package info.magnolia.services;


import info.magnolia.context.MgnlContext;
import info.magnolia.objectfactory.Components;
import info.magnolia.rendering.context.RenderingContext;
import info.magnolia.rendering.engine.RenderException;
import info.magnolia.rendering.engine.RenderingEngine;
import info.magnolia.rendering.renderer.Renderer;
import org.apache.commons.lang.StringUtils;
import org.apache.jackrabbit.commons.JcrUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.jcr.Node;
import javax.jcr.RepositoryException;
import java.util.Map;

/**
 * Description here.
 * User: nicolasbarbe
 * Date: 05/03/14
 */
public class ResourceExtensionDispatcherRenderer implements Renderer {

    private static final Logger log = LoggerFactory.getLogger(ResourceExtensionDispatcherRenderer.class);

    @Override
    public void render(RenderingContext ctx, Map<String, Object> contextObjects) throws RenderException {
        Node content = ctx.getCurrentContent();

        String extension = StringUtils.substringAfterLast(MgnlContext.getAggregationState().getCurrentURI(), ".");

        if(null != extension) {

            try {
                Node nodeToBeServed = null;
                if(content.hasNode(extension)) {

                    nodeToBeServed = content.getNode(extension);

                    RenderingEngine engine = Components.getComponent(RenderingEngine.class);
                    engine.render(nodeToBeServed, ctx.getOutputProvider());
                }else {
                    throw new RenderException("Extension " + extension + " not found for the resource " + JcrUtils.toString(content));
                }

            } catch (RepositoryException e) {
                throw new RenderException("Extension " + extension + " not found for the resource " + JcrUtils.toString(content), e);
            }
        } else {
            throw new RenderException("Resource " + JcrUtils.toString(content) + " must be accessed using an extension.");
        }


    }
}