var Base64 = {

    // private property
    _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    // public method for encoding
    encode: function(input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;

        input = Base64._utf8_encode(input);

        while (i < input.length) {

            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);

            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;

            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }

            output = output +
			this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
			this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);

        }

        return output;
    },

    // public method for decoding
    decode: function(input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;

        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < input.length) {

            enc1 = this._keyStr.indexOf(input.charAt(i++));
            enc2 = this._keyStr.indexOf(input.charAt(i++));
            enc3 = this._keyStr.indexOf(input.charAt(i++));
            enc4 = this._keyStr.indexOf(input.charAt(i++));

            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }

        }

        output = Base64._utf8_decode(output);

        return output;

    },

    // private method for UTF-8 encoding
    _utf8_encode: function(string) {
        string = string.replace(/\r\n/g, "\n");
        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if ((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    },

    // private method for UTF-8 decoding
    _utf8_decode: function(utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;

        while (i < utftext.length) {

            c = utftext.charCodeAt(i);

            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else if ((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i + 1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            }
            else {
                c2 = utftext.charCodeAt(i + 1);
                c3 = utftext.charCodeAt(i + 2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }

        }

        return string;
    }

}

String.prototype.namespace=function(separator){var ns = this.split(separator||'.'),p=window;for(i=0;i<ns.length;i++){p=p[ns[i]]=p[ns[i]]||{};}};

"Codeproject.Chat".namespace();

Codeproject.Chat.Init = function() {
    //Global elements
    Codeproject.Chat.AllMessagePanel = "#allMessagePanel";
    Codeproject.Chat.UserPanel = "#userPanel";
    Codeproject.Chat.UserName = "#userName";
    Codeproject.Chat.UserCount = document.getElementById("userCount");
    Codeproject.Chat.MessagePanel = "messagePanel";
    Codeproject.Chat.MessageList = "messageList";
    Codeproject.Chat.MessageTextbox = "txtMessage";
    Codeproject.Chat.ButtonSend = "cmdSend";


    //Codeproject.Chat.CheckUsersRefresh = 60000;
    Codeproject.Chat.CheckMessagesRefresh = 20000;
    Codeproject.Chat.LastMessageId = 0;
    Codeproject.Chat.StopRefresh = false;
    //Codeproject.Chat.ClearHistory(0);

    var offValue = isIE() ? 62 : 58;
    $("#friendsonline").css('top', $('#fake_footer').position().top - offValue);    
    Codeproject.Chat.CheckMessages();

}

Codeproject.Chat.CheckUsersCallback = function(response)
{
	if (response.Users.length > 0)
	{
		Codeproject.Chat.ArrangeUsers(response.Users);
	}
}

Codeproject.Chat.CheckMessages = function() {

    $.ajax({
        type: "POST",
        url: "../../Chat/Services/Chat.asmx/CheckMessages",
        data: "{LastMessageId:" + Codeproject.Chat.LastMessageId + "}",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: Codeproject.Chat.CheckMessagesCallback,
        failure: function(response) {
            //alert(response);
            Codeproject.Chat.StopRefresh = true;
            //$("#friendsonline").hide();
        }
    });
    if (!Codeproject.Chat.StopRefresh) {
        setTimeout(Codeproject.Chat.CheckMessages, Codeproject.Chat.CheckMessagesRefresh);
    }
}

Codeproject.Chat.CheckMessagesCallback = function(response) {

    Codeproject.Chat.UserCount.innerHTML = response.d.Users.length;
    if (response.d.Users.length > 0) {
        $("friendsonline").show();
        Codeproject.Chat.ArrangeUsers(response.d.Users);
    } else {
        $("friendsonline").hide();
    }
    if (response.d.Messages.length > 0) {
        Codeproject.Chat.LastMessageId = response.d.LastMessageId
        Codeproject.Chat.ArrangeMessages(response.d.Messages, response.d.My_User_Id);
    }
}


Codeproject.Chat.ArrangeMessages = function(messages, my_User_Id) {

    var activeUser = $("span#userNamePanel").attr('value');

    for (var i = 0; i < messages.length; i++) {

        var fromUser = messages[i].From_User_ID;
        var huser = $('#huser_' + fromUser);
        if (huser.length > 0) {
            var maxid = huser.attr('value');
            if (maxid < messages[i].ID) {
                huser.attr('value', messages[i].ID);
                if (fromUser != activeUser) {
                    $('#user_' + fromUser).attr('class', 'chat_link new_messages');
                    $('#huser_' + fromUser).attr('name', '1');
                } else {
                    if ($('#chat_max_view').attr('style') == 'display: none;') {
                        $('#userMiniNamePanel').attr('class', 'selected');
                    } else {
                        $('#userMiniNamePanel').attr('class', '');
                    }
                }
            }
        }

        if ($('.new_messages').length > 0)
            $('#friendsTitle').attr('class', 'title title_new');
        else
            $('#friendsTitle').attr('class', 'title');

        if (messages[i].To_User_ID == my_User_Id && messages[i].From_User_ID == activeUser) {
            Codeproject.Chat.InsertMessage(messages[i], false);
        } else if (messages[i].From_User_ID == my_User_Id && messages[i].To_User_ID == activeUser) {
            Codeproject.Chat.InsertMessage(messages[i], true);
        } else if (messages[i].From_User_ID != activeUser && messages[i].To_User_ID == my_User_Id) {

            /*if (lastId == null || messages[i].ID > lastId) {                
            $('#user_' + messages[i].From_User_ID).attr('class', 'new_messages');
            $('#friendsTitle').attr('class', 'title new_messages');
            }*/
        }
    }
}

Codeproject.Chat.InsertMessage = function(message, my) {

    var myClass = my ? 'myText' : '';
    var id = 'c_m_ ' + message.ID;

    var m = document.getElementById(id);
    if (!(m != null && m != undefined)) {
        var itemText = '<li class="' + myClass + '" id="' + id + '"><span class="userName">' + message.From_User_Name + '</span>:';
        itemText += message.Message + '</li>';

        var element = $(itemText);
        $("#messageList").append(element);
        $('#messageList').scrollTop($('#messagePanel').height());  //$('#messagePanel').scrollHeight;
    }
}



Codeproject.Chat.SendMessage = function (userId)
{
    var message = $('#messageTextBox');
    
    //var messageUrl = "../../Chat/Services/Chat.asmx/SendMessage?message=" + escape(message.val()) + "&toUser=" + escape(userId) + "&lastMessageId=" + escape(Codeproject.Chat.LastMessageId);
    //type: "POST",
    //data: "{message:'" + message.val() + "',toUser:" + userId + ",lastMessageId:" + Codeproject.Chat.LastMessageId + "}",
	if (message.val() != "") {	    
	    var messageUrl = "../../Chat/Services/Chat.asmx/SendMessage";
	    var messageData = "{message:'" + Base64.encode(message.val()) + "',toUser:" + userId + ",lastMessageId:" + Codeproject.Chat.LastMessageId + "}";
	    //var dataObj = { message: message.val(), toUser: userId, lastMessageId: Codeproject.Chat.LastMessageId }; 
	
		$.ajax({
		    type: "POST",
		    url: messageUrl,
		    data: messageData,
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: Codeproject.Chat.CheckMessagesCallback
            });
		message.attr('value','');	
	}
}

Codeproject.Chat.CheckSend = function(e, userId) {    
    var keynum = e.keyCode;
    if (keynum == null || keynum == 0)
        keynum = e.which;
    if (keynum == 13) {
        Codeproject.Chat.SendMessage(userId);
    }
}
Codeproject.Chat.ShowHideUserPanel= function(){
    		//if ($(Codeproject.Chat.UserPanel ).css('display') == 'none') {            	    	
	    	    $(Codeproject.Chat.UserPanel).attr("class","user_panel_active");
	    	    Codeproject.Chat.UserCount.parentNode.className="user_list_active";
	    	//}else{
	    	    //$(Codeproject.Chat.UserPanel).attr("class","user_panel_disable");
	    	    //Codeproject.Chat.UserCount.parentNode.className="user_list_disable";
	        //}
}


Codeproject.Chat.ArrangeUsers = function(users) {
    //var list = $("<UL>");
    var list = $("#friendsonline ul");
    var listOfElements = [];


    var userList = $('#hiddenUsers');

    list.empty();
    for (var i = 0; i < users.length; i++) {

        var userData = $('#huser_' + users[i].UserId);
        var selectedClass = 'chat_link';
        if (userData.length == 0) {
            var input = $("<input type='hidden' id='huser_" + users[i].UserId + "' value='0' name='0'/>");
            $('#hiddenUsers').append(input);            
        } else {
            if (userData.attr('name') == '1')
                selectedClass = 'chat_link new_messages';
        }      
         
         var itemToPush = $("<li class='" + selectedClass +"'>" + users[i].UserName + "</li>").attr('id', 'user_' + users[i].UserId).click(function(item) {
                var id = item.currentTarget;
                var index = $(id).attr('value');
                var userId = users[index].UserId;
                Codeproject.Chat.OpenMessagePanel(userId, users[index].UserName);
            });
         itemToPush.attr('value', i);
         list.append(itemToPush);                   
    }    
    

    var fStr = " friends";
    if (users.length == 1)
        fStr = " friend";
    $("#friendsonline .title").text("Online " + users.length + fStr);
    $(window).resize();
}

Codeproject.Chat.OpenMessagePanel = function(userId, userName) {

    var activeUser = $("span#userNamePanel").attr('value');    
    if (activeUser != userId) { // || activeUser < 0
        
        $("#messageList").empty();    
    
        var userInfo = $.ajax({
            url: '/Account2.aspx/GetUserInfo',
            data: 'id=' + userId,
            type: "POST",
            async: false
        }).responseText;

        var userData = eval('(' + userInfo + ')');

        $('#userInfo').text(userData.Name);
        $('#userAvatar').attr('src', userData.Picture);

        var txtMessage = $('#messageTextBox');
        txtMessage.keydown(function(event) {
            var activeUser = $("span#userNamePanel").attr('value');
            Codeproject.Chat.CheckSend(event, activeUser); 
        });

        var cmdSend = $("button#buttonSend");
        cmdSend.click(function() {
            var activeUser = $("span#userNamePanel").attr('value');
            Codeproject.Chat.SendMessage(activeUser); 
        });
                
        $("span#userNamePanel").text(userName);
        $("span#userMiniNamePanel").text(userName);
        $("span#userNamePanel").attr('value', userId);

        
        Codeproject.Chat.LastMessageId = 0;
        $('#huser_' + userId).attr('name', '0');        
        
        Codeproject.Chat.CheckMessages();
        

        var topPosition = $('#ads_box').position().top;
        var leftPosition = $('#ads_box').position().left > 452 ? $('#ads_box').position().left - 452 : 10;

        $('#chat_window').hide();
        $("#chat_window").css('top', topPosition);
        $("#chat_window").css('left', leftPosition);
        $('#chat_max_view').show();
        $('.chat_footer_mini').attr("class", 'chat_footer');
        $('#chat_window').show();
        
    }

}
Codeproject.Chat.ClearHistory = function(userId) {
    $.ajax({
        type: "POST",
        url: "../../Chat/Services/Chat.asmx/ClearHistory",
        data: "{userID:" + userId + ",lastMessageId:" + Codeproject.Chat.LastMessageId + "}",
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: Codeproject.Chat.CheckMessagesCallback
    });
    $("#messageList").empty();
    //$(Codeproject.Chat.AllMessagePanel+' #'+ Codeproject.Chat.MessagePanel+userId+" ul#"+Codeproject.Chat.MessageList).empty();
}
Codeproject.Chat.CloseChat = function (userId)
{
    alert('close');
}