import { IsEnum, IsNumber, IsPositive, IsOptional, IsString } from 'class-validator';
import { ApiProperty, ApiPropertyOptional } from '@nestjs/swagger';
import { Type } from 'class-transformer';
import { Currency } from '@prisma/client';

export class UpsertExchangeRateDto {
  @ApiProperty({ enum: Currency, example: 'ETB' }) @IsEnum(Currency) fromCurrency: Currency;
  @ApiProperty({ enum: Currency, example: 'DJF' }) @IsEnum(Currency) toCurrency: Currency;
  @ApiProperty({ example: 3.25 }) @Type(() => Number) @IsNumber() @IsPositive() rate: number;
  @ApiPropertyOptional({ example: 'MANUAL', description: 'Source label e.g. MANUAL, EXTERNAL_API' })
  @IsOptional() @IsString() source?: string;
}