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/*
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.flexdock.docking.drag;

import java.awt.Component;
import java.awt.EventQueue;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.HashMap;

import org.flexdock.docking.DockingConstants;
import org.flexdock.docking.DockingPort;
import org.flexdock.docking.defaults.DefaultDockingPort;
import org.flexdock.docking.drag.effects.EffectsManager;
import org.flexdock.docking.drag.effects.RubberBand;
import org.flexdock.util.RootWindow;
import org.flexdock.util.SwingUtility;

public class DragPipeline {

    private GlassPaneMonitor paneMonitor;
    private RootWindow[] windows;
    private HashMap rootWindowsByBounds;
    private DragGlasspane currentGlasspane;
    private DragGlasspane newGlassPane;
    private Rectangle[] windowBounds;
    private boolean heavyweightDockableSupportted;

    private boolean open;
    private DragOperation dragToken;
    private RubberBand rubberBand;

    public DragPipeline() {
        paneMonitor = new GlassPaneMonitor();
        rubberBand = EffectsManager.getRubberBand();
    }

    public boolean isOpen() {
        return open;
    }

    public void open(DragOperation token) {
        if(token==null) {
            throw new NullPointerException("'token' parameter cannot be null.");
        }

        if(EventQueue.isDispatchThread()) {
            openImpl(token);
            return;
        }


        final DragOperation dToken = token;
        try {
            EventQueue.invokeAndWait(new Runnable() {
                @Override
                public void run() {
                    openImpl(dToken);
                }
            });
        } catch(Exception e) {
            System.err.println("Exception: " +e.getMessage());
        }
    }

    private void openImpl(DragOperation operation) {
        // check to see if we're going to support heavyweight dockables for this operation
        heavyweightDockableSupportted = Boolean.getBoolean(DockingConstants.HEAVYWEIGHT_DOCKABLES);

        this.dragToken = operation;

        // turn the current drag operation on
        setCurrentDragOperation(operation);

        windows = RootWindow.getVisibleWindows();

        windowBounds = new Rectangle[windows.length];
        rootWindowsByBounds = new HashMap();

        for(int i=0; i