package nl.tudelft.goal.ut2004.visualizer.map;
   
   import java.awt.Point;
   import java.util.HashSet;
   import java.util.Set;
   import java.util.logging.Logger;
   
   import javax.media.opengl.GLCapabilities;
   import javax.media.opengl.GLProfile;
  import javax.media.opengl.awt.GLJPanel;
  
  import nl.tudelft.goal.ut2004.visualizer.timeline.map.EnvironmentRenderer;
  import nl.tudelft.goal.ut2004.visualizer.timeline.map.CollectionRenderer;
  import nl.tudelft.goal.ut2004.visualizer.timeline.map.MapController;
  import nl.tudelft.goal.ut2004.visualizer.timeline.map.MapRenderer;
  import nl.tudelft.goal.ut2004.visualizer.timeline.map.MapViewpoint;
  import cz.cuni.amis.pogamut.unreal.communication.messages.gbinfomessages.IPlayer;
  import cz.cuni.amis.pogamut.unreal.communication.worldview.map.IUnrealMap;
  
  /**
   * This is a GLJPanel that displays UT2004Map. it is a base class, so it takes
   * care of some things, while others are left for derived class to do.
   * <p>
   * What it does: * Can render passed map * Can render all stuff in
   * agentRenderers * Takes care of user interaction for map viewpoint * Selection
   * of object
   * <p>
   * What it doesn't do: * automatically display map, someone else has to take
   * care of that (adding/removing) from agentRenderers * fill in agentRenderers,
   * derived class has to do that.
   * 
   * In lookup are selected objects
   * 
   * @author Honza
   */
  public abstract class MapGLPanel extends GLJPanel implements
  		MapViewpoint.ViewpointListener {
  
  	protected MapViewpoint mapViewpoint;
  	protected MapController mapController;
  
  	protected MapRenderer mapRenderer;
  	protected CollectionRenderer<IPlayer> agentRenderes;
  	protected CollectionRenderer<Object> objectRenderes;
  
  	protected EnvironmentRenderer environmentRenderer;
  
  	// iterator used to assign unique names for gl rendering, this enabling
  	// selection of objects
  	protected int lastGLName = 1;
  
  	private IUnrealMap map;
  
  	/**
  	 * Create a panel for
  	 * 
  	 * @param caps
  	 * @param map
  	 * @param log
  	 */
  	protected MapGLPanel(GLCapabilities caps, IUnrealMap map) {
  		super(caps);
  
  		// if (Beans.isDesignTime()) {
  		// Beans.setDesignTime(false);
  		// }
  
  		this.map = map;
  
  		// Stuff for controlling viewpoint in map
  		mapViewpoint = new MapViewpoint();
  		mapController = new MapController(this, mapViewpoint, map.getBox());
  		mapController.registerListeners();
  
  		// Create renderers
  		mapRenderer = new MapRenderer(map, lastGLName++);
  		agentRenderes = new CollectionRenderer<IPlayer>();
  		objectRenderes = new CollectionRenderer<Object>();
  		environmentRenderer = new EnvironmentRenderer(mapViewpoint,
  				agentRenderes, objectRenderes, mapRenderer);
  
  		// Add listener so this level is rendered
  		this.addGLEventListener(environmentRenderer);
  
  		// Listen for changes in viewpoint
  		mapViewpoint.addViewpointListener(this);
  
  		// Set initial position of view + thanks to listener display
  		mapViewpoint.setFromViewedBox(map.getBox());
  
  	}
  
  	/**
  	 * Create a pane showing passed map
  	 * 
  	 * @param map
  	 *            Map this pane is supposed to show
  	 */
  	protected MapGLPanel(IUnrealMap map, Logger log) {
 		this(getCapabilities(), map);
 	}
 
 	/**
 	 * I require HW acceleration and double buffering.
 	 * 
 	 * @return Set of required capabilities
 	 */
 	private static GLCapabilities getCapabilities() {
 		GLCapabilities caps = new GLCapabilities(GLProfile.getDefault());
 		caps.setHardwareAccelerated(true);
 		caps.setDoubleBuffered(true);
 		return caps;
 	}
 
 	/**
 	 * When viewpoint is changed, render the map (call display()).
 	 * 
 	 * @param viewpoint
 	 */
 	@Override
 	public synchronized void onChangedViewpoint(MapViewpoint viewpoint) {
 		display();
 	}
 
 	/**
 	 * Get agents at point p in the scene.
 	 * 
 	 * @param p
 	 *            in window coordiates system, [0,0] is left top
 	 * @return List of renderable agents that are at the passed point
 	 */
 	public synchronized Set<Object> getObjectsAt(Point p) {
 		environmentRenderer.setSelectPoint(p);
 		display();
 		int[] list = environmentRenderer.getSelectedObjects();
 
 		Set<Object> selection = new HashSet<Object>();
 
 		// find that miserable renderer in agents
 		selection.addAll(agentRenderes.getObjectsByGLName(list));
 		
 		// find that miserable renderer in world objects
 		selection.addAll(objectRenderes.getObjectsByGLName(list));
 
 		return selection;
 	}
 
 	/**
 	 * Remove listeners and basically clean up this map. Any call to this object
 	 * after this method should invoke exception (it doesn't but I can always
 	 * hope in NullPointerException).
 	 */
 	public synchronized void destroy() {
 		this.removeGLEventListener(environmentRenderer);
 		this.mapViewpoint.removeViewpointListener(this);
 
 		mapRenderer.destroy();
 		agentRenderes.destroy();
 		objectRenderes.destroy();
 		
 		mapRenderer = null;
 		environmentRenderer = null;
 		agentRenderes = null;
 		objectRenderes = null;
 
 		mapController = null;
 		mapViewpoint = null;
 	}
 
 	protected IUnrealMap getMap() {
 		return map;
 	}
 }