import { async, inject, ComponentFixture, TestBed } from '@angular/core/testing';
import { Title } from '@angular/platform-browser';
import { APP_BASE_HREF } from '@angular/common';
import { Http } from '@angular/http';
import { By } from '@angular/platform-browser';

import { BehaviorSubject} from 'rxjs/BehaviorSubject';
import { of } from 'rxjs/observable/of';

import { AppComponent } from './app.component';
import { AppModule } from './app.module';
import { DeviceService } from 'app/shared/device.service';
import { GaService } from 'app/shared/ga.service';
import { SearchResultsComponent } from 'app/search/search-results/search-results.component';
import { SearchBoxComponent } from 'app/search/search-box/search-box.component';
import { SearchService } from 'app/search/search.service';
import { MockSearchService } from 'testing/search.service';
import { AutoScrollService } from 'app/shared/auto-scroll.service';
import { LocationService } from 'app/shared/location.service';
import { MockLocationService } from 'testing/location.service';
import { Logger } from 'app/shared/logger.service';
import { MockLogger } from 'testing/logger.service';
import { SwUpdateNotificationsService } from 'app/sw-updates/sw-update-notifications.service';
import { MockSwUpdateNotificationsService } from 'testing/sw-update-notifications.service';

describe('AppComponent', () => {
  let component: AppComponent;
  let fixture: ComponentFixture<AppComponent>;

  let docViewer: HTMLElement;
  let hamburger: HTMLButtonElement;
  let locationService: MockLocationService;
  let sidenav: HTMLElement;

  const initialUrl = 'a/b';

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [ AppModule ],
      providers: [
        { provide: APP_BASE_HREF, useValue: '/' },
        { provide: DeviceService, useClass: TestDeviceService },
        { provide: GaService, useClass: TestGaService },
        { provide: Http, useClass: TestHttp },
        { provide: LocationService, useFactory: () => new MockLocationService(initialUrl) },
        { provide: Logger, useClass: MockLogger },
        { provide: SearchService, useClass: MockSearchService },
        { provide: SwUpdateNotificationsService, useClass: MockSwUpdateNotificationsService },
      ]
    });
    TestBed.compileComponents();
  }));

  beforeEach(() => {
    fixture = TestBed.createComponent(AppComponent);
    component = fixture.componentInstance;
    fixture.detectChanges();

    docViewer = fixture.debugElement.query(By.css('aio-doc-viewer')).nativeElement;
    hamburger = fixture.debugElement.query(By.css('.hamburger')).nativeElement;
    locationService = fixture.debugElement.injector.get(LocationService) as any;
    sidenav = fixture.debugElement.query(By.css('md-sidenav')).nativeElement;
  });

  it('should create', () => {
    expect(component).toBeDefined();
  });

  describe('ServiceWorker update notifications', () => {
    it('should be enabled', () => {
      const swUpdateNotifications = TestBed.get(SwUpdateNotificationsService) as SwUpdateNotificationsService;
      expect(swUpdateNotifications.enable).toHaveBeenCalled();
    });
  });

  describe('onResize', () => {
    it('should update `isSideBySide` accordingly', () => {
      component.onResize(1033);
      expect(component.isSideBySide).toBe(true);
      component.onResize(500);
      expect(component.isSideBySide).toBe(false);
    });
  });

  describe('SideNav when side-by-side (wide)', () => {

    beforeEach(() => {
      component.onResize(1033); // side-by-side
    });

    it('should open when nav to a guide page (guide/pipes)', () => {
      locationService.go('guide/pipes');
      fixture.detectChanges();
      expect(sidenav.className).toMatch(/sidenav-open/);
    });

    it('should open when nav to an api page', () => {
      locationService.go('api/a/b/c/d');
      fixture.detectChanges();
      expect(sidenav.className).toMatch(/sidenav-open/);
    });

    it('should be closed when nav to a marketing page (features)', () => {
      locationService.go('features');
      fixture.detectChanges();
      expect(sidenav.className).toMatch(/sidenav-clos/);
    });

    describe('when manually closed', () => {

      beforeEach(() => {
        locationService.go('guide/pipes');
        fixture.detectChanges();
        hamburger.click();
        fixture.detectChanges();
      });

      it('should be closed', () => {
        expect(sidenav.className).toMatch(/sidenav-clos/);
      });

      it('should stay closed when nav to another guide page', () => {
        locationService.go('guide/bags');
        fixture.detectChanges();
        expect(sidenav.className).toMatch(/sidenav-clos/);
      });

      it('should stay closed when nav to api page', () => {
        locationService.go('api');
        fixture.detectChanges();
        expect(sidenav.className).toMatch(/sidenav-clos/);
      });

      it('should reopen when nav to market page and back to guide page', () => {
        locationService.go('features');
        fixture.detectChanges();
        locationService.go('guide/bags');
        fixture.detectChanges();
        expect(sidenav.className).toMatch(/sidenav-open/);
      });
    });
  });

  describe('SideNav when NOT side-by-side (narrow)', () => {

    beforeEach(() => {
      component.onResize(1000); // NOT side-by-side
    });

    it('should be closed when nav to a guide page (guide/pipes)', () => {
      locationService.go('guide/pipes');
      fixture.detectChanges();
      expect(sidenav.className).toMatch(/sidenav-clos/);
    });

    it('should be closed when nav to an api page', () => {
      locationService.go('api/a/b/c/d');
      fixture.detectChanges();
      expect(sidenav.className).toMatch(/sidenav-clos/);
    });

    it('should be closed when nav to a marketing page (features)', () => {
      locationService.go('features');
      fixture.detectChanges();
      expect(sidenav.className).toMatch(/sidenav-clos/);
    });

    describe('when manually opened', () => {

      beforeEach(() => {
        locationService.go('guide/pipes');
        fixture.detectChanges();
        hamburger.click();
        fixture.detectChanges();
      });

      it('should be open', () => {
        expect(sidenav.className).toMatch(/sidenav-open/);
      });

      it('should close when click in gray content area overlay', () => {
        const sidenavBackdrop = fixture.debugElement.query(By.css('.mat-sidenav-backdrop')).nativeElement;
        sidenavBackdrop.click();
        fixture.detectChanges();
        expect(sidenav.className).toMatch(/sidenav-clos/);
      });

      it('should stay open when nav to another guide page', () => {
        locationService.go('guide/bags');
        fixture.detectChanges();
        expect(sidenav.className).toMatch(/sidenav-open/);
      });

      it('should stay open when nav to api page', () => {
        locationService.go('api');
        fixture.detectChanges();
        expect(sidenav.className).toMatch(/sidenav-open/);
      });

      it('should close again when nav to market page', () => {
        locationService.go('features');
        fixture.detectChanges();
        expect(sidenav.className).toMatch(/sidenav-clos/);
      });

    });
  });

  describe('pageId', () => {

    it('should set the id of the doc viewer container based on the current url', () => {
      const container = fixture.debugElement.query(By.css('section.sidenav-content'));

      locationService.go('guide/pipes');
      fixture.detectChanges();
      expect(component.pageId).toEqual('guide-pipes');
      expect(container.properties['id']).toEqual('guide-pipes');

      locationService.go('news');
      fixture.detectChanges();
      expect(component.pageId).toEqual('news');
      expect(container.properties['id']).toEqual('news');

      locationService.go('');
      fixture.detectChanges();
      expect(component.pageId).toEqual('home');
      expect(container.properties['id']).toEqual('home');
    });

    it('should not be affected by changes to the query or hash', () => {
      const container = fixture.debugElement.query(By.css('section.sidenav-content'));

      locationService.go('guide/pipes');
      fixture.detectChanges();

      locationService.go('guide/other?search=http');
      fixture.detectChanges();
      expect(component.pageId).toEqual('guide-other');
      expect(container.properties['id']).toEqual('guide-other');

      locationService.go('guide/http#anchor-1');
      fixture.detectChanges();
      expect(component.pageId).toEqual('guide-http');
      expect(container.properties['id']).toEqual('guide-http');
    });
  });

  describe('currentDocument', () => {

    it('should display a guide page (guide/pipes)', () => {
      locationService.go('guide/pipes');
      fixture.detectChanges();
      expect(docViewer.innerText).toMatch(/Pipes/i);
    });

    it('should display the api page', () => {
      locationService.go('api');
      fixture.detectChanges();
      expect(docViewer.innerText).toMatch(/API/i);
    });

    it('should display a marketing page', () => {
      locationService.go('features');
      fixture.detectChanges();
      expect(docViewer.innerText).toMatch(/Test Doc/i);
    });

    it('should update the document title', () => {
      const titleService = TestBed.get(Title);
      spyOn(titleService, 'setTitle');
      locationService.go('guide/pipes');
      fixture.detectChanges();
      expect(titleService.setTitle).toHaveBeenCalledWith('Angular - Pipes');
    });

    it('should update the document title, with a default value if the document has no title', () => {
      const titleService = TestBed.get(Title);
      spyOn(titleService, 'setTitle');
      locationService.go('file-not-found');
      fixture.detectChanges();
      expect(titleService.setTitle).toHaveBeenCalledWith('Angular');
    });
  });

  describe('autoScrolling', () => {
    it('should AutoScrollService.scroll when the url changes', () => {
      const scrollService: AutoScrollService = fixture.debugElement.injector.get(AutoScrollService);
      spyOn(scrollService, 'scroll');
      locationService.go('some/url#fragment');
      expect(scrollService.scroll).toHaveBeenCalledWith(jasmine.any(HTMLElement));
    });

    it('should be called when a document has been rendered', () => {
      const scrollService: AutoScrollService = fixture.debugElement.injector.get(AutoScrollService);
      spyOn(scrollService, 'scroll');
      component.onDocRendered();
      expect(scrollService.scroll).toHaveBeenCalledWith(jasmine.any(HTMLElement));
    });
  });

  describe('initialization', () => {
    it('should initialize the search worker', inject([SearchService], (searchService: SearchService) => {
      fixture.detectChanges(); // triggers ngOnInit
      expect(searchService.initWorker).toHaveBeenCalled();
      expect(searchService.loadIndex).toHaveBeenCalled();
    }));
  });

  describe('click intercepting', () => {
    it('should intercept clicks on anchors and call `location.handleAnchorClick()`',
            inject([LocationService], (location: LocationService) => {
      const anchorElement: HTMLAnchorElement = document.createElement('a');
      anchorElement.href = 'some/local/url';
      fixture.nativeElement.append(anchorElement);
      anchorElement.click();
      expect(location.handleAnchorClick).toHaveBeenCalledWith(anchorElement, 0, false, false);
    }));

    it('should intercept clicks not on the search elements and hide the search results', () => {
      const searchResults: SearchResultsComponent = fixture.debugElement.query(By.directive(SearchResultsComponent)).componentInstance;
      spyOn(searchResults, 'hideResults');
      // docViewer is a commonly-clicked, non-search element
      docViewer.click();
      expect(searchResults.hideResults).toHaveBeenCalled();
    });

    it('should not intercept clicks on any of the search elements', () => {
      const searchResults = fixture.debugElement.query(By.directive(SearchResultsComponent));
      const searchResultsComponent: SearchResultsComponent = searchResults.componentInstance;
      const searchBox = fixture.debugElement.query(By.directive(SearchBoxComponent));
      spyOn(searchResultsComponent, 'hideResults');

      searchResults.nativeElement.click();
      expect(searchResultsComponent.hideResults).not.toHaveBeenCalled();

      searchBox.nativeElement.click();
      expect(searchResultsComponent.hideResults).not.toHaveBeenCalled();
    });
  });

  describe('footer', () => {
    it('should have version number', () => {
      const versionEl: HTMLElement = fixture.debugElement.query(By.css('aio-footer')).nativeElement;
      expect(versionEl.innerText).toContain(TestHttp.versionFull);
    });
  });

});

//// test helpers ////

class TestDeviceService {
  // Show sidenav next to the main doc when display width on current device is greater than this.
  readonly sideBySideWidth = 1032;
  // Default to "wide", desktop browser.
  displayWidth = new BehaviorSubject(this.sideBySideWidth + 1);
}

class TestGaService {
  locationChanged = jasmine.createSpy('locationChanged');
}

class TestSearchService {
  initWorker = jasmine.createSpy('initWorker');
  loadIndex  = jasmine.createSpy('loadIndex');
}

class TestHttp {
  static versionFull = '4.0.0-local+sha.73808dd';

  // tslint:disable:quotemark
  navJson = {
    "TopBar": [
      {
        "url": "features",
        "title": "Features"
      }
    ],
    "SideNav": [
      {
      "title": "Core",
      "tooltip": "Learn the core capabilities of Angular",
      "children": [
          {
            "url": "guide/pipes",
            "title": "Pipes",
            "tooltip": "Pipes transform displayed values within a template."
          },
          {
            "url": "guide/bags",
            "title": "Bags",
            "tooltip": "Pack your bags for a code adventure."
          },
        ]
      },
      {
        "url": "api",
        "title": "API",
        "tooltip": "Details of the Angular classes and values."
      }
    ],
    "__versionInfo": {
      "raw": "4.0.0-rc.6",
      "major": 4,
      "minor": 0,
      "patch": 0,
      "prerelease": [
        "local"
      ],
      "build": "sha.73808dd",
      "version": "4.0.0-local",
      "codeName": "snapshot",
      "isSnapshot": true,
      "full": TestHttp.versionFull,
      "branch": "master",
      "commitSHA": "73808dd38b5ccd729404936834d1568bd066de81"
    }
  };

  apiDoc = {
    "title": "API",
    "contents": "<h1>API Doc</h1>"
  };

  pipesDoc = {
    "title": "Pipes",
    "contents": "<h1>Pipes Doc</h1>"
  };

  testDoc = {
    "title": "Test",
    "contents": "<h1>Test Doc</h1>"
  };

  fileNotFoundDoc = {
    "title": "",
    "contents": "Page not found"
  };

  // get = jasmine.createSpy('get').and.callFake((url: string) => { ... });
  get(url: string) {
    const json =
      /navigation.json/.test(url) ? this.navJson :
      /api/.test(url) ? this.apiDoc :
      /pipes/.test(url) ? this.pipesDoc :
      /file-not-found/.test(url) ? this.fileNotFoundDoc :
      this.testDoc;
    return of({ json: () => json });
  }

}