import {async, ComponentFixture, TestBed} from '@angular/core/testing';
import { ItemType } from '../../../core/shared/item-relationships/item-type.model';
import { Relationship } from '../../../core/shared/item-relationships/relationship.model';
import {Item} from '../../../core/shared/item.model';
import {RouterStub} from '../../../shared/testing/router-stub';
import {of as observableOf} from 'rxjs';
import {NotificationsServiceStub} from '../../../shared/testing/notifications-service-stub';
import {CommonModule} from '@angular/common';
import {FormsModule} from '@angular/forms';
import {RouterTestingModule} from '@angular/router/testing';
import {TranslateModule} from '@ngx-translate/core';
import {NgbModule} from '@ng-bootstrap/ng-bootstrap';
import {ActivatedRoute, Router} from '@angular/router';
import {ItemDataService} from '../../../core/data/item-data.service';
import {NotificationsService} from '../../../shared/notifications/notifications.service';
import {CUSTOM_ELEMENTS_SCHEMA} from '@angular/core';
import {By} from '@angular/platform-browser';
import {ItemDeleteComponent} from './item-delete.component';
import {getItemEditPath} from '../../item-page-routing.module';
import {createSuccessfulRemoteDataObject} from '../../../shared/testing/utils';
import {VarDirective} from '../../../shared/utils/var.directive';
import {ObjectUpdatesService} from '../../../core/data/object-updates/object-updates.service';
import {RelationshipService} from '../../../core/data/relationship.service';
import {RelationshipType} from '../../../core/shared/item-relationships/relationship-type.model';
import {RemoteData} from '../../../core/data/remote-data';
import {PaginatedList} from '../../../core/data/paginated-list';
import {PageInfo} from '../../../core/shared/page-info.model';
import {EntityTypeService} from '../../../core/data/entity-type.service';

let comp: ItemDeleteComponent;
let fixture: ComponentFixture<ItemDeleteComponent>;

let mockItem;
let itemType;
let type1;
let type2;
let types;
let relationships;
let itemPageUrl;
let routerStub;
let mockItemDataService: ItemDataService;
let routeStub;
let objectUpdatesServiceStub;
let relationshipService;
let entityTypeService;
let notificationsServiceStub;
let typesSelection;

describe('ItemDeleteComponent', () => {
  beforeEach(async(() => {

    mockItem = Object.assign(new Item(), {
      id: 'fake-id',
      uuid: 'fake-uuid',
      handle: 'fake/handle',
      lastModified: '2018',
      isWithdrawn: true
    });

    itemType = Object.assign(new ItemType(), {
      id: 'itemType',
      uuid: 'itemType',
    });

    type1 = Object.assign(new RelationshipType(), {
      id: '1',
      uuid: 'type-1',
    });

    type2 = Object.assign(new RelationshipType(), {
      id: '2',
      uuid: 'type-2',
    });

    types = [type1, type2];

    relationships = [
      Object.assign(new Relationship(), {
        id: '1',
        uuid: 'relationship-1',
        relationshipType: observableOf(new RemoteData(
          false,
          false,
          true,
          null,
          type1
        )),
        leftItem:  observableOf(new RemoteData(
          false,
          false,
          true,
          null,
          mockItem,
        )),
        rightItem:  observableOf(new RemoteData(
          false,
          false,
          true,
          null,
          Object.assign(new Item(), {})
        )),
      }),
      Object.assign(new Relationship(), {
        id: '2',
        uuid: 'relationship-2',
        relationshipType: observableOf(new RemoteData(
          false,
          false,
          true,
          null,
          type2
        )),
        leftItem:  observableOf(new RemoteData(
          false,
          false,
          true,
          null,
          mockItem,
        )),
        rightItem:  observableOf(new RemoteData(
          false,
          false,
          true,
          null,
          Object.assign(new Item(), {})
        )),
      }),
    ];

    itemPageUrl = `fake-url/${mockItem.id}`;
    routerStub = Object.assign(new RouterStub(), {
      url: `${itemPageUrl}/edit`
    });

    mockItemDataService = jasmine.createSpyObj('mockItemDataService', {
      delete: observableOf(true)
    });

    routeStub = {
      data: observableOf({
        item: createSuccessfulRemoteDataObject(mockItem)
      })
    };

    typesSelection = {
      type1: false,
      type2: true,
    };

    entityTypeService = jasmine.createSpyObj('entityTypeService',
      {
        getEntityTypeByLabel: observableOf(new RemoteData(
          false,
          false,
          true,
          null,
          itemType,
        )),
        getEntityTypeRelationships: observableOf(new RemoteData(
          false,
          false,
          true,
          null,
          new PaginatedList(new PageInfo(), types),
        )),
      }
    );

    objectUpdatesServiceStub = {
      initialize: () => {
        // do nothing
      },
      isSelectedVirtualMetadata: (type) => observableOf(typesSelection[type]),
    };

    relationshipService = jasmine.createSpyObj('relationshipService',
      {
        getItemRelationshipsArray: observableOf(relationships),
      }
    );

    notificationsServiceStub = new NotificationsServiceStub();

    TestBed.configureTestingModule({
      imports: [CommonModule, FormsModule, RouterTestingModule.withRoutes([]), TranslateModule.forRoot(), NgbModule],
      declarations: [ItemDeleteComponent, VarDirective],
      providers: [
        { provide: ActivatedRoute, useValue: routeStub },
        { provide: Router, useValue: routerStub },
        { provide: ItemDataService, useValue: mockItemDataService },
        { provide: NotificationsService, useValue: notificationsServiceStub },
        { provide: ObjectUpdatesService, useValue: objectUpdatesServiceStub },
        { provide: RelationshipService, useValue: relationshipService },
        { provide: EntityTypeService, useValue: entityTypeService },
      ], schemas: [
        CUSTOM_ELEMENTS_SCHEMA
      ]
    }).compileComponents();
  }));

  beforeEach(() => {
    fixture = TestBed.createComponent(ItemDeleteComponent);
    comp = fixture.componentInstance;
    fixture.detectChanges();
  });

  it('should render a page with messages based on the \'delete\' messageKey', () => {
    const header = fixture.debugElement.query(By.css('h2')).nativeElement;
    expect(header.innerHTML).toContain('item.edit.delete.header');
    const description = fixture.debugElement.query(By.css('p')).nativeElement;
    expect(description.innerHTML).toContain('item.edit.delete.description');
    const confirmButton = fixture.debugElement.query(By.css('button.perform-action')).nativeElement;
    expect(confirmButton.innerHTML).toContain('item.edit.delete.confirm');
    const cancelButton = fixture.debugElement.query(By.css('button.cancel')).nativeElement;
    expect(cancelButton.innerHTML).toContain('item.edit.delete.cancel');
  });

  describe('performAction', () => {
    it('should call delete function from the ItemDataService', () => {
      spyOn(comp, 'notify');
      comp.performAction();
      expect(mockItemDataService.delete)
        .toHaveBeenCalledWith(mockItem, types.filter((type) => typesSelection[type]).map((type) => type.id));
      expect(comp.notify).toHaveBeenCalled();
    });
  });
  describe('notify', () => {
    it('should navigate to the homepage on successful deletion of the item', () => {
      comp.notify(true);
      expect(routerStub.navigate).toHaveBeenCalledWith(['']);
    });
  });
  describe('notify', () => {
    it('should navigate to the item edit page on failed deletion of the item', () => {
      comp.notify(false);
      expect(routerStub.navigate).toHaveBeenCalledWith([getItemEditPath('fake-id')]);
    });
  });
})
;