import { IsBoolean, IsNumber, IsOptional, Max, Min } from "class-validator";

/**
 * Operator-set USD→ETB fallback. Bounded well outside any plausible published
 * rate but far short of a fat-fingered magnitude error — this value multiplies
 * real invoice amounts whenever CBE is unreachable.
 *
 * Both fields are optional so the two controls on the page move independently: flipping
 * the DJF toggle must not require re-submitting (and so re-stamping as MANUAL) a fallback
 * rate the operator did not touch.
 */
export class UpdateExchangeSettingDto {
  @IsOptional()
  @IsNumber({ maxDecimalPlaces: 6 })
  @Min(1)
  @Max(10_000)
  fallbackRate?: number;

  /** Whether Djiboutian Franc may be chosen as a billing currency. */
  @IsOptional()
  @IsBoolean()
  djfEnabled?: boolean;
}