var chatinit = function() {

    var pvuis;
     
     var audio = new Audio('/sounds/bell.mp3');

     function addULI(uname, cxids)
     {
        $('<li class="user"><button><img src="/Avatars/' + uname + '.xs.png"> ' + uname + '</button></li>')
            .data("name", uname)
            .data("cxids", cxids)
            .css('cursor', 'pointer')
            .click(function () { setPrivate(this); })
            .appendTo('#userlist')
     }

     function getUsers() {
                $('#userlist').empty();
                $('#to').empty();
                $.get("/api/chat/users").done(
                    function (users) {
                        $.each(users, function () {
                            var user = this;
                            var existent = $('#userlist li').filterByData("name", user.UserName);
                            if (existent.length > 0) existent.remove();
                            var cxids = [];
                            $.each(user.Connections, function () {
                                cxids.push(this.ConnectionId);
                            });
                            addULI(user.UserName,cxids)
                        });
                    }
                );
            };

     function onCx() {
        setTimeout(function () {
             getUsers();
        },120),
         $('#targets').removeClass('disabled')
     };
     function onDisCx () {
         $('#targets').addClass('disabled');
     };
        // This optional function html-encodes messages for display in the page.
     function htmlEncode(value) {
            var encodedValue = $('<div />').text(value).html();
            return encodedValue;
        }

     var setPrivate = function (li) {
                $("#sendmessagebox").addClass("hidden");
                $("#sendpvbox").removeClass("hidden");
                pvuis = { CXs: $(li).data("cxids"), UserName: $(li).data("name") };
                $('#sendpvdest').html(pvuis.UserName)
                $('#pv').focus();
            }
            var setPublic = function () {
                $("#sendmessagebox").removeClass("hidden");
                $("#sendpvbox").addClass("hidden");
                $('#message').focus();
            }
            $('#pubChan').css('cursor', 'pointer');
            $('#pubChan').click(setPublic);
            setPublic();
    // Reference the auto-generated proxy for the hub.
            var chat = $.connection.chatHub;
            // Create a function that the hub can call back to display messages.
            chat.client.addMessage = function (name, message) {
                // Add the message to the page.
                $('#discussion').append('<li class="discussion"><strong>' + htmlEncode(name)
                    + '</strong>: ' + htmlEncode(message) + '</li>')
            };
            chat.client.addPV = function (name, message) {
                if (!$("#mute").prop('checked'))
                 { 
                      audio.play(); 
                  }
                // Add the pv to the page.
                $('#discussion').append('<li class="pv"><strong>' + htmlEncode(name)
                    + '</strong>: ' + htmlEncode(message) + '</li>')
            };
            $.fn.filterByData = function (prop, val) {
                return this.filter(
                    function () { return $(this).data(prop) == val; }
                );
            }

            var onUserDisconnected = function (cxid) {
                $('#userlist li').filter(function () {
                    var nids = $(this).data("cxids").filter(function () {
                        return $(this) !== cxid
                    });
                    if (nids.Length == 0) $(this).remove();
                    else $(this).data("cxids", nids)
                });
            };
            var onUserConnected = function (cxid, username) {
                var connected = $('#userlist li').filterByData("name", username);
                if (connected.length > 0) {
                    var ids = connected.data("cxids");
                    ids.push(cxid);
                    connected.data("cxids", ids)
                } else {
                    addULI(username, [cxid])
                }
            };
            chat.client.notify = function (tag, message, data) {
                if (data) {
                    // Add the pv to the page.

                    if (tag === 'connected') {
                        onUserConnected(message, data);
                        $('#discussion').append('<li class="notif"><i>' + htmlEncode(tag)
                            + '</i> ' + htmlEncode(data) + '</li>')
                    }
                    else if (tag === 'disconnected') {
                        onUserDisconnected(message, data);
                        $('#discussion').append('<li class="notif"><i>' + htmlEncode(tag)
                            + '</i> ' + htmlEncode(data) + '</li>')
                    }
                    else {
                        $('#discussion').append('<li class="notif"><i>' + htmlEncode(tag)
                            + '</i> ' + htmlEncode(message) + ' : ' + htmlEncode(data) + '</li>')
                    }
                }
            };

            var sendMessage = function () {
                chat.server.send($('#displayname').val(), $('#message').val());
                // Clear text box and reset focus for next comment.
                $('#message').val('')
            };

            var sendPV = function () {
                var msg = $('#pv').val();
                // Call the Send method on the hub.
                $.each(pvuis.CXs, function () {
                    chat.server.sendPV(this, msg);
                });
                $('#discussion').append('<li class="pv">' + htmlEncode(pvuis.UserName)
                    + '<< ' + htmlEncode(msg) +'</li>');
                // Clear text box and reset focus for next comment.
                $('#pv').val('');
            }

            // Start the connection.
            $.connection.hub.start().done(function () {
                onCx();
                $('#sendmessage').click(function () {
                    // Call the Send method on the hub.
                    sendMessage();
                    $('#message').focus();
                });
                $("#message").keydown(function (event) {
                    if (event.which == 13) {
                        sendMessage()
                    }
                });
                $("#pv").keydown(function (event) {
                    if (event.which == 13) {
                        sendPV()
                    }
                });
                $('#sendpv').click(function () {
                    // Call the Send method on the hub.
                    sendPV();
                    $("#sendpv").focus()
                });
            });

$.connection.hub.disconnected(function () {
    onDisCx();
});

$(window).unload(function () { chat.server.abort(); });

};
chatinit(this);