import {Component, ElementRef, Input, OnDestroy, OnInit} from '@angular/core';
import {Subscription} from 'rxjs/Subscription';
import {ErrorMessage} from '../../objects/error-message';
import {HFormService} from '../../services/h-form.service';
import {MessageService} from '../../services/message.service';
import {JsfElement} from '../../superclass/jsf-element';

@Component({
    selector: 'h-message',
    templateUrl: './h-message.component.html',
    styleUrls: ['./h-message.component.css'],
})
export class HMessageComponent extends JsfElement implements OnInit, OnDestroy {
    @Input('for')
    forId: string;

    errorMessage = new ErrorMessage();
    private subscription: Subscription;

    constructor(hFormService: HFormService, private messageService: MessageService,
                elementRef: ElementRef) {
        super(hFormService, elementRef);
    }

    ngOnInit() {
        this.subscription = this.messageService.subscribe(this.forId,
            (value: ErrorMessage) => {
                this.errorMessage = value;
            });
    }

    ngOnDestroy() {
        // in case we did not init at all
        if (this.subscription) {
            this.subscription.unsubscribe();
        }
    }

}