import { Component, Input, OnInit, ComponentFactoryResolver, ViewChild, SimpleChanges, ComponentFactory, Inject, Type} from '@angular/core';
import { IItem } from '@farmmaps/common';
import { AbstractSelectedItemComponent, SelectedItemComponent  } from '../selected-item/selected-item.component';
import { WidgetHostDirective } from '../widget-host/widget-host.directive';


@Component({
  selector: 'fm-map-selected-item-container',
  templateUrl: './selected-item-container.component.html',
  styleUrls: ['./selected-item-container.component.scss'] 
})
export class SelectedItemContainerComponent {

  constructor(private componentFactoryResolver: ComponentFactoryResolver, @Inject(AbstractSelectedItemComponent) public selectedItemComponents: AbstractSelectedItemComponent[] ) {
  }

  @Input() item: IItem;

  @ViewChild(WidgetHostDirective, { static: true }) widgetHost: WidgetHostDirective; 

  loadComponent() {
    var componentFactory: ComponentFactory<AbstractSelectedItemComponent> = this.componentFactoryResolver.resolveComponentFactory(SelectedItemComponent); // default
    for (var i = 0; i < this.selectedItemComponents.length; i++) {
      if (this.selectedItemComponents[i]['forItemType'] == this.item.itemType) {
        componentFactory = this.componentFactoryResolver.resolveComponentFactory(this.selectedItemComponents[i]['constructor'] as any);
      }
    }    
    const viewContainerRef = this.widgetHost.viewContainerRef;
    viewContainerRef.clear();

    const componentRef = viewContainerRef.createComponent(componentFactory);
    (<AbstractSelectedItemComponent>componentRef.instance).item = this.item;
  }

  ngOnChanges(changes: SimpleChanges) {
    if (changes["item"] && changes["item"].currentValue) {
        this.loadComponent();
    }
  }
}