/*

   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */
package org.apache.batik.test.svg;

import java.awt.Graphics2D;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.StringWriter;
import java.io.PrintWriter;
import java.net.URL;

import java.util.List;
import java.util.Iterator;

import org.apache.batik.test.DefaultTestReport;
import org.apache.batik.test.TestReport;

import org.apache.batik.swing.JSVGCanvasHandler;

import org.apache.batik.swing.JSVGCanvas;
import org.apache.batik.swing.gvt.Overlay;

import java.awt.image.BufferedImage;

/**
 * One line Class Desc
 *
 * Complete Class Desc
 *
 * @author <a href="mailto:deweese@apache.org">l449433</a>
 * @version $Id$
 */
public class JSVGRenderingAccuracyTest extends SamplesRenderingTest 
       implements JSVGCanvasHandler.Delegate {

    /**
     * Error when canvas can't peform render update SVG file.
     * {0} The file/url that could not be updated..
     */
    public static final String ERROR_SAVE_FAILED = 
        "JSVGRenderingAccuracyTest.message.error.save.failed";

    public static String fmt(String key, Object []args) {
        return Messages.formatMessage(key, args);
    }

    /**
     * For subclasses
     */
    public JSVGRenderingAccuracyTest(){
    }

    protected URL srcURL;
    protected FileOutputStream fos;
    protected TestReport failReport = null;
    protected boolean done;
    protected JSVGCanvasHandler handler = null;

    public JSVGCanvasHandler createCanvasHandler() {
        return new JSVGCanvasHandler(this, this);
    }

    public TestReport encode(URL srcURL, FileOutputStream fos) {
        this.srcURL = srcURL;
        this.fos    = fos;

        handler = createCanvasHandler();
        done = false;
        handler.runCanvas(srcURL.toString());

        handler = null;

        if (failReport != null) return failReport;
        
        DefaultTestReport report = new DefaultTestReport(this);
        report.setPassed(true);
        return report;
    }

    public void scriptDone() {
        synchronized (this) {
            done = true;
            handler.scriptDone();
        }
    }

    /* JSVGCanvasHandler.Delegate Interface */
    public boolean canvasInit(JSVGCanvas canvas) {
        canvas.setURI(srcURL.toString());
        return true;
    }

    public void canvasLoaded(JSVGCanvas canvas) {
    }

    public void canvasRendered(JSVGCanvas canvas) {
    }

    public boolean canvasUpdated(JSVGCanvas canvas) {
        synchronized (this) {
            return done;
        }
    }

    public void canvasDone(JSVGCanvas canvas) {
        synchronized (this) {
            done = true;
            if (failReport != null)
                return;

            try {
                // Get the base image
                BufferedImage theImage = copyImage(canvas.getOffScreen());

                // Capture the overlays
                List overlays = canvas.getOverlays();

                // Paint the overlays
                Graphics2D g = theImage.createGraphics();
                Iterator it = overlays.iterator();
                while (it.hasNext()) {
                    ((Overlay)it.next()).paint(g);
                }

                saveImage(theImage, fos);
            } catch (IOException ioe) {
                StringWriter trace = new StringWriter();
                ioe.printStackTrace(new PrintWriter(trace));
                DefaultTestReport report = new DefaultTestReport(this);
                report.setErrorCode(ERROR_SAVE_FAILED);
                report.setDescription(new TestReport.Entry[] { 
                    new TestReport.Entry
                    (fmt(ENTRY_KEY_ERROR_DESCRIPTION, null),
                     fmt(ERROR_SAVE_FAILED, 
                         new Object[]{ srcURL.toString(),
                                       trace.toString()}))
                });
                report.setPassed(false);
                failReport = report;
            }
        }
    }

    public void failure(TestReport report) {
        synchronized (this) {
            done = true;
            failReport = report;
        }
    }

    public static BufferedImage copyImage(BufferedImage bi) {
        // Copy off the image just rendered.
        BufferedImage ret;
        ret = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());
        bi.copyData(ret.getRaster());
        return ret;
    }
}