import {Component, ElementRef, OnInit, ViewChild} from '@angular/core';
import {ActivatedRoute, Router} from "@angular/router";
import {HelpContentService} from "../../services/help-content.service";
import {FormArray, FormBuilder, FormGroup, Validators} from "@angular/forms";
import {CheckDivId, DivId} from "../../utils/entities/adminTool/divId";
import {Page} from "../../utils/entities/adminTool/page";
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 {Subscriber} from "rxjs";
import {properties} from "../../../../environments/environment";
import {PortalUtils} from "../portal/portalHelper";
import {AlertModal} from "../../utils/modal/alert";
import {Option} from "../../sharedComponents/input/input.component";
import {SearchInputComponent} from "../../sharedComponents/search-input/search-input.component";

declare var UIkit;

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

export class DivIdsComponent implements OnInit {
  @ViewChild('editModal') editModal: AlertModal;
  @ViewChild('deleteModal') deleteModal: AlertModal;
  private selectedDivIds: string[] = [];
  public checkboxes: CheckDivId[] = [];
  public divIds: DivId[] = [];
  public classForm: FormGroup;
  public pagesCtrl: FormArray;

  private searchText: RegExp = new RegExp('');
  public keyword: string = "";
  public properties: EnvProperties = properties;
  public formPages: Page[] = [];
  public showLoading: boolean = true;
  public errorMessage: string = '';
  public updateErrorMessage: string = '';
  public modalErrorMessage: string = '';
  public filterForm: FormGroup;
  private subscriptions: any[] = [];
  public allPages: Option[] = [];
  @ViewChild('PageInput') pageInput: ElementRef<HTMLInputElement>;
  selectedCommunityPid = null;
  public portalUtils:PortalUtils = new PortalUtils();
  private index: number;
  public selectedKeyword: string;
  @ViewChild('searchInputComponent') searchInputComponent: SearchInputComponent;
  
  ngOnInit() {
    this.filterForm =  this._fb.group({
      keyword: [''],
      type: ['all', Validators.required]});
    this.subscriptions.push(this.filterForm.get('keyword').valueChanges.subscribe(value => {
      this.searchText = new RegExp(value, 'i');
      this.applyFilters();
    }));
    this.subscriptions.push(this.filterForm.get('type').valueChanges.subscribe(value => {
      this.applyFilters();
    }));
    this.getDivIds();
    this.subscriptions.push(this.route.queryParams.subscribe(params => {
      HelperFunctions.scroll();
      this.selectedCommunityPid = params['communityId'];
      this.getPages();
    }));

  }

  constructor(private element: ElementRef, private route: ActivatedRoute, private _router: Router, private _helpContentService: HelpContentService, private _fb: FormBuilder) {
  }

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

  getDivIds() {
    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.subscriptions.push(this._helpContentService.getAllDivIdsFull( this.properties.adminToolsAPIURL).subscribe(
        divIds => {
          this.divIds = divIds;
          this.checkboxes = [];

          let self = this;
          divIds.forEach(_ => {
            self.checkboxes.push(<CheckDivId>{divId: _, checked: false});
          });

          this.showLoading = false;
        },
        error => this.handleError('System error retrieving classes', error)));
    }
  }

  // public showModal():void {
  //     this.modal.showModal();
  // }

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

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

  public getSelectedDivIds(): string[] {
    return this.checkboxes.filter(divId => divId.checked == true).map(checkedDivId => checkedDivId.divId).map(res => res._id);
  }

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

  public confirmDeleteDivId(id: string) {
    this.selectedDivIds = [id];
    this.confirmModalOpen();
  }

  public confirmDeleteSelectedDivIds() {
    this.selectedDivIds = this.getSelectedDivIds();
    this.confirmModalOpen();
  }

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

  public confirmedDeleteDivIds(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.subscriptions.push(this._helpContentService.deleteDivIds(this.selectedDivIds, this.properties.adminToolsAPIURL).subscribe(
        _ => {
          this.deleteDivIdsFromArray(this.selectedDivIds);
          UIkit.notification('Classes have been <b>successfully deleted</b>', {
            status: 'success',
            timeout: 6000,
            pos: 'bottom-right'
          });
          this.showLoading = false;
        },
        error => this.handleUpdateError('System error deleting the selected classes', error)
      ));
    }
  }

  public editDivId(i: number) {
    let divId: DivId = this.checkboxes[i].divId;
    this.index = this.divIds.findIndex(value => value._id === divId._id);
    this.formPages = <Page[]>divId.pages;
    this.pagesCtrl = this._fb.array([], Validators.required);
    this.classForm = this._fb.group({
      _id: this._fb.control(divId._id),
      name: this._fb.control(divId.name, Validators.required),
      pages: this.pagesCtrl,
      portalType: this._fb.control(divId.portalType, Validators.required)
    });
    this.classForm.get('portalType').disable();
    for(let i = 0; i < divId.pages.length; i++) {
      this.pagesCtrl.push(this._fb.control(divId.pages[i]));
    }
    this.divIdsModalOpen("Edit class", "Save Changes");
  }

  public newDivId() {
    this.pagesCtrl = this._fb.array([], Validators.required);
    if(this.classForm) {
      this.classForm.get('portalType').enable();
    }
    this.classForm = this._fb.group({
      _id: this._fb.control(null),
      name: this._fb.control('', Validators.required),
      pages: this.pagesCtrl,
      portalType: this._fb.control('', Validators.required)
    });
    this.modalErrorMessage = "";
    this.divIdsModalOpen("Create class", "Create");
  }

  private divIdsModalOpen(title: string, yesBtn: string) {
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'], {
        queryParams: {
          "errorCode": LoginErrorCodes.NOT_VALID,
          "redirectUrl": this._router.url
        }
      });
    } else {
      this.editModal.cancelButton = true;
      this.editModal.okButton = true;
      this.editModal.okButtonLeft = false;
      this.editModal.alertTitle = title;
      this.editModal.okButtonText = yesBtn;
      this.editModal.open();
    }
  }

  public divIdSaveConfirmed(data: any) {
    this.showLoading = true;
    if (!Session.isLoggedIn()) {
      this._router.navigate(['/user-info'], {
        queryParams: {
          "errorCode": LoginErrorCodes.NOT_VALID,
          "redirectUrl": this._router.url
        }
      });
    } else {
      if (!this.classForm.value._id) {
        this.modalErrorMessage = "";
        this.subscriptions.push(this._helpContentService.saveDivId(<DivId>this.classForm.value, this.properties.adminToolsAPIURL).subscribe(
          divId => {
            this.divIdSavedSuccessfully(divId);
            UIkit.notification('Class <b>' + divId.name + '</b> has been <b>successfully created</b>', {
              status: 'success',
              timeout: 6000,
              pos: 'bottom-right'
            });
          },
          error => this.handleUpdateError("System error creating class", error)
        ));
      } else {
        this.classForm.get('portalType').enable();
        this.subscriptions.push(this._helpContentService.updateDivId(<DivId>this.classForm.value, this.properties.adminToolsAPIURL).subscribe(
          divId => {
            this.divIdUpdatedSuccessfully(divId);
            UIkit.notification('Class <b>' + divId.name + '</b> has been <b>successfully updated</b>', {
              status: 'success',
              timeout: 6000,
              pos: 'bottom-right'
            });
          },
          error => this.handleUpdateError("System error updating class", error)
        ));

      }
    }
  }

  public divIdSavedSuccessfully(divId: DivId) {
    this.divIds.push(divId);
    this.applyFilters();
    this.applyCheck(false);
    this.showLoading = false;
  }

  public divIdUpdatedSuccessfully(divId: DivId) {
    this.divIds[this.index] = divId;
    this.applyFilters();
    this.applyCheck(false);
    this.showLoading = false;
  }

  public applyFilters() {
    this.checkboxes = [];
    this.divIds.filter(item => this.filterByType(item)).forEach(
      item => this.checkboxes.push(<CheckDivId>{divId: item, checked: false})
    );
    this.checkboxes = this.checkboxes.filter(item => this.filterDivIds(item.divId));
  }

  public filterByType(divId: DivId): boolean {
    let type = this.filterForm.get("type").value;
    return  type == "all" || (type  == divId.portalType);
  }
  public filterDivIds(divId: DivId): boolean {
    let textFlag = this.searchText.toString() == '' || (divId.name + ' ' + divId.portalType).match(this.searchText) != null;
    return textFlag;
  }

  handleUpdateError(message: string, error) {
    if (error == null) {
      // this.formComponent.reset();
    } else {
      this.updateErrorMessage = message;
      console.log('Server responded: ' + error);
    }
    UIkit.notification('An error has occurred. Please try again later', {
      status: 'danger',
      timeout: 6000,
      pos: 'bottom-right'
    });
    this.showLoading = false;
  }

  handleError(message: string, error) {
    this.errorMessage = message;
    console.log('Server responded: ' + error);

    this.showLoading = false;
  }

  getPages() {
    this.showLoading = true;
    this.errorMessage = "";
    this.subscriptions.push(this._helpContentService.getAllPages(this.properties.adminToolsAPIURL).subscribe(
      pages => {
        this.allPages = [];
        pages.forEach(page => {
          this.allPages.push({
            label: page.name,
            value: page
          });
        });
        this.showLoading = false;
      },
      error => this.handleError('System error retrieving pages', error)
    ));
  }
  
  public onSearchClose() {
    this.selectedKeyword = this.filterForm.get('keyword').value;
  }
  
  public reset() {
    this.selectedKeyword = null;
    this.searchInputComponent.reset()
  }
}