import {Component, ViewChild, OnInit, ElementRef} from '@angular/core';
import {FormBuilder, FormControl, FormGroup} from "@angular/forms";
import {ActivatedRoute, Router} from "@angular/router";
import {HelpContentService} from "../../services/help-content.service";
import {
  PageHelpContent,
  CheckPageHelpContent,
  PageHelpContentFilterOptions
} from "../../utils/entities/adminTool/page-help-content";
import {Page} from "../../utils/entities/adminTool/page";
import {Community} from "../../utils/entities/adminTool/community";
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: 'page-help-contents',
  templateUrl: './page-help-contents.component.html',
})

export class PageHelpContentsComponent implements OnInit {

  @ViewChild('AlertModalDeletePageHelpContents') alertModalDeletePageHelpContents;
  private selectedPageContents: string[] = [];

  public checkboxes: CheckPageHelpContent[] = [];

  public pageHelpContents: PageHelpContent[] = [];

  public formGroup: FormGroup;

  public pages: Page[];

  public checkboxAll: boolean = false;

  public filters: PageHelpContentFilterOptions = {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);
          }
        });
      });
    // this.myForm = this.formComponent.form;
  }

  constructor(private element: ElementRef, private route: ActivatedRoute, private router: Router, private _helpService: HelpContentService, 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(['/pageContents'], {queryParams: {"communityId": this.selectedCommunityPid}});
          } else {
            this.page = page;
            this.getPageHelpContents(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.getCommunityPages(community_pid, "", this.properties.adminToolsAPIURL).subscribe(
      this._helpService.getPages(this.properties.adminToolsAPIURL, community_pid, true).subscribe(
        pages => {
          this.pages = pages;
          this.getPageHelpContents(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 countPageHelpContents() {
    this.counter = {all: 0, active: 0, inactive: 0};
    let filter = Object.assign({}, this.filters);
    filter.active = null;
    this.pageHelpContents.forEach(_ => {
      if (this.filterPageHelpContent(_, filter)) {
        if (_.isActive == true) this.counter.active++;
        else this.counter.inactive++
      }
    });
    this.counter.all = this.counter.active + this.counter.inactive;
  }

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

          for (let i = this.pageHelpContents.length - 1; i >= 0; i -= 1) {
            //for (let i = 0; i < this.pageHelpContents.length; i++) {
            let page: Page = this.pageHelpContents[i].page as Page;
            if (!this.selectedPageId || (page._id == this.selectedPageId)) {
              this.cutContent(this.pageHelpContents[i]);
              this.checkboxes.unshift(<CheckPageHelpContent>{
                pageHelpContent: this.pageHelpContents[i],
                checked: false
              });
            } else {
              this.pageHelpContents.splice(i, 1);
            }
          }

          this.countPageHelpContents();

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

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

  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 getSelectedPageHelpContents(): string[] {
    return this.checkboxes.filter(pageHelpContent => pageHelpContent.checked == true)
      .map(checkedPageHelpContent => checkedPageHelpContent.pageHelpContent).map(res => res._id);
  }

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

  public confirmDeleteSelectedPageHelpContents() {
    //this.deleteConfirmationModal.ids = this.getSelectedPageHelpContents();
    //this.deleteConfirmationModal.showModal();
    this.selectedPageContents = this.getSelectedPageHelpContents();
    this.confirmModalOpen();
  }

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

  public confirmedDeletePageHelpContents(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.deletePageHelpContents(this.selectedPageContents, this.properties.adminToolsAPIURL).subscribe(
        _ => {
          this.deletePageHelpContentsFromArray(this.selectedPageContents);
          this.showLoading = false;
        },
        error => this.handleUpdateError('System error deleting the selected page content(s)', error)
      );
    }
  }

  private deletePageHelpContentsFromArray(ids: string[]): void {
    for (let id of ids) {
      let iqc = this.checkboxes.findIndex(_ => _.pageHelpContent._id == id);
      let iq = this.pageHelpContents.findIndex(_ => _._id == id);
      this.checkboxes.splice(iqc, 1);
      this.pageHelpContents.splice(iqc, 1);
    }
    this.countPageHelpContents();
  }

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

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

  public pageHelpContentSavedSuccessfully(pageHelpContent: PageHelpContent) {
    this.cutContent(pageHelpContent);
    this.checkboxes.push(<CheckPageHelpContent>{pageHelpContent: pageHelpContent, checked: false});
    this.pageHelpContents.push(pageHelpContent);
    this.applyCheck(false);
    this.countPageHelpContents();
  }

  public pageHelpContentUpdatedSuccessfully(pageHelpContent: PageHelpContent) {
    this.checkboxes.find(checkItem => checkItem.pageHelpContent._id == pageHelpContent._id).pageHelpContent = pageHelpContent;
    let index = this.pageHelpContents.findIndex(checkItem => checkItem._id == pageHelpContent._id);
    this.pageHelpContents[index] = pageHelpContent;
    this.applyCheck(false);
    this.countPageHelpContents();
  }


  public filterPageHelpContent(pageHelpContent: PageHelpContent, filters: PageHelpContentFilterOptions): boolean {
    let idFlag = filters.id == '' || (<Page>pageHelpContent.page)._id == filters.id;
    let activeFlag = filters.active == null || pageHelpContent.isActive == filters.active;
    let textFlag = filters.text.toString() == '' || (pageHelpContent.content).match(filters.text) != null
      || ((<Page>pageHelpContent.page).name).match(filters.text) != null;
    return idFlag && activeFlag && textFlag;
  }

  public cutContent(pageHelpContent: PageHelpContent) {
    pageHelpContent.content = pageHelpContent.content.replace(/<[^>]*>/g, '');
    pageHelpContent.content = pageHelpContent.content.replace(/(\r\n|\n|\r| +(?= ))|\s\s+/gm, " ");

    if (pageHelpContent.content.length > 200) {
      pageHelpContent.content = pageHelpContent.content.substr(0, 200) + "...";
    }
  }

  public applyFilter() {
    this.checkboxes = [];
    this.pageHelpContents.filter(item => this.filterPageHelpContent(item, this.filters)).forEach(
      _ => {
        this.cutContent(_);
        this.checkboxes.push(<CheckPageHelpContent>{pageHelpContent: _, checked: false})
      }
    );
    this.countPageHelpContents();
  }

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

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

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

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

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