import {Component, ViewChild, OnInit, ElementRef} from '@angular/core';
import {Router, ActivatedRoute} from "@angular/router";
import {FormBuilder, FormControl, FormGroup} from "@angular/forms";
import {HelpContentService} from "../../services/help-content.service";
import {
  DivHelpContent,
  CheckDivHelpContent,
  DivHelpContentFilterOptions
} from "../../utils/entities/adminTool/div-help-content";
import {Page} from "../../utils/entities/adminTool/page";
import {Community} from "../../utils/entities/adminTool/community";
import {DivId} from "../../utils/entities/adminTool/divId";
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";

@Component({
  selector: 'div-help-contents',
  templateUrl: './div-help-contents.component.html',
})

export class DivHelpContentsComponent implements OnInit {
  // @ViewChild('deleteConfirmationModal')
  // public deleteConfirmationModal : DeleteConfirmationDialogComponent;
  @ViewChild('AlertModalDeleteDivHelpContents') alertModalDeleteDivHelpContents;
  private selectedDivContents: string[] = [];

  public checkboxes: CheckDivHelpContent[] = [];

  public divHelpContents: DivHelpContent[] = [];

  //public errorMessage: string;

  public formGroup: FormGroup;

  public pages: Page[];

  public checkboxAll: boolean = false;

  public filters: DivHelpContentFilterOptions = {id: '', active: null, text: new RegExp('')};
  public keyword: string = "";

  public counter = {all: 0, active: 0, inactive: 0};

  public communities: Community[] = [];

  public selectedCommunityPid: string;

  public selectedPageId: string;

  public community: Community;

  public page: Page;
  public properties: EnvProperties = null;

  public showLoading: boolean = true;
  public errorMessage: string = '';
  public updateErrorMessage: string = '';
  public filterForm: FormControl;
  public selectForm: FormControl;
  public selectOptions = [];
  private subscriptions: any[] = [];

  ngOnInit() {
    this.filterForm = this._fb.control('');
    this.selectForm = this._fb.control('');
    this.subscriptions.push(this.filterForm.valueChanges.subscribe(value => {
      this.filterBySearch(value);
    }));
    this.subscriptions.push(this.selectForm.valueChanges.subscribe(value => {
      this.filterByPage(value);
    }));

    this.route.data
      .subscribe((data: { envSpecific: EnvProperties }) => {
        this.properties = data.envSpecific;

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

          this.selectedCommunityPid = params['communityId'];
          this.selectedPageId = params['pageId'];

          if (this.selectedCommunityPid && this.selectedPageId) {
            this.getPage(this.selectedPageId);
          } else if (this.selectedCommunityPid) {
            this.selectedPageId = "";
            this.getPages(this.selectedCommunityPid);
          }
        });
      });
  }

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

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

  getPage(pageId: 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._helpService.getPage(pageId, this.properties.adminToolsAPIURL).subscribe(
        page => {
          if ((this.selectedCommunityPid == 'openaire' && !page.openaire)
            || (this.selectedCommunityPid == 'connect' && !page.connect)
            || (this.selectedCommunityPid != 'openaire' && this.selectedCommunityPid != 'connect' && !page.communities)) {
            this.router.navigate(['/classContents'], {queryParams: {"communityId": this.selectedCommunityPid}});
          } else {
            this.page = page;
            this.getDivHelpContents(this.selectedCommunityPid);
          }
        },
        error => this.handleError('System error retrieving page', error));
    }
  }

  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._helpService.getCommunityPagesWithDivId(community_pid, this.properties.adminToolsAPIURL).subscribe(
        //this._helpService.getPagesWithDivIds(community_pid, this.properties.adminToolsAPIURL).subscribe(
        pages => {
          this.pages = pages;
          this.getDivHelpContents(this.selectedCommunityPid);
          this.selectOptions = [{label:'All pages', value: ''}];
          for (let page of this.pages) {
            this.selectOptions.push({label:page.name, value: page._id})
          }
        },
        error => this.handleError('System error retrieving pages', error));
    }
  }

  public countDivHelpContents() {
    this.counter = {all: 0, active: 0, inactive: 0};
    let filter = Object.assign({}, this.filters);
    filter.active = null;
    this.divHelpContents.forEach(_ => {
      if (this.filterDivHelpContent(_, filter)) {
        if (_.isActive == true) this.counter.active++;
        else this.counter.inactive++
      }
    });
    this.counter.all = this.counter.active + this.counter.inactive;
  }

  getDivHelpContents(community_pid: string) {
    if (!Session.isLoggedIn()) {
      this.router.navigate(['/user-info'], {
        queryParams: {
          "errorCode": LoginErrorCodes.NOT_VALID,
          "redirectUrl": this.router.url
        }
      });
    } else {
      this._helpService.getCommunityDivHelpContents(community_pid, this.properties.adminToolsAPIURL).subscribe(
        divHelpContents => {
          this.divHelpContents = divHelpContents as Array<DivHelpContent>;
          this.counter.all = this.divHelpContents.length;
          this.checkboxes = [];

          for (let i = this.divHelpContents.length - 1; i >= 0; i -= 1) {
            //for (let i = 0; i < this.divHelpContents.length; i++) {
            let divId: DivId = this.divHelpContents[i].divId as DivId;
            let pages: Page[] = divId.pages as Page[];
            const pageIds = pages.map(x => x._id);

            if (!this.selectedPageId || pageIds.includes(this.selectedPageId)) {
              this.cutContent(this.divHelpContents[i]);
              this.checkboxes.unshift(<CheckDivHelpContent>{divHelpContent: this.divHelpContents[i], checked: false});
            } else {
              this.divHelpContents.splice(i, 1);
            }
          }

          this.countDivHelpContents();

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

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

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

  public getSelectedDivHelpContents(): string[] {
    return this.checkboxes.filter(divHelpContent => divHelpContent.checked == true)
      .map(checkedDivHelpContent => checkedDivHelpContent.divHelpContent).map(res => res._id);
  }

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

  public confirmDeleteSelectedDivHelpContents() {
    //this.deleteConfirmationModal.ids = this.getSelectedDivHelpContents();
    //this.deleteConfirmationModal.showModal();
    this.selectedDivContents = this.getSelectedDivHelpContents();
    this.confirmModalOpen();
  }

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

  public confirmedDeleteDivHelpContents(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._helpService.deleteDivHelpContents(this.selectedDivContents, this.properties.adminToolsAPIURL).subscribe(
        _ => {
          this.deleteDivHelpContentsFromArray(this.selectedDivContents);
          this.showLoading = false;
        },
        error => this.handleUpdateError('System error deleting the selected class content(s)', error)
      );
    }
  }

  private deleteDivHelpContentsFromArray(ids: string[]): void {
    for (let id of ids) {
      let iqc = this.checkboxes.findIndex(_ => _.divHelpContent._id == id);
      let iq = this.divHelpContents.findIndex(_ => _._id == id);
      this.checkboxes.splice(iqc, 1);
      this.divHelpContents.splice(iqc, 1);
    }
    this.countDivHelpContents();
  }

  public editDivHelpContent(id: string) {
    //this.router.navigate(['/pageContents/edit/', _id]);
    if (this.selectedPageId) {
      this.router.navigate(['/classContents/edit/'], {
        queryParams: {
          "classContentId": id,
          "communityId": this.selectedCommunityPid,
          "pageId": this.selectedPageId
        }
      });
    } else {
      this.router.navigate(['/classContents/edit/'], {
        queryParams: {
          "classContentId": id,
          "communityId": this.selectedCommunityPid
        }
      });
    }
  }

  public toggleDivHelpContents(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._helpService.toggleDivHelpContents(ids, status, this.properties.adminToolsAPIURL).subscribe(
        () => {
          for (let id of ids) {
            let i = this.checkboxes.findIndex(_ => _.divHelpContent._id == id);
            this.checkboxes[i].divHelpContent.isActive = status;
          }
          this.countDivHelpContents();
          this.applyCheck(false);
        },
        error => this.handleUpdateError('System error changing the status of the selected page content(s)', error)
      );
    }
  }

  public divHelpContentSavedSuccessfully(divHelpContent: DivHelpContent) {
    this.cutContent(divHelpContent);
    this.checkboxes.push(<CheckDivHelpContent>{divHelpContent: divHelpContent, checked: false});
    this.divHelpContents.push(divHelpContent);
    this.applyCheck(false);
    this.countDivHelpContents();
  }

  public divHelpContentUpdatedSuccessfully(divHelpContent: DivHelpContent) {
    this.checkboxes.find(checkItem => checkItem.divHelpContent._id == divHelpContent._id).divHelpContent = divHelpContent;
    let index = this.divHelpContents.findIndex(checkItem => checkItem._id == divHelpContent._id);
    this.divHelpContents[index] = divHelpContent;
    this.applyCheck(false);
    this.countDivHelpContents();
  }


  public filterDivHelpContent(divHelpContent: DivHelpContent, filters: DivHelpContentFilterOptions): boolean {
    let divId: DivId = divHelpContent.divId as DivId;
    let pages: Page[] = <Page[]>divId.pages;
    let pageIds: string[] = pages.map(x => x._id);

    let idFlag = filters.id == '' || /*(<Page[]>divId.pages)._id == filters.id*/ pageIds.includes(filters.id);
    let activeFlag = filters.active == null || divHelpContent.isActive == filters.active;
    let textFlag = filters.text.toString() == '' || (divHelpContent.content).match(filters.text) != null
      || ((<DivId>divHelpContent.divId).name).match(filters.text) != null;
    return idFlag && activeFlag && textFlag;
  }

  public cutContent(divHelpContent: DivHelpContent) {
    divHelpContent.content = divHelpContent.content.replace(/<[^>]*>/g, '');
    divHelpContent.content = divHelpContent.content.replace(/(\r\n|\n|\r| +(?= ))|\s\s+/gm, " ");
    if (divHelpContent.content.length > 200) {
      divHelpContent.content = divHelpContent.content.substr(0, 200) + "...";
    }
  }

  public applyFilter() {
    this.checkboxes = [];
    this.divHelpContents.filter(item => this.filterDivHelpContent(item, this.filters)).forEach(
      _ => {
        this.cutContent(_);
        this.checkboxes.push(<CheckDivHelpContent>{divHelpContent: _, checked: false})
      }
    );
    this.countDivHelpContents();
  }

  public filterByPage(value: any) {
    this.filters.id = value;
    this.applyFilter();
  }

  public displayAllDivHelpContents() {
    this.filters.active = null;
    this.applyFilter();
  }

  public displayActiveDivHelpContents() {
    this.filters.active = true;
    this.applyFilter();
  }

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

  public displayInactiveDivHelpContents() {
    this.filters.active = false;
    this.applyFilter();
  }

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

    this.showLoading = false;
  }

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

    this.showLoading = false;
  }

  public newClassContent() {
    if (this.selectedPageId) {
      this.router.navigate(['/classContents/new'], {
        queryParams: {
          communityId: this.selectedCommunityPid,
          pageId: this.selectedPageId
        }
      });
    } else {
      this.router.navigate(['/classContents/new'], {queryParams: {communityId: this.selectedCommunityPid}});
    }
  }
}