import { ApiProperty } from '@nestjs/swagger';
import { Transform, Type } from 'class-transformer';
import { IsArray, IsInt, IsNumber, IsOptional, IsString, Max, Min } from 'class-validator';

export class FindNearbyPoiDto {
  @ApiProperty({ example: 10.762622 }) @Type(() => Number) @IsNumber() @Min(-90) @Max(90)
  lat!: number;
  @ApiProperty({ example: 106.660172 }) @Type(() => Number) @IsNumber() @Min(-180) @Max(180)
  lng!: number;

  @ApiProperty({ example: 1500, description: 'Radius in metres (50 - 10000)' })
  @Type(() => Number) @IsInt() @Min(50) @Max(10_000)
  radius!: number;

  @ApiProperty({ required: false, isArray: true })
  @IsOptional()
  @IsArray()
  @IsString({ each: true })
  @Transform(({ value }) =>
    typeof value === 'string' ? value.split(',').map((s) => s.trim()) : value,
  )
  categories?: string[];

  @ApiProperty({ required: false, default: 5 })
  @IsOptional() @Type(() => Number) @IsInt() @Min(1) @Max(50)
  limitPerCategory?: number;
}