/*
    SkeptCOM [RSS-Youtube] | Détecte les nouvelles vidéos YT via RSS
*/


    // REQUIRE, CONST, VARIABLES
const jsonfile = require('jsonfile')
const Parser = require('rss-parser')
const path = require('path')

const routage = require('../modules/routage')('rss-skeptikon')
let parser = new Parser({
  headers: {
    Accept: 'application/rss+xml, application/xml',
  }
})
const db = require('../db/rss-skeptikon.json')

    // FUNCTIONS
  // et on output ! YOLO !
function output(data) {
  console.log(` --> [RSS-Skeptikon | NV] ${data.author} | ${data.title}`)
  if (routage && routage.send) routage.send(data)
}

  // bon, on a besoin de recup le RSS, normol
async function getFeed(url) {
  return new Promise((resolve, reject) => {
    parser.parseURL(url, (err, res) => {
      if (err) return reject(err)
      resolve(res)
    })
  })
}

  // on filtre un peu, puis en fonction on output
async function parseRSS(feed) {

  for (let n in feed.items) {
    let i = feed.items.length-n-1 // on check en décroissant
    if (feed.items[i].isoDate > db.lastCheck || feed.items[i].isoDate > db.latest) {
      db.latest = feed.items[i].isoDate
      let id = feed.items[i].link.split('/')[feed.items[i].link.split('/').length-1]
      let c = {
        author: feed.items[i].creator,
        title: feed.items[i].title,
        url: feed.items[i].link,
        id: id,
        image: "https://skeptikon.fr/static/previews/" + id + ".jpg",
        desc: feed.items[i].content.slice(0, db.config.sliceDescription) + " [...]",
        isoDate: feed.items[i].isoDate
      }
      output(c)
    }
  }
}

  // on check l'ensemble de feeds
async function checkFeeds(feeds) {
  console.log(` --- [RSS-Skeptikon] check @${db.lastCheck}`)
  routage.log(`check @${db.lastCheck}`)

  let feed = await getFeed(feeds)
  await parseRSS(feed)

  let dateObj = new Date()
  db.lastCheck = dateObj.toISOString()

    // et on externalise la nouvelle date. Youpi !
  jsonfile.writeFile(path.resolve('./db/rss-skeptikon.json'), db, {spaces: 2}, (err) => {
    if (err) console.error(err)
  })

}


function rssLoop(time) {
  checkFeeds(db.config.urlFeeds)
  setTimeout(() => {
    rssLoop(time)
  }, time)
}

    // INIT
console.log(` --- [RSS-Skeptikon] Load`)
routage.log(`Load`)
rssLoop(db.config.timeLoop*60*1000)