/// 报表汇总数据
class ReportSummary {
  final double totalAmount;
  final int totalCount;
  final int approvedCount;
  final double approvedAmount;

  const ReportSummary({
    this.totalAmount = 0,
    this.totalCount = 0,
    this.approvedCount = 0,
    this.approvedAmount = 0,
  });

  factory ReportSummary.fromJson(Map<String, dynamic> json) {
    return ReportSummary(
      totalAmount: (json['totalAmount'] as num?)?.toDouble() ?? 0,
      totalCount: json['totalCount'] as int? ?? 0,
      approvedCount: json['approvedCount'] as int? ?? 0,
      approvedAmount: (json['approvedAmount'] as num?)?.toDouble() ?? 0,
    );
  }
}

/// 月度报表数据
class ReportMonthlyItem {
  final int month;
  final double amount;
  final double approvedAmount;
  final int count;

  const ReportMonthlyItem({
    this.month = 0,
    this.amount = 0,
    this.approvedAmount = 0,
    this.count = 0,
  });

  factory ReportMonthlyItem.fromJson(Map<String, dynamic> json) {
    return ReportMonthlyItem(
      month: json['month'] as int? ?? 0,
      amount: (json['amount'] as num?)?.toDouble() ?? 0,
      approvedAmount: (json['approvedAmount'] as num?)?.toDouble() ?? 0,
      count: json['count'] as int? ?? 0,
    );
  }
}

/// 报表明细项
class ReportDetailItem {
  final String billNo;
  final String? billDate;
  final double amount;
  final bool isApproved;
  final String reason;

  const ReportDetailItem({
    this.billNo = '',
    this.billDate,
    this.amount = 0,
    this.isApproved = false,
    this.reason = '',
  });

  factory ReportDetailItem.fromJson(Map<String, dynamic> json) {
    return ReportDetailItem(
      billNo: json['billNo'] as String? ?? '',
      billDate: json['billDate'] as String?,
      amount: (json['amount'] as num?)?.toDouble() ?? 0,
      isApproved: json['isApproved'] as bool? ?? false,
      reason: json['reason'] as String? ?? '',
    );
  }
}

/// 报表完整数据
class ReportData {
  final ReportSummary summary;
  final List<ReportMonthlyItem> monthly;
  final List<ReportDetailItem> details;

  const ReportData({
    this.summary = const ReportSummary(),
    this.monthly = const [],
    this.details = const [],
  });

  factory ReportData.fromJson(Map<String, dynamic> json) {
    return ReportData(
      summary: json['summary'] != null
          ? ReportSummary.fromJson(json['summary'] as Map<String, dynamic>)
          : const ReportSummary(),
      monthly: (json['monthly'] as List<dynamic>?)
              ?.map((e) => ReportMonthlyItem.fromJson(e as Map<String, dynamic>))
              .toList() ??
          [],
      details: (json['details'] as List<dynamic>?)
              ?.map((e) => ReportDetailItem.fromJson(e as Map<String, dynamic>))
              .toList() ??
          [],
    );
  }
}