import {
  ChangeDetectionStrategy,
  ChangeDetectorRef,
  Component,
  DestroyRef, HostListener,
  inject,
  OnInit
} from '@angular/core';
import { NgbModal, NgbTooltip } from '@ng-bootstrap/ng-bootstrap';
import { ToastrService } from 'ngx-toastr';
import { distinctUntilChanged, filter, take } from 'rxjs/operators';
import { ConfirmService } from 'src/app/shared/confirm.service';
import { LibrarySettingsModalComponent } from 'src/app/sidenav/_modals/library-settings-modal/library-settings-modal.component';
import { NotificationProgressEvent } from 'src/app/_models/events/notification-progress-event';
import { ScanSeriesEvent } from 'src/app/_models/events/scan-series-event';
import { Library } from 'src/app/_models/library/library';
import { LibraryService } from 'src/app/_services/library.service';
import { EVENTS, Message, MessageHubService } from 'src/app/_services/message-hub.service';
import {takeUntilDestroyed} from "@angular/core/rxjs-interop";
import { SentenceCasePipe } from '../../_pipes/sentence-case.pipe';
import { TimeAgoPipe } from '../../_pipes/time-ago.pipe';
import { LibraryTypePipe } from '../../_pipes/library-type.pipe';
import { RouterLink } from '@angular/router';
import {translate, TranslocoModule} from "@jsverse/transloco";
import {DefaultDatePipe} from "../../_pipes/default-date.pipe";
import {AsyncPipe, TitleCasePipe} from "@angular/common";
import {DefaultValuePipe} from "../../_pipes/default-value.pipe";
import {LoadingComponent} from "../../shared/loading/loading.component";
import {TagBadgeComponent} from "../../shared/tag-badge/tag-badge.component";
import {UtcToLocalTimePipe} from "../../_pipes/utc-to-local-time.pipe";
import {Breakpoint, UtilityService} from "../../shared/_services/utility.service";
import {Action, ActionFactoryService, ActionItem} from "../../_services/action-factory.service";
import {ActionService} from "../../_services/action.service";
import {CardActionablesComponent} from "../../_single-module/card-actionables/card-actionables.component";
import {BehaviorSubject, Observable} from "rxjs";

@Component({
    selector: 'app-manage-library',
    templateUrl: './manage-library.component.html',
    styleUrls: ['./manage-library.component.scss'],
    changeDetection: ChangeDetectionStrategy.OnPush,
    standalone: true,
  imports: [RouterLink, NgbTooltip, LibraryTypePipe, TimeAgoPipe, SentenceCasePipe, TranslocoModule, DefaultDatePipe, AsyncPipe, DefaultValuePipe, LoadingComponent, TagBadgeComponent, TitleCasePipe, UtcToLocalTimePipe, CardActionablesComponent]
})
export class ManageLibraryComponent implements OnInit {

  private readonly libraryService = inject(LibraryService);
  private readonly modalService = inject(NgbModal);
  private readonly toastr = inject(ToastrService);
  private readonly confirmService = inject(ConfirmService);
  private readonly hubService = inject(MessageHubService);
  private readonly cdRef = inject(ChangeDetectorRef);
  private readonly destroyRef = inject(DestroyRef);
  protected readonly utilityService = inject(UtilityService);
  private readonly actionFactoryService = inject(ActionFactoryService);
  private readonly actionService = inject(ActionService);

  protected readonly Breakpoint = Breakpoint;

  actions = this.actionFactoryService.getLibraryActions(this.handleAction.bind(this));
  libraries: Library[] = [];
  loading = false;
  /**
   * If a deletion is in progress for a library
   */
  deletionInProgress: boolean = false;
  useActionableSource = new BehaviorSubject<boolean>(this.utilityService.getActiveBreakpoint() <= Breakpoint.Tablet);
  useActionables$: Observable<boolean> = this.useActionableSource.asObservable();

  @HostListener('window:resize', ['$event'])
  @HostListener('window:orientationchange', ['$event'])
  onResize(){
    this.useActionableSource.next(this.utilityService.getActiveBreakpoint() <= Breakpoint.Tablet);
  }

  ngOnInit(): void {
    this.getLibraries();

    // when a progress event comes in, show it on the UI next to library
    this.hubService.messages$.pipe(takeUntilDestroyed(this.destroyRef),
      filter(event => event.event === EVENTS.ScanSeries || event.event === EVENTS.NotificationProgress),
      distinctUntilChanged((prev: Message<ScanSeriesEvent | NotificationProgressEvent>, curr: Message<ScanSeriesEvent | NotificationProgressEvent>) =>
        this.hasMessageChanged(prev, curr)))
      .subscribe((event: Message<ScanSeriesEvent | NotificationProgressEvent>) => {
        let libId = 0;
        if (event.event === EVENTS.ScanSeries) {
          libId = (event.payload as ScanSeriesEvent).libraryId;
        } else {
          if ((event.payload as NotificationProgressEvent).body.hasOwnProperty('libraryId')) {
            libId = (event.payload as NotificationProgressEvent).body.libraryId;
          }
        }

        this.libraryService.getLibraries().pipe(take(1)).subscribe(libraries => {
          const newLibrary = libraries.find(lib => lib.id === libId);
          const existingLibrary = this.libraries.find(lib => lib.id === libId);
          if (existingLibrary !== undefined) {
            existingLibrary.lastScanned = newLibrary?.lastScanned || existingLibrary.lastScanned;
            this.cdRef.markForCheck();
          }
        });
    });
  }

  hasMessageChanged(prev: Message<ScanSeriesEvent | NotificationProgressEvent>, curr: Message<ScanSeriesEvent | NotificationProgressEvent>) {
    if (curr.event !== prev.event) return true;
    if (curr.event === EVENTS.ScanSeries) {
      return (prev.payload as ScanSeriesEvent).libraryId === (curr.payload as ScanSeriesEvent).libraryId;
    }
    if (curr.event === EVENTS.NotificationProgress) {
      return (prev.payload as NotificationProgressEvent).eventType != (curr.payload as NotificationProgressEvent).eventType;
    }
    return false;
  }

  getLibraries() {
    this.loading = true;
    this.cdRef.markForCheck();
    this.libraryService.getLibraries().pipe(take(1), takeUntilDestroyed(this.destroyRef)).subscribe(libraries => {
      this.libraries = [...libraries];
      this.loading = false;
      this.cdRef.markForCheck();
    });
  }

  editLibrary(library: Library) {
    const modalRef = this.modalService.open(LibrarySettingsModalComponent, {  size: 'xl', fullscreen: 'md' });
    modalRef.componentInstance.library = library;
    modalRef.closed.pipe(takeUntilDestroyed(this.destroyRef)).subscribe(refresh => {
      if (refresh) {
        this.getLibraries();
      }
    });
  }

  addLibrary() {
    const modalRef = this.modalService.open(LibrarySettingsModalComponent, {  size: 'xl', fullscreen: 'md' });
    modalRef.closed.pipe(takeUntilDestroyed(this.destroyRef)).subscribe(refresh => {
      if (refresh) {
        this.getLibraries();
      }
    });
  }

  async deleteLibrary(library: Library) {
    if (await this.confirmService.confirm(translate('toasts.confirm-library-delete', {name: library.name}))) {
      this.deletionInProgress = true;
      this.libraryService.delete(library.id).pipe(take(1)).subscribe(() => {
        this.deletionInProgress = false;
        this.cdRef.markForCheck();
        this.getLibraries();
        this.toastr.success(translate('toasts.library-deleted', {name: library.name}));
      });
    }
  }

  async scanLibrary(library: Library) {
    await this.actionService.scanLibrary(library);
  }

  async handleAction(action: ActionItem<Library>, library: Library) {
    switch (action.action) {
      case(Action.Scan):
        await this.actionService.scanLibrary(library);
        break;
      case(Action.RefreshMetadata):
        await this.actionService.refreshLibraryMetadata(library);
        break;
      case(Action.GenerateColorScape):
        await this.actionService.refreshLibraryMetadata(library, undefined, false, true);
        break;
      case(Action.Edit):
        this.editLibrary(library)
        break;
      case (Action.Delete):
        await this.deleteLibrary(library);
        break;
      default:
        break;
    }
  }

  performAction(action: ActionItem<Library>, library: Library) {
    if (typeof action.callback === 'function') {
      action.callback(action, library);
    }
  }
}