import {
  ChangeDetectionStrategy,
  Component,
  EventEmitter,
  Input,
  Output,
  ViewEncapsulation
} from '@angular/core';
import { SortDirection, SortOptions } from '../../core/cache/models/sort-options.model';
import { PaginatedList } from '../../core/data/paginated-list';
import { RemoteData } from '../../core/data/remote-data';
import { fadeIn } from '../animations/fade';
import { ListableObject } from '../object-collection/shared/listable-object.model';
import { PaginationComponentOptions } from '../pagination/pagination-component-options.model';
import { ViewMode } from '../../core/shared/view-mode.model';
import { Context } from '../../core/shared/context.model';
import { CollectionElementLinkType } from '../object-collection/collection-element-link.type';

@Component({
  changeDetection: ChangeDetectionStrategy.Default,
  encapsulation: ViewEncapsulation.Emulated,
  selector: 'ds-object-list',
  styleUrls: ['./object-list.component.scss'],
  templateUrl: './object-list.component.html',
  animations: [fadeIn]
})
export class ObjectListComponent {
  viewMode = ViewMode.ListElement;
  @Input() config: PaginationComponentOptions;
  @Input() sortConfig: SortOptions;
  @Input() hasBorder = false;
  @Input() hideGear = false;
  @Input() hidePagerWhenSinglePage = true;
  @Input() linkType: CollectionElementLinkType;
  @Input() context: Context;
  private _objects: RemoteData<PaginatedList<ListableObject>>;
  @Input() set objects(objects: RemoteData<PaginatedList<ListableObject>>) {
    this._objects = objects;
  }

  get objects() {
    return this._objects;
  }

  /**
   * An event fired when the page is changed.
   * Event's payload equals to the newly selected page.
   */
  @Output() change: EventEmitter<{
    pagination: PaginationComponentOptions,
    sort: SortOptions
  }> = new EventEmitter<{
    pagination: PaginationComponentOptions,
    sort: SortOptions
  }>();

  /**
   * An event fired when the page is changed.
   * Event's payload equals to the newly selected page.
   */
  @Output() pageChange: EventEmitter<number> = new EventEmitter<number>();

  /**
   * An event fired when the page wsize is changed.
   * Event's payload equals to the newly selected page size.
   */
  @Output() pageSizeChange: EventEmitter<number> = new EventEmitter<number>();

  /**
   * An event fired when the sort direction is changed.
   * Event's payload equals to the newly selected sort direction.
   */
  @Output() sortDirectionChange: EventEmitter<SortDirection> = new EventEmitter<SortDirection>();

  @Output() paginationChange: EventEmitter<SortDirection> = new EventEmitter<any>();

  /**
   * An event fired when the sort field is changed.
   * Event's payload equals to the newly selected sort field.
   */
  @Output() sortFieldChange: EventEmitter<string> = new EventEmitter<string>();
  data: any = {};

  onPageChange(event) {
    this.pageChange.emit(event);
  }

  onPageSizeChange(event) {
    this.pageSizeChange.emit(event);
  }

  onSortDirectionChange(event) {
    this.sortDirectionChange.emit(event);
  }

  onSortFieldChange(event) {
    this.sortFieldChange.emit(event);
  }

  onPaginationChange(event) {
    this.paginationChange.emit(event);
  }

}