import 'package:freezed_annotation/freezed_annotation.dart';

part 'vendor_stats_dto.freezed.dart';
part 'vendor_stats_dto.g.dart';

@freezed
class VendorStatsDto with _$VendorStatsDto {
  const VendorStatsDto._(); // Private constructor for getters
  
  const factory VendorStatsDto({
    @JsonKey(name: 'total_vendors')
    @Default(0) int totalVendors,
    @JsonKey(name: 'active_vendors')
    @Default(0) int activeVendors,
    @JsonKey(name: 'inactive_vendors')
    @Default(0) int inactiveVendors,
    @JsonKey(name: 'recent_vendors')
    @Default(0) int recentVendors,
    @JsonKey(name: 'vendors_with_models')
    @Default(0) int vendorsWithModels,
    @JsonKey(name: 'total_models')
    @Default(0) int totalModels,
    @JsonKey(name: 'updated_at')
    DateTime? updatedAt,
  }) = _VendorStatsDto;

  // 계산 속성들
  double get activeVendorRatio => totalVendors > 0 ? (activeVendors / totalVendors) : 0.0;
  double get inactiveVendorRatio => totalVendors > 0 ? (inactiveVendors / totalVendors) : 0.0;
  double get vendorsWithModelsRatio => totalVendors > 0 ? (vendorsWithModels / totalVendors) : 0.0;
  double get averageModelsPerVendor => vendorsWithModels > 0 ? (totalModels / vendorsWithModels) : 0.0;

  factory VendorStatsDto.fromJson(Map<String, dynamic> json) => _$VendorStatsDtoFromJson(json);
}