/*
 * Copyright (c) 2011, 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.workbench.toolkit.impl;

import org.jowidgets.api.model.item.IMenuModel;
import org.jowidgets.api.model.item.IToolBarModel;
import org.jowidgets.common.image.IImageConstant;
import org.jowidgets.common.types.IVetoable;
import org.jowidgets.workbench.api.IView;
import org.jowidgets.workbench.api.IViewContext;
import org.jowidgets.workbench.api.IWorkbenchApplication;
import org.jowidgets.workbench.api.IWorkbenchApplicationContext;
import org.jowidgets.workbench.toolkit.api.IWorkbenchApplicationModel;
import org.jowidgets.workbench.toolkit.api.IWorkbenchPartModelListener;

class WorkbenchApplication extends ComponentNodeContainer implements IWorkbenchApplication {

    private final IWorkbenchApplicationModel model;

    private IToolBarModel toolBar;
    private IMenuModel popupMenu;
    private IMenuModel toolBarMenu;

    private IWorkbenchApplicationContext context;
    private IWorkbenchPartModelListener workbenchPartModelListener;

    WorkbenchApplication(final IWorkbenchApplicationModel model) {
        super(model);
        this.model = model;
    }

    @Override
    public void onContextInitialize(final IWorkbenchApplicationContext context) {
        super.initialize(context);

        this.context = context;

        this.workbenchPartModelListener = new IWorkbenchPartModelListener() {
            @Override
            public void modelChanged() {
                onModelChanged(context);
            }
        };

        model.addWorkbenchPartModelListener(workbenchPartModelListener);

        onModelChanged(context);

        if (model.getInitializeCallback() != null) {
            model.getInitializeCallback().onContextInitialize(new ModelBasedWorkbenchApplicationContext(context, model));
        }
    }

    @Override
    public IView createView(final String viewId, final IViewContext viewContext) {
        if (model.getViewFactory() != null) {
            return model.getViewFactory().createView(viewId, viewContext);
        }
        return null;
    }

    @Override
    public String getId() {
        return model.getId();
    }

    @Override
    public String getLabel() {
        return model.getLabel();
    }

    @Override
    public String getTooltip() {
        return model.getTooltip();
    }

    @Override
    public IImageConstant getIcon() {
        return model.getIcon();
    }

    @Override
    public void onActiveStateChanged(final boolean active) {
        if (model.getLifecycleCallback() != null) {
            model.getLifecycleCallback().onActiveStateChanged(active);
        }
    }

    @Override
    public void onVisibleStateChanged(final boolean visible) {
        if (model.getLifecycleCallback() != null) {
            model.getLifecycleCallback().onVisibleStateChanged(visible);
        }
    }

    @Override
    public void onClose(final IVetoable vetoable) {
        if (model.getLifecycleCallback() != null) {
            model.getLifecycleCallback().onClose(vetoable);
        }
    }

    @Override
    public void onDispose() {
        if (model.getLifecycleCallback() != null) {
            model.getLifecycleCallback().onDispose();
        }
    }

    private void onModelChanged(final IWorkbenchApplicationContext context) {
        if (toolBar != model.getToolBar()) {
            onToolBarChanged(context);
        }
        if (popupMenu != model.getPopupMenu()) {
            onPopupMenuChanged(context);
        }
        if (toolBarMenu != model.getToolBarMenu()) {
            onToolBarMenuChanged(context);
        }
    }

    private void onToolBarChanged(final IWorkbenchApplicationContext context) {
        if (toolBar != null) {
            toolBar.unbind(context.getToolBar());
        }
        if (model.getToolBar() != null) {
            model.getToolBar().bind(context.getToolBar());
        }
        else {
            context.getToolBar().removeAllItems();
        }
        toolBar = model.getToolBar();
    }

    private void onPopupMenuChanged(final IWorkbenchApplicationContext context) {
        if (popupMenu != null) {
            popupMenu.unbind(context.getPopupMenu());
        }
        if (model.getPopupMenu() != null) {
            model.getPopupMenu().bind(context.getPopupMenu());
        }
        else {
            context.getPopupMenu().removeAllItems();
        }
        popupMenu = model.getPopupMenu();
    }

    private void onToolBarMenuChanged(final IWorkbenchApplicationContext context) {
        if (toolBarMenu != null) {
            toolBarMenu.unbind(context.getToolBarMenu());
        }
        if (model.getToolBarMenu() != null) {
            model.getToolBarMenu().bind(context.getToolBarMenu());
        }
        else {
            context.getToolBarMenu().removeAllItems();
        }
        toolBarMenu = model.getToolBarMenu();
    }

    @Override
    void dispose() {
        super.dispose();
        if (context != null) {
            if (toolBar != null) {
                toolBar.unbind(context.getToolBar());
            }
            if (popupMenu != null) {
                popupMenu.unbind(context.getPopupMenu());
            }
            if (toolBarMenu != null) {
                toolBarMenu.unbind(context.getToolBarMenu());
            }
            if (workbenchPartModelListener != null) {
                model.removeWorkbenchPartModelListener(workbenchPartModelListener);
            }
        }
    }

}