bharat_erp/lib/shared/models/asset_model.dart

import 'package:freezed_annotation/freezed_annotation.dart';

part 'asset_model.freezed.dart';
part 'asset_model.g.dart';

String _idFromJson(Object? value) => value?.toString() ?? '';

int? _intFromJsonNullable(Object? value) {
  if (value == null) return null;
  if (value is int) return value;
  if (value is num) return value.toInt();
  return int.tryParse(value.toString());
}

double? _doubleFromJsonNullable(Object? value) {
  if (value == null) return null;
  if (value is double) return value;
  if (value is num) return value.toDouble();
  return double.tryParse(value.toString());
}

DateTime _dateFromJson(Object? value) {
  if (value is DateTime) return value;
  return DateTime.parse(value.toString());
}

DateTime? _dateFromJsonNullable(Object? value) {
  if (value == null) return null;
  if (value is DateTime) return value;
  return DateTime.tryParse(value.toString());
}

Object? _readNestedName(Map<dynamic, dynamic> json, String nestedKey) {
  final nested = json[nestedKey];
  if (nested is Map) return nested['name'];
  return null;
}

Object? _readAssetCategoryName(Map<dynamic, dynamic> json, String key) {
  final flat = json['asset_category_name'];
  if (flat is String && flat.isNotEmpty) return flat;
  return _readNestedName(json, 'asset_category');
}

Object? _readPlantName(Map<dynamic, dynamic> json, String key) {
  final flat = json['plant_name'];
  if (flat is String && flat.isNotEmpty) return flat;
  return _readNestedName(json, 'plant');
}

Object? _readAssetCategoryId(Map<dynamic, dynamic> json, String key) {
  final flat = json['asset_category_id'];
  if (flat != null) return flat;
  final nested = json['asset_category'];
  if (nested is Map) return nested['id'];
  return null;
}

Object? _readPlantId(Map<dynamic, dynamic> json, String key) {
  final flat = json['plant_id'];
  if (flat != null) return flat;
  final nested = json['plant'];
  if (nested is Map) return nested['id'];
  return null;
}

@freezed
class AssetCategoryModel with _$AssetCategoryModel {
  const factory AssetCategoryModel({
    @JsonKey(fromJson: _idFromJson) required String id,
    required String code,
    required String name,
    @JsonKey(name: 'code_prefix') String? codePrefix,
    @JsonKey(name: 'default_useful_life_years', fromJson: _intFromJsonNullable)
    int? defaultUsefulLifeYears,
    @JsonKey(name: 'default_depreciation_method') String? defaultDepreciationMethod,
    @JsonKey(name: 'is_active') @Default(true) bool isActive,
    DateTime? createdAt,
    DateTime? updatedAt,
  }) = _AssetCategoryModel;

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

@freezed
class AssetModel with _$AssetModel {
  const factory AssetModel({
    @JsonKey(fromJson: _idFromJson) required String id,
    @JsonKey(name: 'asset_name') required String assetName,
    @JsonKey(name: 'asset_code') String? assetCode,
    @JsonKey(
      name: 'asset_category_id',
      readValue: _readAssetCategoryId,
      fromJson: _intFromJsonNullable,
    )
    int? assetCategoryId,
    @JsonKey(name: 'asset_category_name', readValue: _readAssetCategoryName)
    String? assetCategoryName,
    @JsonKey(name: 'plant_id', readValue: _readPlantId, fromJson: _intFromJsonNullable)
    int? plantId,
    @JsonKey(name: 'plant_name', readValue: _readPlantName) String? plantName,
    @JsonKey(name: 'warranty_expiry_date', fromJson: _dateFromJsonNullable)
    DateTime? warrantyExpiryDate,
    @JsonKey(name: 'purchase_cost', fromJson: _doubleFromJsonNullable) double? purchaseCost,
    String? status,
    @JsonKey(name: 'is_active') @Default(true) bool isActive,
    @JsonKey(name: 'created_at', fromJson: _dateFromJsonNullable) DateTime? createdAt,
    @JsonKey(name: 'updated_at', fromJson: _dateFromJsonNullable) DateTime? updatedAt,
  }) = _AssetModel;

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

@freezed
class AmcContractModel with _$AmcContractModel {
  const factory AmcContractModel({
    @JsonKey(fromJson: _idFromJson) required String id,
    @JsonKey(name: 'asset_id', fromJson: _idFromJson) String? assetId,
    @JsonKey(name: 'vendor_id', fromJson: _intFromJsonNullable) int? vendorId,
    @JsonKey(name: 'vendor_name') String? vendorName,
    @JsonKey(name: 'contract_no') String? contractNo,
    @JsonKey(name: 'contract_type') String? contractType,
    @JsonKey(name: 'start_date', fromJson: _dateFromJson) required DateTime startDate,
    @JsonKey(name: 'end_date', fromJson: _dateFromJson) required DateTime endDate,
    @JsonKey(name: 'annual_cost', fromJson: _doubleFromJsonNullable) double? annualCost,
    @Default('active') String status,
    DateTime? createdAt,
  }) = _AmcContractModel;

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

@freezed
class ServiceVisitModel with _$ServiceVisitModel {
  const factory ServiceVisitModel({
    @JsonKey(fromJson: _idFromJson) required String id,
    @JsonKey(name: 'asset_id', fromJson: _idFromJson) String? assetId,
    @JsonKey(name: 'visit_type') required String visitType,
    @JsonKey(name: 'visit_date', fromJson: _dateFromJson) required DateTime visitDate,
    @JsonKey(name: 'complaint_no') String? complaintNo,
    @JsonKey(name: 'work_done') String? workDone,
    @JsonKey(name: 'next_service_date', fromJson: _dateFromJsonNullable)
    DateTime? nextServiceDate,
    @Default('COMPLETED') String status,
    DateTime? createdAt,
  }) = _ServiceVisitModel;

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

@freezed
class InsurancePolicyModel with _$InsurancePolicyModel {
  const factory InsurancePolicyModel({
    @JsonKey(fromJson: _idFromJson) required String id,
    @JsonKey(name: 'asset_id', fromJson: _idFromJson) String? assetId,
    @JsonKey(name: 'policy_no') required String policyNo,
    @JsonKey(name: 'insurer_name') required String insurerName,
    @JsonKey(name: 'policy_type') String? policyType,
    @JsonKey(name: 'sum_insured', fromJson: _doubleFromJsonNullable) double? sumInsured,
    @JsonKey(name: 'policy_start_date', fromJson: _dateFromJson)
    required DateTime policyStartDate,
    @JsonKey(name: 'policy_end_date', fromJson: _dateFromJson) required DateTime policyEndDate,
    @Default('active') String status,
    DateTime? createdAt,
  }) = _InsurancePolicyModel;

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

@freezed
class AssetAlertModel with _$AssetAlertModel {
  const factory AssetAlertModel({
    @JsonKey(fromJson: _idFromJson) required String id,
    @JsonKey(name: 'asset_id', fromJson: _idFromJson) String? assetId,
    @JsonKey(name: 'asset_name') String? assetName,
    @JsonKey(name: 'asset_code') String? assetCode,
    String? type,
    String? title,
    String? message,
    @JsonKey(name: 'expiry_date', fromJson: _dateFromJsonNullable) DateTime? expiryDate,
    @JsonKey(name: 'due_date', fromJson: _dateFromJsonNullable) DateTime? dueDate,
    @JsonKey(name: 'days_remaining', fromJson: _intFromJsonNullable) int? daysRemaining,
    String? status,
    @JsonKey(name: 'plant_name') String? plantName,
  }) = _AssetAlertModel;

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