var socket;

function sendChatMessage(userId, message)
{
    if (socket)
    {
        console.log("send message: " + message);
        socket.emit('im', { userId: userId, message: message });
    }
}

function chatMessageCallback(msg)
{
    console.log( "recv message: " + msg.message);
}

function chatEchoCallback(msg)
{
    console.log( "echo message: " + msg.message);
}

function chatNotDeliveredCallback(msg)
{
    console.log( "message not delivered");
}

var messageCount = 0;
function doChatTest()
{
    messageCount++;
    sendChatMessage(pofProfileId, "test message " + messageCount);
    setTimeout("doChatTest()", 10000);
}

function connectToChatServer()
{
    console.log("Connecting to chat server " + chatServer);

    socket = io.connect(chatServer + "?userId=" + escape(pofProfileId), { port: chatPort, 'force new connection':true });
    socket.on('connecting', function (transport)
    {
        console.log("Connecting to chat server via " + transport);
    });
    socket.on('connect', function ()
    {
        console.log("Connected to chat server");
        doChatTest();
    });
    socket.on('im', chatMessageCallback);
    socket.on('echo', chatEchoCallback);
    socket.on('notdelivered', chatNotDeliveredCallback);
    socket.on('ping', function (msg)
    {
        socket.emit('ping', msg);
    });
    socket.on('disconnect', function ()
    {
        console.log("Lost connection to chat server");
        socket = null;
    });
    socket.on('close', function ()
    {
        console.log("Lost connection to chat server");
        socket = null;
    });
    socket.on('error', function (reason)
    {
        console.log("Error connecting to chat server");
        socket = null;
    });
    socket.on('connect_failed', function (reason)
    {
        console.log("Error connecting to chat server");
        socket = null;
    });
}

function initChat()
{
    if (pofProfileId && pofProfileId != "")
        connectToChatServer();
    else
        console.log("Chat profile ID not specified, cannot init chat");
}