package de.intersales.qbus2;

import static org.asciidoctor.Asciidoctor.Factory.create;

import io.vertx.core.Vertx;
import io.vertx.ext.web.Router;
import org.asciidoctor.Asciidoctor;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.util.HashMap;

import org.slf4j.Logger;

public class DocumentRendererUtil {


    private Asciidoctor asciidoctor;
    Logger logger = LoggerFactory.getLogger(DocumentRendererUtil.class);


    public DocumentRendererUtil(Vertx vertx){
        vertx.executeBlocking(future ->{
            asciidoctor = create();
            future.complete(asciidoctor);
        }, res-> {
            logger.info("AsciidoctorJ created");
        });
    }
    public void extend(Router router){

        router.get("/readme.html").handler( ctx -> {
            String html = asciidoctor.convert(
                    getDocFileContent(),
                    new HashMap<String, Object>());
            ctx.response().end(html);
        });

    }

    private String getDocFileContent() {
        try {
            InputStream is = getClass().getResourceAsStream("/doc/readme.adoc");
            java.util.Scanner s = new java.util.Scanner(is).useDelimiter("\\A");
            return s.hasNext() ? s.next() : "";
        }
        catch (Exception e){
            logger.error("Could not load readme file", e);
            logger.error("Working Directory = " +
                    System.getProperty("user.dir"));
            return "";
        }
    }

}