import { ApiProperty } from '@nestjs/swagger';
import { IsString, IsNotEmpty, MaxLength } from 'class-validator';

export class QueryDto {
  @ApiProperty({
    description: 'Natural-language question about the fleet (max 2000 chars).',
    example: 'How many trips delivered late this week?',
  })
  @IsString()
  @IsNotEmpty()
  @MaxLength(2000, {
    message:
      'Question must be 2000 characters or fewer. Long prompts are blocked to control cost.',
  })
  question!: string;
}