import { INotifyPropertyChanged } from '../../basecomponentmodel/INotifyPropertyChanged';
import {
  CollectionChangeAction,
  CollectionChangeInfo,
} from '../../baseframework/collections';
import { SubscriptionEvent } from '../../utils';
import { ICollectionBase } from './ICollectionBase';

/**
 * Class representing the RowBaseCollection.
 *
 * @export
 * @class RowBaseCollection
 * @implements INotifyPropertyChanged
 * @wType Infragistics.Controls.Grids.Primitives.RowBaseCollection
 */
export class RowBaseCollection implements INotifyPropertyChanged {
  /**
   * Internal actual collection
   *
   * @type {ICollectionBase<any>}
   * @memberof RowBaseCollection
   */
  private _actualCollection: ICollectionBase<any>;

  /**
   * Creates a new instance of RowBaseCollection
   *
   * @param {ICollectionBase<any>} collection
   * @memberof RowBaseCollection
   */
  constructor(collection: ICollectionBase<any>) {
    this._actualCollection = collection;
    this._actualCollection.CollectionChanged.addHandler(
      this.ActualCollection_CollectionChanged,
      this
    );
  }

  /**
   * Subscription event to notify that a property have changed
   *
   * @type {SubscriptionEvent}
   * @memberof RowBaseCollection
   */
  PropertyChanged: SubscriptionEvent<
    (o: any, args: { PropertyName: string }) => void
  > = new SubscriptionEvent();

  /**
   * Gets the collection
   *
   * @readonly
   * @type {ICollectionBase<any>}
   * @memberof RowBaseCollection
   */
  get ActualCollection(): ICollectionBase<any> {
    return this._actualCollection;
  }

  /**
   * Notify that some property have changed
   *
   * @type {any}
   * @memberof RowBaseCollection
   * @wIgnore
   */
  /* istanbul ignore next */
  OnPropertyChanged(info: { PropertyName: string }): void {
    if (this.PropertyChanged == null) {
      return;
    }
    this.PropertyChanged.fire([this, info]);
  }

  /**
   * Callback function when the actual collection have changed
   *
   * @param {any} sender
   * @param {CollectionChangeInfo} e
   * @type {void}
   * @memberof RowBaseCollection
   * @wIgnore
   */
  /* istanbul ignore next */
  ActualCollection_CollectionChanged(
    sender: any,
    e: CollectionChangeInfo
  ): void {
    if (e.action === CollectionChangeAction.Reset) {
      this.Clear();
    }
    this.OnPropertyChanged({ PropertyName: 'Count' });
  }

  /**
   * Clears collection
   *
   * @type {void}
   * @memberof RowBaseCollection
   */
  Clear(): void {
    this._actualCollection.clear();
  }
}