(function(){

    angular
        .module("app.utils")
        .service("appUtils.datePickerService", ["$filter", function($filter){

            /**
             * Major method to initialize date picker into special html-inputs and set appropriate
             * behaviour into them. Input have to be like this:
             * <input id="from-date" type="text" class="form-control" datepicker-popup="dd/M/yy" ng-model="Monitoring.DateFormat.From" is-open="startOpened" ng-init="startOpened = false" min-date="Monitoring.DateFormat.Minimal" max-date="Monitoring.DateFormat.Today" ng-required="true" close-text="Close" ng-click="startOpen($event)" />
             * @param $scope {Object}
             */
            this.init = function($scope){

                $scope.today = function () {
                    $scope.dt = new Date();
                };
                $scope.today();

                $scope.clear = function () {
                    $scope.dt = null;
                };

                // Disable weekend selection
                $scope.disabled = function (date, mode) {
                    return (mode === 'day' && (date.getDay() === 0 || date.getDay() === 6));
                };

                $scope.toggleMin = function () {
                    $scope.minDate = $scope.minDate ? null : new Date();
                };
                $scope.toggleMin();

                $scope.open = function ($event) {
                    $event.preventDefault();
                    $event.stopPropagation();

                    $scope.opened = !$scope.opened;
                };
                $scope.endOpen = function ($event) {
                    $event.preventDefault();
                    $event.stopPropagation();
                    $scope.startOpened = false;
                    $scope.endOpened = !$scope.endOpened;
                };
                $scope.startOpen = function ($event) {
                    $event.preventDefault();
                    $event.stopPropagation();
                    $scope.endOpened = false;
                    $scope.startOpened = !$scope.startOpened;
                };

                $scope.dateOptions = {
                    formatYear: 'yy',
                    startingDay: 1
                };

                $scope.formats = ['MM/dd/yyyy', 'dd-MMMM-yyyy', 'yyyy/MM/dd', 'dd.MM.yyyy', 'shortDate'];
                $scope.format = $scope.formats[0];

                $scope.hstep = 1;
                $scope.mstep = 15;

                // Time Picker
                $scope.options = {
                    hstep: [1, 2, 3],
                    mstep: [1, 5, 10, 15, 25, 30]
                };

                $scope.ismeridian = true;
                $scope.toggleMode = function () {
                    $scope.ismeridian = !$scope.ismeridian;
                };

                $scope.update = function () {
                    var d = new Date();
                    d.setHours(14);
                    d.setMinutes(0);
                    $scope.dt = d;
                };

                $scope.changed = function () {
                    $log.log('Time changed to: ' + $scope.dt);
                };

                $scope.clear = function () {
                    $scope.dt = null;
                };

            };

            this.convertStringToDate = convertStringToDate;
            this.generateDateFirstDay = generateDateFirstDay;
            this.generateDateLastDay = generateDateLastDay;
            this.generateMinimalDay = generateMinimalDay;
            this.generateTodaysDay = generateTodaysDay;
            this.generateWeekAgo = generateWeekAgo;
            this.getInitialData = getInitialData;
            this.resetToDefault = resetToDefault;
            this.renderJQueryDatePicker = renderJQueryDatePicker;

            function convertStringToDate(string, mask){
                return $filter('date')(new Date(Date.parse(string)), mask)
            }

            function generateDateFirstDay(){
                var today = new Date(),
                    firstDayUTC = new Date(today.getFullYear(), today.getMonth(), 1);
                return $filter('date')(Date.parse(firstDayUTC), 'yyyy-MM-dd');
            }

            function generateDateLastDay(){
                var today = new Date(),
                    lastDayUTC = new Date(today.getFullYear(), today.getMonth() + 1, 0);
                return $filter('date')(Date.parse(lastDayUTC), 'yyyy-MM-dd');
            }

            function generateTodaysDay(){
                var today = new Date();
                return $filter('date')(Date.parse(today), 'yyyy-MM-dd');
            }

            function generateMinimalDay(string){
                return string; // using format -> '2014-01-01'
            }

            function generateWeekAgo(){
                return $filter("date")(new Date(new Date().setDate(new Date().getDate()-6)), "yyyy-MM-dd");
            }

            function generateThreeDaysFuture(number){
                var someDate = new Date();
                someDate.setDate(someDate.getDate() + number);
                return $filter("date")(someDate, 'yyyy-MM-dd');
            }

            function getInitialData(){
                return {
                    From: generateWeekAgo(),
                    Minimal: generateMinimalDay(),
                    To: generateTodaysDay(),
                    Today: generateTodaysDay(),
                    WeekAgo: generateWeekAgo(),
                    DaysInFuture: generateThreeDaysFuture(365)
                }
            }

            function resetToDefault(dateValues, param){
                dateValues.forEach(function(d){
                    d = param;
                });
            }

            function renderJQueryDatePicker(htmlId, val, $scope, dateType, dateTypeId){
                var selected = $scope[val] || val;
                $( htmlId ).datepicker({
                    defaultDate: new Date(),
                    changeMonth: true,
                    numberOfMonths: 1,
                    onClose: function( selectedDate ) {
                        //$( "#to" ).datepicker( "option", "minDate", selectedDate );
                        if (dateType && dateTypeId) {
                            $(dateTypeId).datepicker("option", dateType, selectedDate);
                        }
                        selected = $( htmlId ).datepicker( "getDate" );
                    }
                })
            }

        }]);

})();