/*
 * 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.devices;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.sequoyah.device.framework.model.IDeviceTypeDropSupport;
import org.eclipse.sequoyah.device.framework.model.IInstance;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.FileTransfer;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.ui.PlatformUI;

import com.motorola.studio.android.adt.DDMSFacade;
import com.motorola.studio.android.adt.DDMSUtils;
import com.motorola.studio.android.adt.InstallPackageBean;
import com.motorola.studio.android.i18n.AndroidNLS;
import com.motorola.studio.android.wizards.installapp.DeployWizard.INSTALL_TYPE;

public abstract class AbstractDeviceDropSupportHandler implements IDeviceTypeDropSupport
{

    private DropTargetEvent lastEvent = null;

    private List<File> availableAPKs = null;

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.eclipse.sequoyah.device.framework.model.IDeviceTypeDropSupport#canDrop
     * (org.eclipse.sequoyah.device.framework.model.IInstance,
     * org.eclipse.swt.dnd.TransferData, org.eclipse.swt.dnd.DropTargetEvent)
     */
    public boolean canDrop(IInstance instance, TransferData data, DropTargetEvent event)
    {
        return (((getFiles(event) != null) && (getFiles(event).size() > 0)) || !Platform.OS_WIN32
                .equals(Platform.getOS()));
    }

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.eclipse.sequoyah.device.framework.model.IDeviceTypeDropSupport#drop
     * (org.eclipse.sequoyah.device.framework.model.IInstance,
     * org.eclipse.swt.dnd.TransferData, org.eclipse.swt.dnd.DropTargetEvent)
     */
    public void drop(final IInstance instance, TransferData data, DropTargetEvent event)
    {
        final List<File> files = getFiles(event);
        Job installApksJob =
                new Job(AndroidNLS.AbstractDeviceDropSupportHandler_InstallingApksJobName)
                {
                    @Override
                    protected IStatus run(IProgressMonitor monitor)
                    {
                        final List<File> failedFiles = new ArrayList<File>();
                        availableAPKs = null;
                        if (files != null)
                        {
                            for (File apk : files)
                            {
                                IStatus installationStatus = installAPK(apk, instance);
                                if (!installationStatus.isOK())
                                {
                                    failedFiles.add(apk);
                                }
                            }
                        }

                        if (failedFiles.size() > 0)
                        {
                            PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable()
                            {
                                public void run()
                                {
                                    StringBuilder builder = new StringBuilder();

                                    builder.append(AndroidNLS.AbstractDeviceDropSupportHandler_ApplicationsFailed);
                                    builder.append("\n"); //$NON-NLS-1$
                                    for (File f : failedFiles)
                                    {
                                        builder.append("\n"); //$NON-NLS-1$
                                        builder.append(f.getName());
                                    }
                                    MessageDialog.openInformation(PlatformUI.getWorkbench()
                                            .getActiveWorkbenchWindow().getShell(),
                                            AndroidNLS.UI_InstallApp_InstallApp, builder.toString());

                                }
                            });
                        }

                        return Status.OK_STATUS;
                    }
                };

        installApksJob.schedule();
        lastEvent = null;
    }

    private synchronized IStatus installAPK(File apk, final IInstance instance)
    {
        final InstallPackageBean installBean = new InstallPackageBean();
        installBean.setCanOverwrite(INSTALL_TYPE.UNINSTALL);
        installBean.setPackagePath(apk.getAbsolutePath());

        return DDMSUtils.installPackage(DDMSFacade.getSerialNumberByName(instance.getName()),
                installBean);

    }

    protected List<File> getFiles(DropTargetEvent event)
    {

        if ((lastEvent == null) || (lastEvent != event))
        {
            lastEvent = event;
            availableAPKs = new ArrayList<File>();

            if (FileTransfer.getInstance().isSupportedType(event.currentDataType))
            {
                String[] files =
                        (String[]) FileTransfer.getInstance().nativeToJava(event.currentDataType);

                // On MacOSX the files are not available until drop
                if (files == null)
                {
                    try
                    {
                        files = (String[]) event.data;
                    }
                    catch (Exception e)
                    {
                        // do nothing
                        files = null;
                    }
                }

                if (files != null)
                {

                    for (int i = 0; (i < files.length); i++)
                    {
                        String filePath = files[i];
                        if (filePath.toLowerCase().endsWith(".apk")) //$NON-NLS-1$
                        {
                            File f = new File(filePath);
                            if (f.exists() && f.isFile() && f.canRead())
                            {
                                availableAPKs.add(f);
                            }
                        }
                    }
                }

            }

        }

        return availableAPKs;
    }
}