/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.motorola.studio.android.emulator.device.ui.wizard;

import java.io.File;
import java.util.Properties;

import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.sequoyah.device.framework.ui.wizard.IInstanceProperties;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;

import com.motorola.studio.android.common.log.StudioLogger;
import com.motorola.studio.android.emulator.core.exception.SkinException;
import com.motorola.studio.android.emulator.core.skin.IAndroidSkin;
import com.motorola.studio.android.emulator.core.skin.SkinFramework;
import com.motorola.studio.android.emulator.device.IDevicePropertiesConstants;
import com.motorola.studio.android.emulator.device.instance.options.StartupOptionsMgt;
import com.motorola.studio.android.emulator.device.ui.AbstractPropertiesComposite;
import com.motorola.studio.android.emulator.device.ui.AbstractPropertiesComposite.PropertyCompositeChangeEvent;
import com.motorola.studio.android.emulator.device.ui.AbstractPropertiesComposite.PropertyCompositeChangeListener;
import com.motorola.studio.android.emulator.device.ui.StartupOptionsComposite;
import com.motorola.studio.android.emulator.i18n.EmulatorNLS;
import com.motorola.studio.android.nativeos.NativeUIUtils;

/**
 * DESCRIPTION:
 * <br>
 * This class represents the second wizard page for Android Emulator Device Instance creation.
 * <br>
 * It shows all startup options information and validates it, setting an appropriate error message when
 * applicable.
 * <br>
 * RESPONSIBILITY:
 * <br>
 * - Allow user to enter startup options information for creating a new Android Emulator Device Instance
 * <br>
 * - Validates tartup options information entered by user
 * <br>
 * COLABORATORS:
 * <br>
 * WizardPage: extends this class
 * <br>
 * StartupOptionsMainComposite: uses this composite as the main widget
 * <br>
 * USAGE:
 * <br>
 * This wizard page must be added as the second page on the class implementing the New Android
 * Emulator Device Instance Wizard.
 */
public class WizardStartupOptionsPage extends WizardPage implements IInstanceProperties
{
    private StartupOptionsComposite startupOptionsComposite;

    private IAndroidSkin skin;

    // handle changes
    private final PropertyCompositeChangeListener compositeChangeListener =
            new PropertyCompositeChangeListener()
            {
                public void compositeChanged(PropertyCompositeChangeEvent e)
                {
                    String errorMessage = startupOptionsComposite.getErrorMessage();
                    if (errorMessage != null)
                    {
                        setErrorMessage(errorMessage);
                        setPageComplete(false);
                    }
                    else
                    {
                        setErrorMessage(null);
                        setPageComplete(true);
                    }
                }
            };

    /**
     * Creates a WizardMainPage object.
     */
    public WizardStartupOptionsPage()
    {
        super(EmulatorNLS.UI_WizardStartupOptionsPage_PageMessage);

    }

    /**
     * Creates the UI for this wizard page.
     * It uses the PropertiesMainComposite only.
     */
    public void createControl(Composite parent)
    {
        // Get selected Skin name
        WizardMainPage page = (WizardMainPage) this.getPreviousPage();
        boolean canCalculateScale = true;
        try
        {
            if (page.getSkinId() != null)
            {
                SkinFramework sm = new SkinFramework();
                skin =
                        sm.getSkinById(page.getSkinId(), new File(page.getVmTarget().getLocation()
                                + "skins" + File.separator + page.getVmSkin()));
            }
        }
        catch (SkinException e)
        {
            StudioLogger.error(this.getClass(),
                    "Error reading instance skin during startup options page creation", e);
            canCalculateScale = false;
        }

        setTitle(EmulatorNLS.UI_General_WizardTitle);
        setErrorMessage(null);
        if (getMessage() != null)
        {
            setMessage(EmulatorNLS.UI_WizardStartupOptionsPage_PageMessage);
        }

        // Define layout
        GridLayout mainLayout = new GridLayout(1, false);
        mainLayout.marginTop = 0;
        mainLayout.marginWidth = 0;
        mainLayout.marginHeight = 0;

        // Create Startup Options area    
        startupOptionsComposite =
                new StartupOptionsComposite(parent, NativeUIUtils.getDefaultCommandLine(), skin,
                        canCalculateScale);

        AbstractPropertiesComposite.addCompositeChangeListener(compositeChangeListener);

        // Set layout
        startupOptionsComposite.setLayout(mainLayout);

        setControl(startupOptionsComposite);

        setPageComplete(true);
    }

    @Override
    public boolean isPageComplete()
    {
        boolean isComplete = true;
        if (startupOptionsComposite != null)
        {
            isComplete = (startupOptionsComposite.getErrorMessage() == null);
        }
        return isComplete;
    }

    @Override
    public void dispose()
    {
        AbstractPropertiesComposite.removeCompositeChangeListener(compositeChangeListener);
        setControl(null);
        if (startupOptionsComposite != null)
        {
            startupOptionsComposite.dispose();
            startupOptionsComposite = null;
        }
        super.dispose();
    }

    public Properties getProperties()
    {
        Properties properties = new Properties();

        if (startupOptionsComposite == null)
        {
            properties.setProperty(IDevicePropertiesConstants.commandline,
                    NativeUIUtils.getDefaultCommandLine());

        }
        else
        {
            properties.setProperty(IDevicePropertiesConstants.commandline,
                    StartupOptionsMgt.getParamList());
        }

        return properties;
    }
}