/*
 * Copyright (c) 2010, 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.toolkit;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import org.jowidgets.api.controller.IDisposeListener;
import org.jowidgets.api.toolkit.Toolkit;
import org.jowidgets.api.widgets.IWindow;
import org.jowidgets.api.widgets.blueprint.IFrameBluePrint;
import org.jowidgets.common.widgets.IWidgetCommon;
import org.jowidgets.common.widgets.factory.IGenericWidgetFactory;
import org.jowidgets.common.widgets.factory.IWidgetFactoryListener;
import org.jowidgets.impl.widgets.basic.FrameImpl;
import org.jowidgets.spi.IWidgetsServiceProvider;
import org.jowidgets.spi.widgets.IFrameWrapperSpi;
import org.jowidgets.spi.widgets.controller.IDisposeListenerSpi;

public class WindowProvider {

    private final IGenericWidgetFactory genericWidgetFactory;
    private final IWidgetsServiceProvider widgetsServiceProvider;
    private final Map<Object, IWindow> uiReferenceToWindow;

    public WindowProvider(
        final IGenericWidgetFactory genericWidgetFactory,
        final IWidgetsServiceProvider widgetsServiceProvider) {

        this.genericWidgetFactory = genericWidgetFactory;
        this.uiReferenceToWindow = new HashMap<Object, IWindow>();
        this.widgetsServiceProvider = widgetsServiceProvider;

        genericWidgetFactory.addWidgetFactoryListener(new IWidgetFactoryListener() {

            @Override
            public void widgetCreated(final IWidgetCommon widget) {
                if (widget instanceof IWindow) {
                    final IWindow windowWidget = (IWindow) widget;
                    //If a WindowWidget wraps another WindowWidget it will be assumed, 
                    //that the newer window wraps the previous window with the same ui reference.
                    //From now, the wrapping window will returned for the active window
                    final Object uiReference = windowWidget.getUiReference();
                    uiReferenceToWindow.put(uiReference, windowWidget);

                    windowWidget.addDisposeListener(new IDisposeListener() {
                        @Override
                        public void onDispose() {
                            uiReferenceToWindow.remove(uiReference);
                        }
                    });
                }

            }
        });
    }

    public IWindow getActiveWindow() {
        final Object activeWindowUiReference = widgetsServiceProvider.getActiveWindowUiReference();
        IWindow activeWindow = uiReferenceToWindow.get(widgetsServiceProvider.getActiveWindowUiReference());

        //maybe window would be created without jo-widgets, so create a wrapper, if possible
        if (activeWindowUiReference != null && activeWindow == null) {
            activeWindow = createWrapper(activeWindowUiReference);

        }
        return activeWindow;
    }

    public List<IWindow> getAllWindows() {
        final List<IWindow> result = new LinkedList<IWindow>();
        for (final Object uiRef : widgetsServiceProvider.getAllWindowsUiReference()) {
            IWindow window = uiReferenceToWindow.get(uiRef);
            if (window == null) {
                window = createWrapper(uiRef);
            }
            if (window != null) {
                result.add(window);
            }
        }
        return result;
    }

    private IWindow createWrapper(final Object uiRef) {
        if (widgetsServiceProvider.getWidgetFactory().isConvertibleToFrame(uiRef)) {

            final IFrameBluePrint bp = Toolkit.getBluePrintFactory().frame().autoCenterOff();
            final IFrameWrapperSpi frameSpi = widgetsServiceProvider.getWidgetFactory().createFrame(genericWidgetFactory, uiRef);
            final IWindow result = new FrameImpl(frameSpi, bp, true);

            //register the created frame to avoid a new creation for every call of this method
            uiReferenceToWindow.put(uiRef, result);

            frameSpi.addDisposeListener(new IDisposeListenerSpi() {
                @Override
                public void afterDispose() {
                    if (!result.isDisposed()) {
                        result.dispose();
                    }
                    uiReferenceToWindow.remove(uiRef);
                }
            });

            return result;
        }
        return null;
    }
}