package com.catamania.convertXWiki;

import java.io.StringReader;
import java.nio.file.Files;
import java.nio.file.Paths;

import org.xwiki.component.embed.EmbeddableComponentManager;
import org.xwiki.rendering.block.XDOM;
import org.xwiki.rendering.parser.Parser;
import org.xwiki.rendering.renderer.BlockRenderer;
import org.xwiki.rendering.renderer.printer.DefaultWikiPrinter;
import org.xwiki.rendering.renderer.printer.WikiPrinter;
import org.xwiki.rendering.syntax.Syntax;
import org.xwiki.rendering.transformation.Transformation;
import org.xwiki.rendering.transformation.TransformationContext;

public class Main {

    public static void main(String[] args) {
        setLoggingLevel(ch.qos.logback.classic.Level.OFF);

        if (args.length > 0) {
            try {
                String nomFichier = args[0];
                String contenu = new String(Files.readAllBytes(Paths.get(nomFichier)));

                contenu = Main.convertMacro(contenu);

                System.out.println(contenu);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    private static String convertMacro(String contenu) throws Exception {
        // Initialize Rendering components and allow getting instances
        final EmbeddableComponentManager cm = new EmbeddableComponentManager();
        cm.initialize(Main.class.getClassLoader());

        Parser parser = cm.getInstance(Parser.class, Syntax.XWIKI_2_1.toIdString());
        XDOM xdom = parser.parse(new StringReader(contenu));

        // Execute the Macro Transformation to execute Macros.
        Transformation transformation = cm.getInstance(Transformation.class, "macro");
        TransformationContext txContext = new TransformationContext(xdom, parser.getSyntax());
        transformation.transform(xdom, txContext);

        // Convert input in XWiki Syntax 2.1 into XHTML. The result is stored in the printer.
        WikiPrinter printer = new DefaultWikiPrinter();
        BlockRenderer renderer = cm.getInstance(BlockRenderer.class, Syntax.XHTML_1_0.toIdString());
        renderer.render(xdom, printer);

        return printer.toString();
    }

    public static void setLoggingLevel(ch.qos.logback.classic.Level level) {
        ch.qos.logback.classic.Logger root = (ch.qos.logback.classic.Logger) org.slf4j.LoggerFactory.getLogger(ch.qos.logback.classic.Logger.ROOT_LOGGER_NAME);
        root.setLevel(level);
    }
}