// (C) Copyright 2015 Martin Dougiamas
//
// 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.

import { Injectable } from '@angular/core';
import { CoreCoursesProvider } from './courses';
import { CoreMainMenuHandler, CoreMainMenuHandlerData } from '../../mainmenu/providers/delegate';

/**
 * Handler to inject an option into main menu.
 */
@Injectable()
export class CoreCoursesMainMenuHandler implements CoreMainMenuHandler {
    name = 'mmCourses';
    priority = 1100;

    constructor(private coursesProvider: CoreCoursesProvider) {}

    /**
     * Check if the handler is enabled on a site level.
     *
     * @return {boolean} Whether or not the handler is enabled on a site level.
     */
    isEnabled(): boolean|Promise<boolean> {
        let myCoursesDisabled = this.coursesProvider.isMyCoursesDisabledInSite();

        // Check if overview side menu is available, so it won't show My courses.
        // var $mmaMyOverview = $mmAddonManager.get('$mmaMyOverview');
        // if ($mmaMyOverview) {
        //     return $mmaMyOverview.isSideMenuAvailable().then(function(enabled) {
        //         if (enabled) {
        //             return false;
        //         }
        //         // Addon not enabled, check my courses.
        //         return !myCoursesDisabled;
        //     });
        // }
        // Addon not present, check my courses.
        return !myCoursesDisabled;
    }

    /**
     * Returns the data needed to render the handler.
     *
     * @return {CoreMainMenuHandlerData} Data needed to render the handler.
     */
    getDisplayData(): CoreMainMenuHandlerData {
        return {
            icon: 'ionic',
            title: 'core.courses.mycourses',
            page: 'CoreCoursesMyCoursesPage',
            class: 'mm-mycourses-handler'
        };
    }
}