import {Component, ElementRef, OnInit, ViewChild} from '@angular/core';
import {ActivatedRoute, Router} from '@angular/router';
import {HelpContentService} from '../../services/help-content.service';
import {FormArray, FormBuilder, FormControl, FormGroup, Validators} from '@angular/forms';
import {CheckPage, Page} from '../../utils/entities/adminTool/page';
import {Community} from '../../utils/entities/adminTool/community';
import {Entity} from '../../utils/entities/adminTool/entity';
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 {Observable, Subscriber} from "rxjs";
import {map, startWith} from "rxjs/operators";
import {MatAutocompleteSelectedEvent} from "@angular/material";

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

export class PagesComponent implements OnInit {

  @ViewChild('AlertModalSavePage') alertModalSavePage;
  @ViewChild('AlertModalDeletePages') alertModalDeletePages;
  private selectedPages: string[] = [];

  public checkboxes: CheckPage[] = [];

  public pages: Page[] = [];
  public pageWithDivIds: string[] = [];

  //public errorMessage: string;

  public myForm: FormGroup;

  private searchText: RegExp = new RegExp('');
  public keyword: string = '';

  public communities: Community[] = [];

  public selectedCommunityPid: string;

  public pagesType: string;
  public properties: EnvProperties = null;

  public showLoading: boolean = true;
  public errorMessage: string = '';
  public updateErrorMessage: string = '';
  public modalErrorMessage: string = '';
  public isPortalAdministrator = null;
  public filterForm: FormControl;
  public typeOptions = [{label: 'Search', value: 'search'}, {label: 'Link', value: 'link'}, {
    label: 'Share',
    value: 'share'
  }, {label: 'Landing', value: 'landing'}, {label: 'HTML', value: 'html'}, {
    label: 'Link',
    value: 'link'
  }, {label: 'Other', value: 'other'}]
  public entitiesCtrl: FormArray;
  @ViewChild('PageInput') pageInput: ElementRef<HTMLInputElement>;
  public entitiesSearchCtrl: FormControl;
  filteredEntities: Observable<Entity[]>;
  selectedEntities: Entity[] = [];
  allEntities: Entity[] = [];

  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.control('');
    this.subscriptions.push(this.filterForm.valueChanges.subscribe(value => {
      this.filterBySearch(value);
    }));
    this.entitiesSearchCtrl = this._fb.control('');
    this.myForm = this._fb.group({
      route: ['', Validators.required],
      name: ['', Validators.required],
      isEnabled: true,
      openaire: true,
      connect: false,
      communities: true,
      top: true,
      bottom: true,
      left: true,
      right: true,
      type: ['', Validators.required],
      entities: this.entitiesCtrl,
      _id: '',
    });
    this.route.data
      .subscribe((data: { envSpecific: EnvProperties }) => {
        this.properties = data.envSpecific;

        this.route.queryParams.subscribe(params => {
          HelperFunctions.scroll();

          this.pagesType = '';
          if (params['type']) {
            this.pagesType = params['type'];
          }

          this.keyword = '';
          this.userManagementService.getUserInfo().subscribe(user => {
            this.selectedCommunityPid = params['communityId'];
            this.applyCommunityFilter(this.selectedCommunityPid);
            this.isPortalAdministrator = Session.isPortalAdministrator(user) && !this.selectedCommunityPid;
          });
          //this.getCommunities();
        });

        this._helpContentService.getEntities(this.properties.adminToolsAPIURL).subscribe(
          entities => {
            this.allEntities = entities;
            this.showLoading = false;
          },
          error => this.handleError('System error retrieving community entities', error));


      });
  }

  ngOnDestroy(): void {
    this.subscriptions.forEach(value => {
      if (value instanceof Subscriber) {
        value.unsubscribe();
      } else if (value instanceof Function) {
        value();
      }
    });
  }

  getPages(community_pid: 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 = '';

      this.pageWithDivIds = [];

      let parameters = '';
      if (this.pagesType) {
        parameters = '?page_type=' + this.pagesType;
      }
      if (community_pid) {
        this._helpContentService.getCommunityPages(community_pid, parameters, this.properties.adminToolsAPIURL).subscribe(
          pages => {
            this.pagesReturned(pages);
            //if(!this.pagesType || this.pagesType == "link") {
            this.getPagesWithDivIds(community_pid);
            //} else {
            //this.showLoading = false;
            //}
          },
          error => this.handleError('System error retrieving pages', error)
        );
      } else {
        this._helpContentService.getPagesFull(this.properties.adminToolsAPIURL, null).subscribe(
          pages => {
            this.pagesReturned(pages);
            this.showLoading = false;
          },
          error => this.handleError('System error retrieving pages', error)
        );
      }
    }
  }

  getPagesWithDivIds(community_pid: string) {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'], {
        queryParams: {
          'errorCode': LoginErrorCodes.NOT_VALID,
          'redirectUrl': this._router.url
        }
      });
    } else {
      this._helpContentService.getPagesWithDivIds(community_pid, this.properties.adminToolsAPIURL).subscribe(
        pages => {
          this.pageWithDivIds = pages;
          this.showLoading = false;
        },
        error => this.handleError('System error retrieving information about pages\' classes', error));
    }
  }

  pagesReturned(pages: Page[]) {
    this.pages = pages;
    this.checkboxes = [];

    if (pages) {
      pages.forEach(_ => {
        this.checkboxes.push(<CheckPage>{page: _, checked: false});
      });
    }
  }

  /*
      getCommunities() {
          this._helpContentService.getCommunities(this.properties.adminToolsAPIURL).subscribe(
              communities => {
                  this.communities = communities;
                  this.selectedCommunityPid = this.communities[0].pid;
                  this.getPages(this.selectedCommunityPid);
                  this.getPagesWithDivIds(this.selectedCommunityPid);
          },
          error => this.handleError('System error retrieving communities', error));
      }
  */

  public toggleCheckBoxes(event) {
    this.checkboxes.forEach(_ => _.checked = event.target.checked);
  }

  public applyCheck(flag: boolean) {
    this.checkboxes.forEach(_ => _.checked = flag);
  }

  public getSelectedPages(): string[] {
    return this.checkboxes.filter(page => page.checked == true).map(checkedPage => checkedPage.page).map(res => res._id);
  }

  private deletePagesFromArray(ids: string[]): void {
    for (let id of ids) {
      let i = this.checkboxes.findIndex(_ => _.page._id == id);
      this.checkboxes.splice(i, 1);
    }
  }

  public confirmDeletePage(id: string) {
    //this.deleteConfirmationModal.ids = [id];
    //this.deleteConfirmationModal.showModal();
    this.selectedPages = [id];
    this.confirmModalOpen();
  }

  public confirmDeleteSelectedPages() {
    //this.deleteConfirmationModal.ids = this.getSelectedPages();
    //this.deleteConfirmationModal.showModal();
    this.selectedPages = this.getSelectedPages();
    this.confirmModalOpen();
  }

  private confirmModalOpen() {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'], {
        queryParams: {
          'errorCode': LoginErrorCodes.NOT_VALID,
          'redirectUrl': this._router.url
        }
      });
    } else {
      this.alertModalDeletePages.cancelButton = true;
      this.alertModalDeletePages.okButton = true;
      this.alertModalDeletePages.alertTitle = 'Delete Confirmation';
      this.alertModalDeletePages.message = 'Are you sure you want to delete the selected page(s)?';
      this.alertModalDeletePages.okButtonText = 'Yes';
      this.alertModalDeletePages.open();
    }
  }

  public confirmedDeletePages(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.deletePages(this.selectedPages, this.properties.adminToolsAPIURL).subscribe(
        _ => {
          this.deletePagesFromArray(this.selectedPages);
          this.showLoading = false;
        },
        error => this.handleUpdateError('System error deleting the selected pages', error)
      );
    }
  }

  public editPage(i: number) {
    this.entitiesCtrl = this._fb.array([]);
    let page: Page = this.checkboxes[i].page;
    this.myForm = this._fb.group({
      route: [page.route, Validators.required],
      name: [page.name, Validators.required],
      isEnabled: page.isEnabled,
      openaire: page.openaire,
      connect: page.connect,
      communities: page.communities,
      top: page.top,
      bottom: page.bottom,
      left: page.left,
      right: page.right,
      type: [page.type, Validators.required],
      entities: this.entitiesCtrl,
      _id: page._id,
    });

    for (let i = 0; i < page.entities.length; i++) {
      this.entitiesCtrl.push(this._fb.control(page.entities[i]));
    }
    this.filteredEntities = this.entitiesSearchCtrl.valueChanges.pipe(startWith(''),
      map(page => this._filter(page)));
    this.selectedEntities = JSON.parse(JSON.stringify(page.entities));
    this.modalErrorMessage = '';
    this.pagesModalOpen(this.alertModalSavePage, '', 'Save changes');
  }

  private _filter(value: string): Entity[] {
    if (!value || value.length == 0) {
      return this.allEntities.slice();
    }
    const filterValue = value.toString().toLowerCase();
    return this.allEntities.filter(page => page.name.toLowerCase().indexOf(filterValue) != -1);
  }

  public newPage() {
    this.entitiesCtrl = this._fb.array([]);
    this.myForm = this._fb.group({
      route: ['', Validators.required],
      name: ['', Validators.required],
      isEnabled: true,
      openaire: true,
      connect: false,
      communities: true,
      top: true,
      bottom: true,
      left: true,
      right: true,
      type: [this.typeOptions[0].value, Validators.required],
      entities: this._fb.array([]),
      _id: '',
    });
    this.selectedEntities = [];
    this.modalErrorMessage = '';
    this.filteredEntities = this.entitiesSearchCtrl.valueChanges.pipe(startWith(''),
      map(page => this._filter(page)));
    this.pagesModalOpen(this.alertModalSavePage, '', 'Save');
  }

  private pagesModalOpen(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 pageSaveConfirmed(data: any) {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'], {
        queryParams: {
          'errorCode': LoginErrorCodes.NOT_VALID,
          'redirectUrl': this._router.url
        }
      });
    } else {
      console.log(this.myForm.value)
      if (this.myForm.value['_id'].length == 0) {
        this.modalErrorMessage = '';
        this._helpContentService.savePage(<Page>this.myForm.value, this.properties.adminToolsAPIURL).subscribe(
          page => {
            this.pageSavedSuccessfully(page, true);
          },
          error => this.handleUpdateError('System error creating page', error)
        );
      } else {
        this._helpContentService.updatePage(<Page>this.myForm.value, this.properties.adminToolsAPIURL).subscribe(
          page => {
            this.pageSavedSuccessfully(page, false);
          },
          error => this.handleUpdateError('System error updating page', error)
        );
      }

    }
  }

  /* public pageUpdateConfirmed(data: any) {
     if (!Session.isLoggedIn()) {
       this._router.navigate(['/user-info'], {queryParams: {'errorCode': LoginErrorCodes.NOT_VALID, 'redirectUrl': this._router.url}});
     } else {
       if (!this.myForm.valid) {
         this.pagesModalOpen(this.alertModalSavePage, 'Update', 'Update Page');
         this.modalErrorMessage = 'Please fill in all required fields marked with *';
       } else {
         this._helpContentService.updatePage(<Page>this.myForm.value, this.properties.adminToolsAPIURL).subscribe(
           page => {
             this.pageUpdatedSuccessfully(page);
           },
           error => this.handleUpdateError('System error updating page', error)
         );
       }
     }
   }*/

  public pageSavedSuccessfully(page: Page, isNew: boolean) {
    if (isNew) {
      this.checkboxes.push(<CheckPage>{page: page, checked: false});
    } else {
      this.checkboxes.find(checkItem => checkItem.page._id == page._id).page = page;
    }
    this.applyCheck(false);
  }


  public filterBySearch(text: string) {
    this.searchText = new RegExp(text, 'i');
    this.applyFilter();
  }

  public applyFilter() {
    this.checkboxes = [];
    this.pages.filter(item => this.filterPages(item)).forEach(
      _ => this.checkboxes.push(<CheckPage>{page: _, checked: false})
    );
  }

  public filterPages(page: Page): boolean {
    let textFlag = this.searchText.toString() == '' || (page.route + ' ' + page.name).match(this.searchText) != null;
    return textFlag;
  }

  handleError(message: string, error) {
    // if(error == null) {
    //     this.formComponent.reset();
    // } else {
    this.errorMessage = message;// + ' (Server responded: ' + error + ')';
    console.log('Server responded: ' + error);
    //}

    this.showLoading = false;
  }

  handleUpdateError(message: string, error) {
    if (error == null) {
      // this.formComponent.reset();
      this.myForm = this._fb.group({
        route: ['', Validators.required],
        name: ['', Validators.required],
        isEnabled: true,
        openaire: true,
        connect: false,
        communities: true,
        top: true,
        bottom: true,
        left: true,
        right: true,
        type: ['', Validators.required],
        entities: this._fb.array([]),
        _id: '',
      });
    } else {
      this.updateErrorMessage = message;// + ' (Server responded: ' + error + ')';
      console.log('Server responded: ' + error);
    }

    this.showLoading = false;
  }

  // public filterByCommunity(event: any) {
  //     this.selectedCommunityPid = event.target.value;
  //     this.applyCommunityFilter(this.selectedCommunityPid);
  // }

  public applyCommunityFilter(community_pid: string) {
    this.getPages(community_pid);
  }

  public togglePages(status: boolean, ids: string[]) {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'], {
        queryParams: {
          'errorCode': LoginErrorCodes.NOT_VALID,
          'redirectUrl': this._router.url
        }
      });
    } else {
      this.updateErrorMessage = '';

      this._helpContentService.togglePages(this.selectedCommunityPid, ids, status, this.properties.adminToolsAPIURL).subscribe(
        () => {
          for (let id of ids) {
            let i = this.checkboxes.findIndex(_ => _.page._id == id);
            this.checkboxes[i].page.isEnabled = status;
          }
          this.applyCheck(false);
        },
        error => this.handleUpdateError('System error changing the status of the selected page(s)', error)
      );
    }
  }

  public capitalizeFirstLetter(str: string) {
    return str.charAt(0).toUpperCase() + str.slice(1);
  }

  remove(entity): void {
    let index = this.selectedEntities.indexOf(entity);
    console.log(entity);
    console.log(this.selectedEntities);
    console.log(index)
    if (index >= 0) {
      this.selectedEntities.splice(index, 1);
      this.entitiesCtrl.value.splice(index, 1);
      this.entitiesCtrl.markAsDirty();
    }
  }

  selected(event: MatAutocompleteSelectedEvent): void {

    let newEntity = event.option.value;

    if (this.selectedEntities.indexOf(newEntity) == -1) {
      this.selectedEntities.push(event.option.value);
      this.entitiesCtrl.push(this._fb.control(newEntity));
      this.entitiesCtrl.markAsDirty();
    }
    this.pageInput.nativeElement.value = '';
    this.entitiesSearchCtrl.setValue('');
  }
}