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

const PODCAST_CDN_ROOT="https://podcast.rpg.cdn.ascorrea.com"

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: data.title,
      description: data.description,
      feedUrl: `${data.site.url}${data.page.filePathStem}.xml`,
      siteUrl: data.site.url,
      imageUrl: 'http://example.com/icon.png',
      author: data.author || `${data.site.author.name}`,
      copyright: data.copyright || `${new Date().getFullYear()} ${data.site.author.name}`,
      language: 'en',
      categories: data.categories,
      pubDate: data.page.date,
      ttl: 60,
      itunesAuthor: data.itunes?.author || `${data.site.author.name}`,
      itunesSubtitle: data.itunes?.subtitle || '',
      itunesSummary: data.itunes?.summary || '',
      itunesOwner: { 
        name: data.itunes?.owner?.name || `${data.site.author.name}`,
        email: data.itunes?.owner?.email ||`${data.site.author.email}` 
      },
      itunesExplicit: data.itunes?.explicit || false,
      itunesCategory: [],
      itunesImage: data.itunes?.image || 'http://example.com/image.png'
    });

    const episodes = data.collections.episode.filter(episode=>episode.data.podcast==true)
    const items = data.tags ? episodes.filter(episode=>data.tags.every(tag=>episode.data.tags.includes(tag))) : episodes
  
    items.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}: ${episode_data.title}`,
        description: episode.content,
        url: episode.url, // link to the item
        guid: episode.url, // optional - defaults to url
        date: episode_data.date, // any format that js Date can parse.
        // enclosure : {url:`${data.site.url}/episodes/s${zero_pad_season}/s${zero_pad_season}e${episode_data.episode}.mp3`}, // optional enclosure
        enclosure : {url:`${PODCAST_CDN_ROOT}/s${zero_pad_season}e${episode_data.episode}.mp3`}, // optional enclosure
        // itunesDuration: duration,
      });
    })
   
  
    // cache the xml to send to clients
    const xml = feed.buildXml();
    return xml
	}
}

module.exports = PodcastFeed