/*
 * 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.widgets.basic;

import org.jowidgets.api.command.IAction;
import org.jowidgets.api.controller.IDisposeListener;
import org.jowidgets.api.model.item.IActionItemModel;
import org.jowidgets.api.model.item.IItemModel;
import org.jowidgets.api.model.item.IItemModelListener;
import org.jowidgets.api.model.item.IMenuItemModel;
import org.jowidgets.api.widgets.IActionMenuItem;
import org.jowidgets.api.widgets.IMenu;
import org.jowidgets.api.widgets.descriptor.setup.IAccelerateableMenuItemSetup;
import org.jowidgets.common.widgets.controller.IActionListener;
import org.jowidgets.common.widgets.controller.IMenuListener;
import org.jowidgets.impl.base.delegate.ItemModelBindingDelegate;
import org.jowidgets.impl.base.delegate.MenuItemDisposableDelegate;
import org.jowidgets.impl.command.ActionExecuter;
import org.jowidgets.impl.command.ActionWidgetSync;
import org.jowidgets.impl.command.IActionWidget;
import org.jowidgets.impl.model.item.ActionItemModelBuilder;
import org.jowidgets.impl.widgets.common.wrapper.ActionMenuItemSpiWrapper;
import org.jowidgets.impl.widgets.common.wrapper.invoker.ActionMenuItemSpiInvoker;
import org.jowidgets.spi.widgets.IActionMenuItemSpi;

public class ActionMenuItemImpl extends ActionMenuItemSpiWrapper implements IActionMenuItem, IActionWidget {

    private final IMenu parent;
    private final IItemModelListener modelListener;
    private final IMenuListener parentMenuListener;
    private final MenuItemDisposableDelegate disposableDelegate;

    private ActionWidgetSync actionWidgetSync;
    private ActionExecuter actionExecuter;
    private IAction action;

    private boolean onItemChange;

    public ActionMenuItemImpl(
        final IMenu parent,
        final IActionMenuItemSpi actionMenuItemSpi,
        final IAccelerateableMenuItemSetup setup) {
        super(actionMenuItemSpi, new ItemModelBindingDelegate(
            new ActionMenuItemSpiInvoker(actionMenuItemSpi),
            new ActionItemModelBuilder().build()));

        this.parent = parent;
        this.disposableDelegate = new MenuItemDisposableDelegate(this, getItemModelBindingDelegate());

        setText(setup.getText());
        setToolTipText(setup.getToolTipText());
        setIcon(setup.getIcon());

        if (setup.getAccelerator() != null) {
            setAccelerator(setup.getAccelerator());
        }

        if (setup.getMnemonic() != null) {
            setMnemonic(setup.getMnemonic().charValue());
        }

        this.modelListener = new IItemModelListener() {
            @Override
            public void itemChanged(final IItemModel item) {
                final IAction newAction = getModel().getAction();
                if (!onItemChange && newAction != action) {
                    onItemChange = true;
                    setActionValue(newAction);
                    onItemChange = false;
                }
            }
        };

        getModel().addItemModelListener(modelListener);

        this.parentMenuListener = new IMenuListener() {

            @Override
            public void menuActivated() {
                if (actionWidgetSync != null) {
                    actionWidgetSync.setActive(true);
                }
            }

            @Override
            public void menuDeactivated() {
                if (actionWidgetSync != null) {
                    actionWidgetSync.setActive(false);
                }
            }

        };

        parent.addMenuListener(parentMenuListener);

        addActionListener(new IActionListener() {
            @Override
            public void actionPerformed() {
                if (actionExecuter != null) {
                    actionExecuter.execute();
                }
            }
        });

    }

    @Override
    public IMenu getParent() {
        return parent;
    }

    @Override
    public void setAction(final IAction action) {
        setActionValue(action);
        getModel().removeItemModelListener(modelListener);
        getModel().setAction(action);
        getModel().addItemModelListener(modelListener);
    }

    private void setActionValue(final IAction action) {
        if (this.action != action) {

            if (action != null) {

                if (action.getAccelerator() != null) {
                    setAccelerator(action.getAccelerator());
                }

                if (action.getMnemonic() != null) {
                    setMnemonic(action.getMnemonic().charValue());
                }
            }

            //dispose the old sync if exists
            disposeActionWidgetSync();

            if (action != null) {
                actionWidgetSync = new ActionWidgetSync(action, this);
                actionExecuter = new ActionExecuter(action, this);
            }

            this.action = action;
        }
    }

    @Override
    public void addDisposeListener(final IDisposeListener listener) {
        disposableDelegate.addDisposeListener(listener);
    }

    @Override
    public void removeDisposeListener(final IDisposeListener listener) {
        disposableDelegate.removeDisposeListener(listener);
    }

    @Override
    public boolean isDisposed() {
        return disposableDelegate.isDisposed();
    }

    @Override
    public void dispose() {
        if (!isDisposed()) {
            parent.removeMenuListener(parentMenuListener);
            getModel().removeItemModelListener(modelListener);
            disposeActionWidgetSync();
            disposableDelegate.dispose();
        }
    }

    private void disposeActionWidgetSync() {
        if (actionWidgetSync != null) {
            actionWidgetSync.dispose();
            actionWidgetSync = null;
        }
    }

    @Override
    public void setModel(final IActionItemModel model) {
        if (getModel() != null) {
            getModel().removeItemModelListener(modelListener);
        }
        getItemModelBindingDelegate().setModel(model);
        setActionValue(model.getAction());
        model.addItemModelListener(modelListener);
    }

    @Override
    public void setModel(final IMenuItemModel model) {
        if (model instanceof IActionItemModel) {
            setModel((IActionItemModel) model);
        }
        else {
            throw new IllegalArgumentException("Model type '" + IActionItemModel.class.getName() + "' expected");
        }
    }

    @Override
    public String toString() {
        return "ActionMenuItemImpl [action=" + action + ", getText()=" + getText() + "]";
    }

}