import { URL } from 'https://deno.land/std@0.85.0/node/url.ts';
import { extendType, string } from '../index.ts';

/**
 * Decodes a string into the `URL` type
 */
export const Url = extendType(string, {
  displayName: 'url',
  description: 'A valid URL',
  async from(str): Promise<URL> {
    const url = new URL(str);
    if (!url.protocol || !url.host) {
      throw new Error('Malformed URL');
    }

    if (!['http:', 'https:'].includes(url.protocol as string)) {
      throw new Error('Only allowed http and https URLs');
    }

    return url;
  },
});

/**
 * Decodes an http/https only URL
 */
export const HttpUrl = extendType(Url, {
  async from(url): Promise<URL> {
    if (!['http:', 'https:'].includes(url.protocol as string)) {
      throw new Error('Only allowed http and https URLs');
    }

    return url;
  },
});