import { Snippet, zSnippetTypes } from '../services/SnippetService';

/**
 * Format the snippet link based on the snippet type
 */
const link = (snippet: Snippet, utms?: string[]): string => {
  const url = (() => {
    if (snippet.type === zSnippetTypes.Enum.YouTube) {
      return `${snippet.url}&t=${Math.round(snippet.startSeconds || 1) - 1}s`;
    }

    if (snippet.type === zSnippetTypes.Enum.File) {
      return `${snippet.url}?pageNumber=${snippet.pageNumber}`;
    }
    return snippet.url;
  })();

  return addUTMs(url, utms);
};

/**
 * Add UTM parameters to a link
 */
const addUTMs = (url: string, utms?: string[]): string => {
  if (!utms || !utms.length) return url;
  const parsed = new URL(url);
  const params = utms.map((utm) => {
    const parts = utm.split('=');
    return {
      key: parts[0],
      value: parts[1],
    };
  });
  params.forEach(({ key, value }) => {
    if (!key || !value) return;
    parsed.searchParams.set(key, value);
  });

  return String(parsed);
};

const SnippetEdgeUtil = {
  link,
  addUTMs,
};

export default SnippetEdgeUtil;