/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
import {Injectable} from '@angular/core';
import {PortfolioService} from '../../../../services/portfolio/portfolio.service';
import {Action} from '@ngrx/store';
import {Observable} from 'rxjs/Observable';
import {Actions, Effect} from '@ngrx/effects';
import * as productActions from '../product.actions';
import {of} from 'rxjs/observable/of';
import {mapToFimsProducts, mapToProduct} from '../model/fims-product.mapper';
import {emptySearchResult} from '../../../../common/store/search.reducer';

@Injectable()
export class ProductApiEffects {

  @Effect()
  search$: Observable<Action> = this.actions$
    .ofType(productActions.SEARCH)
    .map((action: productActions.SelectAction) => action.payload)
    .debounceTime(300)
    .switchMap(fetchRequest => {
      const nextSearch$ = this.actions$.ofType(productActions.SEARCH).skip(1);

      return this.portfolioService.findAllProducts(true, fetchRequest)
        .takeUntil(nextSearch$)
        .map(productPage => new productActions.SearchCompleteAction({
          elements: mapToFimsProducts(productPage.elements),
          totalElements: productPage.totalElements,
          totalPages: productPage.totalPages
        }))
        .catch(() => of(new productActions.SearchCompleteAction(emptySearchResult())));
    });

  @Effect()
  createProduct$: Observable<Action> = this.actions$
    .ofType(productActions.CREATE)
    .map((action: productActions.CreateProductAction) => action.payload)
    .mergeMap(payload =>
      this.portfolioService.createProduct(mapToProduct(payload.product))
        .map(() => new productActions.CreateProductSuccessAction({
          resource: payload.product,
          activatedRoute: payload.activatedRoute
        }))
        .catch((error) => of(new productActions.CreateProductFailAction(error)))
    );

  @Effect()
  updateProduct$: Observable<Action> = this.actions$
    .ofType(productActions.UPDATE)
    .map((action: productActions.UpdateProductAction) => action.payload)
    .mergeMap(payload =>
      this.portfolioService.changeProduct(mapToProduct(payload.product))
        .map(() => new productActions.UpdateProductSuccessAction({
          resource: payload.product,
          activatedRoute: payload.activatedRoute
        }))
        .catch((error) => of(new productActions.UpdateProductFailAction(error)))
    );

  @Effect()
  deleteProduct$: Observable<Action> = this.actions$
    .ofType(productActions.DELETE)
    .map((action: productActions.DeleteProductAction) => action.payload)
    .mergeMap(payload =>
      this.portfolioService.deleteProduct(payload.product.identifier)
        .map(() => new productActions.DeleteProductSuccessAction({
          resource: payload.product,
          activatedRoute: payload.activatedRoute
        }))
        .catch((error) => of(new productActions.DeleteProductFailAction(error)))
    );

  @Effect()
  enableProduct$: Observable<Action> = this.actions$
    .ofType(productActions.ENABLE)
    .map((action: productActions.EnableProductAction) => action.payload)
    .mergeMap(payload =>
      this.portfolioService.enableProduct(payload.product.identifier, payload.enable)
        .map(() => new productActions.EnableProductSuccessAction(payload))
        .catch((error) =>
          this.portfolioService.incompleteaccountassignments(payload.product.identifier)
            .map(accountAssignments => new productActions.EnableProductFailAction(accountAssignments)))
    );

  constructor(private actions$: Actions, private portfolioService: PortfolioService) { }
}