import {ComponentFactory, Component, ComponentRef, Input, ViewContainerRef, ComponentResolver, ViewChild} from "@angular/core"

@Component({
    selector: "dcl-wrapper",
    template: `<div #target></div>`
})
export class DclWrapper
{
    @ViewChild("target", { read: ViewContainerRef }) target;
    @Input() type;
    @Input() data;
    cmpRef: ComponentRef<any>;
    private isViewInitialized: boolean = false;

    constructor(private resolver: ComponentResolver) { }

    updateComponent()
    {
        if (!this.isViewInitialized)
        {
            return;
        }
        if (this.cmpRef)
        {
            this.cmpRef.destroy();
        }
        this.resolver.resolveComponent(this.type).then((factory: ComponentFactory<any>) =>
        {
            this.cmpRef = this.target.createComponent(factory);
             //to access the created instance use
             this.cmpRef.instance.item = this.data;
        });
    }

    ngOnChanges()
    {
        this.updateComponent();
    }

    ngAfterViewInit()
    {
        this.isViewInitialized = true;
        this.updateComponent();
    }

    ngOnDestroy()
    {
        if (this.cmpRef)
        {
            this.cmpRef.destroy();
        }
    }
}