import { ValidationOptions } from "../ValidationOptions";
import { buildMessage, ValidateBy } from "../common/ValidateBy";

export const MIN = "min";

/**
 * Checks if the first number is greater than or equal to the second.
 */
export function min(num: unknown, min: number): boolean {
    return typeof num === "number" && typeof min === "number" && num >= min;
}

/**
 * Checks if the first number is greater than or equal to the second.
 */
export function Min(minValue: number, validationOptions?: ValidationOptions): PropertyDecorator {
    return ValidateBy(
        {
            name: MIN,
            constraints: [minValue],
            validator: {
                validate: (value, args): boolean => min(value, args.constraints[0]),
                defaultMessage: buildMessage(
                    (eachPrefix) => eachPrefix + "$property must not be less than $constraint1",
                    validationOptions
                )
            }
        },
        validationOptions
    );
}