var fs = require('fs-extra');
var http = require('http');
var https = require('https');
var exec = require('child_process').exec;
var probe = require('node-ffprobe');
var crypto = require('crypto');
var Mime = require('mime');

var bot, sql, cfg, debug;

module.exports = Lib;
function Lib(tbot, tsql, tcfg) {
  this.bot = bot = tbot;
  this.sql = sql = tsql;
  this.cfg = cfg = tcfg;
  this.debug = debug = true;
  this.admins = [];
}

Lib.prototype.getUser = (e, cbgu) => {
  var u = e.user.getNick();
  var n = e.network;
  if(!e.user.hasOwnProperty('hostname')) {
    setTimeout(()=>{
      bot.write('WHOIS '+u, n, () => {
        bot.once('data', (err, msg) => {
          var params;
          var map = [];
          map.push(u);
          if(msg.command == 'RPL_WHOISUSER') {
            params = msg.params.split(' ');
            map[u] = map[u] || {};
            map[u].nick = u;
            map[u].username = params[2];
            map[u].hostname = params[3];
            map[u].realname = msg.trailing;
          }
          if(typeof(map[u]) === 'object')
            cbgu(map[u]);
        });
      });
    }, 100);
  }
  else {
    cbgu({
      nick: e.user.nick,
      username: e.user.username,
      hostname: e.user.hostname,
      realname: e.user.realname
    });
  }
};
Lib.prototype.getUserlevel = (e, cb) => {
  Lib.prototype.getUser(e, (cbgu) => {
    var host = cbgu.username+'@'+cbgu.hostname;
    var lvl_channel = (cbgu.nick in e.channel.names)? cfg.level[ e.channel.names[cbgu.nick] ] : 0;
    var lvl_db = 0;
    if(host in this.admins)
      lvl_db = (this.admins[host].server == e.network)? this.admins[host].level : 0;
    cb({
      'channel': lvl_channel,
      'db': lvl_db,
      'level': Math.max(lvl_channel, lvl_db)
    });
  });
};
Lib.prototype.loadUser = (cb) => {
  this.admins = [];
  sql.query("select * from `f0ck`.`user`", (err, rows, fields) => {
    rows.forEach((e,i,a) => {
      this.admins.push(e.nick);
      this.admins[e.vhost] = {
        'id': e.id,
        'nick': e.nick,
        'vhost': e.vhost,
        'level': e.level,
        'server': e.server
      };
    });
    cb(true);
  }).on('error', () => {
    cb(false);
  });
}
Lib.prototype.checkRepost = (url, cbcr) => {
  sql.query("select count(*) as count from `f0ck`.`items` where `src` = ?", url, (err, rows, fields) => {
    cbcr((rows[0].count == 0)?true:false);
  });
};
Lib.prototype.checkRepostCheckSum = (cs, cbcrcs) => {
  sql.query("select count(*) as count from `f0ck`.`items` where `checksum` = ?", cs, (err, rows, fields) => {
    cbcrcs((rows[0].count == 0)?true:false);
  });
};
Lib.prototype.formatSize = (size) => {
  var i = Math.floor(Math.log(size) / Math.log(1024));
  return (size / Math.pow(1024, i)).toFixed(2) * 1 + ' ' + ['B', 'kB', 'MB', 'GB', 'TB'][i];
};
Lib.prototype.getCheckSum = (file, cbcs) => {
  var sha256sum = crypto.createHash('sha256');
  var s = fs.ReadStream(file);
  s.on('data', (d) => {
    sha256sum.update(d);
  });
  s.on('end', () => {
    cbcs(sha256sum.digest('hex'));
  });
};
Lib.prototype.dl = (url, dest, cb) => {
  var request = (url.match(/^https/)?https:http).get(url, (response) => { // type:1=post,type:2=stfu
    console.log(response.headers['content-type']);
    if(cfg.allowedMimes.hasOwnProperty(response.headers['content-type'])) {
      if(response.headers['content-length'] <= cfg.maxFileSize) {
        Lib.prototype.checkRepost(url, (cbcr) => {
          if(cbcr) {
            var file = fs.createWriteStream(dest+"."+cfg.allowedMimes[response.headers['content-type']]);
            response.pipe(file);
            file.on('finish', () => {
              file.close();
              var mime = Mime.lookup(dest+"."+cfg.allowedMimes[response.headers['content-type']]);
              if(cfg.allowedMimes.hasOwnProperty(mime)) {
                probe(dest+"."+cfg.allowedMimes[response.headers['content-type']], (err, probeData) => {
                  if(probeData.streams[0].height !== undefined || probeData.streams[0].width !== undefined) {
                    if(probeData.streams[0].height + probeData.streams[0].width <= cfg.minRes)
                      cb({'status':false, 'msg':'f0ck! your shitpost is too small', 'type':1});
                    else
                      cb({'status':true, 'msg':'downloaded '+dest, 'type':1, 'infos':{'mime':response.headers['content-type'], 'size':response.headers['content-length'], 'ext':cfg.allowedMimes[response.headers['content-type']]}});
                  }
                  else
                    cb({'status':true, 'msg':'downloaded '+dest, 'type':1, 'infos':{'mime':response.headers['content-type'], 'size':response.headers['content-length'], 'ext':cfg.allowedMimes[response.headers['content-type']]}});
                });
              }
              else
                cb({'status':false, 'msg':'lol, go f0ck yourself', 'type':1});
            });
            file.on('error', (err) => {
              fs.unlink(dest+"."+cfg.allowedMimes[response.headers['content-type']]);
              file.close();
              cb({'status':false, 'msg':err.message, 'type':1});
            });
          }
          else
            cb({'status':false, 'msg':'repost motherf0cker', 'type':1});
        });
      }
      else
        cb({'status':false, 'msg':'f0ck! your file is too big (~'+formatSize(response.headers['content-length'])+'), max '+formatSize(cfg.maxFileSize)+' allowed', 'type':1});
    }
    else
      cb({'status':false, 'msg':'f0ck you', 'type':2});
  }).on('error', (msg) => {
    cb({'status':false, 'msg':msg, 'type':2});
  });
};
Lib.prototype.generateThumbs = () => {
  var outdir = './t/';
  sql.query("select * from `f0ck`.`items`", (err, rows, fields) => {
    rows.forEach((e,i,a) => {
      var thumbnail = outdir+e.id+'.png';
      if(!fs.existsSync(thumbnail)) {
        exec('ffmpegthumbnailer -i'+e.dest+' -s1024 -o'+thumbnail, (error) => {
          if(error) {
            Lib.prototype.log('failed thumbnail for '+e.id+' ('+e.mime+') 1');
            fs.copySync('./s/mp3.png', thumbnail); // copy standardthumbnail
          }
          else {
            exec('convert '+thumbnail+' -resize "128x128^" -gravity center -crop 128x128+0+0 +repage '+thumbnail, (error) => {
              if(error)
                Lib.prototype.log('failed thumbnail for '+e.id+' ('+e.mime+') 2');
              else
                Lib.prototype.log("generated thumbnail for "+e.id+" ("+e.mime+")");
            });
          }
        });
      }
    });
  });
};
Lib.prototype.log = (msg) => {
  if(debug)
    bot.send("#f0ck", msg, 'n0xy');
};
Lib.prototype.toggleDebug = () => {
  if(debug) {
    debug = false;
    return 'debugmode deactivated';
  }
  else {
    debug = true;
    return 'debugmode activated';
  }
};