/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed 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.
 * ============LICENSE_END=========================================================
 */
/// <reference path="../../references.ts"/>
module Sdc.ViewModels {
    'use strict';

    export class BreadcrumbsMenuItem {
        key: string;
        displayText: string;
    }

    export class BreadcrumbsMenu {
        selectedKey: string;
        menuItems: Array<BreadcrumbsMenuItem>;
    }

    export class BreadcrumbsPath {
        selectedKeys: Array<string>;
    }

    export class VendorData {
        breadcrumbs: BreadcrumbsPath;
    }

    export interface IOnboardVendorViewModelScope extends ng.IScope {
        vendorData: VendorData;
        onVendorEvent: Function;
        topNavMenuModel: Array<Utils.MenuItemGroup>;
        topNavRootMenu: Utils.MenuItemGroup;
        user:Models.IUserProperties;
        version:string;
    }

    export class OnboardVendorViewModel {
        static '$inject' = [
            '$scope',
            '$q',
            'Sdc.Services.CacheService'
        ];

        private firstControlledTopNavMenu: Utils.MenuItemGroup;

        constructor(
            private $scope: IOnboardVendorViewModelScope,
            private $q: ng.IQService,
            private cacheService:Services.CacheService
        ) {

            this.$scope.vendorData = {
                breadcrumbs: {
                    selectedKeys: []
                }
            };

            this.$scope.version = this.cacheService.get('version');

            this.$scope.onVendorEvent = (eventName:string, data:any): void => {
                switch (eventName) {
                    case 'breadcrumbsupdated':
                        this.handleBreadcrumbsUpdate(data);
                        break;
                }
            };

            this.$scope.topNavMenuModel = [];

            this.$scope.user = this.cacheService.get('user');
        }

        updateBreadcrumbsPath = (selectedKeys: Array<string>): ng.IPromise<boolean> => {
            let topNavMenuModel = this.$scope.topNavMenuModel;
            let startIndex = topNavMenuModel.indexOf(this.firstControlledTopNavMenu);
            if (startIndex === -1) {
                startIndex = topNavMenuModel.length;
            }
            topNavMenuModel.splice(startIndex + selectedKeys.length);
            this.$scope.vendorData = {
                breadcrumbs: { selectedKeys: selectedKeys }
            };

            return this.$q.when(true);
        };

        handleBreadcrumbsUpdate(breadcrumbsMenus: Array<BreadcrumbsMenu>): void {
            let selectedKeys = [];
            let topNavMenus = breadcrumbsMenus.map((breadcrumbMenu, breadcrumbIndex) => {
                let topNavMenu = new Utils.MenuItemGroup();
                topNavMenu.menuItems = breadcrumbMenu.menuItems.map(menuItem =>
                    new Utils.MenuItem(
                        menuItem.displayText,
                        this.updateBreadcrumbsPath,
                        null,
                        null,
                        [selectedKeys.concat([menuItem.key])]
                    )
                );
                topNavMenu.selectedIndex = _.findIndex(
                    breadcrumbMenu.menuItems,
                    menuItem => menuItem.key === breadcrumbMenu.selectedKey
                );
                selectedKeys.push(breadcrumbMenu.selectedKey);
                return topNavMenu;
            });

            let topNavMenuModel = this.$scope.topNavMenuModel;
            let len = topNavMenuModel.length;
            let startIndex = topNavMenuModel.indexOf(this.firstControlledTopNavMenu);
            if (startIndex === -1) {
                startIndex = len;
            }
            topNavMenuModel.splice(startIndex, len - startIndex);
            topNavMenuModel.push.apply(topNavMenuModel, topNavMenus);
            this.firstControlledTopNavMenu = topNavMenus[0];

            if (startIndex === 1 && this.$scope.topNavRootMenu == null) {
                let topNavRootMenu = topNavMenuModel[0];
                let onboardItem = topNavRootMenu.menuItems[topNavRootMenu.selectedIndex];
                let originalCallback = onboardItem.callback;
                onboardItem.callback = (...args) => {
                    let ret = this.updateBreadcrumbsPath([]);
                    return originalCallback && originalCallback.apply(undefined, args) || ret;
                };
                this.$scope.topNavRootMenu = topNavRootMenu;
            }

            this.updateBreadcrumbsPath(selectedKeys);
        }
    }


}