/*

 * Copyright (c) 2013, 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.*;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.UnsupportedFlavorException;

import java.awt.dnd.*;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.io.File;

import java.io.IOException;

class TargetFileListFrame extends Frame implements DropTargetListener {

    private List list = new List(URIListToFileListBetweenJVMsTest.VISIBLE_RAWS_IN_LIST);

    private int expectationTransferredFilesNumber;

    TargetFileListFrame(Point location, int expectationTransferredFilesNumber) {

        this.expectationTransferredFilesNumber = expectationTransferredFilesNumber;

        initGUI(location);

        setDropTarget(new DropTarget(list, DnDConstants.ACTION_COPY, this));

    }

    private void initGUI(Point location) {

        this.setLocation(location);

        this.addWindowListener(new WindowAdapter() {

            public void windowClosing(WindowEvent e) {

                TargetFileListFrame.this.dispose();

            }

        });

        this.add(new Panel().add(list));

        this.pack();

        this.setVisible(true);

    }

    public void dragEnter(DropTargetDragEvent dtde) {

        if (dtde.getCurrentDataFlavorsAsList().contains(DataFlavor.javaFileListFlavor)) {

            dtde.acceptDrag(DnDConstants.ACTION_COPY);

        }

    }

    public void dragOver(DropTargetDragEvent dtde) {

        if (dtde.getCurrentDataFlavorsAsList().contains(DataFlavor.javaFileListFlavor)) {

            dtde.acceptDrag(DnDConstants.ACTION_COPY);

        }

    }

    public void dropActionChanged(DropTargetDragEvent dtde) {

        if (dtde.getCurrentDataFlavorsAsList().contains(DataFlavor.javaFileListFlavor)) {

            dtde.acceptDrag(DnDConstants.ACTION_COPY);

        }

    }

    public void dragExit(DropTargetEvent dte) {}

    public void drop(DropTargetDropEvent dtde) {

        list.removeAll();

        dtde.acceptDrop(DnDConstants.ACTION_COPY);

        java.util.List<File> fileList = extractListOfFiles(dtde);

        for (File file:fileList) {

            list.add(file.getName());

        }

        if (fileList.size() != expectationTransferredFilesNumber)

        {

            System.err.println("ERROR: Expected file number:"

                    + expectationTransferredFilesNumber

                    + "; Received file number: "

                    + fileList.size());

            TargetFileListFrame.this.dispose();

            System.exit(InterprocessMessages.WRONG_FILES_NUMBER_ON_TARGET);

        }

        TargetFileListFrame.this.dispose();

    }

    private java.util.List<File> extractListOfFiles(DropTargetDropEvent dtde) {

        java.util.List<File> fileList = null;

        try {

            fileList = (java.util.List<File>)dtde.getTransferable().getTransferData(DataFlavor.javaFileListFlavor);

        } catch (UnsupportedFlavorException | IOException e) {

            e.printStackTrace();

        }

        return fileList;

    }

    Point getDropTargetPoint() {

       return new Point((int)list.getLocationOnScreen().getX()+(list.getWidth()/2),

                        (int)list.getLocationOnScreen().getY()+(list.getHeight()/2));

    }

}