import { Directive, OnInit, ElementRef, Input } from "@angular/core";
import { PermissionService } from "../services/permission.service";
import { PermissionHelper } from "../services/permission-helper.service";

@Directive({
  selector: "[exceptPermission]",
})
export class ExceptPermissionDirective implements OnInit {
  @Input("exceptPermission") exceptPermission: Array<string> = [];
  @Input("onAuthorizedPermission") onAuthorized: Function | string = "show";
  @Input("onUnauthorizedPermission") onUnauthorized: Function | string = "hide";

  constructor(
    private _elem: ElementRef,
    private _permissionService: PermissionService,
    private _helper: PermissionHelper
  ) {}

  ngOnInit() {
    this._permissionService.permissionStoreChangeEmitter.subscribe(() => {
      this.applyPermission();
    });

    this.applyPermission();
  }

  applyPermission() {
    let hasDefined = this._permissionService.hasOneDefined(
      this.exceptPermission
    );

    if (hasDefined) {
      if (typeof this.onAuthorized === "function")
        this.onAuthorized(this._elem);
      else if (typeof this.onAuthorized === "string")
        this._helper.ApplyStrategie(this.onAuthorized, this._elem);
      else this._elem.nativeElement.style.display = "none";
    } else {
      if (typeof this.onUnauthorized === "function")
        this.onUnauthorized(this._elem);
      else if (typeof this.onUnauthorized === "string")
        this._helper.ApplyStrategie(this.onUnauthorized, this._elem);
      else this._elem.nativeElement.style.display = "";
    }
  }
}