import { IsOptional, IsDateString, IsArray, IsString } from 'class-validator';
import { ApiPropertyOptional } from '@nestjs/swagger';
import { Type } from 'class-transformer';

export class SyncRequestDto {
  @ApiPropertyOptional({
    description: 'Last sync timestamp (ISO 8601). Returns only changes since this time.',
    example: '2025-01-15T10:30:00.000Z',
  })
  @IsOptional()
  @IsDateString({}, { message: 'Last sync timestamp must be a valid ISO 8601 date' })
  lastSyncTimestamp?: string;

  @ApiPropertyOptional({
    description: 'Specific entities to sync. If not provided, syncs all entities.',
    example: ['products', 'categories'],
    isArray: true,
    type: String,
  })
  @IsOptional()
  @IsArray({ message: 'Entities must be an array' })
  @IsString({ each: true, message: 'Each entity must be a string' })
  entities?: string[];
}