import {Injectable} from "@angular/core";
import {Router, CanActivate, ActivatedRouteSnapshot, ActivatedRoute} from "@angular/router";
import {User} from "../_models/user";
import {UsersService} from "../_services/users.service";
import {NavigationSharedService} from "../_services/navigation.shared.service";
import {PathPermission} from "../_models/path.permission";

@Injectable()
export class AuthGuard implements CanActivate {
  pathPermissionMap: PathPermission[];
  currentUser: User;

  constructor(private router: Router,
              private route: ActivatedRoute,
              private userService: UsersService,
              public navigationSharedService: NavigationSharedService) {

    this.pathPermissionMap = [];
    this.currentUser = UsersService.getLoggedInUser() ? UsersService.getLoggedInUser() : this.authenticate();
    this.pathPermissionMap.push(new PathPermission('valiskasutaja-vordlus-esindaja', 'permissions.uc8.comparison.external', 'EXTERNAL_USER'));
    this.pathPermissionMap.push(new PathPermission('valiskasutaja-vordlus-esindaja', 'permissions.uc8.comparison.official.external', 'INTERNAL'));
    this.pathPermissionMap.push(new PathPermission('paketid', 'permissions.uc4.packagelist.view', null));
    this.pathPermissionMap.push(new PathPermission('paketid-lisa', 'permissions.uc4.packagelist.insert', null));
    this.pathPermissionMap.push(new PathPermission('paketid-muuda', 'permissions.uc4.packagelist.view', null));
    this.pathPermissionMap.push(new PathPermission('paasuoigus-loobu', 'permissions.uc20.accesspermission.discard', 'INTERNAL'));
    this.pathPermissionMap.push(new PathPermission('paasuoigus-muuda', 'permissions.uc3.accesspermission.update', null));
    this.pathPermissionMap.push(new PathPermission('paasuoigus-lisa', 'permissions.uc3.accesspermission.insert', null));
    this.pathPermissionMap.push(new PathPermission('valiskasutaja-paasuoigused', 'permissions.uc24.externaluser', null));
    this.pathPermissionMap.push(new PathPermission('valiskasutaja-nimele-antud', 'permissions.uc24.externaluser', null));
    this.pathPermissionMap.push(new PathPermission('valisametniku-paasuoigused', 'permissions.uc26.externalofficial', null));
    this.pathPermissionMap.push(new PathPermission('valisametniku-nimele-antud', 'permissions.uc26.externalofficial', null));
    this.pathPermissionMap.push(new PathPermission('profiilid-nimekiri', 'permissions.uc23.profilelist.view', null));
    this.pathPermissionMap.push(new PathPermission('profiilid-vaatamine-muutmine', 'permissions.uc23.profilelist.edit', null));
    this.pathPermissionMap.push(new PathPermission('ametnik-vordlus-valik', 'permissions.uc8.comparison.official.official', null));
    this.pathPermissionMap.push(new PathPermission('valiskasutaja-vordlus-esindatav', 'permissions.uc8.comparison.official.external', null));
    this.pathPermissionMap.push(new PathPermission('isiku-nimele-antud', 'permissions.uc2.principalaccesspermissions.view', null));
    this.pathPermissionMap.push(new PathPermission('mulle-esitatud-taotlused', 'permissions.uc32.applications', null));
    this.pathPermissionMap.push(new PathPermission('minu-tehtud-taotlused', 'permissions.uc31.applications', null));
    this.pathPermissionMap.push(new PathPermission('sobralist', 'permissions.uc28.favourites', null));
    this.pathPermissionMap.push(new PathPermission('ametniku-paasuoigused', 'permissions.uc25.official', null));
    this.pathPermissionMap.push(new PathPermission('ametniku-nimele-antud', 'permissions.uc25.official', null));
    this.pathPermissionMap.push(new PathPermission('keskne-logi', 'permissions.uc37.accesspermission.view.central.log', null));
    this.pathPermissionMap.push(new PathPermission('keskne-logi-esindajad', 'permissions.uc18.accesspermission.view.representatives.central.log', null));

  }

  checkPermissions(route: ActivatedRouteSnapshot) {
    if(this.currentUser) {
      let loaderName = 'hasPermission_' + (new Date()).getTime() / 1000;
      this.navigationSharedService.startLoading(loaderName);
      if (this.currentUser.jwt == null) {
        this.navigationSharedService.stopLoading(loaderName);
        console.log("soustin")
        this.router.navigate(['']);
        return false;
      } else {
        for (let pathPermission of this.pathPermissionMap) {
          if (route.routeConfig.path === pathPermission.path) {
            let doCheck: boolean = false;
            if (pathPermission.checkOnlyForUserType === 'INTERNAL' && this.currentUser.userType === 'INTERNAL') {
              doCheck = true;
            } else if (pathPermission.checkOnlyForUserType === 'EXTERNAL_USER' && this.currentUser.userType === 'EXTERNAL_USER') {
              doCheck = true;
            } else if (pathPermission.checkOnlyForUserType === 'EXTERNAL_OFFICIAL' && this.currentUser.userType === 'EXTERNAL_OFFICIAL') {
              doCheck = true;
            } else if (pathPermission.checkOnlyForUserType == null) {
              doCheck = true;
            }

            if (doCheck) {
              return this.userService.hasPermission(pathPermission.permission).then(result => {
                this.navigationSharedService.stopLoading(loaderName);
                return true;
              }).catch((err: any) => {
                this.navigationSharedService.stopLoading(loaderName);
                this.router.navigate(['/oigused-puuduvad'], {relativeTo: this.route, replaceUrl: true});
                return false;
              });
            }
          }
        }

      }

      this.navigationSharedService.stopLoading(loaderName);
      return true;
    }
  }

  canActivate(route: ActivatedRouteSnapshot)  {
    return this.checkPermissions(route);
  }

  authenticate(){
    let userPreferences = this.navigationSharedService.getUserPreferences();
    let accessToken = (<any>window).accessToken;
    let role = (<any>window).role;
    let sessionId = (<any>window).sessionId;

   return new User(this.userService.getCurrentUser(accessToken, role, sessionId, "0", "0", userPreferences.languageIso639_2).then(user => {
      this.currentUser = user;
      return this.currentUser;
    }));

  }
}