package org.simantics.plant3d.editor;

import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.eclipse.jface.action.IMenuListener;
import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.ui.views.contentoutline.IContentOutlinePage;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.Session;
import org.simantics.db.common.request.ReadRequest;
import org.simantics.db.exception.DatabaseException;
import org.simantics.g3d.scenegraph.IG3DNode;
import org.simantics.g3d.scenegraph.NodeMap;
import org.simantics.g3d.scenegraph.base.INode;
import org.simantics.g3d.vtk.action.RemoveAction;
import org.simantics.g3d.vtk.common.HoverHighlighter;
import org.simantics.g3d.vtk.common.NodeSelectionProvider2;
import org.simantics.g3d.vtk.common.SelectionHighlighter;
import org.simantics.g3d.vtk.common.VtkView;
import org.simantics.g3d.vtk.shape.vtkShape;
import org.simantics.g3d.vtk.swt.ContextMenuListener;
import org.simantics.g3d.vtk.swt.InteractiveVtkComposite;
import org.simantics.g3d.vtk.swt.RotateAction;
import org.simantics.g3d.vtk.swt.TranslateAction;
import org.simantics.g3d.vtk.swt.vtkCameraAndSelectorAction;
import org.simantics.g3d.vtk.utils.AxesDisplay;
import org.simantics.objmap.graph.IMapping;
import org.simantics.objmap.graph.Mappings;
import org.simantics.objmap.graph.schema.IMappingSchema;
import org.simantics.plant3d.actions.AddComponentAction;
import org.simantics.plant3d.actions.AddEquipmentAction;
import org.simantics.plant3d.actions.AddNozzleAction;
import org.simantics.plant3d.actions.RemoveAndSplitAction;
import org.simantics.plant3d.actions.RoutePipeAction;
import org.simantics.plant3d.actions.TranslateInlineAction;
import org.simantics.plant3d.scenegraph.EndComponent;
import org.simantics.plant3d.scenegraph.Equipment;
import org.simantics.plant3d.scenegraph.IP3DNode;
import org.simantics.plant3d.scenegraph.InlineComponent;
import org.simantics.plant3d.scenegraph.Nozzle;
import org.simantics.plant3d.scenegraph.P3DRootNode;
import org.simantics.plant3d.scenegraph.PipelineComponent;
import org.simantics.plant3d.scenegraph.SchemaBuilder;
import org.simantics.plant3d.scenegraph.TurnComponent;
import org.simantics.plant3d.scenegraph.controlpoint.ControlPointFactory;
import org.simantics.plant3d.scenegraph.controlpoint.PipingRules;
import org.simantics.plant3d.utils.ComponentUtils;
import org.simantics.plant3d.utils.Item;
import org.simantics.plant3d.utils.P3DUtil;
import org.simantics.selectionview.StandardPropertyPage;
import org.simantics.ui.workbench.IPropertyPage;
import org.simantics.ui.workbench.IResourceEditorInput;
import org.simantics.ui.workbench.ResourceEditorPart;
import org.simantics.utils.threads.ThreadUtils;
import org.simantics.utils.ui.ExceptionUtils;

import vtk.vtkActor;
import vtk.vtkCameraPass;
import vtk.vtkDefaultPass;
import vtk.vtkLightsPass;
import vtk.vtkRenderPassCollection;
import vtk.vtkRenderer;
import vtk.vtkSequencePass;


public class Plant3DEditor extends ResourceEditorPart {

	private Composite parent;
	private Resource input;
//	private InteractiveVtkPanel panel;
//	private SWTAWTComponent component;
	private InteractiveVtkComposite panel;
	
	private P3DRootNode rootNode;
	private IMapping<Resource,Object> mapping;
	
	private NodeSelectionProvider2<Resource,Object> selectionProvider;
	
	private vtkCameraAndSelectorAction cameraAction;
	private TranslateAction translateAction;
	private TranslateInlineAction translateInlineAction;
	private RotateAction rotateAction;
	private RemoveAction removeAction;
	private RemoveAndSplitAction removeSplitAction;
	private RoutePipeAction routePipeAction;
	private AddComponentAction addComponentAction;
	
	private P3DNodeMap nodeMap;
	
	@Override
	public void createPartControl(Composite parent) {
		this.parent = parent;
		parent.setLayout (new FillLayout ());
//		component = new SWTAWTComponent(parent,SWT.NONE) {
//			
//			@Override
//			protected Component createSwingComponent() {
//				if (panel == null) {
//					panel = new InteractiveVtkPanel();
//					vtkPanelUtil.registerPanel(panel);
//					createScene();
//				}
//				return panel;
//			}
//		};

		IResourceEditorInput rei = (IResourceEditorInput)getEditorInput();
		input = rei.getResource();
		
		panel = new InteractiveVtkComposite(parent);
		
		
		//IActionBars actionBars = getEditorSite().getActionBars();

		hookContextMenu();
		
		createScene();

		//component.syncPopulate();
		
		new ContextMenuListener(panel, contextMenu);
		
		cameraAction = new vtkCameraAndSelectorAction(panel);	
		panel.setDefaultAction(cameraAction);
		panel.useDefaultAction();
		panel.setPickType(4);
		
		try {
			ControlPointFactory.preloadCache();
			ComponentUtils.preloadCache();
		} catch (Exception e) {
			ExceptionUtils.logAndShowError("Cannot open Plant3D editor",e);
			return;
		}
		
		try {
			getSession().syncRequest(new ReadRequest() {
				
				@SuppressWarnings({ "rawtypes", "unchecked" })
				@Override
				public void run(ReadGraph graph) throws DatabaseException {
					PipingRules.setEnabled(false);
					IMappingSchema<Resource, Object> schema = getSchema(graph);
					mapping = Mappings.createWithListening(schema);
					rootNode = (P3DRootNode)mapping.map(graph, input);
					// update control points.
					// TODO : this should be optimized.
					try {
						P3DUtil.finalizeDBLoad(rootNode);
						
					} catch (Exception e) {
						throw new DatabaseException(e);
					}
					nodeMap = createNodeMap(getSession(), mapping, panel,rootNode);
				}
			});
			
			if (rootNode == null)
				throw new RuntimeException("Scenegraph loading failed.");
			populate();
			
			selectionProvider = new NodeSelectionProvider2<Resource,Object>(this,mapping,nodeMap);

			cameraAction.addSelectionChangedListener(selectionProvider);

			cameraAction.addHoverChangedListener(new HoverHighlighter(panel,nodeMap));
			selectionProvider.addSelectionChangedListener(new SelectionHighlighter(panel,nodeMap));
			
			getSite().setSelectionProvider(selectionProvider);
			getSite().getPage().addPostSelectionListener(selectionProvider);
			
			//outlinePage = new ScenegraphOutlinePage(rootNode);
			
			
			parent.addDisposeListener(new DisposeListener() {
				
				@Override
				public void widgetDisposed(DisposeEvent e) {
					getSite().getPage().removePostSelectionListener(selectionProvider);
					
					PipingRules.setEnabled(false);
					nodeMap.delete();
					PipingRules.setEnabled(true);
					mapping.dispose();
//					component.dispose();
					//panel.getComponent().dispose();
					
				}
			});
		} catch (DatabaseException e1) {
			ExceptionUtils.logAndShowError("Cannot open Plant3D editor",e1);
			return;
		}
		
		createActions();
		
	}
	
	protected void createActions() {
		translateAction = new TranslateAction(panel,nodeMap);
		translateInlineAction = new TranslateInlineAction(panel, nodeMap);
		rotateAction = new RotateAction(panel,nodeMap);
		removeAction = new RemoveAction(nodeMap) {
			public void setNode(IG3DNode node) {
				super.setNode(node);
			}
		};
		
		removeSplitAction = new RemoveAndSplitAction(nodeMap);
		routePipeAction = new RoutePipeAction(panel,rootNode);
		addComponentAction = new AddComponentAction(panel, rootNode);
	}
	
	public void populate() {
		ThreadUtils.asyncExec(panel.getThreadQueue(), new Runnable() {
			
			@Override
			public void run() {
				nodeMap.populate();
			}
		});
		
	}
	
	protected IMappingSchema<Resource, Object> getSchema(ReadGraph graph) throws DatabaseException {
		IMappingSchema<Resource,Object> schema = SchemaBuilder.getSchema(graph);
		return schema;
	}
	
	protected P3DNodeMap createNodeMap(Session session, IMapping<Resource, Object> mapping, VtkView panel, P3DRootNode rootNode) {
		return new P3DNodeMap(session, mapping, panel,rootNode);
	}
	
	@Override
	public void setFocus() {
		//component.setFocus();
		panel.getComponent().setFocus();
	}
	
	private void createScene() {
		vtkRenderer ren1 = panel.getRenderer();
		
		boolean multiPass = false;
		if (multiPass) {
			
			vtkLightsPass lightsPass = new vtkLightsPass();
			vtkDefaultPass defaultPass = new vtkDefaultPass();
			
			
			vtkRenderPassCollection passes = new vtkRenderPassCollection();
			passes.AddItem(lightsPass);
			passes.AddItem(defaultPass);
			
			vtkSequencePass seq = new vtkSequencePass();
			seq.SetPasses(passes);
			
			vtkCameraPass cameraPass = new vtkCameraPass();
			cameraPass.SetDelegatePass(seq);
			
			ren1.SetPass(cameraPass);
			
		}
//		ren1.GetRenderWindow().LineSmoothingOn();
//		ren1.GetRenderWindow().PointSmoothingOn();
//		ren1.GetRenderWindow().PolygonSmoothingOn();
//		ren1.GetRenderWindow().SetMultiSamples(2);

		

		ren1.SetBackground2(1,1,1); // background color white
		ren1.SetBackground(0.9,0.9,0.9);
		ren1.SetGradientBackground(true);

		// vtkActor grid = vtkShape.createGridActor(8,1.0,1|2|4);
		vtkActor grid = vtkShape.createGridActor(8,1.0, 2 );
		grid.SetPickable(0);
		ren1.AddActor(grid);
		panel.addDeletable(grid);
		
		AxesDisplay axesDisplay = new AxesDisplay(panel);
		axesDisplay.show();
		
	}
	
	protected Menu contextMenu;
	
	protected void hookContextMenu() {
		MenuManager menuMgr = new MenuManager("#PopupMenu");
		menuMgr.setRemoveAllWhenShown(true);
		menuMgr.addMenuListener(new IMenuListener() {
			public void menuAboutToShow(IMenuManager manager) {            	
				createContextMenu(manager);
			}
		});

		contextMenu = menuMgr.createContextMenu(parent);
	}
	
	protected void createContextMenu(IMenuManager m) {
		List<IG3DNode> selected = selectionProvider.getSelectedNodes();
		try {
			if (selected.size() == 0) {
				for (Item eq : P3DUtil.getEquipments()) {
					m.add(new AddEquipmentAction(rootNode, eq));
				}
			} else if (selected.size() == 1) {
				IP3DNode node = (IP3DNode)selected.get(0);
				if (node instanceof Equipment) {
					m.add(translateAction);
					m.add(rotateAction);
					for (Item eq : P3DUtil.getNozzles()) {
						AddNozzleAction add = new AddNozzleAction(rootNode, eq);
						add.setEquipment((Equipment)node);
						m.add(add);
					}
					m.add(removeAction);
				} else if (node instanceof Nozzle) {
					Nozzle nozzle = (Nozzle)node;
					if (!nozzle.isFixed()) {
						m.add(translateAction);
						m.add(rotateAction);
					}
					m.add(routePipeAction);
					routePipeAction.setComponent(nozzle);
					routePipeAction.setEnabled(nozzle.getNext() == null && nozzle.getPrevious() == null);
					m.add(addComponentAction);
					addComponentAction.setComponent(nozzle);
					m.add(removeAction);
				} else if (node instanceof TurnComponent) {
					m.add(translateAction);
					TurnComponent component = (TurnComponent)node;
					m.add(routePipeAction);
					routePipeAction.setComponent(component);
					routePipeAction.setEnabled(component.getNext() == null || component.getPrevious() == null);
					m.add(addComponentAction);
					addComponentAction.setComponent(component);
					m.add(removeAction);
					m.add(removeSplitAction);
					removeSplitAction.setNode(node);
				} else if (node instanceof EndComponent) {
					m.add(translateAction);
					m.add(addComponentAction);
					addComponentAction.setComponent((PipelineComponent)node);
					m.add(removeAction);
				} else if (node instanceof InlineComponent) {
					//m.add(translateInlineAction);
					InlineComponent component = (InlineComponent)node;
					m.add(translateInlineAction);
					m.add(routePipeAction);
					routePipeAction.setComponent(component);
					m.add(addComponentAction);
					addComponentAction.setComponent(component);
					m.add(removeAction);
					m.add(removeSplitAction);
					removeSplitAction.setNode(node);
				} else {
				    m.add(removeAction);
				}
				
				
				translateAction.setNode(node);
				translateInlineAction.setNode(node);
				rotateAction.setNode(node);
				removeAction.setNode(node);
				
			} 
		} catch (DatabaseException e) {
			ExceptionUtils.logAndShowError(e);
		}
	}
	
	private IContentOutlinePage createOutline() {
		if (rootNode == null || selectionProvider == null)
			return null;
		//IContentOutlinePage outlinePage = new VTKContentOutlinePage<Resource,Object>(rootNode, selectionProvider);
		IContentOutlinePage outlinePage = new P3DContentOutlinePage(rootNode, selectionProvider) {
			protected void createContextMenu(IMenuManager manager) {
				Plant3DEditor.this.createContextMenu(manager);
			};
		};
		outlinePage.addSelectionChangedListener(new ISelectionChangedListener() {
			
			@Override
			public void selectionChanged(SelectionChangedEvent event) {
				selectionProvider.selectionChanged(event);
			}
		});
		return outlinePage;
	}

	@SuppressWarnings("rawtypes")
	@Override
	public Object getAdapter(Class adapter) {
		if (IPropertyPage.class.equals(adapter))
			return new StandardPropertyPage(getSite(),getPropertyContexts());
		if (IContentOutlinePage.class.equals(adapter)) {
			return createOutline();
		}
		if (NodeMap.class.equals(adapter)) {
			return nodeMap;
		}
		if (INode.class.equals(adapter)) {
			return rootNode;
		}
		if (IMapping.class.equals(adapter)) {
			return mapping;
		}
//		if (InteractiveVtkPanel.class.equals(adapter)) {
//			return panel;
//		}
		if (VtkView.class.equals(adapter))
			return panel;
		if (ISelectionProvider.class.equals(adapter))
			return selectionProvider;
		return super.getAdapter(adapter);
	}
	
	public Set<String> getPropertyContexts() {
		Set<String> result = new HashSet<String>();
		result.add("http://www.simantics.org/Project-1.0/ProjectBrowseContext");
		return result;
	}
	
	public P3DRootNode getRootNode() {
		return rootNode;
	}
	
	public IMapping<Resource, Object> getMapping() {
		return mapping;
	}
}