import {
  Component, Input, OnChanges, SimpleChanges, OnInit, ViewChild
} from '@angular/core';
import { InfraService, InfraHost, InfraZone, Infra } from '@overflow/commons-typescript/model/infra';
import { Observable, of } from 'rxjs';
import { catchError, exhaustMap, map, tap, take } from 'rxjs/operators';
import { TreeNode, MenuItem, ContextMenu } from 'primeng/primeng';
import { PageParams, Page } from '@overflow/commons-typescript/core/model';
import { ProbeHost, MetaInfraTypeEnum } from '@overflow/commons-typescript';
import { InfraService as InfraCRUDService } 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[];

  contextMenuZone: MenuItem[];
  contextMenuHost: MenuItem[];
  contextMenuService: MenuItem[];
  selectedNode: TreeNode;

  @ViewChild('cmZone') cmZone: ContextMenu;
  @ViewChild('cmHost') cmHost: ContextMenu;
  @ViewChild('cmService') cmService: ContextMenu;

  constructor(
    private infraService: InfraCRUDService,
  ) {
  }

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

  initContextMenu() {
    this.contextMenuZone = [
      { label: 'Zone Menu', command: (event) => this.cmZone.hide() },
      { separator: true },
      { label: 'Discovery', icon: 'fa-plus', command: (event) => alert('Discovery') },
    ];
    this.contextMenuHost = [
      { label: 'Host Menu', command: (event) => this.cmHost.hide() },
      { separator: true },
      { label: 'Add sensor', icon: 'fa-plus', command: (event) => alert('Add sensor') },
      { label: 'Traceroute', icon: 'fa-plus' },
      { label: 'ARP Test', icon: 'fa-plus' },
    ];
    this.contextMenuService = [
      { label: 'Service Menu', command: (event) => this.cmService.hide() },
      { separator: true },
      { label: 'Add sensor', icon: 'fa-plus', command: (event) => alert('Add sensor') },
    ];
  }

  ngOnChanges(changes: SimpleChanges): void {
    if (changes['probeHost'].isFirstChange) {
      this.zoneNode = [];
      this.hostNode = [];
      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;
          console.log(this.infras);
          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.key) {
        case MetaInfraTypeEnum.ZONE:
          this.addZone(infra);
          break;
        case MetaInfraTypeEnum.HOST:
          this.addHost(infra);
          break;
        case MetaInfraTypeEnum.HOST:
          this.addService(infra);
          break;
        default:
          break;
      }
    });
  }

  addZone(infraZone: InfraZone) {
    this.zoneNode.push({
      label: infraZone.network + '(' + infraZone.iface + ')',
      type: 'ZONE',
      data: {
        target: infraZone,
        subLabel: 'Something to display'
      },
      children: this.hostNode,
      expanded: true
    });
  }

  addHost(infraHost: InfraHost) {
    let ipAddr = infraHost.infraHostIPs[0].address.split('/')[0];
    if (infraHost.infraHostOS && infraHost.infraHostOS.name) {
      ipAddr += '(' + infraHost.infraHostOS.name + ')';
    }
    this.hostNode.push({
      type: 'HOST',
      label: ipAddr,
      data: {
        target: infraHost,
      },
      expanded: true,
      children: []
    });
  }

  addService(infraService: InfraService) {
    const idx = this.findHostIndex(infraService);
    if (idx === -1) {
      // this.addHost(infraService.infraHost);
      // this.addService(infraService);
      return;
    }
    this.hostNode[idx].children.push({
      type: 'SERVICE',
      label: 'TODO',
      data: {
        target: infraService
      },
    });
  }

  findHostIndex(infraService: InfraService): number {
    let idx = -1;
    this.hostNode.forEach((node, index) => {
      const infraHost: InfraHost = node.data.target;
      for (const infraHostIP of infraHost.infraHostIPs) {
        if (infraHostIP.id === infraService.infraHostPort.infraHostIP.id) {
          idx = index;
          return;
        }
      }
    });
    return idx;
  }


  showContextMenu(event: MouseEvent, node: any) {
    this.selectedNode = node;

    this.cmZone.hide();
    this.cmHost.hide();
    this.cmService.hide();

    if (node.type === 'ZONE') {
      this.cmZone.show(event);
    } else if (node.type === 'HOST') {
      this.cmHost.show(event);
    } else if (node.type === 'SERVICE') {
      this.cmService.show(event);
    }

    return false;
  }
}