/**
 * Copyright 2010 JogAmp Community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of JogAmp Community.
 */

package com.jogamp.opengl.test.junit.jogl.swt;

import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLCapabilitiesImmutable;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.GLProfile;

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

import org.junit.Assert;
import org.junit.Assume;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.After;
import org.junit.Test;
import org.junit.FixMethodOrder;
import org.junit.runners.MethodSorters;

import com.jogamp.nativewindow.swt.SWTAccessor;
import com.jogamp.opengl.swt.GLCanvas;
import com.jogamp.opengl.test.junit.jogl.demos.es2.GearsES2;
import com.jogamp.opengl.test.junit.jogl.demos.es2.MultisampleDemoES2;
import com.jogamp.opengl.test.junit.util.UITestCase;
import com.jogamp.opengl.util.Animator;
import com.jogamp.opengl.util.GLReadBufferUtil;
import com.jogamp.opengl.util.texture.TextureIO;

/**
 * Tests that a basic SWT app can open without crashing under different GL profiles.
 * <p>
 * Uses JOGL's new SWT GLCanvas,
 * which allows utilizing custom GLCapability settings,
 * independent from the already instantiated SWT visual.
 * </p>
 * <p>
 * Note that {@link SWTAccessor#invoke(boolean, Runnable)} is still used to comply w/
 * SWT running on Mac OSX, i.e. to enforce UI action on the main thread.
 * </p>
 * @author Wade Walker, et al.
 */
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class TestSWTJOGLGLCanvas01GLn extends UITestCase {

    static int duration = 250;
    static boolean doAnimation = true;

    static final int iwidth = 640;
    static final int iheight = 480;

    Display display = null;
    Shell shell = null;
    Composite composite = null;

    @BeforeClass
    public static void startup() {
        System.out.println( "GLProfile " + GLProfile.glAvailabilityToString() );
    }

    @Before
    public void init() {
        SWTAccessor.invoke(true, new Runnable() {
            public void run() {
                display = new Display();
                Assert.assertNotNull( display );
            }});
        display.syncExec(new Runnable() {
            public void run() {
                shell = new Shell( display );
                Assert.assertNotNull( shell );
                shell.setLayout( new FillLayout() );
                composite = new Composite( shell, SWT.NO_BACKGROUND );
                composite.setLayout( new FillLayout() );
                Assert.assertNotNull( composite );
            }});
    }

    @After
    public void release() {
        Assert.assertNotNull( display );
        Assert.assertNotNull( shell );
        Assert.assertNotNull( composite );
        try {
            display.syncExec(new Runnable() {
               public void run() {
                composite.dispose();
                shell.dispose();
               }});
            SWTAccessor.invoke(true, new Runnable() {
               public void run() {
                display.dispose();
               }});
        }
        catch( final Throwable throwable ) {
            throwable.printStackTrace();
            Assume.assumeNoException( throwable );
        }
        display = null;
        shell = null;
        composite = null;
    }

    protected void runTestAGL( final GLCapabilitiesImmutable caps, final GLEventListener demo ) throws InterruptedException {
        final GLReadBufferUtil screenshot = new GLReadBufferUtil(false, false);

        final GLCanvas canvas = GLCanvas.create( composite, 0, caps, null);
        Assert.assertNotNull( canvas );

        canvas.addGLEventListener( demo );
        canvas.addGLEventListener(new GLEventListener() {
           int displayCount = 0;
           public void init(final GLAutoDrawable drawable) { }
           public void reshape(final GLAutoDrawable drawable, final int x, final int y, final int width, final int height) { }
           public void display(final GLAutoDrawable drawable) {
              if(displayCount < 3) {
                  snapshot(displayCount++, null, drawable.getGL(), screenshot, TextureIO.PNG, null);
              }
           }
           public void dispose(final GLAutoDrawable drawable) { }
        });

        display.syncExec(new Runnable() {
           public void run() {
            shell.setText( getSimpleTestName(".") );
            shell.setSize( 640, 480 );
            shell.open();
           } } );

        final Animator anim = new Animator();
        if(doAnimation) {
            anim.add(canvas);
            anim.start();
        }

        final long lStartTime = System.currentTimeMillis();
        final long lEndTime = lStartTime + duration;
        try {
            while( (System.currentTimeMillis() < lEndTime) && !canvas.isDisposed() ) {
                if( !display.readAndDispatch() ) {
                    // blocks on linux .. display.sleep();
                    Thread.sleep(10);
                }
            }
        } catch( final Throwable throwable ) {
            throwable.printStackTrace();
            Assume.assumeNoException( throwable );
        }

        anim.stop();

        display.syncExec(new Runnable() {
           public void run() {
               canvas.dispose();
           } } );
    }

    @Test
    public void test() throws InterruptedException {
        runTestAGL( new GLCapabilities(GLProfile.getGL2ES2()), new GearsES2() );
    }

    @Test
    public void test_MultisampleAndAlpha() throws InterruptedException {
        final GLCapabilities caps = new GLCapabilities(GLProfile.getGL2ES2());
        caps.setSampleBuffers(true);
        caps.setNumSamples(2);
        runTestAGL( caps, new MultisampleDemoES2(true) );
    }

    static int atoi(final String a) {
        int i=0;
        try {
            i = Integer.parseInt(a);
        } catch (final Exception ex) { ex.printStackTrace(); }
        return i;
    }

    public static void main(final String args[]) {
        for(int i=0; i<args.length; i++) {
            if(args[i].equals("-time")) {
                duration = atoi(args[++i]);
            } else if(args[i].equals("-still")) {
                doAnimation = false;
            }
        }
        System.out.println("durationPerTest: "+duration);
        org.junit.runner.JUnitCore.main(TestSWTJOGLGLCanvas01GLn.class.getName());
    }
}
