//######
//## This work is licensed under the Creative Commons Attribution-Share Alike 3.0 
//## United States License. To view a copy of this license, 
//## visit http://creativecommons.org/licenses/by-sa/3.0/us/ or send a letter 
//## to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
//######

(function ($) {
    $.fn.idleTimeout = function (options) {
        var defaults = {
            inactivity: 1200000, //20 Minutes
            noconfirm: 10000, //10 Seconds
            sessionAlive: 30000, //10 Minutes
            redirect_url: '/js_sandbox/',
            click_reset: true,
            alive_url: '/js_sandbox/',
            logout_url: '/js_sandbox/'
        }

        //##############################
        //## Private Variables
        //##############################
        var opts = $.extend(defaults, options);
        var liveTimeout, confTimeout, sessionTimeout;
        var modal = "<div id='modal_pop'><p>You're session will expire soon due to inactivity. You will be automatically logged out in " + opts.noconfirm / 1000 + 
        " seconds.</p></div>";
        //##############################
        //## Private Functions
        //##############################
        var start_liveTimeout = function () {
            clearTimeout(liveTimeout);
            clearTimeout(confTimeout);
            liveTimeout = setTimeout(logout, opts.inactivity);

            if (opts.sessionAlive) {
                clearTimeout(sessionTimeout);
                sessionTimeout = setTimeout(keep_session, opts.sessionAlive);
            }
        }

        var logout = function () {

            confTimeout = setTimeout(redirect, opts.noconfirm);
            $(modal).dialog({
                buttons: {
                    "Stay Logged In": function () {
                        $(this).dialog('close');
                        stay_logged_in();
                    },
                    "Logout Now": function () {
                        $(this).dialog('close');
                        if (opts.logout_url) {
                            $.get(opts.logout_url);
                        }
                        window.top.location.href = opts.redirect_url; //"top" is needed when being used inside an iframe
                    } 
                },
                modal: true,
                title: 'Auto Logout'
            });

        }

        var redirect = function () {
            if (opts.logout_url) {
                $.get(opts.logout_url);
            }
            window.top.location.href = opts.redirect_url; //"top" is needed when being used inside an iframe
        }

        var stay_logged_in = function (el) {
            start_liveTimeout();
            if (opts.alive_url) {
                $.get(opts.alive_url);
            }
        }

        var keep_session = function () {
            $.get(opts.alive_url);
            clearTimeout(sessionTimeout);
            sessionTimeout = setTimeout(keep_session, opts.sessionAlive);
        }

        //###############################
        //Build & Return the instance of the item as a plugin
        // This is basically your construct.
        //###############################
        return this.each(function () {
            obj = $(this);
            start_liveTimeout();
            if (opts.click_reset) {
                $(document).bind('click', start_liveTimeout);
            }
            if (opts.sessionAlive) {
                keep_session();
            }
        });

    };
})(jQuery);