"use strict";
(function () {
    'use strict';
    angular.module('myitsmApp')
        .directive('fileDropTarget', ['$filter', '$timeout', 'attachmentService', 'systemAlertService',
        function ($filter, $timeout, attachmentService, systemAlertService) {
            return {
                restrict: 'A',
                replace: false,
                link: function (scope, $elem, attr) {
                    var maxAttachments = 3;
                    var clearMaxFielsObserve = attr.$observe('maxFiles', function (newVal) {
                        if (newVal && !isNaN(newVal)) {
                            maxAttachments = Number(newVal);
                        }
                    });
                    function dragOverHandler($event) {
                        var originalEvent = $event.originalEvent;
                        $event.stopPropagation();
                        $event.preventDefault();
                        originalEvent.dataTransfer.dropEffect = 'copy';
                        $elem.addClass('drag-over');
                    }
                    function dragLeaveDragEndHandler() {
                        $elem.removeClass('drag-over');
                    }
                    function dropHandler($event) {
                        $event.stopPropagation();
                        $event.preventDefault();
                        $elem.removeClass('drag-over');
                        var files = $event.originalEvent.dataTransfer.files;
                        if (scope.attachments && scope.attachments.length === maxAttachments) {
                            $timeout(function () {
                                showWarning();
                            });
                            return false;
                        }
                        if (scope.attachments && scope.attachments.length < maxAttachments) {
                            var freeSlots = parseInt(maxAttachments - scope.attachments.length);
                            if (files.length > freeSlots) {
                                $timeout(function () {
                                    showWarning();
                                });
                                return false;
                            }
                            if (files && files.length) {
                                _.each(files, function (file) {
                                    var attachment = attachmentService.prepareFileToUpload({
                                        fileToPrepare: file,
                                        droppedFile: true
                                    });
                                    if (attachment && attachment.size <= 0) {
                                        systemAlertService.warning({
                                            text: $filter('i18n')('attachment.file_empty'),
                                            icon: 'icon-exclamation_triangle',
                                            clear: true,
                                            hide: 5000
                                        });
                                        return;
                                    }
                                    scope.attachments ? scope.attachments.push(attachment) : angular.noop();
                                });
                            }
                        }
                    }
                    $elem
                        .on('dragover', dragOverHandler)
                        .on('dragleave dragend', dragLeaveDragEndHandler)
                        .on('drop', dropHandler);
                    scope.$on("$destroy", function () {
                        console.log("fileDropTarget: unbind events");
                        $elem.off('dragover', dragOverHandler);
                        $elem.off('dragleave', dragLeaveDragEndHandler);
                        $elem.off('dragend', dragLeaveDragEndHandler);
                        $elem.off('drop', dropHandler);
                        $elem.off();
                        clearMaxFielsObserve();
                    });
                    function showWarning() {
                        var notification = $filter('i18n')('timeline.note.max.attachments', maxAttachments);
                        systemAlertService.error({
                            text: notification,
                            clear: false
                        });
                        return;
                    }
                }
            };
        }
    ]);
})();