import { isString } from '@rawmodel/utils/dist/helpers/is-string';
import { isUndefined } from '@rawmodel/utils/dist/helpers/is-undefined';
import { isNull } from '@rawmodel/utils/dist/helpers/is-null';

const V1_REGEX = /^[0-9a-f]{8}-[0-9a-f]{4}-[1][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
const V2_REGEX = /^[0-9a-f]{8}-[0-9a-f]{4}-[2][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
const V3_REGEX = /^[0-9a-f]{8}-[0-9a-f]{4}-[3][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
const V4_REGEX = /^[0-9a-f]{8}-[0-9a-f]{4}-[4][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
const V5_REGEX = /^[0-9a-f]{8}-[0-9a-f]{4}-[5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;

/**
 * Returns a function for detecting UUID values.
 */
export function uuidValidator(recipe: {
  version?: number;
} = {}) {
  return (value?: any) => {

    if (isUndefined(value) || isNull(value)) {
      return true;
    }
    else if (!isString(value)) {
      return false;
    }

    const { version } = recipe;
    switch (version) {
      case 1:
        return V1_REGEX.test(value);
      case 2:
        return V2_REGEX.test(value);
      case 3:
        return V3_REGEX.test(value);
      case 4:
        return V4_REGEX.test(value);
      case 5:
        return V5_REGEX.test(value);
    }

    return (
      V1_REGEX.test(value)
      || V2_REGEX.test(value)
      || V3_REGEX.test(value)
      || V4_REGEX.test(value)
      || V5_REGEX.test(value)
    );
  };
}