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) {
    $('#lines').append($('<p>').append($('<b>').text(from), 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();
    };
});