import { ApiProperty } from '@nestjs/swagger';
import { Transform } from 'class-transformer';
import { ArrayMaxSize, ArrayMinSize, IsArray, IsString } from 'class-validator';

export class ValuationComparisonDto {
  @ApiProperty({
    description: 'Array of property IDs to compare (2-5 properties)',
    example: ['prop-1', 'prop-2', 'prop-3'],
    type: [String],
  })
  @IsArray()
  @ArrayMinSize(2)
  @ArrayMaxSize(5)
  @IsString({ each: true })
  @Transform(({ value }) => (Array.isArray(value) ? value : [value]))
  propertyIds!: string[];
}