export interface SearchRequest {
  query: string;
  searchConfig: SearchConfig;
  tab?: string;
  numberOfResults?: number;
  page?: number;
}

export function request({ ... }: SearchRequest): Promise<Results> {
  // ...
  return fetch(
    "https://content-search-service.apps.pcf-p02-we.rabobank.nl/internal/omni-search",
    {
      method: "POST",
      body: JSON.stringify(requestbody),
      headers: {
        "Content-Type": "application/json",
      },
    }
  )
    ...
}

// ...
import { request, Results, SearchRequest } from "@global-sites-poc/shared/search";

@Injectable({
  providedIn: "root",
})
export class OmniSearchService {
  search$: Observable<Results>;
  private results = new Subject<Results>();

  error$: Observable<unknown>;
  private error = new Subject<unknown>();

  constructor() {
    this.search$ = this.results.asObservable();
    this.error$ = this.error.asObservable();
  }

  search(searchRequest: SearchRequest): void {
    request(searchRequest)
      .then((results) => this.results.next(results))
      .catch((error) => this.error.next(error));
  }
}

// ...
import { request, Results, SearchRequest } from "@global-sites-poc/shared/search";

function useOmniSearch(
  initialRequest: SearchRequest
): [
  (request: SearchRequest | Setter<SearchRequest>) => void,
  Results | undefined
] {
  const [searchRequest, setSearchRequest] =
    useState<SearchRequest>(initialRequest);
  const [searchResponse, setSearchResponse] = useState<Results>();

  useEffect(() => {
    if (searchRequest) {
      request(searchRequest).then(setSearchResponse);
    }
  }, [searchRequest.query]);

  return [setSearchRequest, searchResponse];
}

@Component({
  selector: "global-sites-poc-omni-search",
  templateUrl: "./omni-search.component.html",
  styleUrls: ["./omni-search.component.scss"],
})
export class OmniSearchComponent implements OnInit {
  @Input() searchConfig: SearchConfig;
  search$: Observable<Results>;

  constructor(private omniSearch: OmniSearchService) {
    this.search$ = omniSearch.search$;
  }

  ngOnInit(): void {
    this.search();
  }

  onSearch(event: CustomEvent<string>): void {
    this.search({
      query: event.detail,
    });
  }

  private search(request: Partial<SearchRequest> = {}) {
    this.omniSearch.search({
      query: "",
      searchConfig: this.searchConfig,
      numberOfResults: 4,
      ...request,
    });
  }
}

export const OmniSearchContainer: React.FunctionComponent<{ slot: string }> = ({
  slot,
}) => {
  const [search, response] = useOmniSearch({
    query: "",
    searchConfig: "rabobanknl_nl",
    numberOfResults: 4,
  });

  const onSearch = (event: CustomEvent<string>) =>
    search((request: SearchRequest) => ({
      ...request,
      query: event.detail,
    }));

  return (
    <OmniSearch
      slot={slot}
      searchResults={response?.results ?? []}
      onDoSearch={onSearch}
      pageDetailsText={"Pagina's"}
    />
  );
};

export interface Page {
    id: string;
    title: string;
    // ...
    redirect: Page_Redirect;
    view: PageView;
    regions: Page_Region[];
    // ...
}

export interface Page_Region {
    view: RegionView;
    entities: Page_Entity[];
    regions: Page_Region[];
}
export interface Page_Entity {
    type: EntityType;
    view: EntityView;
    content: any;
    id: Page_ComponentId;
    entityType: Page_Entity_Type;
}

export interface Page {
    id: string;
    title: string;
    // ...
    redirect: Page_Redirect;
    view: PageView;
    regions: Page_Region[];
    // ...
}

export interface Page_Region {
    view: RegionView;
    entities: Page_Entity[];
    regions: Page_Region[];
}
export interface Page_Entity {
    type: EntityType;
    view: EntityView;
    content: any;
    id: Page_ComponentId;
    entityType: Page_Entity_Type;
}

export const ENTITY_CONFIG: EntityConfigMap<
  // eslint-disable-next-line
  React.FunctionComponent<any> | React.LazyExoticComponent<any>
> = {
  [EntityType.GLOBALSITES__INTRO_VIDEO]: () =>
    import("../components/organisms/video-banner").then((m) => ({
      component: m.VideoBanner,
      mapper: m.mapper,
    })),
  /**
   * Configure component to type
   */
  [EntityType.GLOBALSITES__NAVIGATION]: () =>
    import("../components/organisms/app-header").then((m) => ({
      component: m.AppHeader,
      mapper: m.mapper,
    })),
  [EntityType.GLOBALSITES__FOUNDATION_PROJECTS_OVERVIEW]: {
    /**
     * Configure lazy loaded component + lazy loaded mapper to type + view
     */
    [FoundationProjectsOverviewView.FOUNDATION_PROJECTS_OVERVIEW]: () =>
      import("../components/organisms/image-tiles-block").then((m) => ({
        component: m.default,
        mapper: m.mapper,
      })),
  },
};

@Injectable({
  providedIn: "root",
})
export class CmsService {
  private readonly createPageAsync: CreatePageAsync<EntityConfig>;
  private readonly loadTemplateAsync: LoadTemplate;

  /**
   * Angular specific check to see if the template config is sync.
   */
  private static isSyncTemplateConfig(
    template: TemplateConfig
  ): template is SyncTemplateConfig {
    return !!template.prototype && !!template.prototype.constructor.name;
  }

  constructor(
    @Inject(CMS_CONFIG)
    { entityConfigMap, templateConfigMap, defaultTemplate }: CmsConfig
  ) {
    this.createPageAsync = createPageFactory<EntityConfig>(entityConfigMap);

    this.loadTemplateAsync = (view: PageView) => {
      const templateConfig = templateConfigMap[view] ?? defaultTemplate;
      return CmsService.isSyncTemplateConfig(templateConfig)
        ? Promise.resolve(templateConfig)
        : templateConfig();
    };
  }

  loadTemplate(view: PageView): Observable<EntityConfig> {
    return from(this.loadTemplateAsync(view));
  }

  createPage(page: Page): Observable<ParsedPage<EntityConfig>> {
    return from(this.createPageAsync(page));
  }
}

const createPage = createPageFactory<React.FunctionComponent>(ENTITY_CONFIG);

const DEFAULT_TEMPLATE = FoundationAboutUsTemplate;

type DynamicPage = {
  page: ParsedPage<React.FunctionComponent>;
  Template: React.FunctionComponent;
};

export function useDynamicPage(pageResponse: Page): DynamicPage | undefined {
  const [data, setData] = useState<DynamicPage>();

  useEffect(() => {
    (async () => {
      const page = await createPage(pageResponse);
      const Template = TEMPLATE_CONFIG[page.view] || DEFAULT_TEMPLATE;
      setData({ Template, page: page });
    })();
  }, [pageResponse]);

  return data;
}

@Component({
  selector: "global-sites-poc-dynamic-cms",
  templateUrl: "./dynamic-cms.component.html",
  styleUrls: ["./dynamic-cms.component.scss"],
})
export class DynamicCmsComponent implements AfterViewInit {
  @ViewChild("slots", { read: ViewContainerRef })
  slotsRef: ViewContainerRef;

  @ViewChild("template", { read: ViewContainerRef })
  templateRef: ViewContainerRef;

  constructor(private cmsService: CmsService) {}

  ngAfterViewInit() {
    forkJoin([
      this.cmsService.createPage(PAGE),
      this.cmsService.loadTemplate(PAGE.view),
    ]).subscribe(([{ regions }, template]) => {
      const {
        location: { nativeElement: templateElement },
      } = this.templateRef.createComponent(template);

      regions.forEach(({ components, view }) => {
        components.forEach(async ({ component, data }) => {
          const {
            instance,
            location: { nativeElement },
          } = this.slotsRef.createComponent(component);

          Object.keys(data).forEach((key) => (instance[key] = data[key]));

          nativeElement.slot = view;

          /**
           * DOM Hack that puts components inside the template.
           */
          nativeElement.parentElement.removeChild(nativeElement);
          templateElement.appendChild(nativeElement);
        });
      });
    });
  }
}

export const DynamicCms = () => {
  const dynamicPage = useDynamicPage(FOUNDATION_ABOUT_US_PAGE);

  if (!dynamicPage) {
    return <div>Loading</div>;
  }

  const {
    Template,
    page: { regions },
  } = dynamicPage;

  return (
    <Template>
      {regions.map(({ view, components }) =>
        components.map(({ component: Component, data }, i) => (
          <Component {...data} slot={view} key={`${view}-${i}`} />
        ))
      )}
    </Template>
  );
};