import {Component, OnInit} from "@angular/core";
import {ConverterregistryService} from "./converterregistry.service";
import {InputcomponentmanagerService} from "./InputcomponentmanagerService";
import {Converter} from "./converter/converter";

@Component({
    moduleId: module.id,
    selector: "den-app",
    templateUrl: "app.component.html",
    styleUrls: ["app.component.css"],
    providers: [ConverterregistryService, InputcomponentmanagerService]
})
export class AppComponent extends OnInit {
    public steps:any[] = [];
    public converters:Converter[] = [];

    constructor(private converterregistryService:ConverterregistryService, private inputcomponentmanagerService:InputcomponentmanagerService) {
        super();
    }

    convert(step:any, $event:any):void {
        step.selectedConverter = this.converterregistryService.getConverter($event.target.selectedOptions[0].id);
        this.update(step);
    }

    update(step:any):void {
        let converter:Converter = step.selectedConverter;

        if (converter !== undefined) {
            let content:string = step.content;
            let result:string;
            try {
                result = converter.convert(content);
            } catch (error) {
                result = null;
            }
            if (result === null) {
                step.message = "Error converting. Not applicable?";
                step.error = true;
            } else {
                step.message = "";
                step.error = false;
                if (result !== "") {
                    let nextComponent:any = this.inputcomponentmanagerService.getNext(step);
                    nextComponent.content = result;
                    this.update(nextComponent);
                }
            }
        }
    }

    ngOnInit():void {
        this.converters = this.converterregistryService.getAllConverters();
        this.steps = this.inputcomponentmanagerService.getAllComponents();
        this.inputcomponentmanagerService.getFirst();
    }
}