var socket = io.connect();

socket.on('connect', function () {
  $('#chat').addClass('connected');
});
 
socket.on('announcement', function (msg) {
  $('#lines').append($('<p>').append($('<em>').text(msg)));
});
 
socket.on('nicknames', function (nicknames) {
  $('#nicknames').empty().append($('<span>Online: </span>'));
  for (var i in nicknames) {
    $('#nicknames').append($('<b>').text(nicknames[i]+" : "));
  }
});

socket.on('user message', message);
 
socket.on('reconnect', function () {
  $('#lines').remove();
  message('System', 'Reconnected to the server');
});
 
socket.on('reconnecting', function () {
  message('System', 'Attempting to re-connect to the server');
});
 
socket.on('error', function (e) {
  message('System', e ? e : 'A unknown error occurred');
});


function message (from, msg) {
  $('#lines').prepend($('<p>').prepend($('<b>').text(from), msg));
  $('#announ').text(msg);
}



// dom manipulation
$(function () {
  $('#set-nickname').submit(function (ev) {
    socket.emit('nickname', $('#nick').val(), function (set) {
      if (!set) {
        clear();
        return $('#chat').addClass('nickname-set');
      }
      $('#nickname-err').css('visibility', 'visible');
    });
    return false;
  });
 
  $('#send-message').submit(function () {
    message('me ', $('#message').val());
    socket.emit('user message', $('#message').val());
    clear();
    $('#lines').get(0).scrollTop = 10000000;
    return false;
  });

 
  function clear () {
    $('#message').val('').focus();
  };
});