import type { DuffelCardFormStrings } from '../../../index';
import type { ValidationResult } from './validateFieldFn';

export function validateCVCFn(
  customStrings: Pick<
    DuffelCardFormStrings,
    | 'cvvRequiredMessage'
    | 'cvvOnlyNumberMessage'
    | 'cvvMinLengthMessage'
    | 'cvvMaxLengthMessage'
  >
) {
  return (value: string): ValidationResult => {
    if (value === '') {
      return { valid: false, error: customStrings.cvvRequiredMessage };
    } else if (isNaN(parseInt(value, 10))) {
      return { valid: false, error: customStrings.cvvOnlyNumberMessage };
    } else if (value.length < 3) {
      return { valid: false, error: customStrings.cvvMinLengthMessage };
    } else if (value.length > 4) {
      return { valid: false, error: customStrings.cvvMaxLengthMessage };
    } else {
      return { valid: true, error: null };
    }
  };
}