/*
 * Media analyzers ported from the old arkham:comments-ui package
 * (lib/services/media-analyzers). Given a comment's text, detect an embeddable
 * image or YouTube URL and return { type, content }. First match wins.
 */

const imageAnalyzer = {
  name: 'image',
  getMediaFromContent(content) {
    if (content) {
      const urls = content.match(/(\S+\.[^/\s]+(\/\S+|\/|))(.jpg|.png|.gif)/g);
      if (urls && urls[0]) return urls[0];
    }
    return '';
  }
};

const youtubeAnalyzer = {
  name: 'youtube',
  getMediaFromContent(content) {
    const parts = (content || '').match(/(?:https?:\/\/)?(?:www\.youtube\.com|youtu\.?be)\/([\w=?]+)/);
    let mediaContent = '';
    if (parts && parts[1]) {
      let id = parts[1];
      if (id.indexOf('v=') > -1) {
        const subParts = id.match(/v=([\w]+)/);
        if (subParts && subParts[1]) id = subParts[1];
      }
      mediaContent = `https://www.youtube.com/embed/${id}`;
    }
    return mediaContent;
  }
};

const analyzers = [imageAnalyzer, youtubeAnalyzer];

// Returns { type, content } or {}.
export default function getMediaFromContent(content) {
  for (let i = 0; i < analyzers.length; i += 1) {
    const mediaContent = analyzers[i].getMediaFromContent(content);
    if (mediaContent) return { type: analyzers[i].name, content: mediaContent };
  }
  return {};
}