/*

 * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

import java.awt.dnd.*;

import java.awt.*;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.UnsupportedFlavorException;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Iterator;

import java.util.Arrays;

public class TargetPanel extends Panel implements DropTargetListener{

    private java.util.List <File> content = new ArrayList<File>();

    //private final CustomDropTargetListener dropTargetListener = new CustomDropTargetListener();

    private Frame frame;

    public TargetPanel (Frame frame)

    {

        this.frame = frame;

        setBackground(Color.DARK_GRAY);

        setPreferredSize(new Dimension(200, 200));

        setDropTarget(new DropTarget(this, this));

    }

    public void dragEnter(DropTargetDragEvent dtde) {

        if (dtde.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {

            dtde.acceptDrag(DnDConstants.ACTION_COPY_OR_MOVE);

        }

    }

    public void dragOver(DropTargetDragEvent dtde) {

        if (dtde.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {

            dtde.acceptDrag(DnDConstants.ACTION_COPY_OR_MOVE);

        }

    }

    public void dropActionChanged(DropTargetDragEvent dtde) {

        if (dtde.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {

            dtde.acceptDrag(DnDConstants.ACTION_COPY_OR_MOVE);

        }

    }

    public void dragExit(DropTargetEvent dte) {

    }

    public void drop(DropTargetDropEvent dtde) {

        dtde.acceptDrop(DnDConstants.ACTION_COPY_OR_MOVE);

        if (dtde.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {

            try {

                content = (java.util.List)dtde.getTransferable().getTransferData(DataFlavor.javaFileListFlavor);

                repaint();

            } catch (UnsupportedFlavorException e) {

                e.printStackTrace();

            } catch (IOException e) {

                e.printStackTrace();

            }

            dtde.dropComplete(true);

            boolean listsAreEqual = true;

             for (int i = 0; i < content.size(); i++) {

                if(!FileListTransferable.files[i].getName().equals(content.get(i).getName())) {

                    listsAreEqual = false;

                }

            }

            if (listsAreEqual) {

                System.err.println(InterprocessMessages.EXECUTION_IS_SUCCESSFULL);

                System.exit(0);

            }

        }

        dtde.rejectDrop();

        System.err.println(InterprocessMessages.FILES_ON_TARGET_ARE_CORRUPTED);

        System.exit(1);

    }

    public void paint(Graphics g) {

        g.setColor(Color.YELLOW);

        int i = 0;

        for (Iterator <File> iterator = content.iterator(); iterator.hasNext();i++) {

            g.drawString(iterator.next().getName(), 5, g.getFontMetrics().getAscent()*i+20);

        }

    }

}