import { ComponentFixture, TestBed, waitForAsync } from '@angular/core/testing';
import { AuthService } from '../../core/auth/auth.service';
import { of as observableOf } from 'rxjs';
import { Bitstream } from '../../core/shared/bitstream.model';
import { AuthorizationDataService } from '../../core/data/feature-authorization/authorization-data.service';
import {
  createFailedRemoteDataObject$,
  createSuccessfulRemoteDataObject,
  createSuccessfulRemoteDataObject$
} from '../remote-data.utils';
import { ActivatedRoute, Router } from '@angular/router';
import { TranslateModule } from '@ngx-translate/core';
import { CommonModule } from '@angular/common';
import { BitstreamRequestACopyPageComponent } from './bitstream-request-a-copy-page.component';
import { By } from '@angular/platform-browser';
import { RouterStub } from '../testing/router.stub';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { NotificationsServiceStub } from '../testing/notifications-service.stub';
import { ItemRequestDataService } from '../../core/data/item-request-data.service';
import { NotificationsService } from '../notifications/notifications.service';
import { DSONameService } from '../../core/breadcrumbs/dso-name.service';
import { DSONameServiceMock } from '../mocks/dso-name.service.mock';
import { Item } from '../../core/shared/item.model';
import { EPerson } from '../../core/eperson/models/eperson.model';
import { ItemRequest } from '../../core/shared/item-request.model';
import { Location } from '@angular/common';
import { BitstreamDataService } from '../../core/data/bitstream-data.service';


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

  let authService: AuthService;
  let authorizationService: AuthorizationDataService;
  let activatedRoute;
  let router;
  let itemRequestDataService;
  let notificationsService;
  let location;
  let bitstreamDataService;

  let item: Item;
  let bitstream: Bitstream;
  let eperson;

  function init() {
    eperson = Object.assign(new EPerson(), {
      email: 'test@mail.org',
      metadata: {
        'eperson.firstname': [{value: 'Test'}],
        'eperson.lastname': [{value: 'User'}],
      }
    });
    authService = jasmine.createSpyObj('authService', {
      isAuthenticated: observableOf(false),
      getAuthenticatedUserFromStore: observableOf(eperson)
    });
    authorizationService = jasmine.createSpyObj('authorizationSerivice', {
      isAuthorized: observableOf(true)
    });

    itemRequestDataService = jasmine.createSpyObj('itemRequestDataService', {
      requestACopy: createSuccessfulRemoteDataObject$({})
    });

    location = jasmine.createSpyObj('location', {
      back: {}
    });

    notificationsService = new NotificationsServiceStub();

    item = Object.assign(new Item(), {uuid: 'item-uuid'});

    bitstream = Object.assign(new Bitstream(), {
      uuid: 'bitstreamUuid',
      _links: {
        content: {href: 'bitstream-content-link'},
        self: {href: 'bitstream-self-link'},
      }
    });

    activatedRoute = {
      data: observableOf({
        dso: createSuccessfulRemoteDataObject(
          item
        )
      }),
      queryParams: observableOf({
        bitstream : bitstream.uuid
      })
    };

    bitstreamDataService = jasmine.createSpyObj('bitstreamDataService', {
      findById: createSuccessfulRemoteDataObject$(bitstream)
    });

    router = new RouterStub();
  }

  function initTestbed() {
    TestBed.configureTestingModule({
      imports: [CommonModule, TranslateModule.forRoot(), FormsModule, ReactiveFormsModule],
      declarations: [BitstreamRequestACopyPageComponent],
      providers: [
        {provide: Location, useValue: location},
        {provide: ActivatedRoute, useValue: activatedRoute},
        {provide: Router, useValue: router},
        {provide: AuthorizationDataService, useValue: authorizationService},
        {provide: AuthService, useValue: authService},
        {provide: ItemRequestDataService, useValue: itemRequestDataService},
        {provide: NotificationsService, useValue: notificationsService},
        {provide: DSONameService, useValue: new DSONameServiceMock()},
        {provide: BitstreamDataService, useValue: bitstreamDataService},
      ]
    })
      .compileComponents();
  }

  describe('init', () => {
    beforeEach(waitForAsync(() => {
      init();
      initTestbed();
    }));
    beforeEach(() => {
      fixture = TestBed.createComponent(BitstreamRequestACopyPageComponent);
      component = fixture.componentInstance;
      fixture.detectChanges();
    });
    it('should init the comp', () => {
      expect(component).toBeTruthy();
    });
  });

  describe('should show a form to request a copy', () => {
    describe('when the user is not logged in', () => {
      beforeEach(waitForAsync(() => {
        init();
        initTestbed();
      }));
      beforeEach(() => {
        fixture = TestBed.createComponent(BitstreamRequestACopyPageComponent);
        component = fixture.componentInstance;
        fixture.detectChanges();
      });
      it('show the form with no values filled in based on the user', () => {
        expect(component.name.value).toEqual('');
        expect(component.email.value).toEqual('');
        expect(component.allfiles.value).toEqual('false');
        expect(component.message.value).toEqual('');
      });
    });

    describe('when the user is logged in', () => {
      beforeEach(waitForAsync(() => {
        init();
        (authService.isAuthenticated as jasmine.Spy).and.returnValue(observableOf(true));
        initTestbed();
      }));
      beforeEach(() => {
        fixture = TestBed.createComponent(BitstreamRequestACopyPageComponent);
        component = fixture.componentInstance;
        fixture.detectChanges();
      });
      it('show the form with values filled in based on the user', () => {
        fixture.detectChanges();
        expect(component.name.value).toEqual(eperson.name);
        expect(component.email.value).toEqual(eperson.email);
        expect(component.allfiles.value).toEqual('false');
        expect(component.message.value).toEqual('');
      });
    });
    describe('when no bitstream was provided', () => {
      beforeEach(waitForAsync(() => {
        init();
        activatedRoute = {
          data: observableOf({
            dso: createSuccessfulRemoteDataObject(
              item
            )
          }),
          queryParams: observableOf({
          })
        };
        initTestbed();
      }));
      beforeEach(() => {
        fixture = TestBed.createComponent(BitstreamRequestACopyPageComponent);
        component = fixture.componentInstance;
        fixture.detectChanges();
      });
      it('should set the all files value to true and disable the false value', () => {
        expect(component.name.value).toEqual('');
        expect(component.email.value).toEqual('');
        expect(component.allfiles.value).toEqual('true');
        expect(component.message.value).toEqual('');

        const allFilesFalse = fixture.debugElement.query(By.css('#allfiles-false')).nativeElement;
        expect(allFilesFalse.getAttribute('disabled')).toBeTruthy();

      });
    });
    describe('when the user has authorization to download the file', () => {
      beforeEach(waitForAsync(() => {
        init();
        (authService.isAuthenticated as jasmine.Spy).and.returnValue(observableOf(true));
        initTestbed();
      }));
      beforeEach(() => {
        fixture = TestBed.createComponent(BitstreamRequestACopyPageComponent);
        component = fixture.componentInstance;
        fixture.detectChanges();
      });
      it('should show an alert indicating the user can download the file', () => {
        const alert = fixture.debugElement.query(By.css('.alert')).nativeElement;
        expect(alert.innerHTML).toContain('bitstream-request-a-copy.alert.canDownload');
      });
    });
  });

  describe('onSubmit', () => {
    describe('onSuccess', () => {
      beforeEach(waitForAsync(() => {
        init();
        initTestbed();
      }));
      beforeEach(() => {
        fixture = TestBed.createComponent(BitstreamRequestACopyPageComponent);
        component = fixture.componentInstance;
        fixture.detectChanges();
      });
      it('should take the current form information and submit it', () => {
        component.name.patchValue('User Name');
        component.email.patchValue('user@name.org');
        component.allfiles.patchValue('false');
        component.message.patchValue('I would like to request a copy');

        component.onSubmit();
        const itemRequest = Object.assign(new ItemRequest(),
          {
            itemId: item.uuid,
            bitstreamId: bitstream.uuid,
            allfiles: 'false',
            requestEmail: 'user@name.org',
            requestName: 'User Name',
            requestMessage: 'I would like to request a copy'
          });

        expect(itemRequestDataService.requestACopy).toHaveBeenCalledWith(itemRequest);
        expect(notificationsService.success).toHaveBeenCalled();
        expect(location.back).toHaveBeenCalled();
      });
    });

    describe('onFail', () => {
      beforeEach(waitForAsync(() => {
        init();
        (itemRequestDataService.requestACopy as jasmine.Spy).and.returnValue(createFailedRemoteDataObject$());
        initTestbed();
      }));
      beforeEach(() => {
        fixture = TestBed.createComponent(BitstreamRequestACopyPageComponent);
        component = fixture.componentInstance;
        fixture.detectChanges();
      });
      it('should take the current form information and submit it', () => {
        component.name.patchValue('User Name');
        component.email.patchValue('user@name.org');
        component.allfiles.patchValue('false');
        component.message.patchValue('I would like to request a copy');

        component.onSubmit();
        const itemRequest = Object.assign(new ItemRequest(),
          {
            itemId: item.uuid,
            bitstreamId: bitstream.uuid,
            allfiles: 'false',
            requestEmail: 'user@name.org',
            requestName: 'User Name',
            requestMessage: 'I would like to request a copy'
          });

        expect(itemRequestDataService.requestACopy).toHaveBeenCalledWith(itemRequest);
        expect(notificationsService.error).toHaveBeenCalled();
        expect(location.back).not.toHaveBeenCalled();
      });
    });
  });
});