/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import templateUrl from 'views/templates/batch-confirm.tpl.pug';
import {CancellationError} from 'app/errors/CancellationError';

// Service for confirm or skip several steps.
export default class IgniteConfirmBatch {
    static $inject = ['$rootScope', '$q', '$modal'];

    /**
     * @param {ng.IRootScopeService} $root 
     * @param {ng.IQService} $q
     * @param {mgcrea.ngStrap.modal.IModalService} $modal
     */
    constructor($root, $q, $modal) {
        const scope = $root.$new();

        scope.confirmModal = $modal({
            templateUrl,
            scope,
            show: false,
            backdrop: 'static',
            keyboard: false
        });

        const _done = (cancel) => {
            scope.confirmModal.hide();

            if (cancel)
                scope.deferred.reject(new CancellationError());
            else
                scope.deferred.resolve();
        };

        const _nextElement = (skip) => {
            scope.items[scope.curIx++].skip = skip;

            if (scope.curIx < scope.items.length)
                scope.content = scope.contentGenerator(scope.items[scope.curIx]);
            else
                _done();
        };

        scope.cancel = () => {
            _done(true);
        };

        scope.skip = (applyToAll) => {
            if (applyToAll) {
                for (let i = scope.curIx; i < scope.items.length; i++)
                    scope.items[i].skip = true;

                _done();
            }
            else
                _nextElement(true);
        };

        scope.overwrite = (applyToAll) => {
            if (applyToAll)
                _done();
            else
                _nextElement(false);
        };

        /**
         * Show confirm all dialog.
         * @template T
         * @param {(T) => string} confirmMessageFn Function to generate a confirm message.
         * @param {Array<T>} [itemsToConfirm] Array of element to process by confirm.
         */
        this.confirm = function confirm(confirmMessageFn, itemsToConfirm) {
            scope.deferred = $q.defer();

            scope.contentGenerator = confirmMessageFn;

            scope.items = itemsToConfirm;
            scope.curIx = 0;
            scope.content = (scope.items && scope.items.length > 0) ? scope.contentGenerator(scope.items[0]) : null;

            scope.confirmModal.$promise.then(scope.confirmModal.show);

            return scope.deferred.promise;
        };
    }
}