const { Podcast } = require('podcast');
const music_metadata = require('music-metadata');
const fs = require('fs');

async function getMp3Duration(filePath) {
  try {
      const metadata = await music_metadata.parseFile(filePath);
      console.log('Duration:', metadata.format.duration, 'seconds');
      return metadata.format.duration; // Duration in seconds
  } catch (error) {
      console.error('Error reading file:', error.message);
      return null;
  }
}

class PodcastFeed {
  data() {
		return {
			// Writes to "/my-permalink/hello/index.html"
			permalink: (data) => `${data.page.filePathStem}.xml`,
		};
	}

  async render(data) {
		const feed = new Podcast({
      title: 'title',
      description: 'description',
      feedUrl: `${data.site.url}${data.page.filePathStem}.xml`,
      siteUrl: data.site.url,
      imageUrl: 'http://example.com/icon.png',
      author: `${data.site.author.name}`,
      copyright: '2013 Dylan Greene',
      language: 'en',
      categories: ['Category 1','Category 2','Category 3'],
      pubDate: 'May 20, 2012 04:00:00 GMT',
      ttl: 60,
      itunesAuthor: `${data.site.author.name}`,
      itunesSubtitle: 'I am a sub title',
      itunesSummary: 'I am a summary',
      itunesOwner: { name: `${data.site.author.name}`, email: `${data.site.author.email}` },
      itunesExplicit: false,
      itunesCategory: [{
          text: 'Entertainment',
          subcats: [{
            text: 'Television'
          }]
      }],
      itunesImage: 'http://example.com/image.png'
    });
  
    data.collections.episode.forEach(episode=>{
      const episode_data = episode.data
      const zero_pad_season = episode_data.season.toString().padStart(2, '0')
      // const duration = getMp3Duration(`../episodes/s${zero_pad_season}/s${zero_pad_season}e${episode_data.episode}.mp3`)
       /* loop over data and add to feed */
      feed.addItem({
        title:  `S${zero_pad_season}E${episode_data.episode}: ${episode_data.title}`,
        description: episode.content,
        url: episode.url, // link to the item
        guid: episode.url, // optional - defaults to url
        categories: episode_data.categories,
        author: data.site.author.name, 
        date: episode_data.date, // any format that js Date can parse.
        // enclosure : {url:`${data.site.url}/episodes/s${zero_pad_season}/s${zero_pad_season}e${episode_data.episode}.mp3`}, // optional enclosure
        enclosure : {url:`https://cdn.localhost/podcast/s${zero_pad_season}e${episode_data.episode}.mp3`}, // optional enclosure
        itunesAuthor: data.site.author,
        itunesExplicit: episode_data.itunesExplicit,
        // itunesDuration: duration,
      });
    })
   
  
    // cache the xml to send to clients
    const xml = feed.buildXml();
    return xml
	}
}

module.exports = PodcastFeed