import {Component, OnInit} from '@angular/core';
import {ActivatedRoute, Router} from '@angular/router';
import {FormBuilder, FormGroup, Validators} from '@angular/forms';
import {Page} from '../../utils/entities/adminTool/page';
import {HelpContentService} from '../../services/help-content.service';
import {EnvProperties} from '../../utils/properties/env-properties';
import {properties} from '../../../../environments/environment';
import {Subscriber, Subscription, zip} from 'rxjs';
import {DivHelpContent} from '../../utils/entities/adminTool/div-help-content';
import {NotificationHandler} from "../../utils/notification-handler";
import {ClearCacheService} from "../../services/clear-cache.service";

@Component({
  selector: 'class-content-form',
  templateUrl: './class-help-content-form.component.html',
})
export class ClassContentFormComponent implements OnInit {
  
  myForm: FormGroup;
  portal: string;
  parentClass: string;
  pageId: string;
  pageContentId: string;
  page: Page;
  classOptions = [];
  public properties: EnvProperties = properties;
  public showLoading: boolean = true;
  private subs: Subscription[] = [];
  public pageHelpContent: DivHelpContent;
  
  constructor(private route: ActivatedRoute, private _router: Router, private _fb: FormBuilder,
              private _helpContentService: HelpContentService, private _clearCacheService: ClearCacheService) {
  }
  
  ngOnInit() {
    this.portal = (this.route.snapshot.data.portal) ? this.route.snapshot.data.portal : this.route.snapshot.params[this.route.snapshot.data.param];
    this.parentClass = this.route.snapshot.data.parentClass;
    this.subs.push(this.route.queryParams.subscribe(params => {
        this.pageId = params['pageId'];
        this.myForm = this.form;
        this.pageContentId = params['pageContentId'];
        if (!this.pageId) {
          this._router.navigate(['../'], {relativeTo: this.route});
        }
        this.getInfo(this.pageId);
      }));
  }
  
  ngOnDestroy() {
    this.subs.forEach(value => {
      if (value instanceof Subscriber) {
        value.unsubscribe();
      }
    });
  }
  
  getInfo(pageId: string) {
    this.showLoading = true;
    let obs = zip(this._helpContentService.getPageByPortal(pageId, this.properties.adminToolsAPIURL, this.portal),
      this._helpContentService.getDivIdsFullByPortal(pageId, this.properties.adminToolsAPIURL, this.portal));
    this.subs.push(obs.subscribe(
      results => {
        this.page = results[0];
        if (this.properties.adminToolsPortalType != this.page.portalType) {
          this._router.navigate(['../'], {relativeTo: this.route});
        }
        this.setOptions(results[1]);
        if (!this.pageContentId) {
         this.updateForm(null);
          this.showLoading = false;
        } else {
          this.subs.push(this._helpContentService.getDivHelpContent( this.pageContentId, this.properties.adminToolsAPIURL, this.portal).subscribe(pageHelpContent=>{
            this.pageHelpContent = pageHelpContent;
            if (this.properties.adminToolsPortalType != this.page.portalType) {
              this._router.navigate(['../'], {relativeTo: this.route});
            }
            this.updateForm(this.pageHelpContent);
            this.showLoading = false;
          },
            error => {
            this.handleError('System error retrieving content by id '+ this.pageContentId, error)
          }));
        }
      }));

  }

  private updateForm(pageHelpContent: DivHelpContent) {
    this.pageHelpContent = pageHelpContent;
    this.myForm = this.form;
    if (this.pageHelpContent) {
      this.myForm.patchValue((pageHelpContent));
      this.myForm.get('divId').disable();
    }
    this.myForm.markAsPristine();
    
  }

  
  public setOptions(divIds) {
    this.classOptions = [];
    for(let divid of divIds){
      this.classOptions.push({label:divid.name, value:divid._id});
    }

  }
  
  public get form() {
    return this._fb.group({
      divId: ['', Validators.required],
      content: ['', Validators.required],
      isActive: true,
      portal: this.portal,
      _id : '',
    });

  }
  
  public reset() {
    this.myForm.patchValue({
      divId: ['', Validators.required],
      content: ['', Validators.required],
      isActive: true,
      portal: '',
      _id : '',
    });
    this.myForm.markAsPristine();
  }
  
  handleError(message: string, error = null) {
    if(error) {
      console.error('Server responded: ' + error);
    }
    NotificationHandler.rise(message, 'danger');
    this.showLoading = false;
  }
  
  public saveCustom() {
    if (this.myForm.valid) {
      this.showLoading = true;
      let pageHelpContent: DivHelpContent = this.myForm.getRawValue();
      this.subs.push(this._helpContentService.insertOrUpdateDivHelpContent(pageHelpContent, this.properties.adminToolsAPIURL, this.portal).subscribe(
        _ => {
          this._router.navigate(['../'], {queryParams: {"pageId": this.pageId}, relativeTo: this.route});
          NotificationHandler.rise('Page content has been <b>successfully updated</b>');
          this.showLoading = false;
          this._clearCacheService.clearCache("Class help text saved or updated");
        },
        err => this.handleUpdateError('System error saving page content', err)
      ));
    } else {
      this.showLoading = false;
      this.handleError('Please fill all required fields');
    }
  }

  public resetCustom() {
    this.showLoading = true;
    this.updateForm(this.pageHelpContent);
    this.showLoading = false;
  }
  
  handleUpdateError(message: string, error) {
    console.error('Server responded: ' + error);
    NotificationHandler.rise(message, 'danger');
    this.showLoading = false;
  }
  
  changeStatus() {
    this.myForm.get('isActive').setValue(!this.myForm.get('isActive').value);
    if (this.pageHelpContent && this.myForm.get('isActive').value != this.pageHelpContent.isActive || !this.pageHelpContent && !this.myForm.get('isActive').value) {
      this.myForm.get('isActive').markAsDirty();
    } else {
      this.myForm.get('isActive').markAsPristine()
    }
  }
  
  contentChanged() {
    if (this.pageHelpContent && this.myForm.get('content').value != this.pageHelpContent.content || !this.pageHelpContent && this.myForm.get('content').value != '') {
      this.myForm.get('content').markAsDirty();
    } else {
      this.myForm.get('content').markAsPristine()
    }
  }
}