/*
 * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
 * Copyright (c) 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:
 * 
 * - Redistribution of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * 
 * - Redistribution 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.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
 * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
 * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
 * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
 * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
 * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
 * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
 * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 * 
 * Sun gratefully acknowledges that this software was originally authored
 * and developed by Kenneth Bradley Russell and Christopher John Kline.
 */

package jogamp.opengl.egl;

import javax.media.nativewindow.*;
import javax.media.nativewindow.egl.EGLGraphicsDevice;
import javax.media.opengl.*;

import com.jogamp.common.JogampRuntimeException;
import com.jogamp.common.util.*;
import jogamp.opengl.*;
import jogamp.nativewindow.WrappedSurface;

import java.util.HashMap;
import java.util.List;

public class EGLDrawableFactory extends GLDrawableFactoryImpl {
  
    private static final GLDynamicLookupHelper eglES1DynamicLookupHelper;
    private static final GLDynamicLookupHelper eglES2DynamicLookupHelper;

    static {
        // Register our GraphicsConfigurationFactory implementations
        // The act of constructing them causes them to be registered
        new EGLGraphicsConfigurationFactory();

        // Check for other underlying stuff ..
        if(NativeWindowFactory.TYPE_X11.equals(NativeWindowFactory.getNativeWindowType(true))) {
            try {
                ReflectionUtil.createInstance("jogamp.opengl.x11.glx.X11GLXGraphicsConfigurationFactory", EGLDrawableFactory.class.getClassLoader());
            } catch (JogampRuntimeException jre) { /* n/a .. */ }
        }

        // FIXME: Probably need to move EGL from a static model 
        // to a dynamic one, where there can be 2 instances 
        // for each ES profile with their own ProcAddressTable.

        GLDynamicLookupHelper tmp=null;
        try {
            tmp = new GLDynamicLookupHelper(new EGLES1DynamicLibraryBundleInfo());
        } catch (GLException gle) {
            if(DEBUG) {
                gle.printStackTrace();
            }
        }
        eglES1DynamicLookupHelper = tmp;
        if(null!=eglES1DynamicLookupHelper && eglES1DynamicLookupHelper.isLibComplete()) {
            EGL.resetProcAddressTable(eglES1DynamicLookupHelper);
        }

        tmp=null;
        try {
            tmp = new GLDynamicLookupHelper(new EGLES2DynamicLibraryBundleInfo());
        } catch (GLException gle) {
            if(DEBUG) {
                gle.printStackTrace();
            }
        }
        eglES2DynamicLookupHelper = tmp;
        if(null!=eglES2DynamicLookupHelper && eglES2DynamicLookupHelper.isLibComplete()) {
            EGL.resetProcAddressTable(eglES2DynamicLookupHelper);
        }
    }

    public EGLDrawableFactory() {
        super();
        defaultDevice = new EGLGraphicsDevice(AbstractGraphicsDevice.DEFAULT_CONNECTION, AbstractGraphicsDevice.DEFAULT_UNIT);
    }

    static class SharedResource {
      private EGLGraphicsDevice device;
      //private EGLDrawable drawable;
      //private EGLContext context;

      SharedResource(EGLGraphicsDevice dev /*, EGLDrawable draw, EGLContext ctx */) {
          device = dev;
          // drawable = draw;
          // context = ctx;
      }
      EGLGraphicsDevice getDevice() { return device; }
    }
    HashMap/*<connection, SharedResource>*/ sharedMap = new HashMap();
    EGLGraphicsDevice defaultDevice;

    public final AbstractGraphicsDevice getDefaultDevice() {
      return defaultDevice;
    }

    public final boolean getIsDeviceCompatible(AbstractGraphicsDevice device) {
      if(device instanceof EGLGraphicsDevice) {
          return true;
      }
      return false;
    }

    private SharedResource getOrCreateShared(AbstractGraphicsDevice device) {
        String connection = device.getConnection();
        SharedResource sr;
        synchronized(sharedMap) {
            sr = (SharedResource) sharedMap.get(connection);
        }
        if(null==sr) {
            long eglDisplay = EGL.eglGetDisplay(EGL.EGL_DEFAULT_DISPLAY);
            if (eglDisplay == EGL.EGL_NO_DISPLAY) {
                throw new GLException("Failed to created EGL default display: error 0x"+Integer.toHexString(EGL.eglGetError()));
            } else if(DEBUG) {
                System.err.println("eglDisplay(EGL_DEFAULT_DISPLAY): 0x"+Long.toHexString(eglDisplay));
            }
            if (!EGL.eglInitialize(eglDisplay, null, null)) {
                throw new GLException("eglInitialize failed"+", error 0x"+Integer.toHexString(EGL.eglGetError()));
            }
            EGLGraphicsDevice sharedDevice = new EGLGraphicsDevice(eglDisplay, connection, device.getUnitID());
            sr = new SharedResource(sharedDevice);
            synchronized(sharedMap) {
                sharedMap.put(connection, sr);
            }
            if (DEBUG) {
              System.err.println("!!! SharedDevice: "+sharedDevice);
            }
        }
        return sr;
    }


    protected final GLContext getOrCreateSharedContextImpl(AbstractGraphicsDevice device) {
        // FIXME: not implemented .. needs a dummy EGL surface - NEEDED ?
        return null;
    }

    protected AbstractGraphicsDevice getOrCreateSharedDeviceImpl(AbstractGraphicsDevice device) {
        SharedResource sr = getOrCreateShared(device);
        if(null!=sr) {
            return sr.getDevice();
        }
        return null;
    }

    SharedResource getOrCreateSharedResource(AbstractGraphicsDevice device) {
        return (SharedResource) getOrCreateShared(device);
    }

    public GLDynamicLookupHelper getGLDynamicLookupHelper(int esProfile) {
        if (2==esProfile) {
            if(null==eglES2DynamicLookupHelper) {
                throw new GLException("GLDynamicLookupHelper for ES2 not available");
            }
            return eglES2DynamicLookupHelper;
        } else if (1==esProfile) {
            if(null==eglES1DynamicLookupHelper) {
                throw new GLException("GLDynamicLookupHelper for ES1 not available");
            }
            return eglES1DynamicLookupHelper;
        } else {
            throw new GLException("Unsupported: ES"+esProfile);
        }
    }

    protected final void shutdownInstance() {}

    protected List/*GLCapabilitiesImmutable*/ getAvailableCapabilitiesImpl(AbstractGraphicsDevice device) {
        return EGLGraphicsConfigurationFactory.getAvailableCapabilities(this, device);
    }

    protected GLDrawableImpl createOnscreenDrawableImpl(NativeSurface target) {
        if (target == null) {
          throw new IllegalArgumentException("Null target");
        }
        return new EGLOnscreenDrawable(this, target);
    }

    protected GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) {
        if (target == null) {
          throw new IllegalArgumentException("Null target");
        }
        AbstractGraphicsConfiguration config = target.getGraphicsConfiguration().getNativeGraphicsConfiguration();
        GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
        if(!caps.isPBuffer()) {
            throw new GLException("Not yet implemented");
        }
        // PBuffer GLDrawable Creation
        return new EGLPbufferDrawable(this, target);
    }

    public boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
        return true;
    }

    protected NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice device, GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, int width, int height) {
        WrappedSurface ns = new WrappedSurface(EGLGraphicsConfigurationFactory.createOffscreenGraphicsConfiguration(device, capsChosen, capsRequested, chooser));
        ns.setSize(width, height);
        return ns;
    }

    protected ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice device, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {    
        WrappedSurface ns = new WrappedSurface(EGLGraphicsConfigurationFactory.createOffscreenGraphicsConfiguration(device, capsRequested, capsRequested, chooser), windowHandle);
        return ns;
    }    
    
    protected GLContext createExternalGLContextImpl() {
        AbstractGraphicsScreen absScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_EGL);
        return new EGLExternalContext(absScreen);
    }

    public boolean canCreateExternalGLDrawable(AbstractGraphicsDevice device) {
        return false;
    }

    protected GLDrawable createExternalGLDrawableImpl() {
        throw new GLException("Not yet implemented");
    }

    public boolean canCreateContextOnJava2DSurface(AbstractGraphicsDevice device) {
        return false;
    }

    public GLContext createContextOnJava2DSurface(Object graphics, GLContext shareWith)
        throws GLException {
        throw new GLException("Unimplemented on this platform");
    }
}