/*!
 * @license
 * Copyright 2016 Alfresco Software, Ltd.
 *
 * 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 { TranslateModule, TranslateLoader } from 'ng2-translate/ng2-translate';
import { Injector } from '@angular/core';
import { ResponseOptions, Response, XHRBackend, HttpModule } from '@angular/http';
import { MockBackend, MockConnection } from '@angular/http/testing';
import { getTestBed, TestBed } from '@angular/core/testing';

import { AlfrescoTranslateService } from './translate.service';
import { AlfrescoTranslateLoader } from './translate-loader.service';

const mockBackendResponse = (connection: MockConnection, response: string) => {
    connection.mockRespond(new Response(new ResponseOptions({body: response})));
};

describe('AlfrescoTranslateService', () => {
    let injector: Injector;
    let backend: MockBackend;
    let alfrescoTranslationService: AlfrescoTranslateService;
    let connection: MockConnection; // this will be set when a new connection is emitted from the backend.

    beforeEach(() => {
        TestBed.configureTestingModule({
            imports: [HttpModule, TranslateModule.forRoot({
                provide: TranslateLoader,
                useClass: AlfrescoTranslateLoader
            })],
            providers: [
                AlfrescoTranslateService,
                {provide: XHRBackend, useClass: MockBackend}
            ]
        });
        injector = getTestBed();
        backend = injector.get(XHRBackend);
        alfrescoTranslationService = injector.get(AlfrescoTranslateService);
        backend.connections.subscribe((c: MockConnection) => connection = c);
        alfrescoTranslationService.addTranslationFolder('fake-name', 'fake-path');
    });

    it('is defined', () => {
        expect(AlfrescoTranslateService).toBeDefined();
        expect(alfrescoTranslationService instanceof AlfrescoTranslateService).toBeTruthy();
    });

    it('should be able to get translations of the KEY: TEST', () => {
        alfrescoTranslationService.get('TEST').subscribe((res: string) => {
            expect(res).toEqual('This is a test');
        });

        mockBackendResponse(connection, '{"TEST": "This is a test", "TEST2": "This is another test"}');
    });

    it('should be able to get translations of the KEY: TEST2', () => {
        alfrescoTranslationService.get('TEST2').subscribe((res: string) => {
            expect(res).toEqual('This is another test');
        });

        mockBackendResponse(connection, '{"TEST": "This is a test", "TEST2": "This is another test"}');
    });

});