import {ChangeDetectorRef, Component, OnDestroy, OnInit} from '@angular/core';
import {ActivatedRoute, NavigationEnd, Params, Router} from '@angular/router';
import {EnvProperties} from './openaireLibrary/utils/properties/env-properties';
import {EnvironmentSpecificService} from './openaireLibrary/utils/properties/environment-specific.service';
import {Session, User} from './openaireLibrary/login/utils/helper.class';
import {UserManagementService} from "./openaireLibrary/services/user-management.service";
import {StakeholderService} from "./services/stakeholder.service";
import {BehaviorSubject, Subscriber} from "rxjs";
import {LayoutService} from "./library/sharedComponents/sidebar/layout.service";
import {MenuItem} from "./openaireLibrary/sharedComponents/menu";
import {Item} from "./utils/entities/sidebar";


@Component({
  selector: 'app-root',
  templateUrl: './app.component.html'
})
export class AppComponent implements OnInit, OnDestroy {
  properties: EnvProperties;
  user: User;
  params: BehaviorSubject<Params> = new BehaviorSubject<Params>(null);
  hasSidebar: boolean = false;
  hasHeader: boolean = false;
  userMenuItems: MenuItem[] = [];
  adminMenuItems: Item[] = [];
  private subscriptions: any[] = [];
  
  constructor(private route: ActivatedRoute,
              private propertiesService: EnvironmentSpecificService,
              private router: Router,
              private userManagementService: UserManagementService,
              private layoutService: LayoutService,
              private stakeholderService: StakeholderService,
              private cdr: ChangeDetectorRef) {
    this.subscriptions.push(this.router.events.subscribe(event => {
      if (event instanceof NavigationEnd) {
        let r = this.route;
        while (r.firstChild) {
          r = r.firstChild;
        }
        let params = r.snapshot.params;
        this.params.next(params);
      }
    }));
  }
  
  ngOnInit() {
    this.subscriptions.push(this.layoutService.hasSidebar.subscribe(hasSidebar => {
      this.hasSidebar = hasSidebar;
      this.cdr.detectChanges();
    }));
    this.subscriptions.push(this.layoutService.hasHeader.subscribe(hasHeader => {
      this.hasHeader = hasHeader;
      this.cdr.detectChanges();
    }));
    this.propertiesService.loadEnvironment()
      .then(properties => {
        this.properties = properties;
        this.subscriptions.push(this.params.subscribe( params => {
          if (params && params['stakeholder']) {
            if (!this.stakeholderService.stakeholder ||
              this.stakeholderService.stakeholder.alias !== params['stakeholder']) {
              this.stakeholderService.getStakeholder(this.properties.monitorServiceAPIURL, params['stakeholder']).subscribe(stakeholder => {
                this.stakeholderService.setStakeholder(stakeholder);
                this.layoutService.setOpen(true);
              });
            }
          } else {
            this.stakeholderService.setStakeholder(null);
          }
        }));
        this.subscriptions.push(this.userManagementService.getUserInfo(this.properties.userInfoUrl).subscribe(user => {
          this.user = user;
          this.buildMenu();
        }, error => {
          console.log("App couldn't fetch properties");
          console.log(error);
        }));
      });
  }

  public ngOnDestroy() {
    this.subscriptions.forEach(value => {
      if (value instanceof Subscriber) {
        value.unsubscribe();
      }
    });
  }

  public get open() {
    return this.layoutService.open;
  }

  public toggleOpen(event = null) {
    if (!event) {
      this.layoutService.setOpen(!this.open);
    } else if (event && event['value'] === true) {
      this.layoutService.setOpen(false);
    }
  }


  buildMenu() {
    this.userMenuItems = [];
    if (Session.isPortalAdministrator(this.user)) {
      this.userMenuItems.push(new MenuItem("", "Manage helptexts",
        ((this.properties.environment == "beta") ? "https://beta.admin.connect.openaire.eu" : "https://admin.explore.openaire.eu") + "/dashboard?communityId=openaire", "", true, [], [], {}))

    }
    if (this.user) {
      this.userMenuItems.push(new MenuItem("", "User information", "", "/user-info", false, [], [], {}));
    }
    if (this.adminMenuItems.length == 0) {
      //nstructor(id: string, name: string, route: string, items: Item[], icon, open: boolean) {
      this.adminMenuItems.push(new Item("stakeholders", "Manage Stakeholders", "/admin", [], null, false));
      this.adminMenuItems.push(new Item("pages", "Pages", "/pages", [], null, false));
      this.adminMenuItems.push(new Item("monitor", "Monitor", "/portals", [], null, false));
      this.adminMenuItems.push(new Item("entities", "Entities", "/entities", [], null, false));
      this.adminMenuItems.push(new Item("helptexts", "Help texts", "/helptexts?communityId=openaire", [], null, false));
    }
  }
}