/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

package com.nokia.carbide.remoteconnections.interfaces;

import com.nokia.carbide.installpackages.InstallPackages;

import com.nokia.carbide.installpackages.InstallPackages.IServerData;

import com.nokia.carbide.installpackages.gen.InstallPackages.PackageType;

import com.nokia.carbide.remoteconnections.Messages;

import com.nokia.carbide.remoteconnections.RemoteConnectionsActivator;

import com.nokia.carbide.remoteconnections.interfaces.IRemoteAgentInstallerProvider;

import org.apache.commons.httpclient.HttpClient;

import org.apache.commons.httpclient.methods.GetMethod;

import org.eclipse.core.runtime.*;

import org.eclipse.jface.operation.IRunnableContext;

import org.eclipse.jface.operation.IRunnableWithProgress;

import org.eclipse.jface.resource.ImageDescriptor;

import org.eclipse.swt.graphics.Image;

import org.osgi.framework.Version;

import java.io.ByteArrayInputStream;

import java.io.InputStream;

import java.lang.reflect.InvocationTargetException;

import java.util.*;

public abstract class AbstractPackageInstallerProvider implements IRemoteAgentInstallerProvider {

	public class PackageTypeInstaller implements IRemoteAgentInstaller {

		private class PackageContents implements IPackageContents {

			public PackageContents(String defaultFileName, InputStream inputStream) {

				this.defaultFileName = ""; //$NON-NLS-1$

				if (defaultFileName != null)

					this.defaultFileName = defaultFileName;

				this.inputStream = inputStream;

			}

			private String defaultFileName;

			private InputStream inputStream;

			public String getDefaultNameFileName() {

				return defaultFileName;

			}

			public InputStream getInputStream() {

				return inputStream;

			}

		}

		private InstallPackages packages;

		private PackageType packageType;

		public PackageTypeInstaller(InstallPackages packages, PackageType packageType) {

			this.packages = packages;

			this.packageType = packageType;

		}

		private boolean isArchive(PackageType pkg) {

			IPath path = new Path(pkg.getInstallFilePath());

			String extension = path.getFileExtension();

			return ZIPEXT.equalsIgnoreCase(extension);

		}

		public boolean fileSupportsInstall() {

			return !isArchive(packageType);

		}

		public Image getImage() {

			return getCachedImage(isArchive(packageType) ? ZIPFILEIMGDESC : INSTALLFILEIMGDESC);

		}

		public String getInformation() {

			return packageType.getInformation();

		}

		public String getLabel() {

			return packageType.getDisplayName();

		}

		public Version getInstallerVersion() {

			try {

				return new Version(packageType.getPackageVersion());

			}

			catch (IllegalArgumentException e) {

				RemoteConnectionsActivator.logError(e);

			}

			return null;

		}

		public IPackageContents getPackageContents(IRunnableContext runnableContext) {

			InputStream inputStream = null;

			String installFileUrl = null;

			try {

				installFileUrl = getInstallFileUrl(runnableContext);

				inputStream = getInstallFile(installFileUrl, runnableContext);

			} catch (Exception e) {

				RemoteConnectionsActivator.logError(e);

			}

			String defaultFileName = null;

			if (installFileUrl != null)

				defaultFileName = new Path(installFileUrl).lastSegment();

			return new PackageContents(defaultFileName, inputStream);

		}

		private ByteArrayInputStream getInstallFile(String installFileUrl, IRunnableContext runnableContext) throws Exception {

			GetMethod getMethod = new GetMethod(installFileUrl);

			HttpClient client = new HttpClient();

			InstallPackages.setProxyData(client, getMethod);

	        client.getHttpConnectionManager().getParams().setConnectionTimeout(8000);

	        int serverStatus = 0;

	        byte[] responseBody;

			try {

				serverStatus = client.executeMethod(getMethod);

				responseBody = getMethod.getResponseBody();

			} catch (Exception e) {

				// could be HttpException or IOException

				throw new Exception(e);

			} finally {

				getMethod.releaseConnection();

			}

	        // HTTP status codes: 2xx = Success

	    	if (serverStatus >= 200 && serverStatus < 300) {

	            return new ByteArrayInputStream(responseBody);

	    	}

	       return null;

		}

		private String getInstallFileUrl(IRunnableContext runnableContext) {

			final String[] installFileUrl = { null };

			try {

				runnableContext.run(false, false, new IRunnableWithProgress() {

					public void run(IProgressMonitor monitor) throws InvocationTargetException,	InterruptedException {

						monitor.beginTask(Messages.getString("AbstractPackageInstallerProvider.DownloadingAgentJobLabel"), IProgressMonitor.UNKNOWN); //$NON-NLS-1$

						installFileUrl[0] = packages.getInstallUrlString(packageType.getInstallFilePath());

					}

				});

			} catch (Exception e) {

				RemoteConnectionsActivator.logError(e);

			}

			return installFileUrl[0];

		}

	}

	protected static final String ZIPEXT = "ZIP"; //$NON-NLS-1$

	protected static final ImageDescriptor ZIPFILEIMGDESC = RemoteConnectionsActivator.getImageDescriptor("icons/archiveFile.png"); //$NON-NLS-1$

	protected static final ImageDescriptor INSTALLFILEIMGDESC = RemoteConnectionsActivator.getImageDescriptor("icons/installFile.png"); //$NON-NLS-1$

	private InstallPackages packages;

	private List<PackageType> packageList;

	private Map<ImageDescriptor, Image> imageCache;

	protected abstract IServerData getServerData();

	public List<String> getSDKFamilyNames(IRunnableContext runnableContext) {

		if (packages == null)

			packages = new InstallPackages(getServerData(), runnableContext);

		Set<String> sdkFamilyNames = new HashSet<String>();

		packageList = packages.getAvailablePackageList();

		if (packageList == null)

			return Collections.EMPTY_LIST;

		for (PackageType packageType : packageList) {

			String sdkFamily = packageType.getSdkFamily();

			sdkFamilyNames.add(sdkFamily);

		}

		List<String> sdkFamilyNameList = new ArrayList<String>(sdkFamilyNames);

		Collections.sort(sdkFamilyNameList);

		return sdkFamilyNameList;

	}

	public List<Version> getVersions(String familyName) {

		Set<Version> versions = new HashSet<Version>();

		for (PackageType packageType : packageList) {

			if (packageType.getSdkFamily().equals(familyName)) {

				try {

					versions.add(new Version(packageType.getSdkVersion()));

				}

				catch (IllegalArgumentException e) {

					RemoteConnectionsActivator.logError(e);

				}

			}

		}

		List<Version> versionList = new ArrayList<Version>(versions);

		Collections.sort(versionList);

		return versionList;

	}

	public List<IRemoteAgentInstaller> getRemoteAgentInstallers(String familyName, Version version) {

		Set<IRemoteAgentInstaller> installers = new HashSet<IRemoteAgentInstaller>();

		if (packageList == null) {

			getSDKFamilyNames(null);

		}

		for (PackageType packageType : packageList) {

			if (packageType.getSdkFamily().equals(familyName)) {

				try {

					if (version.equals(new Version(packageType.getSdkVersion()))) {

						installers.add(new PackageTypeInstaller(packages, packageType));

					}

				}

				catch (IllegalArgumentException e) {

					RemoteConnectionsActivator.logError(e);

				}

			}

		}

		List<IRemoteAgentInstaller> installerList = new ArrayList<IRemoteAgentInstaller>(installers);

		Collections.sort(installerList, new Comparator<IRemoteAgentInstaller>() {

			public int compare(IRemoteAgentInstaller o1, IRemoteAgentInstaller o2) {

				return o1.getLabel().compareToIgnoreCase(o2.getLabel());

			}

		});

		return installerList;

	}

		if (imageCache == null)

			imageCache = new HashMap<ImageDescriptor, Image>();

		Image image = imageCache.get(desc);

		if (image == null) {

			image = desc.createImage();

			imageCache.put(desc, image);

		}

		return image;

	}

		if (imageCache != null) {

			for (Image image : imageCache.values()) {

				image.dispose();

			}

			imageCache.clear();

			imageCache = null;

		}

		packages = null;

	}

}