(function(){

    "use strict";

    angular
        .module("app.utils")
        .factory("appUtils.tableSearcher", tableSearcher);

    function tableSearcher(dataTableConstant){

        var data = [], initData = [], isFirst = true;

        return {
            define: define,
            getData: getData,
            keypress: keypress,
            searchByQuery: searchByQuery,
            setPaging: setPaging,
            sortBy: sortBy,
            sortByFilters: sortByFilters,
            CONST: dataTableConstant
        };

        function define(collection){
            if (isFirst) {
                data = initData = collection;
                isFirst = !isFirst;
            } else {
                data = collection;
            }
        }

        function getData(){
            return data;
        }

        function keypress($event, callback){
            if ($event.keyCode == 13) callback();
            return false;
        }

        function searchByQuery(query){
            data = initData;
            if (query != null) {
                return data.filter(function(el){
                    var keys = Object.keys(el),
                        isExist;
                    isExist = keys.some(function(k){
                        var temp = el[k].toString();
                        return temp.indexOf(query) > -1;
                    });
                    return isExist;
                });
            } else {
                return data;
            }
        }

        function setPaging($scope){
            var begin = (($scope.bigCurrentPage - 1) * $scope.itemsPerPage)
                , end = begin + $scope.itemsPerPage;
            return data ? getData().slice(begin, end) : [];
        }

        function sortBy(orderBy, vm){
            vm.orderBy = orderBy;
            vm.orderDirection = vm.orderDirection == "asc" ? "desc" : "asc" ;
            if(vm.applyFilters){
                vm.applyFilters();
            }else if(vm.search){
                vm.search();
            }

            // Icon behaviour near the table headers when user clicked there.
            var icon = $(dataTableConstant.SORT_OPTIONS.ICON);
            icon.show();
            vm.sorterIcon = vm.orderDirection == "desc" ? dataTableConstant.SORT_OPTIONS.DESC_ICON : dataTableConstant.SORT_OPTIONS.ASC_ICON;
            $(dataTableConstant.SORT_OPTIONS.HEADER_ID_PREFIX + orderBy).append(icon);

        }

        function sortByFilters(orderBy, vm){
            vm.orderBy = orderBy;
            vm.orderDirection = vm.orderDirection == "Asc" ? "Desc" : "Asc" ;
            vm.orderParam = vm.orderDirection == "Desc" ? vm.orderBy + 'Desc' : vm.orderBy;
            vm.applyFilters();

            // Icon behaviour near the table headers when user clicked there.
            var icon = $(dataTableConstant.SORT_OPTIONS.ICON);
            icon.show();
            vm.sorterIcon = vm.orderDirection == "Desc" ? dataTableConstant.SORT_OPTIONS.DESC_ICON : dataTableConstant.SORT_OPTIONS.ASC_ICON;
            $(dataTableConstant.SORT_OPTIONS.HEADER_ID_PREFIX + orderBy).append(icon);

        }

    }

    // IoC container.
    tableSearcher.$inject = [
        "appConstant.dataTable"
    ];

})();