import { CreateURLOptions, ParsedURL } from './Linking.types';

export function createURL(path: string, { queryParams = {} }: CreateURLOptions = {}): string {
  if (typeof window === 'undefined') return '';
  const url = new URL(path, window.location.origin);
  Object.entries(queryParams).forEach(([key, value]) => {
    if (typeof value === 'string') {
      url.searchParams.set(key, encodeURIComponent(value));
    } else if (value != null) {
      url.searchParams.set(
        key,
        // @ts-expect-error: browser supports using array
        value
      );
    }
  });
  return url.toString().replace(/\/$/, '');
}

export function parse(url: string): ParsedURL {
  let parsed: URL;
  try {
    parsed = new URL(url);
  } catch {
    if (typeof window === 'undefined') {
      return {
        hostname: null,
        path: url,
        queryParams: {},
        scheme: null,
      };
    }
    return {
      hostname: 'localhost',
      path: url,
      queryParams: {},
      scheme: 'http',
    };
  }
  const queryParams: Record<string, string> = {};
  parsed.searchParams.forEach((value, key) => {
    queryParams[key] = decodeURIComponent(value);
  });
  return {
    hostname: parsed.hostname || null,
    // TODO: We should probably update native to follow the default URL behavior closer.
    path:
      !parsed.hostname && !parsed.pathname
        ? null
        : parsed.pathname === ''
          ? null
          : parsed.pathname.replace(/^\//, ''),
    queryParams,
    scheme: parsed.protocol.replace(/:$/, ''),
  };
}