import {
  Component, Input, OnChanges, SimpleChanges, OnInit
} from '@angular/core';
import { Infra } from '@overflow/commons-typescript/model/infra';
import { InfraHost as InfraTypeHost } from '@overflow/commons-typescript/model/infra';
import { InfraService as InfraTypeService } from '@overflow/commons-typescript/model/infra';
import { Observable, of } from 'rxjs';
import { catchError, exhaustMap, map, tap, take } from 'rxjs/operators';
import { TreeNode } from 'primeng/primeng';
import { PageParams, Page } from '@overflow/commons-typescript/core/model';
import { ProbeHost } from '@overflow/commons-typescript';
import { InfraService } from '../service/infra.service';

@Component({
  selector: 'of-infra-tree',
  templateUrl: './infra-tree.component.html',
})
export class InfraTreeComponent implements OnInit, OnChanges {

  @Input() probeHost: ProbeHost;

  infras: Infra[];
  pending$: Observable<boolean>;
  error$: Observable<any>;

  zoneNode: TreeNode[] = [];
  hostNode: TreeNode[] = [];

  constructor(
    private infraService: InfraService,
  ) {
  }

  ngOnInit(): void {
    this.zoneNode.push({
      label: this.probeHost.probe.cidr,
      type: 'ZONE',
      data: {
      },
      children: this.hostNode,
      expanded: true
    });
  }

  ngOnChanges(changes: SimpleChanges): void {
    this.getInfras();
  }

  getInfras() {
    const pageParams: PageParams = {
      pageNo: 0,
      countPerPage: 99999,
      sortCol: 'id',
      sortDirection: 'descending'
    };
    this.infraService.readAllByProbeID(this.probeHost.probe.id, pageParams)
      .pipe(
        tap(() => {
          this.pending$ = of(true);
        }),
        map((infraPage: Page<Infra>) => {
          this.infras = infraPage.content;
          this.generateTreeData(this.infras);
        }),
        catchError(error => {
          this.error$ = of(error);
          return of();
        }),
        tap(() => {
          this.pending$ = of(false);
        }),
        take(1),
    ).subscribe();
  }

  generateTreeData(infras: Infra[]) {
    infras.forEach(infra => {
      switch (infra.metaInfraType.id) { // TODO: fix to enum
        case 2: // InfraHost
          this.addHost(infra);
          break;
        case 7: // InfraService
          // this.addService(infra);
          break;
        default:
          break;
      }
    });
  }

  addHost(infraHost: InfraTypeHost) {
    this.hostNode.push({
      type: 'HOST',
      label: infraHost.ipv4,
      data: {
        target: infraHost
      },
      expanded: true,
      children: []
    });
  }

  addService(infraService: InfraTypeService) {
    this.hostNode[0].children.push({
      type: 'SERVICE',
      label: 'TODO',
      data: {
        target: infraService
      },
    });
  }
}