/**
 * 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 {Component, OnDestroy, OnInit} from '@angular/core';
import {ActivatedRoute} from '@angular/router';
import {PortfolioStore} from './store/index';
import {DELETE, ENABLE} from './store/product.actions';
import {Subscription} from 'rxjs/Subscription';
import * as fromPortfolio from './store';
import * as fromRoot from '../../store';
import {FimsProduct} from './store/model/fims-product.model';
import {FimsPermission} from '../../services/security/authz/fims-permission.model';
import {Observable} from 'rxjs/Observable';
import {TdDialogService} from '@covalent/core';

@Component({
  templateUrl: './product.detail.component.html'
})
export class ProductDetailComponent implements OnInit, OnDestroy {

  private productSubscription: Subscription;

  product: FimsProduct;

  canEdit$: Observable<boolean>;

  canDelete$: Observable<boolean>;

  constructor(private route: ActivatedRoute, private portfolioStore: PortfolioStore, private dialogService: TdDialogService) {}

  ngOnInit(): void {
    const product$: Observable<FimsProduct> = this.portfolioStore.select(fromPortfolio.getSelectedProduct)
      .filter(product => !!product);

    this.productSubscription = product$
      .subscribe(product => this.product = product);

    const permissions$ = this.portfolioStore.select(fromRoot.getPermissions);

    this.canEdit$ = Observable.combineLatest(
      permissions$,
      product$,
      (permissions, product) => ({
        hasPermission: this.hasChangePermission(permissions),
        isEnabled: product.enabled
      }))
      .map(result => result.hasPermission && !result.isEnabled);

    this.canDelete$ = Observable.combineLatest(
      permissions$,
      product$,
      (permissions, product) => ({
        hasPermission: this.hasDeletePermission(permissions),
        isEnabled: product.enabled
      }))
      .map(result => result.hasPermission && !result.isEnabled);
  }

  ngOnDestroy(): void {
    this.productSubscription.unsubscribe();
  }

  enableProduct(): void {
    this.portfolioStore.dispatch({ type: ENABLE, payload: {
      product: this.product,
      enable: true
    } });
  }

  disableProduct(): void {
    this.portfolioStore.dispatch({ type: ENABLE, payload: {
      product: this.product,
      enable: false
    } });
  }

  confirmDeletion(): Observable<boolean> {
    return this.dialogService.openConfirm({
      message: 'Do you want to delete this product?',
      title: 'Confirm deletion',
      acceptButton: 'DELETE PRODUCT',
    }).afterClosed();
  }

  deleteProduct(): void {
    this.confirmDeletion()
      .filter(accept => accept)
      .subscribe(() => this.portfolioStore.dispatch({
        type: DELETE, payload: {
          product: this.product,
          activatedRoute: this.route
        }
      }));
  }

  get numberFormat(): string {
    let digits = 2;
    if (this.product) {
      digits = this.product.minorCurrencyUnitDigits;
    }
    return `1.${digits}-${digits}`;
  }

  private hasChangePermission(permissions: FimsPermission[]): boolean {
    return permissions.filter(permission =>
        permission.id === 'portfolio_products' &&
        permission.accessLevel === 'CHANGE'
      ).length > 0;
  }

  private hasDeletePermission(permissions: FimsPermission[]): boolean {
    return permissions.filter(permission =>
        permission.id === 'portfolio_products' &&
        permission.accessLevel === 'DELETE'
      ).length > 0;
  }

}