import 'package:dartz/dartz.dart';
import 'package:injectable/injectable.dart';
import '../../../data/models/license/license_dto.dart';
import '../../../data/repositories/license_repository.dart';
import '../../../core/errors/failures.dart';
import '../base_usecase.dart';

/// 라이선스 수정 UseCase
@injectable
class UpdateLicenseUseCase implements UseCase<LicenseDto, UpdateLicenseParams> {
  final LicenseRepository repository;

  UpdateLicenseUseCase(this.repository);

  @override
  Future<Either<Failure, LicenseDto>> call(UpdateLicenseParams params) async {
    try {
      // 비즈니스 로직: 만료일 검증
      if (params.expiryDate != null && params.startDate != null) {
        if (params.expiryDate!.isBefore(params.startDate!)) {
          return Left(ValidationFailure(message: '만료일은 시작일 이후여야 합니다'));
        }

        // 비즈니스 로직: 최소 라이선스 기간 검증 (30일)
        final duration = params.expiryDate!.difference(params.startDate!).inDays;
        if (duration < 30) {
          return Left(ValidationFailure(message: '라이선스 기간은 최소 30일 이상이어야 합니다'));
        }
      }

      final license = await repository.updateLicense(params.id, params.toMap());
      return Right(license);
    } catch (e) {
      return Left(ServerFailure(message: e.toString()));
    }
  }
}

/// 라이선스 수정 파라미터
class UpdateLicenseParams {
  final int id;
  final int? equipmentId;
  final int? companyId;
  final String? licenseType;
  final DateTime? startDate;
  final DateTime? expiryDate;
  final String? description;
  final double? cost;
  final String? status;

  UpdateLicenseParams({
    required this.id,
    this.equipmentId,
    this.companyId,
    this.licenseType,
    this.startDate,
    this.expiryDate,
    this.description,
    this.cost,
    this.status,
  });

  Map<String, dynamic> toMap() {
    final Map<String, dynamic> data = {};
    if (equipmentId != null) data['equipment_id'] = equipmentId;
    if (companyId != null) data['company_id'] = companyId;
    if (licenseType != null) data['license_type'] = licenseType;
    if (startDate != null) data['start_date'] = startDate!.toIso8601String();
    if (expiryDate != null) data['expiry_date'] = expiryDate!.toIso8601String();
    if (description != null) data['description'] = description;
    if (cost != null) data['cost'] = cost;
    if (status != null) data['status'] = status;
    return data;
  }
}