/*
 * Copyright (c) 2014, grossmann
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

package org.jowidgets.impl.dnd;

import java.util.Collection;
import java.util.Set;

import org.jowidgets.api.clipboard.TransferType;
import org.jowidgets.api.dnd.IDragSource;
import org.jowidgets.common.dnd.DropAction;
import org.jowidgets.common.types.IVetoable;
import org.jowidgets.spi.clipboard.TransferTypeSpi;
import org.jowidgets.spi.dnd.IDragDataResponseSpi;
import org.jowidgets.spi.dnd.IDragEventSpi;
import org.jowidgets.spi.dnd.IDragSourceListenerSpi;
import org.jowidgets.spi.dnd.IDragSourceSpi;
import org.jowidgets.util.Assert;

public final class DragSourceImpl extends AbstractDragSourceObservable implements IDragSource {

    private final IDragSourceSpi dragSourceSpi;
    private final IDragSourceListenerSpi dragSourceListenerSpi;
    private final DragDropDelegate dragDropDelegate;

    public DragSourceImpl(final IDragSourceSpi dragSourceSpi) {
        Assert.paramNotNull(dragSourceSpi, "dragSourceSpi");

        this.dragSourceSpi = dragSourceSpi;
        this.dragSourceListenerSpi = new DragSourceListenerSpi();
        this.dragDropDelegate = new DragDropDelegate(new IDragDropSpiSupport() {

            @Override
            public void setTransferTypesSpi(final Collection<TransferTypeSpi> supportedTypes) {
                dragSourceSpi.setTransferTypes(supportedTypes);
            }

            @Override
            public void setActionsSpi(final Set<DropAction> actions) {
                dragSourceSpi.setActions(actions);
            }
        });
    }

    @Override
    public void setTransferTypes(final Collection<TransferType<?>> types) {
        dragDropDelegate.setTransferTypes(types);
    }

    @Override
    public void setTransferTypes(final TransferType<?>... supportedTypes) {
        dragDropDelegate.setTransferTypes(supportedTypes);
    }

    @Override
    public void setActions(final Set<DropAction> actions) {
        dragDropDelegate.setActions(actions);
    }

    @Override
    public void setActions(final DropAction... actions) {
        dragDropDelegate.setActions(actions);
    }

    @Override
    protected void setActive(final boolean active) {
        if (active) {
            dragSourceSpi.addDragSourceListenerSpi(dragSourceListenerSpi);
        }
        else {
            dragSourceSpi.removeDragSourceListenerSpi(dragSourceListenerSpi);
        }
    }

    private final class DragSourceListenerSpi implements IDragSourceListenerSpi {

        @Override
        public void dragStart(final IDragEventSpi event, final IVetoable veto) {
            fireDragStart(new DragEventImpl(event), veto);
        }

        @Override
        public void dragSetData(
            final IDragEventSpi event,
            final IVetoable veto,
            final TransferTypeSpi transferTypeSpi,
            final IDragDataResponseSpi dragData) {
            final TransferType<?> transferType = dragDropDelegate.getTransferType(transferTypeSpi);
            fireDragSetData(new DragEventImpl(event), veto, transferType, new DragDataResponseImpl(dragData));
        }

        @Override
        public void dragFinished(final IDragEventSpi event, final DropAction dropAction) {
            fireDragFinished(new DragEventImpl(event), dropAction);
        }

    }

}