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

var bot, sql;

Lib.prototype.admins = [];
Lib.prototype.debug = false;
Lib.prototype.trigger = {
  trigger: [],
  add: (args) => {
    Lib.prototype.trigger.trigger.push({
      name: args.name,
      call: args.call,
      func: args.func,
      desc: args.desc,
      level: args.level,
      active: args.active
    });
  }
};

module.exports = Lib;
function Lib(tbot, tsql) {
  this.bot = bot = tbot;
  Lib.prototype.sql = tsql;
  Lib.prototype.cfg = require('../cfg/main.json');
  
  Lib.prototype.debug = Lib.prototype.cfg.debug;
  
  Lib.prototype.loadUser((cb) => {
    console.log((cb)?"Admins wurden geladen":"Admins konnten nicht geladen werden");
  });
  Lib.prototype.loadTrigger();
}



Lib.prototype.getUserlevel = (user, network, channel, cb) => {
  bot.whois(user, network, (err, data) => {
    var host = data.username+'@'+data.hostname;
    bot.names(channel, network, (names) => {
      var lvl_channel = (data.nick in names)? Lib.prototype.cfg.level[ names[data.nick] ] : 0;
      var lvl_db = 0;
      if(host in Lib.prototype.admins)
        lvl_db = (Lib.prototype.admins[host].server == network)? Lib.prototype.admins[host].level : 0;
      cb({
        'channel': lvl_channel,
        'db': lvl_db,
        'level': Math.max(lvl_channel, lvl_db)
      });
    });
  });
};
Lib.prototype.loadUser = (cb) => {
  Lib.prototype.admins = [];
  Lib.prototype.sql.query("select * from `f0ck`.`user`", (err, rows, fields) => {
    rows.forEach(e => {
      Lib.prototype.admins.push(e.vhost);
      Lib.prototype.admins[e.vhost] = {
        'id': e.id,
        'nick': e.nick,
        'vhost': e.vhost,
        'level': e.level,
        'server': e.server
      };
    });
    if(cb) cb(true);
  }).on('error', () => {
    if(cb) cb(false);
  });
}
Lib.prototype.checkRepost = (url, cbcr) => {
  Lib.prototype.sql.query("select count(id) as count, id from `f0ck`.`items` where `src` = ?", url, (err, rows, fields) => {
    cbcr((rows[0].count == 0)?true:rows[0].id);
  });
};
Lib.prototype.checkRepostCheckSum = (cs, cbcrcs) => {
  Lib.prototype.sql.query("select count(id) as count, id from `f0ck`.`items` where `checksum` = ?", cs, (err, rows, fields) => {
    cbcrcs((rows[0].count == 0)?true:rows[0].id);
  });
};
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.generateThumbs = () => {
  var outdir = './t';
  Lib.prototype.sql.query("select * from `f0ck`.`items`", (err, rows, fields) => {
    rows.forEach((e,i,a) => {
      var thumbnail = outdir+'/'+e.id+'.png';
      if(!fs.existsSync(thumbnail)) {
        var cmd;
        switch(e.mime) {
          case "video/mp4":
          case "video/webm":
          case "audio/mpeg":
          case "audio/ogg":
          case "image/gif":
            cmd = 'ffmpeg -ss 2 -i '+e.dest+' -vframes 1 -filter "scale=-1:256,crop=128:128" '+thumbnail;
            break;
          case "image/png":
          case "image/jpeg":
            cmd = 'convert '+e.dest+' -resize "200x200^" -gravity center -crop 128x128+0+0 +repage '+thumbnail;
            break;
        }
        exec(cmd, (error) => {
          if(error) {
            Lib.prototype.log('failed thumbnail for '+e.id+' ('+e.mime+') '+JSON.stringify(error));
            fs.copySync('./s/mp3.png', thumbnail); // copy standardthumbnail
          }
          else
            Lib.prototype.log("generated thumbnail for "+e.id+" ("+e.mime+")");
        });
      }
    });
  });
};
Lib.prototype.log = (msg) => {
  if(Lib.prototype.debug)
    bot.send(Lib.prototype.cfg.debugchannel, msg, 'n0xy');
};
Lib.prototype.loadTrigger = () => {
  var files = fs.readdirSync(__dirname+'/trigger/');
  files.forEach((file) => {
    if(file.substr(-3, 3) === '.js') {
      console.log('Loading trigger', file);
      require(__dirname+'/trigger/' + file)(bot, Lib.prototype);
    }
  });
};