var fs = require('fs-extra');
var uuid = require('uuid');
var path = require('path');
var cloudscraper = require('cloudscraper');
var readChunk = require('read-chunk');
var fileType = require('file-type');
var request = require('request');
var ytdl = require('ytdl-core');
var Readable = require('stream').Readable;
var cfg = require('../../cfg/main.json');

module.exports = (lib) => {
  lib.trigger.add({
    name: 'parser',
    call: /https?:\/\/[\w-]+(\.[\w-]+)+\.?(:\d+)?(\/\S*)?/gi,
    level: 0,
    active: 1,
    func: (e) => {
      if(e.channel.getName() == '#f0ck' || e.channel.getName() == '#kbot-dev') {
        if(!e.message.match(/\!ignore/)) {
          var tmp = e.message.match(/https?:\/\/[\w-]+(\.[\w-]+)+\.?(:\d+)?(\/\S*)?/gi); // get links
          tmp.forEach((entry,i,a) => {
            if(!entry.match(/f0ck\.me/i)) {
              getLink(entry, (cb) => {
                if(cb.success === true) {
                  fs.move(cb.file, cb.file + '.' + cb.info.ext, (err) => {
                    if(!err) {
                      lib.bot.whois(e.user.getNick(), e.network, (err, cbgu) => {
                        lib.sql.query("insert into `f0ck`.`items` (`src`,`dest`,`mime`,`size`,`checksum`,`username`,`userchannel`,`usernetwork`,`stamp`,`active`,`thumb`) values (?,?,?,?,?,?,?,?,?,?,?)", [
                          entry,
                          cb.file + '.' + cb.info.ext,
                          cb.info.mime,
                          cb.size,
                          cb.checksum,
                          cbgu['nick'],
                          e.channel.getName(),
                          e.network,
                          Math.floor(new Date() / 1000),
                          0,
                          (cb.info.thumb !== null)?cb.info.thumb:''
                        ]).on('result', (result) => {
                          lib.generateThumbs();
                          e.reply(cfg.url+"/"+result.insertId+" - "+cb.info.title+" ("+cb.info.mime+", ~"+lib.formatSize(cb.size)+") from "+cbgu['nick']+" ("+cbgu['username']+"@"+cbgu['hostname']+")");
                        }).on('error', (msg) => {
                          e.reply(msg);
                        });
                      });
                    }
                  });
                }
                else {
                  fs.stat('./b/' + cb.file, (err, stat) => {
                    if(err === null)
                      fs.unlinkSync('./b/' + cb.file);
                    if(cb.msg !== '')
                      e.reply(cb.msg);
                  });
                }
              });
            }
          });
        }
      }
    },
    desc: 'muh'
  });
  
  var getLink = (url, cb) => {
    var yt = /https?:\/\/(www\.)?youtu(\.be\/|be\.com\/)((.+\/)?(watch(\?v=|.+&v=))?(v=)?)([\w_-]{11})(&.+)?/gi;
    var sc = /https?:\/\/(www\.)?(soundcloud\.com|snd\.sc)(\/\S*)(\/\S*)/gi;
    lib.checkRepost(url, (cbcr) => {
      var tmpdest = uuid.v1().split('-')[0];
      if(cbcr === true) {
        var dat = fs.createWriteStream('./b/' + tmpdest);
        var info;
        
        if(url.match(yt)) { // ytdl
          ytdl.getInfo(url, (err, inf) => {
            if(!err) {
              var title = inf.title;
              var iurl = inf.iurl;
              try {
                ytdl.downloadFromInfo(inf, { filter: (format) => { return format.container === 'webm'; } })
                  .on('response', (res) => {
                    if(res.headers['content-length'] > cfg.maxFileSize) {
                      res.destroy();
                      dat.close();
                      cb({ success: false, file: tmpdest, msg: 'f0ck! your file is too big (~'+lib.formatSize(res.headers['content-length'])+'), max '+lib.formatSize(cfg.maxFileSize)+' allowed' });
                    }
                    else {
                      info = {
                        type: 'youtube',
                        title: title,
                        mime: 'video/webm',
                        ext: 'webm',
                        thumb: iurl
                      };
                    }
                  })
                  .on('error', (err) => {
                    dat.close();
                    cb({ success: false, file: tmpdest, msg: ex });
                  })
                  .pipe(dat);
              }
              catch(ex) {
                dat.close();
                cb({ success: false, file: tmpdest, msg: ex.message });
              }
            }
          });
        }
        else if(url.match(sc)) { // scdl
          request('https://api.soundcloud.com/resolve.json?client_id=' + cfg.scclientid + '&url=' + url, (err, res, body) => {
            if(!err && res.statusCode === 200) {
              var data = JSON.parse(body);
              request(data.stream_url + ((data.stream_url.indexOf('?') === -1)?'?':'&') + 'client_id=' + cfg.scclientid)
                .pipe(dat);
              info = {
                type: 'soundcloud',
                title: data.title,
                mime: 'audio/mpeg',
                ext: 'mp3',
                thumb: (data.artwork_url !== null)?data.artwork_url.replace('large.jpg', 't300x300.jpg'):null
              };
            }
            else {
              dat.close();
              cb({ success: false, file: tmpdest, msg: 'f0ck sc-api' });
            }
          });
        }
        else { // various
          cloudscraper.request({
            method: 'GET',
            url: url,
            encoding: null,
          },
          (err, res, data) => {
            if(!err) {
              var type = res.headers['content-type'];
              lib.log('MimeType: '+type);
              var length = res.headers['content-length'];
              if(cfg.allowedMimes.hasOwnProperty(type)) {
                if(data.length <= cfg.maxFileSize) {
                  var s = new Readable
                  s.push(data);
                  s.push(null);
                  s.pipe(dat);
                  info = {
                    type: 'other',
                    title: path.parse(url).base,
                    mime: type,
                    ext: cfg.allowedMimes[type],
                    thumb: null
                  };
                }
                else {
                  dat.close();
                  cb({ success: false, file: tmpdest, msg: 'f0ck! your file is too big (~'+lib.formatSize(data.length)+'), max '+lib.formatSize(cfg.maxFileSize)+' allowed' });
                }
              }
              else {
                dat.close();
                cb({ success: false, file: tmpdest, msg: '' });
              }
            }
            else {
              dat.close();
              cb({ success: false, file: tmpdest, msg: err });
            }
          });
        }
        
        dat
          .on('finish', () => {
            var size = dat.bytesWritten;
            dat.close();
            if(size > cfg.maxFileSize)
              cb({ success: false, file: tmpdest, msg: 'f0ck! your file is too big (~'+lib.formatSize(size)+'), max '+lib.formatSize(cfg.maxFileSize)+' allowed' });
            else {
              fs.stat('./b/' + cb.file, (err, stat) => {
                if(err === null) {
                  lib.getCheckSum('./b/' + tmpdest, (cbcs) => {
                    lib.checkRepostCheckSum(cbcs, (cbcrcs) => {
                      if(cbcrcs === true) {
                        var mime = fileType(readChunk.sync('./b/' + tmpdest, 0, 262));
                        if(cfg.allowedMimes.hasOwnProperty(mime.mime) || info.type === 'soundcloud')
                          cb({ success: true, info: info, size: size, file: './b/' + tmpdest, checksum: cbcs });
                        else
                          cb({ success: false, file: tmpdest, msg: 'lol, go f0ck yourself ('+mime+')' });
                      }
                      else
                        cb({ success: false, file: tmpdest, msg: 'repost motherf0cker: '+cfg.url+'/'+cbcrcs });
                    });
                  });
                }
              });
            }
          })
          .on('error', (err) => {
            cb({ success: false, file: tmpdest, msg: err });
          });
      }
      else
        cb({ success: false, file: tmpdest, msg: 'repost motherf0cker: '+cfg.url+'/'+cbcr });
    });
  };
};