globalApp
    .provider(
        "menuService",
        function () {
            this.items = [];
            this.allItems = [];

            this.currCount = 0;

            var that = this;

            this.tryPush = function (item) {

                item.order = item.order || 100; //default position;

                //Eliminate similar srefs
                for (var ii in that.allItems) {
                    var i = that.allItems[ii];

                    var iKey = (i.sref || "") + (i.click || "");
                    var itemKey = (item.sref || "") + (item.click || "");


                    if (iKey === itemKey) {
                        for (var k in item) i[k] = item[k];
                        return null;
                    }
                }

                that.currCount++;
                item.insertionOrder = that.currCount;
                    that.allItems.push(item);
                    return item;
            }

            return ({
                register: function (item) { // Allows this provider to be consumed on Config() stage
                    that.tryPush(item);
                    return this;
                },
                $get: function (authService) {

                    that.sortItems = function () {

                        that.items.sort(function (a, b) {
                            return a.insertionOrder - b.insertionOrder;
                        });


                        that.items.sort(function (a, b) {
                            return a.order - b.order;
                        });
                    };

                    that.evaluate = function (item, doNotRefresh) {

                        if(!item)return;

                        var accept = item.permissionSet ? authService.hasPermission(item.permissionSet) : true;

                        if (accept) {
                            that.items.push(item);
                            if (!!!doNotRefresh)
                                that.sortItems();
                        }
                    };

                    that.evaluateAll = function () {

                        that.items.length = 0;

                        angular.forEach(that.allItems, function (item) {
                            that.evaluate(item, true);
                        });

                        that.sortItems();
                    };

                    authService.events.onChange(null, function () {
                        that.evaluateAll();
                    });

                    return {
                        // Normal usage during Run() stage
                        register: function (item) {
                            that.evaluate(that.tryPush(item));
                        },
                        evaluateAll: that.evaluateAll,
                        items: that.items
                    };
                }
            });
        });