var events = require('events');
var gamedig = require('gamedig');
var slug = require('slug');
var spawn = require('child_process').spawn;

var ArmaServer = require('arma-server');

var queryInterval = 5000;

var Server = function (path, type, options) {
  this.path = path;
  this.type = type;
  this.update(options);
};

Server.prototype = new events.EventEmitter();

Server.prototype.update = function (options) {
  this.admin_password = options.admin_password;
  this.battle_eye = options.battle_eye;
  this.max_players = options.max_players;
  this.mods = options.mods || [];
  this.password = options.password;
  this.persistent = options.persistent;
  this.port = options.port || 2302;
  this.title = options.title;
  this.von = options.von;

  this.id = slug(this.title).replace('.', '-');
  this.port = parseInt(this.port, 10); // If port is a string then gamedig fails
};

Server.prototype.queryStatus = function() {
  var self = this;
  Gamedig.query(
  {
    type: 'arma3',
    host: '127.0.0.1',
    port: self.port,
  },
  function(state) {
    if(state.error) {
      self.state = null;
    } else {
      self.state = state;
    }

    self.emit('state');
  }
);
};

Server.prototype.start = function() {
  var server = new ArmaServer({
    battleEye: this.battle_eye ? 1 : 0,
    config: this.id,
    disableVoN: this.von ? 0 : 1,
    hostname: this.title,
    mods: this.mods,
    password: this.password,
    passwordAdmin: this.admin_password,
    path: this.path,
    persistent: this.persistent ? 1 : 0,
    platform: this.type,
    players: this.max_players,
    port: this.port,
  });
  server.writeServerConfig();
  var instance = server.start();
  var self = this;

  instance.stdout.on('data', function (data) {
    console.log('stdout: ' + data);
  });

  instance.stderr.on('data', function (data) {
    console.log('stderr: ' + data);
  });

  instance.on('close', function (code) {
    console.log('child process exited with code ' + code);
    clearInterval(self.queryStatusInterval);
    self.state = null;
    self.pid = null;
    self.instance = null;

    self.emit('state');
  });

  this.pid = instance.pid;
  this.instance = instance;
  this.queryStatusInterval = setInterval(function () {
    self.queryStatus();
  }, queryInterval);

  this.emit('state');

  return this;
};

Server.prototype.stop = function(cb) {
  var handled = false;
  var self = this;

  this.instance.on('close', function (code) {
    if (!handled) {
      handled = true;

      if (cb) {
        cb();
      }
    }
  });

  this.instance.kill();

  setTimeout(function() {
    if (!handled) {
      handled = true;

      if (cb) {
        cb();
      }
    }
  }, 5000);

  return this;
};

Server.prototype.toJSON = function () {
  return {
    admin_password: this.admin_password,
    battle_eye: this.battle_eye,
    id: this.id,
    max_players: this.max_players,
    mods: this.mods,
    password: this.password,
    persistent: this.persistent,
    pid: this.pid,
    port: this.port,
    state: this.state,
    title: this.title,
    von: this.von,
  };
};

module.exports = Server;