"use strict";
const request = require('request')
const fs = require('fs')
const Level = require('../classes/Level.js')

module.exports = async (app, req, res, api, analyze) => {

  function rejectLevel() {
    return !api ? res.redirect('search/' + req.params.id) : res.sendError()
  }

  if (req.offline) return rejectLevel()

  let levelID = req.params.id
  if (levelID == "daily" || levelID == "weekly") return app.run.download(app, req, res, api, levelID, analyze)
  else if (/\D/.test(levelID)) return rejectLevel()

  if (analyze || req.query.hasOwnProperty("download")) return app.run.download(app, req, res, api, levelID, analyze)

  req.gdRequest('getGJLevels21', { str: levelID, type: 0 }, function (err, resp, body) {

    if (err || body.startsWith("##")) return rejectLevel()

    // "revolutionary name XD" @Rudxain
    const bodySplit = body.split('#')
    let preRes = bodySplit[0].split('|', 10)
    let author = bodySplit[1].split('|', 1)[0].split(':')
    let song = '~' + bodySplit[2]
    song = app.parseResponse(song, '~|~')

    let levelInfo = app.parseResponse(preRes.find(x => x.startsWith(`1:${levelID}`)) || preRes[0])
    let level = new Level(levelInfo, req.server, false, author).getSongInfo(song)
    if (!level.id) return rejectLevel()

    if (req.isGDPS) level.gdps = (req.onePointNine ? "1.9/" : "") + req.server.id
    if (level.author != "-") app.userCache(req.id, level.accountID, level.playerID, level.author)

    function sendLevel() {

      if (api) return res.send(level)

      else return fs.readFile('./html/level.html', 'utf8', function (err, data) {
        let html = data
        let filteredSong = level.songName.replace(/[^ -~]/g, "")  // strip off unsupported characters
        level.songName = filteredSong || level.songName
        let variables = Object.keys(level)
        variables.forEach(x => {
          let regex = new RegExp(`\\[\\[${x.toUpperCase()}\\]\\]`, "g")
          html = html.replace(regex, app.clean(level[x]))
        })
        if (req.server.downloadsDisabled) html = html.replace('id="additional" class="', 'id="additional" class="downloadDisabled ')
          .replace('analyzeBtn"', 'analyzeBtn" style="filter: opacity(30%)"')
        return res.send(html)
      })
    }

    if (req.server.demonList && level.difficulty == "Extreme Demon") {
      request.get(req.server.demonList + 'api/v2/demons/?name=' + level.name.trim(), function (err, resp, demonList) {
          if (err) return sendLevel()
          let demon = JSON.parse(demonList)
          if (demon[0] && demon[0].position) level.demonList = demon[0].position
          return sendLevel()
      })
  }

    else return sendLevel()

  })
}