angular.module('superdesk.apps.dashboard.grid', [])
    /**
     * sdGrid is directive which add functionality of dashboard. It is possible
     * to add, remove, move, edit, resize widgets within dashboard. It is working with gridster.js
     * library to enable all of this.
     *
     * Usage:
     * <div sd-grid
     *  class="gridster"
     *  ng-class="{editmode: widgetBoxStatus}"
     *  data-status="widgetBoxStatus"
     *  data-widgets="widgets"></div>
     *
     * Params:
     * @scope {Boolean} status - on/off switch for widget
     * @scope {List} widgets
     * @scope {Object} dashboard
     */
    .directive('sdGrid', () => ({
        scope: {
            status: '=',
            widgets: '=',
            save: '&',
            configurable: '=',
        },
        templateUrl: 'scripts/apps/dashboard/grid/views/grid.html',
        controller: ['$scope', function GridController($scope) {
            this.addWidget = function(widget, element) {
                widget.active = true;
                widget.el = $scope.gridster.add_widget(
                    element,
                    widget.sizex,
                    widget.sizey,
                    widget.col,
                    widget.row,
                );
            };

            this.removeWidget = function(widget, element) {
                $scope.gridster.remove_widget(element);
                widget.active = false;
                $scope.syncWidgets();
            };

            this.resizeWidget = function(element, sizex, sizey) {
                $scope.gridster.resize_widget(element, sizex, sizey);
                $scope.syncWidgets();
            };
        }],
        link: function(scope, element, attrs) {
            scope.syncWidgets = function() {
                angular.forEach(scope.widgets, (widget) => {
                    if (widget.active) {
                        var sizes = scope.gridster.serialize(widget.el);

                        angular.extend(widget, {
                            row: sizes[0].row,
                            col: sizes[0].col,
                            sizex: sizes[0].size_x,
                            sizey: sizes[0].size_y,
                        });
                    }
                });
            };

            var root = element.find('ul');

            scope.gridster = root.gridster({
                widget_margins: [20, 20],
                widget_base_dimensions: [320, 250],
                min_rows: 3,
                min_cols: 3,
                draggable: {
                    stop: function(e, ui, $widget) {
                        scope.syncWidgets();
                    },
                },
            }).data('gridster');

            scope.$watch('status', (status) => {
                if (scope.gridster) {
                    if (status === true) {
                        scope.gridster.enable();
                    } else {
                        scope.gridster.disable();
                    }
                }
            });

            scope.$on('$destroy', () => {
                scope.gridster.remove_all_widgets();
                scope.gridster.destroy();
                scope.gridster = null;
            });
        },
    }))
    /**
     * sdGridItem is a widget wrapper. Adds resize/remove buttons.
     */
    .directive('sdGridItem', () => ({
        require: '^sdGrid',
        transclude: true,
        templateUrl: 'scripts/apps/dashboard/grid/views/grid-item.html',
        link: function(scope, element, attrs, sdGrid) {
            sdGrid.addWidget(scope.widget, element);

            scope.removeWidget = function() {
                sdGrid.removeWidget(scope.widget, element);
            };

            scope.resizeWidget = function(widget, direction) {
                switch (direction) {
                case 'left':
                    if (widget.sizex !== 1) {
                        widget.sizex--;
                    }
                    break;
                case 'right':
                    if (widget.sizex !== widget.max_sizex) {
                        widget.sizex++;
                    }
                    break;
                case 'up':
                    if (widget.sizey !== 1) {
                        widget.sizey--;
                    }
                    break;
                case 'down':
                    if (widget.sizey !== widget.max_sizey) {
                        widget.sizey++;
                    }
                    break;
                }

                sdGrid.resizeWidget(element, widget.sizex, widget.sizey);
            };
        },
    }));