import { IRegion } from '../IRegion';
import { RegionAdapterBase } from '../RegionAdapterBase';
import { IRegionBehaviorFactory } from '../IRegionBehaviorFactory';
import { injectable, inject } from 'tsyringe';
import { regionBehaviorFactoryInjectionToken } from '../injectionTokens';
import { SelectorModel } from '../../models/SelectorModel';
import { Region } from '../Region';
import { SelectorItemsSourceSyncBehavior } from './behaviors/SelectorItemsSourceSyncBehavior';

/**
 *  Adapter for selector control
 *  Allows the use of selector control to host regions
 *
 * @export
 * @class AdapterForSelectorControl
 * @extends {RegionAdapterBase<SelectorModel>}
 * @wType Microsoft.Practices.Prism.Regions.SelectorRegionAdapter
 */
@injectable()
export class AdapterForSelectorControl extends RegionAdapterBase<SelectorModel> {
  /**
   * Creates an instance of AdapterForSelectorControl.
   * @param {IRegionBehaviorFactory} factory
   * @memberof AdapterForSelectorControl
   */
  constructor(
    @inject(regionBehaviorFactoryInjectionToken) factory: IRegionBehaviorFactory
  ) {
    super(factory);
  }

  /**
   * Adapts the selector control with the specific region
   *
   * @protected
   * @param {IRegion} region  region to adapt
   * @param {SelectorModel} regionTarget  selector control to adapt
   * @memberof AdapterForSelectorControl
   */
  protected Adapt(region: IRegion, regionTarget: SelectorModel): void {}

  /**
   * Attach the behavior to the region target element
   *
   * @param {IRegion} region
   * @param {SelectorModel} regionTarget
   * @memberof AdapterForSelectorControl
   */
  public AttachBehaviors(region: IRegion, regionTarget: SelectorModel): void {
    if (region == null) {
      throw new Error('Null value for region argument');
    }
    if (
      !region.Behaviors.ContainsKey(SelectorItemsSourceSyncBehavior.BehaviorKey)
    ) {
      region.Behaviors.Add(
        SelectorItemsSourceSyncBehavior.BehaviorKey,
        Object.assign(new SelectorItemsSourceSyncBehavior(), {
          HostControl: regionTarget,
        })
      );
    }
    super.AttachBehaviors(region, regionTarget);
  }

  /**
   * Creates the region for the selector host control
   *
   * @protected
   * @returns {IRegion}
   * @memberof AdapterForSelectorControl
   */
  protected CreateRegion(): IRegion {
    return new Region();
  }
}