/*******************************************************************************
 * sdr-trunk
 * Copyright (C) 2014-2018 Dennis Sheirer
 *
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by  the Free Software Foundation, either version 3 of the License, or  (at your option) any
 * later version.
 *
 * This program is distributed in the hope that it will be useful,  but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License  along with this program.
 * If not, see <http://www.gnu.org/licenses/>
 *
 ******************************************************************************/

package io.github.dsheirer.gui;

import com.google.common.eventbus.Subscribe;
import io.github.dsheirer.eventbus.MyEventBus;
import io.github.dsheirer.gui.preference.PreferenceEditorViewRequest;
import io.github.dsheirer.gui.preference.PreferencesEditor;
import io.github.dsheirer.preference.UserPreferences;
import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.stage.Stage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Java FX window manager.  Handles all secondary Java FX windows that are used within this primarily
 * Swing application.
 */
public class JavaFxWindowManager
{
    private final static Logger mLog = LoggerFactory.getLogger(JavaFxWindowManager.class);

    private UserPreferences mUserPreferences;
    private PreferencesEditor mPreferencesEditor;

    public JavaFxWindowManager(UserPreferences userPreferences)
    {
        mUserPreferences = userPreferences;

        //Register this class to receive events via each method annotated with @Subscribe
        MyEventBus.getEventBus().register(this);
    }

    /**
     * Closes all JavaFX windows and shuts down the FX thread
     */
    public void shutdown()
    {
        Platform.exit();
    }

    @Subscribe
    public void process(final PreferenceEditorViewRequest request)
    {
        if(mPreferencesEditor == null)
        {
            new JFXPanel();
            Platform.setImplicitExit(false);
            Platform.runLater(() -> {
                try
                {
                    mPreferencesEditor = new PreferencesEditor(mUserPreferences);

                    Stage stage = new Stage();
                    stage.setOnHidden(event -> mPreferencesEditor = null);
                    mPreferencesEditor.start(stage);
                    mPreferencesEditor.showEditor(request);
                }
                catch(Throwable e)
                {
                    mLog.error("Error launching user preferences window", e);
                }
            });
        }
        else
        {
            Platform.runLater(() -> {
                try
                {
                    Stage stage = mPreferencesEditor.getStage();
                    stage.show();
                    stage.toFront();
                    stage.requestFocus();
                    mPreferencesEditor.showEditor(request);
                }
                catch(Throwable t)
                {
                    mLog.error("Error showing existing preferences editor window", t);
                }
            });
        }
    }
}