import {
  Component,
  OnDestroy,
  OnInit,
  QueryList,
  ViewChild,
  ViewChildren,
} from '@angular/core'
import { ActivatedRoute, Router } from '@angular/router'
import { NgbModal } from '@ng-bootstrap/ng-bootstrap'
import { Subscription } from 'rxjs'
import { FilterRule, isFullTextFilterRule } from 'src/app/data/filter-rule'
import { FILTER_FULLTEXT_MORELIKE } from 'src/app/data/filter-rule-type'
import { PaperlessDocument } from 'src/app/data/paperless-document'
import { PaperlessSavedView } from 'src/app/data/paperless-saved-view'
import {
  SortableDirective,
  SortEvent,
} from 'src/app/directives/sortable.directive'
import { ConsumerStatusService } from 'src/app/services/consumer-status.service'
import { DocumentListViewService } from 'src/app/services/document-list-view.service'
import {
  DOCUMENT_SORT_FIELDS,
  DOCUMENT_SORT_FIELDS_FULLTEXT,
} from 'src/app/services/rest/document.service'
import { SavedViewService } from 'src/app/services/rest/saved-view.service'
import { ToastService } from 'src/app/services/toast.service'
import { FilterEditorComponent } from './filter-editor/filter-editor.component'
import { SaveViewConfigDialogComponent } from './save-view-config-dialog/save-view-config-dialog.component'

@Component({
  selector: 'app-document-list',
  templateUrl: './document-list.component.html',
  styleUrls: ['./document-list.component.scss'],
})
export class DocumentListComponent implements OnInit, OnDestroy {
  constructor(
    public list: DocumentListViewService,
    public savedViewService: SavedViewService,
    public route: ActivatedRoute,
    private router: Router,
    private toastService: ToastService,
    private modalService: NgbModal,
    private consumerStatusService: ConsumerStatusService
  ) {}

  @ViewChild('filterEditor')
  private filterEditor: FilterEditorComponent

  @ViewChildren(SortableDirective) headers: QueryList<SortableDirective>

  displayMode = 'smallCards' // largeCards, smallCards, details

  unmodifiedFilterRules: FilterRule[] = []

  private consumptionFinishedSubscription: Subscription

  get isFiltered() {
    return this.list.filterRules?.length > 0
  }

  getTitle() {
    return this.list.activeSavedViewTitle || $localize`Documents`
  }

  getSortFields() {
    return isFullTextFilterRule(this.list.filterRules)
      ? DOCUMENT_SORT_FIELDS_FULLTEXT
      : DOCUMENT_SORT_FIELDS
  }

  onSort(event: SortEvent) {
    this.list.setSort(event.column, event.reverse)
  }

  get isBulkEditing(): boolean {
    return this.list.selected.size > 0
  }

  saveDisplayMode() {
    localStorage.setItem('document-list:displayMode', this.displayMode)
  }

  ngOnInit(): void {
    if (localStorage.getItem('document-list:displayMode') != null) {
      this.displayMode = localStorage.getItem('document-list:displayMode')
    }
    this.consumptionFinishedSubscription = this.consumerStatusService
      .onDocumentConsumptionFinished()
      .subscribe(() => {
        this.list.reload()
      })
    this.route.paramMap.subscribe((params) => {
      if (params.has('id')) {
        this.savedViewService.getCached(+params.get('id')).subscribe((view) => {
          if (!view) {
            this.router.navigate(['404'])
            return
          }
          this.list.activateSavedView(view)
          this.list.reload()
          this.unmodifiedFilterRules = view.filter_rules
        })
      } else {
        this.list.activateSavedView(null)
        this.list.reload()
        this.unmodifiedFilterRules = []
      }
    })
  }

  ngOnDestroy() {
    if (this.consumptionFinishedSubscription) {
      this.consumptionFinishedSubscription.unsubscribe()
    }
  }

  loadViewConfig(view: PaperlessSavedView) {
    this.list.loadSavedView(view)
    this.list.reload()
  }

  saveViewConfig() {
    if (this.list.activeSavedViewId != null) {
      let savedView: PaperlessSavedView = {
        id: this.list.activeSavedViewId,
        filter_rules: this.list.filterRules,
        sort_field: this.list.sortField,
        sort_reverse: this.list.sortReverse,
      }
      this.savedViewService.patch(savedView).subscribe((result) => {
        this.toastService.showInfo(
          $localize`View "${this.list.activeSavedViewTitle}" saved successfully.`
        )
        this.unmodifiedFilterRules = this.list.filterRules
      })
    }
  }

  saveViewConfigAs() {
    let modal = this.modalService.open(SaveViewConfigDialogComponent, {
      backdrop: 'static',
    })
    modal.componentInstance.defaultName = this.filterEditor.generateFilterName()
    modal.componentInstance.saveClicked.subscribe((formValue) => {
      modal.componentInstance.buttonsEnabled = false
      let savedView: PaperlessSavedView = {
        name: formValue.name,
        show_on_dashboard: formValue.showOnDashboard,
        show_in_sidebar: formValue.showInSideBar,
        filter_rules: this.list.filterRules,
        sort_reverse: this.list.sortReverse,
        sort_field: this.list.sortField,
      }

      this.savedViewService.create(savedView).subscribe(
        () => {
          modal.close()
          this.toastService.showInfo(
            $localize`View "${savedView.name}" created successfully.`
          )
        },
        (error) => {
          modal.componentInstance.error = error.error
          modal.componentInstance.buttonsEnabled = true
        }
      )
    })
  }

  toggleSelected(document: PaperlessDocument, event: MouseEvent): void {
    if (!event.shiftKey) this.list.toggleSelected(document)
    else this.list.selectRangeTo(document)
  }

  clickTag(tagID: number) {
    this.list.selectNone()
    setTimeout(() => {
      this.filterEditor.addTag(tagID)
    })
  }

  clickCorrespondent(correspondentID: number) {
    this.list.selectNone()
    setTimeout(() => {
      this.filterEditor.addCorrespondent(correspondentID)
    })
  }

  clickDocumentType(documentTypeID: number) {
    this.list.selectNone()
    setTimeout(() => {
      this.filterEditor.addDocumentType(documentTypeID)
    })
  }

  clickMoreLike(documentID: number) {
    this.list.quickFilter([
      { rule_type: FILTER_FULLTEXT_MORELIKE, value: documentID.toString() },
    ])
  }

  trackByDocumentId(index, item: PaperlessDocument) {
    return item.id
  }
}