package com.c2kernel.graph.view;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Insets;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.ClipboardOwner;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.util.Vector;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JToggleButton;

import com.c2kernel.graph.controller.DeletionController;
import com.c2kernel.graph.controller.StartVertexController;
import com.c2kernel.graph.model.GraphModelManager;
import com.c2kernel.graph.model.TypeNameAndConstructionInfo;
import com.c2kernel.utils.Language;
import com.c2kernel.utils.Logger;
import com.c2kernel.utils.Resource;
/**
 * Tool bar with mode toggle buttons, start and delete buttons, and the possibility to add other arbitrary buttons at constructions time.
 */
public class EditorToolBar extends Box implements Printable
{
	protected boolean mEdgeCreationMode = false; // True if edges can be created
	protected GraphPanel mGraphPanel = null;
	// There is on mode button listener per mode button.
	// When a mode button fires anaction performed event
	// its corresponding listener notifies all of the
	// editor mode listeners.
	protected class ModeButtonListener implements ActionListener
	{
		protected String mModeId = null;
		public ModeButtonListener(String modeId)
		{
			mModeId = modeId;
		}
		public void actionPerformed(ActionEvent ae)
		{
			notifyListeners(mModeId);
		}
	}
	// Vertex types and ids
	protected JComboBox mVertexTypeBox = new JComboBox();
	// Edge types and ids
	protected JComboBox mEdgeTypeBox = new JComboBox();
	// Mode buttons
	protected ButtonGroup mModeButtonGroup = new ButtonGroup();
	protected JToggleButton mVertexModeButton = new JToggleButton(Resource.getImageResource("graph/newvertex.png"));
	protected JToggleButton mSelectModeButton = new JToggleButton(Resource.getImageResource("graph/selection.gif"));
	protected JToggleButton mEdgeModeButton = new JToggleButton(Resource.getImageResource("graph/edge.png"));
	// Normal buttons
	protected JButton[] mOtherButtons = null;
	protected JButton mStartButton = new JButton(Resource.getImageResource("graph/start.png"));
	protected JButton mDeleteButton = new JButton(Resource.getImageResource("graph/delete.png"));
	protected JButton mPrintButton = new JButton(Resource.getImageResource("graph/print.png"));
	protected JButton mCopyButton = new JButton(Resource.getImageResource("graph/copy.png"));
	// Controllers
	protected StartVertexController mStartVertexController = new StartVertexController();
	protected DeletionController mDeletionController = new DeletionController();
	// Editor mode listeners
	protected Vector mListenerVector = new Vector(10, 10);
	public EditorToolBar(boolean edgeCreationMode, // True if edges can be created
	JButton[] otherButtons, GraphPanel graphP)
	{
		super(BoxLayout.X_AXIS);
		mGraphPanel = graphP;
		mEdgeCreationMode = edgeCreationMode;
		mOtherButtons = otherButtons;
		prepareModeButtons();
		mStartVertexController.setStartButton(mStartButton);
		mDeletionController.setDeleteButton(mDeleteButton);
		createLayout();
		createListeners();
	}
	protected void prepareModeButtons()
	{
		// Set the tool tip texts
		mVertexModeButton.setToolTipText(Language.translate("Create vertex"));
		mSelectModeButton.setToolTipText(Language.translate("Multi-select and drag"));
		mEdgeModeButton.setToolTipText(Language.translate("Create edge"));
		mStartButton.setToolTipText(Language.translate("Select the start vertex of the graph"));
		mDeleteButton.setToolTipText(Language.translate("Delete the selection"));
        mPrintButton.setToolTipText(Language.translate("Print this graph"));
        mPrintButton.setToolTipText(Language.translate("Copy an image of this graph to the clipboard"));
		// Set the button margins to 0
		mVertexModeButton.setMargin(new Insets(0, 0, 0, 0));
		mSelectModeButton.setMargin(new Insets(0, 0, 0, 0));
		mEdgeModeButton.setMargin(new Insets(0, 0, 0, 0));
		// The initial mode is select mode
		mSelectModeButton.setSelected(true);
		// Add the mode buttons to the mode button group
		mModeButtonGroup.add(mVertexModeButton);
		mModeButtonGroup.add(mSelectModeButton);
		mModeButtonGroup.add(mEdgeModeButton);
		// Add the action listeners
		mVertexModeButton.addActionListener(new ModeButtonListener("Vertex"));
		mSelectModeButton.addActionListener(new ModeButtonListener("Select"));
		mEdgeModeButton.addActionListener(new ModeButtonListener("Edge"));
	}
	public void enterSelectMode()
	{
		mSelectModeButton.setSelected(true);
		notifyListeners("Select");
	}
	public void updateVertexTypes(TypeNameAndConstructionInfo[] typeNameAndConstructionInfo)
	{
		int i = 0;
		mVertexTypeBox.removeAllItems();
		for (i = 0; i < typeNameAndConstructionInfo.length; i++)
		{
			mVertexTypeBox.addItem(typeNameAndConstructionInfo[i]);
		}
	}
	public void updateEdgeTypes(TypeNameAndConstructionInfo[] typeNameAndConstructionInfo)
	{
		int i = 0;
		mEdgeTypeBox.removeAllItems();
		for (i = 0; i < typeNameAndConstructionInfo.length; i++)
		{
			mEdgeTypeBox.addItem(typeNameAndConstructionInfo[i]);
		}
	}
	public TypeNameAndConstructionInfo getSelectedVertexType()
	{
		return (TypeNameAndConstructionInfo) mVertexTypeBox.getSelectedItem();
	}
	public TypeNameAndConstructionInfo getSelectedEdgeType()
	{
		return (TypeNameAndConstructionInfo) mEdgeTypeBox.getSelectedItem();
	}
	protected void createLayout()
	{
		int i = 0;
		add(mSelectModeButton);
		add(mVertexModeButton);
		add(mVertexTypeBox);
		add(Box.createHorizontalStrut(10));
		if (mEdgeCreationMode)
		{
			add(mEdgeModeButton);
			add(mEdgeTypeBox);
		}
		add(Box.createGlue());
		mPrintButton.setEnabled(true);
		mPrintButton.setMargin(new Insets(0, 0, 0, 0));
		add(mPrintButton);
		mCopyButton.setEnabled(true);
		mCopyButton.setMargin(new Insets(0, 0, 0, 0));
		add(mCopyButton);
		mStartButton.setEnabled(false);
		mStartButton.setMargin(new Insets(0, 0, 0, 0));
		mDeleteButton.setEnabled(false);
		mDeleteButton.setMargin(new Insets(0, 0, 0, 0));
		add(mDeleteButton);
		add(Box.createRigidArea(new Dimension(20, 0)));
		add(mStartButton);
		if (mOtherButtons != null)
		{
			for (i = 0; i < mOtherButtons.length; i++)
			{
				mOtherButtons[i].setMargin(new Insets(0, 0, 0, 0));
				add(mOtherButtons[i]);
			}
		}
	}
	protected void createListeners()
	{
		// The vertex mode button should be selected if the
		// user select a vertex type from the vertex type box
		mVertexTypeBox.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent ae)
			{
				mVertexModeButton.setSelected(true);
				notifyListeners("Vertex");
			}
		});
		// The edge mode button should be selected if the
		// user select an edge type from the edge type box
		mEdgeTypeBox.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent ae)
			{
				mEdgeModeButton.setSelected(true);
				notifyListeners("Edge");
			}
		});
		mPrintButton.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent ae)
			{
				PrinterJob _monJob = PrinterJob.getPrinterJob();
				if (_monJob.printDialog())
					_monJob.setPrintable(self());
				try
				{
					_monJob.print();
				}
				catch (Exception ex)
				{
				}
			}
		});

        try {
            Class.forName("java.awt.datatransfer.DataFlavor").getDeclaredField("imageFlavor");
    		mCopyButton.addActionListener(new ActionListener()
    		{
    			public void actionPerformed(ActionEvent ae)
    			{
    				try
    				{      
                        Image i = createImage(mGraphPanel.getWidth(),mGraphPanel.getHeight());
                        Graphics g = i.getGraphics();
                        mGraphPanel.paintComponent(g);
                        ImageTransferable it = new ImageTransferable(i, mGraphPanel.getWidth(), mGraphPanel.getHeight());
                        Toolkit.getDefaultToolkit().getSystemClipboard().setContents(it, it);
    				}
    				catch (Exception e)
    				{
    					Logger.error(e);
    				}
    			}
    		});
        } catch (Exception ex) { //image clipboard transfer not supported
            mCopyButton.setEnabled(false);
        }
	}
    
    protected class ImageTransferable implements Transferable, ClipboardOwner {
        Image image;
        int width,height;
        DataFlavor javaImg;
        public ImageTransferable(Image image, int width, int height) {
            this.image = image;
            this.width = width;
            this.height = height;
            try {
                javaImg = new DataFlavor("image/x-java-image; class=java.awt.Image", "AWT Image");
            } catch (Exception ex){ }
        }
        public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException {
            if (!isDataFlavorSupported(flavor) || image == null) {
                throw new UnsupportedFlavorException(flavor);
            }
            return image;
        }

        public boolean isDataFlavorSupported(DataFlavor flavor) {
            boolean result = in(flavor, getTransferDataFlavors());
            return result;
        }
        
        public DataFlavor[] getTransferDataFlavors() {
            return new DataFlavor[] { javaImg };
        }
        protected boolean in(DataFlavor flavor, DataFlavor[] flavors) {
            int f = 0;
            while ((f < flavors.length) && !flavor.equals(flavors[f])) {
                f++;
            }
            return f < flavors.length;
        }
        public void lostOwnership(Clipboard clipboard, Transferable contents) {
            image = null;
        }
    }
    
	protected void notifyListeners(String newModeId)
	{
		int i = 0;
		EditorModeListener listener = null;
		for (i = 0; i < mListenerVector.size(); i++)
		{
			listener = (EditorModeListener) mListenerVector.elementAt(i);
			listener.editorModeChanged(newModeId);
		}
	}
	public void setGraphModelManager(GraphModelManager graphModelManager)
	{
		mStartVertexController.setGraphModelManager(graphModelManager);
		mDeletionController.setGraphModelManager(graphModelManager);
	}
	public void setGraphPanel(GraphPanel graphPanel)
	{
		graphPanel.addKeyListener(mDeletionController);
	}
	public void addEditorModeListener(EditorModeListener listener)
	{
		mListenerVector.add(listener);
	}
	public void removeEditorModeListener(EditorModeListener listener)
	{
		mListenerVector.remove(listener);
	}
	public void setGraphEditable(boolean editable)
	{
		mVertexModeButton.setEnabled(editable);
		mEdgeModeButton.setEnabled(editable);
	}
	public EditorToolBar self()
	{
		return this;
	}
	public int print(Graphics g, PageFormat pf, int i) throws PrinterException
	{
		if (i >= 1)
		{
			return Printable.NO_SUCH_PAGE;
		}
		Graphics2D g2d = (Graphics2D) g;
		double scalex = pf.getImageableWidth() / mGraphPanel.getWidth();
		double scaley = pf.getImageableHeight() / mGraphPanel.getHeight();
		double scale = Math.min(Math.min(scalex, scaley), 1);
		g2d.translate(pf.getImageableX(), pf.getImageableY());
		g2d.scale(scale, scale);
		mGraphPanel.printComponent(g2d);
		return Printable.PAGE_EXISTS;
	}
}