paymentStatus;
  final DateTime createdAt;
  bool get credited => status == 23;
  String get statusText => credited
      ? '已到账'
      : paymentStatus == 30
      ? '支付已关闭，未入账'
      : status == 10
      ? '待确认到账'
      : '状态待确认';
  String get amountText => moneyText(amount);
  factory RechargeRecord.fromJson(Map<String, Object?> json) {
    final date = DateTime.tryParse(json['created_at'] as String? ?? '');
    if ((json['identity'] as String? ?? '').isEmpty ||
        json['recharge_status'] is! int ||
        date == null) {
      throw const FormatException('充值记录不完整');
    }
    return RechargeRecord(
      identity: json['identity'] as String,
      number: json['recharge_no'] as String? ?? '',
      amount: rechargeCents(json['amount']),
      status: json['recharge_status'] as int,
      channel: json['channel'] as String? ?? '',
      createdAt: date.toLocal(),
      paymentStatus: json['payment_status'] as int?,
    );
  }
}

class RechargeRecordPage {
  const RechargeRecordPage(this.items, this.nextCursor);
  final List<RechargeRecord> items;
  final String nextCursor;
}