/** Angular Imports */
import { Component, OnInit, TemplateRef, ElementRef, ViewChild, AfterViewInit} from '@angular/core';
import { ActivatedRoute, Router, NavigationEnd } from '@angular/router';
import { FormControl } from '@angular/forms';
import { MatDialog } from '@angular/material/dialog';

/** rxjs Imports */
import { Observable } from 'rxjs';
import { startWith, map } from 'rxjs/operators';

/** Custom Imports. */
import { activities } from './activities';

/** Custom Services */
import { AuthenticationService } from '../core/authentication/authentication.service';
import { PopoverService } from '../configuration-wizard/popover/popover.service';
import { ConfigurationWizardService } from '../configuration-wizard/configuration-wizard.service';

/** Custom Components */
import { NextStepDialogComponent } from '../configuration-wizard/next-step-dialog/next-step-dialog.component';

/**
 * Home component.
 */
@Component({
  selector: 'mifosx-home',
  templateUrl: './home.component.html',
  styleUrls: ['./home.component.scss']
})
export class HomeComponent implements OnInit, AfterViewInit {

  /** Username of authenticated user. */
  username: string;
  /** Activity Form. */
  activityForm: any;
  /** Search Text. */
  searchText: FormControl = new FormControl();
  /** Filtered Activities. */
  filteredActivities: Observable<any[]>;
  /** All User Activities. */
  allActivities: any[] = activities;

  /* Reference of dashboard button */
  @ViewChild('buttonDashboard', {static: false}) buttonDashboard: ElementRef<any>;
  /* Template for popover on dashboard button */
  @ViewChild('templateButtonDashboard', {static: false}) templateButtonDashboard: TemplateRef<any>;
  /* Reference of search activity */
  @ViewChild('searchActivity', {static: false}) searchActivity: ElementRef<any>;
  /* Template for popover on search activity */
  @ViewChild('templateSearchActivity', {static: false}) templateSearchActivity: TemplateRef<any>;

  /**
   * @param {AuthenticationService} authenticationService Authentication Service.
   * @param {ActivatedRoute} activatedRoute ActivatedRoute.
   * @param {Router} router Router.
   * @param {MatDialog} dialog MatDialog.
   * @param {ConfigurationWizardService} configurationWizardService ConfigurationWizard Service.
   * @param {PopoverService} popoverService PopoverService.
   */
  constructor(private authenticationService: AuthenticationService,
              private activatedRoute: ActivatedRoute,
              private router: Router,
              private dialog: MatDialog,
              private configurationWizardService: ConfigurationWizardService,
              private popoverService: PopoverService) { }

  /**
   * Sets the username of the authenticated user.
   * Set Form.
   */
  ngOnInit() {
    const credentials = this.authenticationService.getCredentials();
    this.username = credentials.username;
    this.setFilteredActivities();
  }

  /**
   * Sets filtered activities for autocomplete.
   */
  setFilteredActivities() {
    this.filteredActivities = this.searchText.valueChanges
    .pipe(
      map((activity: any) => typeof activity === 'string' ? activity : activity.activity),
      map((activityName: string) => activityName ? this.filterActivity(activityName) : this.allActivities));
  }

  /**
   * Filters activities.
   * @param activityName Activity name to filter activity by.
   * @returns {any} Filtered activities.
   */
  private filterActivity(activityName: string): any {
    const filterValue = activityName.toLowerCase();
    return this.allActivities.filter(activity => activity.activity.toLowerCase().indexOf(filterValue) === 0);
  }

  /**
   * Popover function
   * @param template TemplateRef<any>.
   * @param target HTMLElement | ElementRef<any>.
   * @param position String.
   * @param backdrop Boolean.
   */
  showPopover(template: TemplateRef<any>, target: HTMLElement | ElementRef<any>, position: string, backdrop: boolean): void {
    setTimeout(() => this.popoverService.open(template, target, position, backdrop, {}), 200);
  }

  /**
   * To show popover.
   */
  ngAfterViewInit() {
    if (this.configurationWizardService.showHome === true) {
      setTimeout(() => {
        this.showPopover(this.templateButtonDashboard, this.buttonDashboard.nativeElement, 'bottom', true);
      });
    }
    if (this.configurationWizardService.showHomeSearchActivity === true) {
      setTimeout(() => {
        this.showPopover(this.templateSearchActivity, this.searchActivity.nativeElement, 'bottom', true);
      });
    }
  }

  /**
   * Open Dialog for next step.
   * Next Step (Organization) Configuration Wizard.
   */
  nextStep() {
    this.configurationWizardService.showHome = false;
    this.configurationWizardService.showHomeSearchActivity = false;
    this.openNextStepDialog();
  }

  /**
   * Next Step (Organization) Dialog Configuration Wizard.
   */
  openNextStepDialog() {
    const nextStepDialogRef = this.dialog.open( NextStepDialogComponent, {
      data: {
        nextStepName: 'Setup Organization',
        previousStepName: 'Home Tour',
        stepPercentage: 10
      },
    });
    nextStepDialogRef.afterClosed().subscribe((response: { nextStep: boolean }) => {
    if (response.nextStep) {
      this.configurationWizardService.showHome = false;
      this.configurationWizardService.showHomeSearchActivity = false;
      this.configurationWizardService.showCreateOffice = true;
      this.router.navigate(['/organization']);
      } else {
      this.configurationWizardService.showHome = false;
      this.configurationWizardService.showHomeSearchActivity = false;
      this.router.navigate(['/home']);
      }
    });
  }

  /**
   * Previous Step (Breadcrumbs) Configuration Wizard.
   */
  previousStep() {
    this.configurationWizardService.showHome = false;
    this.configurationWizardService.showHomeSearchActivity = false;
    this.configurationWizardService.showBreadcrumbs = true;
    this.router.routeReuseStrategy.shouldReuseRoute = () => false;
    this.router.onSameUrlNavigation = 'reload';
    this.router.navigate(['/home']);
  }
}