import {Injectable} from '@angular/core';
import {ActivatedRouteSnapshot, CanActivate, Router, RouterStateSnapshot, UrlTree} from '@angular/router';
import {Observable} from 'rxjs';
import {AuthService} from '@services/auth.service';
import {environment} from '@environment';

@Injectable({
  providedIn: 'root'
})
export class AuthGuard implements CanActivate {

  constructor(
    private authService: AuthService,
    private router: Router
  ) {
  }

  canActivate(
    route: ActivatedRouteSnapshot,
    state: RouterStateSnapshot
  ): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree {
    if (environment.defaultAuthStatus) {
      return true;
    }
    if (!this.authService.checkAuthStatus()) {
      return this.router.createUrlTree(['/']);
    }

    const requiredAuthorizations = route.data['requiredAuthorizations'] as string[];

    if (!requiredAuthorizations || requiredAuthorizations.length === 0) {
      return true;
    }

    const userAuthorizations = this.authService.getUserAuthorizations();
    const hasAccess = requiredAuthorizations.some(auth => userAuthorizations.includes(auth));

    if (!hasAccess) {
      return this.router.createUrlTree(['/']);
    }

    return true;
  }
}