import {
  ChangeDetectionStrategy,
  Component,
  DestroyRef,
  HostListener,
  inject,
  OnInit
} from '@angular/core';
import {NavigationStart, Router, RouterOutlet} from '@angular/router';
import {map, shareReplay, take, tap} from 'rxjs/operators';
import {AccountService} from './_services/account.service';
import {LibraryService} from './_services/library.service';
import {NavService} from './_services/nav.service';
import {NgbModal, NgbModalConfig, NgbOffcanvas, NgbRatingConfig} from '@ng-bootstrap/ng-bootstrap';
import {AsyncPipe, DOCUMENT, NgClass} from '@angular/common';
import {filter, interval, Observable, switchMap} from 'rxjs';
import {ThemeService} from "./_services/theme.service";
import {SideNavComponent} from './sidenav/_components/side-nav/side-nav.component';
import {NavHeaderComponent} from "./nav/_components/nav-header/nav-header.component";
import {takeUntilDestroyed} from "@angular/core/rxjs-interop";
import {ServerService} from "./_services/server.service";
import {OutOfDateModalComponent} from "./announcements/_components/out-of-date-modal/out-of-date-modal.component";
import {PreferenceNavComponent} from "./sidenav/preference-nav/preference-nav.component";
import {Breakpoint, UtilityService} from "./shared/_services/utility.service";
import {TranslocoService} from "@jsverse/transloco";

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.scss'],
    standalone: true,
  imports: [NgClass, SideNavComponent, RouterOutlet, AsyncPipe, NavHeaderComponent, PreferenceNavComponent],
  changeDetection: ChangeDetectionStrategy.OnPush
})
export class AppComponent implements OnInit {

  transitionState$!: Observable<boolean>;

  private readonly destroyRef = inject(DestroyRef);
  private readonly offcanvas = inject(NgbOffcanvas);
  protected readonly navService = inject(NavService);
  protected readonly utilityService = inject(UtilityService);
  protected readonly serverService = inject(ServerService);
  protected readonly accountService = inject(AccountService);
  private readonly libraryService = inject(LibraryService);
  private readonly ngbModal = inject(NgbModal);
  private readonly router = inject(Router);
  private readonly themeService = inject(ThemeService);
  private readonly document = inject(DOCUMENT);
  private readonly translocoService = inject(TranslocoService);

  protected readonly Breakpoint = Breakpoint;


  constructor(ratingConfig: NgbRatingConfig, modalConfig: NgbModalConfig) {

    modalConfig.fullscreen = 'md';

    // Setup default rating config
    ratingConfig.max = 5;
    ratingConfig.resettable = true;

    // Close any open modals when a route change occurs
    this.router.events
      .pipe(
          filter(event => event instanceof NavigationStart),
          takeUntilDestroyed(this.destroyRef)
      )
      .subscribe(async (event) => {

        if (!this.ngbModal.hasOpenModals() && !this.offcanvas.hasOpenOffcanvas()) return;

        if (this.ngbModal.hasOpenModals()) {
          this.ngbModal.dismissAll();
        }

        if (this.offcanvas.hasOpenOffcanvas()) {
          this.offcanvas.dismiss();
        }

        if ((event as any).navigationTrigger === 'popstate') {
          const currentRoute = this.router.routerState;
          await this.router.navigateByUrl(currentRoute.snapshot.url, { skipLocationChange: true });
        }
      });


    this.transitionState$ = this.accountService.currentUser$.pipe(
      map((user) => {
      if (!user) return false;
      return user.preferences.noTransitions;
    }), takeUntilDestroyed(this.destroyRef));


  }

  @HostListener('window:resize', ['$event'])
  @HostListener('window:orientationchange', ['$event'])
  setDocHeight() {
    // Sets a CSS variable for the actual device viewport height. Needed for mobile dev.
    const vh = window.innerHeight * 0.01;
    this.document.documentElement.style.setProperty('--vh', `${vh}px`);
    this.utilityService.activeBreakpointSource.next(this.utilityService.getActiveBreakpoint());
  }

  ngOnInit(): void {
    this.setDocHeight();
    this.setCurrentUser();
    this.themeService.setColorScape('');
  }


  setCurrentUser() {
    const user = this.accountService.getUserFromLocalStorage();
    this.accountService.setCurrentUser(user);

    if (!user) return;

    // Bootstrap anything that's needed
    this.themeService.getThemes().subscribe();
    this.libraryService.getLibraryNames().pipe(take(1), shareReplay({refCount: true, bufferSize: 1})).subscribe();

    // Get the server version, compare vs localStorage, and if different bust locale cache
    const versionKey = 'kavita--version';
    this.serverService.getVersion(user.apiKey).subscribe(version => {
      const cachedVersion = localStorage.getItem(versionKey);
      console.log('Kavita version: ', version, ' Running version: ', cachedVersion);

      if (cachedVersion == null || cachedVersion != version) {
        // Bust locale cache
        this.bustLocaleCache();
        localStorage.setItem(versionKey, version);
        location.reload();
      }
      localStorage.setItem(versionKey, version);
    });

    // Every hour, have the UI check for an update. People seriously stay out of date
    interval(2* 60 * 60 * 1000) // 2 hours in milliseconds
      .pipe(
        switchMap(() => this.accountService.currentUser$),
        filter(u => u !== undefined && this.accountService.hasAdminRole(u)),
        switchMap(_ => this.serverService.checkHowOutOfDate()),
        filter(versionOutOfDate => {
          return !isNaN(versionOutOfDate) && versionOutOfDate > 2;
        }),
        tap(versionOutOfDate => {
          if (!this.ngbModal.hasOpenModals()) {
            const ref = this.ngbModal.open(OutOfDateModalComponent, {size: 'xl', fullscreen: 'md'});
            ref.componentInstance.versionsOutOfDate = versionOutOfDate;
          }
        })
      )
      .subscribe();
  }

  private bustLocaleCache() {
    localStorage.removeItem('@transloco/translations/timestamp');
    localStorage.removeItem('@transloco/translations');
    localStorage.removeItem('translocoLang');
    (this.translocoService as any).cache.delete(localStorage.getItem('kavita-locale') || 'en');
    (this.translocoService as any).cache.clear();
  }
}