import { cold, getTestScheduler } from 'jasmine-marbles';
import { TestScheduler } from 'rxjs/testing';
import { followLink } from '../../shared/utils/follow-link-config.model';
import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
import { ObjectCacheService } from '../cache/object-cache.service';
import { HALEndpointService } from '../shared/hal-endpoint.service';
import { DsoRedirectService } from './dso-redirect.service';
import { GetRequest, IdentifierType } from './request.models';
import { RequestService } from './request.service';
import { createSuccessfulRemoteDataObject } from '../../shared/remote-data.utils';
import { Item } from '../shared/item.model';
import { EMBED_SEPARATOR } from './base/base-data.service';
import { HardRedirectService } from '../services/hard-redirect.service';
import { environment } from '../../../environments/environment.test';
import { AppConfig } from '../../../config/app-config.interface';

describe('DsoRedirectService', () => {
  let scheduler: TestScheduler;
  let service: DsoRedirectService;
  let halService: HALEndpointService;
  let requestService: RequestService;
  let rdbService: RemoteDataBuildService;
  let redirectService: HardRedirectService;
  let remoteData;
  const dsoUUID = '9b4f22f4-164a-49db-8817-3316b6ee5746';
  const dsoHandle = '1234567789/22';
  const encodedHandle = encodeURIComponent(dsoHandle);
  const pidLink = 'https://rest.api/rest/api/pid/find{?id}';
  const requestHandleURL = `https://rest.api/rest/api/pid/find?id=${encodedHandle}`;
  const requestUUIDURL = `https://rest.api/rest/api/pid/find?id=${dsoUUID}`;
  const requestUUID = '34cfed7c-f597-49ef-9cbe-ea351f0023c2';
  const objectCache = {} as ObjectCacheService;

  beforeEach(() => {
    scheduler = getTestScheduler();

    halService = jasmine.createSpyObj('halService', {
      getEndpoint: cold('a', { a: pidLink })
    });
    requestService = jasmine.createSpyObj('requestService', {
      generateRequestId: requestUUID,
      send: true
    });

    remoteData = createSuccessfulRemoteDataObject(Object.assign(new Item(), {
      type: 'item',
      uuid: '123456789'
    }));

    rdbService = jasmine.createSpyObj('rdbService', {
      buildSingle: cold('a', {
        a: remoteData
      })
    });

    redirectService = jasmine.createSpyObj('redirectService', {
      redirect: {}
    });

    service = new DsoRedirectService(
      environment as AppConfig,
      requestService,
      rdbService,
      objectCache,
      halService,
      redirectService
    );
  });

  describe('findByIdAndIDType', () => {
    it('should call HALEndpointService with the path to the pid endpoint', () => {
      scheduler.schedule(() => service.findByIdAndIDType(dsoHandle, IdentifierType.HANDLE));
      scheduler.flush();

      expect(halService.getEndpoint).toHaveBeenCalledWith('pid');
    });

    it('should call HALEndpointService with the path to the dso endpoint', () => {
      scheduler.schedule(() => service.findByIdAndIDType(dsoUUID, IdentifierType.UUID));
      scheduler.flush();

      expect(halService.getEndpoint).toHaveBeenCalledWith('dso');
    });

    it('should call HALEndpointService with the path to the dso endpoint when identifier type not specified', () => {
      scheduler.schedule(() => service.findByIdAndIDType(dsoUUID));
      scheduler.flush();

      expect(halService.getEndpoint).toHaveBeenCalledWith('dso');
    });

    it('should send the proper FindByIDRequest for uuid', () => {
      scheduler.schedule(() => service.findByIdAndIDType(dsoUUID, IdentifierType.UUID));
      scheduler.flush();

      expect(requestService.send).toHaveBeenCalledWith(new GetRequest(requestUUID, requestUUIDURL), true);
    });

    it('should send the proper FindByIDRequest for handle', () => {
      scheduler.schedule(() => service.findByIdAndIDType(dsoHandle, IdentifierType.HANDLE));
      scheduler.flush();

      expect(requestService.send).toHaveBeenCalledWith(new GetRequest(requestUUID, requestHandleURL), true);
    });

    it('should navigate to item route', () => {
      remoteData.payload.type = 'item';
      const redir = service.findByIdAndIDType(dsoHandle, IdentifierType.HANDLE);
      // The framework would normally subscribe but do it here so we can test navigation.
      redir.subscribe();
      scheduler.schedule(() => redir);
      scheduler.flush();
      expect(redirectService.redirect).toHaveBeenCalledWith(`${environment.ui.nameSpace}/items/${remoteData.payload.uuid}`, 301);
    });
    it('should navigate to entities route with the corresponding entity type', () => {
      remoteData.payload.type = 'item';
      remoteData.payload.metadata = {
        'dspace.entity.type': [
          {
            language: 'en_US',
            value: 'Publication'
          }
        ],
      };
      const redir = service.findByIdAndIDType(dsoHandle, IdentifierType.HANDLE);
      // The framework would normally subscribe but do it here so we can test navigation.
      redir.subscribe();
      scheduler.schedule(() => redir);
      scheduler.flush();
      expect(redirectService.redirect).toHaveBeenCalledWith(`${environment.ui.nameSpace}/entities/publication/${remoteData.payload.uuid}`, 301);
    });

    it('should navigate to collections route', () => {
      remoteData.payload.type = 'collection';
      const redir = service.findByIdAndIDType(dsoHandle, IdentifierType.HANDLE);
      redir.subscribe();
      scheduler.schedule(() => redir);
      scheduler.flush();
      expect(redirectService.redirect).toHaveBeenCalledWith(`${environment.ui.nameSpace}/collections/${remoteData.payload.uuid}`, 301);
    });

    it('should navigate to communities route', () => {
      remoteData.payload.type = 'community';
      const redir = service.findByIdAndIDType(dsoHandle, IdentifierType.HANDLE);
      redir.subscribe();
      scheduler.schedule(() => redir);
      scheduler.flush();
      expect(redirectService.redirect).toHaveBeenCalledWith(`${environment.ui.nameSpace}/communities/${remoteData.payload.uuid}`, 301);
    });
  });

  describe('DataService', () => {  // todo: should only test the id/uuid interpolation thingy
    describe('getIDHref', () => {  // todo: should be able to move this up to IdentifiableDataService?
      it('should return endpoint', () => {
        const result = (service as any).dataService.getIDHref(pidLink, dsoUUID);
        expect(result).toEqual(requestUUIDURL);
      });

      it('should include single linksToFollow as embed', () => {
        const expected = `${requestUUIDURL}&embed=bundles`;
        const result = (service as any).dataService.getIDHref(pidLink, dsoUUID, followLink('bundles'));
        expect(result).toEqual(expected);
      });

      it('should include multiple linksToFollow as embed', () => {
        const expected = `${requestUUIDURL}&embed=bundles&embed=owningCollection&embed=templateItemOf`;
        const result = (service as any).dataService.getIDHref(pidLink, dsoUUID, followLink('bundles'), followLink('owningCollection'), followLink('templateItemOf'));
        expect(result).toEqual(expected);
      });

      it('should not include linksToFollow with shouldEmbed = false', () => {
        const expected = `${requestUUIDURL}&embed=templateItemOf`;
        const result = (service as any).dataService.getIDHref(
          pidLink,
          dsoUUID,
          followLink('bundles', { shouldEmbed: false }),
          followLink('owningCollection', { shouldEmbed: false }),
          followLink('templateItemOf'),
        );
        expect(result).toEqual(expected);
      });

      it('should include nested linksToFollow 3lvl', () => {
        const expected = `${requestUUIDURL}&embed=owningCollection${EMBED_SEPARATOR}itemtemplate${EMBED_SEPARATOR}relationships`;
        const result = (service as any).dataService.getIDHref(
          pidLink,
          dsoUUID,
          followLink(
            'owningCollection',
            {},
            followLink(
              'itemtemplate',
              {},
              followLink('relationships'),
            ),
          ),
        );
        expect(result).toEqual(expected);
      });
    });
  });
});
