import {Component, ViewChild, OnInit, ElementRef} from '@angular/core';
import {ActivatedRoute, Router} from '@angular/router';
import {HelpContentService} from '../../services/help-content.service';
import {FormBuilder, FormControl, FormGroup, Validators} from '@angular/forms';
import {CheckEntity, Entity} from '../../utils/entities/adminTool/entity';
import {Portal} from '../../utils/entities/adminTool/portal';
import {EnvProperties} from '../../utils/properties/env-properties';
import {Session} from '../../login/utils/helper.class';
import {LoginErrorCodes} from '../../login/utils/guardHelper.class';
import {HelperFunctions} from "../../utils/HelperFunctions.class";
import {UserManagementService} from '../../services/user-management.service';
import {Subscriber} from "rxjs";
import {properties} from "../../../../environments/environment";
import {ConnectHelper} from "../../connect/connectHelper";

@Component({
  selector: 'entities',
  templateUrl: './entities.component.html',
})

export class EntitiesComponent implements OnInit {
  
  @ViewChild('AlertModalSaveEntity') alertModalSaveEntity;
  @ViewChild('AlertModalDeleteEntities') alertModalDeleteEntities;
  private selectedEntities: string[] = [];
  
  public checkboxes: CheckEntity[] = [];
  
  public entities: Entity[] = [];
  
  public myForm: FormGroup;
  
  private searchText: RegExp = new RegExp('');
  public keyword = '';
  
  public communities: Portal[] = [];
  public portal: string;
  
  @ViewChild('AlertModalRelatedPages') alertModalRelatedPages;
  
  public toggleIds: string[];
  public toggleStatus: boolean;
  public properties: EnvProperties = properties;
  
  public showLoading = true;
  public errorMessage = '';
  public updateErrorMessage = '';
  public modalErrorMessage = '';
  public isPortalAdministrator = null;
  public filterForm: FormGroup;
  private subscriptions: any[] = [];
  
  constructor(private element: ElementRef, private route: ActivatedRoute,
              private _router: Router,
              private _helpContentService: HelpContentService,
              private userManagementService: UserManagementService, private _fb: FormBuilder) {
  }
  
  ngOnInit() {
    this.filterForm = this._fb.group({
      keyword: [''],
      status: ['all', Validators.required]
    });
    
    this.myForm = this._fb.group({
      pid: ['', Validators.required],
      name: ['', Validators.required],
      isEnabled: '',
      _id: ''
    });
    this.subscriptions.push(this.filterForm.get('keyword').valueChanges.subscribe(value => {
      this.filterBySearch(value);
    }));
    this.subscriptions.push(this.filterForm.get('status').valueChanges.subscribe(value => {
      this.applyStatusFilter();
    }));
    this.userManagementService.getUserInfo().subscribe(user => {
      this.portal = (this.route.snapshot.data.portal) ? this.route.snapshot.data.portal : this.route.snapshot.params[this.route.snapshot.data.param];
      if(this.portal === 'connect' || this.portal === 'explore') {
        ConnectHelper.setPortalTypeFromPid(this.portal);
      }
      this.applyPortalFilter(this.portal);
      this.isPortalAdministrator = Session.isPortalAdministrator(user) && !this.portal;
    });
    
    
  }
  
  ngOnDestroy(): void {
    this.subscriptions.forEach(value => {
      if (value instanceof Subscriber) {
        value.unsubscribe();
      } else if (value instanceof Function) {
        value();
      }
    });
  }
  
  getEntities(portal: string) {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'],
        {queryParams: {'errorCode': LoginErrorCodes.NOT_VALID, 'redirectUrl': this._router.url}});
    } else {
      this.showLoading = true;
      this.updateErrorMessage = '';
      this.errorMessage = '';
      if (portal) {
        this._helpContentService.getCommunityEntities(portal, this.properties.adminToolsAPIURL).subscribe(
          entities => {
            this.entities = entities;
            this.checkboxes = [];
            
            let self = this;
            entities.forEach(_ => {
              self.checkboxes.push(<CheckEntity>{entity: _, checked: false});
            });
            
            this.showLoading = false;
          },
          error => this.handleError('System error retrieving entities', error));
      } else {
        this._helpContentService.getEntities(this.properties.adminToolsAPIURL).subscribe(
          entities => {
            this.entities = entities;
            this.checkboxes = [];
            
            let self = this;
            entities.forEach(_ => {
              self.checkboxes.push(<CheckEntity>{entity: _, checked: false});
            });
            this.showLoading = false;
          },
          error => this.handleError('System error retrieving entities', error));
      }
    }
  }
  
  public toggleCheckBoxes(event) {
    this.checkboxes.forEach(_ => _.checked = event.target.checked);
  }
  
  public applyCheck(flag: boolean) {
    this.checkboxes.forEach(_ => _.checked = flag);
  }
  
  public getSelectedEntities(): string[] {
    return this.checkboxes.filter(entity => entity.checked === true).map(checkedEntity => checkedEntity.entity).map(res => res._id);
  }
  
  private deleteEntitiesFromArray(ids: string[]): void {
    for (let id of ids) {
      const i = this.checkboxes.findIndex(_ => _.entity._id === id);
      this.checkboxes.splice(i, 1);
    }
  }
  
  public confirmDeleteEntity(id: string) {
    // this.deleteConfirmationModal.ids = [id];
    // this.deleteConfirmationModal.showModal();
    this.selectedEntities = [id];
    this.confirmDeleteEntitiesModalOpen();
  }
  
  public confirmDeleteSelectedEntities() {
    // this.deleteConfirmationModal.ids = this.getSelectedEntities();
    // this.deleteConfirmationModal.showModal();
    this.selectedEntities = this.getSelectedEntities();
    this.confirmDeleteEntitiesModalOpen();
  }
  
  private confirmDeleteEntitiesModalOpen() {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'],
        {queryParams: {'errorCode': LoginErrorCodes.NOT_VALID, 'redirectUrl': this._router.url}});
    } else {
      this.alertModalDeleteEntities.cancelButton = true;
      this.alertModalDeleteEntities.okButton = true;
      this.alertModalDeleteEntities.alertTitle = 'Delete Confirmation';
      this.alertModalDeleteEntities.message = 'Are you sure you want to delete the selected entity(-ies)?';
      this.alertModalDeleteEntities.okButtonText = 'Yes';
      this.alertModalDeleteEntities.open();
    }
  }
  
  public confirmedDeleteEntities(data: any) {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'],
        {queryParams: {'errorCode': LoginErrorCodes.NOT_VALID, 'redirectUrl': this._router.url}});
    } else {
      this.showLoading = true;
      this.updateErrorMessage = '';
      
      this._helpContentService.deleteEntities(this.selectedEntities, this.properties.adminToolsAPIURL).subscribe(
        _ => {
          this.deleteEntitiesFromArray(this.selectedEntities);
          this.showLoading = false;
        },
        error => this.handleUpdateError('System error deleting the selected entities', error)
      );
    }
  }
  
  public editEntity(i: number) {
    const entity: Entity = this.checkboxes[i].entity;
    this.myForm = this._fb.group({
      name: [entity.name, Validators.required],
      _id: entity._id,
      pid: [entity.pid, Validators.required],
    });
    this.modalErrorMessage = '';
    this.entitiesModalOpen(this.alertModalSaveEntity, '', 'Save Changes');
  }
  
  public newEntity() {
    this.myForm = this._fb.group({
      pid: ['', Validators.required],
      name: ['', Validators.required],
      isEnabled: '',
      _id: ''
    });
    this.modalErrorMessage = '';
    this.entitiesModalOpen(this.alertModalSaveEntity, '', 'Save');
  }
  
  private entitiesModalOpen(modal: any, title: string, yesBtn: string) {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'],
        {queryParams: {'errorCode': LoginErrorCodes.NOT_VALID, 'redirectUrl': this._router.url}});
    } else {
      modal.cancelButton = true;
      modal.okButton = true;
      modal.alertTitle = title;
      modal.okButtonText = yesBtn;
      modal.open();
    }
  }
  
  public entitySaveConfirmed(data: any) {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'],
        {queryParams: {'errorCode': LoginErrorCodes.NOT_VALID, 'redirectUrl': this._router.url}});
    } else {
      this.modalErrorMessage = '';
      if (this.myForm.getRawValue()['_id'].length > 0) {
        this._helpContentService.updateEntity(
          <Entity>this.myForm.value, this.properties.adminToolsAPIURL).subscribe(
          entity => {
            this.entityUpdatedSuccessfully(entity);
          },
          error => this.handleUpdateError('System error updating entity', error)
        );
      } else {
        this._helpContentService.saveEntity(<Entity>this.myForm.value, this.properties.adminToolsAPIURL).subscribe(
          entity => {
            this.entitySavedSuccessfully(entity);
          },
          error => this.handleUpdateError('System error creating entity', error)
        );
      }
    }
  }
  
  
  public entitySavedSuccessfully(entity: Entity) {
    this.checkboxes.push(<CheckEntity>{entity: entity, checked: false});
    this.applyCheck(false);
  }
  
  public entityUpdatedSuccessfully(entity: Entity) {
    this.checkboxes.find(checkItem => checkItem.entity._id === entity._id).entity = entity;
    this.applyCheck(false);
  }
  
  public filterBySearch(text: string) {
    this.searchText = new RegExp(text, 'i');
    this.applyFilter();
  }
  
  public applyFilter() {
    this.checkboxes = [];
    this.entities.filter(item => this.filterEntities(item)).forEach(
      _ => this.checkboxes.push(<CheckEntity>{entity: _, checked: false})
    );
  }
  
  public filterEntities(entity: Entity): boolean {
    const textFlag = this.searchText.toString() === '' || (entity.name).match(this.searchText) != null;
    return textFlag;
  }
  
  public applyStatusFilter() {
    this.checkboxes = [];
    this.entities.filter(item => this.filterEntitiesByStatus(item)).forEach(
      _ => this.checkboxes.push(<CheckEntity>{entity: _, checked: false})
    );
  }
  
  public filterEntitiesByStatus(entity: Entity): boolean {
    let status = this.filterForm.get("status").value;
    return status == "all" || (status == "disabled" && !entity.isEnabled) || (status == "enabled" && entity.isEnabled);
  }
  
  handleError(message: string, error) {
    this.errorMessage = message;
    console.log('Server responded: ' + error);
    
    this.showLoading = false;
  }
  
  handleUpdateError(message: string, error) {
    if (error == null) {
      this.myForm = this._fb.group({
        pid: ['', Validators.required],
        name: ['', Validators.required],
        isEnabled: '',
        _id: ''
      });
    } else {
      this.updateErrorMessage = message;
      console.log('Server responded: ' + error);
    }
    
    this.showLoading = false;
  }
  
  public applyPortalFilter(portal: string) {
    this.getEntities(portal);
  }
  
  public toggleEntities(status: boolean, ids: string[]) {
    // this.okModal.showModal();
    this.toggleIds = ids;
    this.toggleStatus = status;
    this.confirmRelatedPagesModalOpen();
  }
  
  private confirmRelatedPagesModalOpen() {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'],
        {queryParams: {'errorCode': LoginErrorCodes.NOT_VALID, 'redirectUrl': this._router.url}});
    } else {
      this.alertModalRelatedPages.cancelButton = true;
      this.alertModalRelatedPages.okButton = true;
      this.alertModalRelatedPages.alertTitle = 'Warning';
      this.alertModalRelatedPages.message = "This action will affect all search pages related to this entity! Pages' status will change to entity's status! Do you want to continue?";
      this.alertModalRelatedPages.okButtonText = 'Yes';
      this.alertModalRelatedPages.open();
    }
  }
  
  public continueToggling(event: any) {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'],
        {queryParams: {'errorCode': LoginErrorCodes.NOT_VALID, 'redirectUrl': this._router.url}});
    } else {
      this.updateErrorMessage = '';
      this._helpContentService.toggleEntities(
        this.portal, this.toggleIds, this.toggleStatus, this.properties.adminToolsAPIURL).subscribe(
        () => {
          for (let id of this.toggleIds) {
            const i = this.checkboxes.findIndex(_ => _.entity._id === id);
            this.checkboxes[i].entity.isEnabled = this.toggleStatus;
          }
          this.applyCheck(false);
        },
        error => this.handleUpdateError('System error changing the status of the selected entity(-ies)', error)
      );
    }
  }
}