import { ApiPropertyOptional } from '@nestjs/swagger';
import { Transform, Type } from 'class-transformer';
import { IsBoolean, IsInt, IsOptional, IsString, Min } from 'class-validator';

export function toOptionalBoolean(value: unknown): boolean | undefined {
  if (value === undefined || value === null || value === '') return undefined;
  if (value === true || value === 'true' || value === '1') return true;
  if (value === false || value === 'false' || value === '0') return false;
  return undefined;
}

export class CursorPageQueryDto {
  @ApiPropertyOptional({ default: 50 })
  @IsOptional()
  @Type(() => Number)
  @IsInt()
  @Min(1)
  limit?: number;

  @ApiPropertyOptional()
  @IsOptional()
  @IsString()
  cursor?: string;

  @ApiPropertyOptional({ default: false })
  @IsOptional()
  @Transform(({ value }) => toOptionalBoolean(value))
  @IsBoolean()
  include_inactive?: boolean;
}