/*
 * Created on 13-Mar-2004
 * Created by James Yeh
 * Copyright (C) 2004, 2005, 2006 Aelitis, All Rights Reserved.
 *
 * 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 2
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 * 
 * AELITIS, SAS au capital de 46,603.30 euros
 * 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
 *
 */

package org.gudy.azureus2.platform.macosx;

import org.gudy.azureus2.core3.logging.*;
import org.gudy.azureus2.core3.util.AEMonitor;
import org.gudy.azureus2.core3.util.Debug;
import org.gudy.azureus2.core3.util.SystemProperties;
import org.gudy.azureus2.platform.PlatformManager;
import org.gudy.azureus2.platform.PlatformManagerCapabilities;
import org.gudy.azureus2.platform.PlatformManagerListener;
import org.gudy.azureus2.platform.macosx.access.jnilib.OSXAccess;

import org.gudy.azureus2.plugins.platform.PlatformManagerException;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.MessageFormat;
import java.util.HashSet;


/**
 * Performs platform-specific operations with Mac OS X
 *
 * @author James Yeh
 * @version 1.0 Initial Version
 * @see PlatformManager
 */
public class PlatformManagerImpl implements PlatformManager
{
    private static final LogIDs LOGID = LogIDs.CORE;

    protected static PlatformManagerImpl singleton;
    protected static AEMonitor class_mon = new AEMonitor("PlatformManager");

    private static final String USERDATA_PATH = new File(System.getProperty("user.home") + "/Library/Application Support/").getPath();

    //T: PlatformManagerCapabilities
    private final HashSet capabilitySet = new HashSet();

    /**
     * Gets the platform manager singleton, which was already initialized
     */
    public static PlatformManagerImpl getSingleton()
    {
        return singleton;
    }

    /**
     * Tries to enable cocoa-java access and instantiates the singleton
     */
    static
    {
        initializeSingleton();
    }

    /**
     * Instantiates the singleton
     */
    private static void initializeSingleton()
    {
        try
        {
            class_mon.enter();
            singleton = new PlatformManagerImpl();
        }
        catch (Throwable e)
        {
        	Logger.log(new LogEvent(LOGID, "Failed to initialize platform manager"
					+ " for Mac OS X", e));
        }
        finally
        {
            class_mon.exit();
        }
    }

    /**
     * Creates a new PlatformManager and initializes its capabilities
     */
    public PlatformManagerImpl()
    {
        capabilitySet.add(PlatformManagerCapabilities.RecoverableFileDelete);
        capabilitySet.add(PlatformManagerCapabilities.ShowFileInBrowser);
        capabilitySet.add(PlatformManagerCapabilities.ShowPathInCommandLine);
        capabilitySet.add(PlatformManagerCapabilities.CreateCommandLineProcess);
        capabilitySet.add(PlatformManagerCapabilities.GetUserDataDirectory);
        capabilitySet.add(PlatformManagerCapabilities.UseNativeScripting);
        capabilitySet.add(PlatformManagerCapabilities.PlaySystemAlert);
        
        if (OSXAccess.isLoaded()) {
	        capabilitySet.add(PlatformManagerCapabilities.GetVersion);
        }
    }

    /**
     * {@inheritDoc}
     */
    public int getPlatformType()
    {
        return PT_MACOSX;
    }

    /**
     * {@inheritDoc}
     */
    public String getVersion() throws PlatformManagerException
    {
    	if (!OSXAccess.isLoaded()) {
        throw new PlatformManagerException("Unsupported capability called on platform manager");
    	}
    	
    	return OSXAccess.getVersion();
    }

    /**
     * {@inheritDoc}
     * @see org.gudy.azureus2.core3.util.SystemProperties#getUserPath()
     */
    public String getUserDataDirectory() throws PlatformManagerException
    {
        return USERDATA_PATH;
    }

	public File
	getLocation(
		long	location_id )
	
		throws PlatformManagerException
	{
		if ( location_id == LOC_USER_DATA ){
			
			return( new File( USERDATA_PATH ));
		}
		
		return( null );
	}
    /**
     * Not implemented; returns True
     */
    public boolean isApplicationRegistered() throws PlatformManagerException
    {
        return true;
    }

    
	public String
	getApplicationCommandLine()
		throws PlatformManagerException
	{
		try{	    
			String	bundle_path = System.getProperty("user.dir") +SystemProperties.SEP+ SystemProperties.getApplicationName() + ".app";

			File osx_app_bundle = new File( bundle_path ).getAbsoluteFile();
			
			if( !osx_app_bundle.exists() ) {
				String msg = "OSX app bundle not found: [" +osx_app_bundle.toString()+ "]";
				System.out.println( msg );
				if (Logger.isEnabled())
					Logger.log(new LogEvent(LOGID, msg));		
				throw new PlatformManagerException( msg );
			}
			
			return "open -a \"" +osx_app_bundle.toString()+ "\"";
			//return osx_app_bundle.toString() +"/Contents/MacOS/JavaApplicationStub";
			
		}
		catch( Throwable t ){	
			t.printStackTrace();
			return null;
		}
	}
	
	
	public boolean
	isAdditionalFileTypeRegistered(
		String		name,				// e.g. "BitTorrent"
		String		type )				// e.g. ".torrent"
	
		throws PlatformManagerException
	{
	    throw new PlatformManagerException("Unsupported capability called on platform manager");
	}
	
	public void
	unregisterAdditionalFileType(
		String		name,				// e.g. "BitTorrent"
		String		type )				// e.g. ".torrent"
		
		throws PlatformManagerException
	{
		throw new PlatformManagerException("Unsupported capability called on platform manager");
	}
	
	public void
	registerAdditionalFileType(
		String		name,				// e.g. "BitTorrent"
		String		description,		// e.g. "BitTorrent File"
		String		type,				// e.g. ".torrent"
		String		content_type )		// e.g. "application/x-bittorrent"
	
		throws PlatformManagerException
	{
	   throw new PlatformManagerException("Unsupported capability called on platform manager");
	}
	
    /**
     * Not implemented; does nothing
     */
    public void registerApplication() throws PlatformManagerException
    {
        // handled by LaunchServices and/0r user interaction
    }

    /**
     * {@inheritDoc}
     */
    public void createProcess(String cmd, boolean inheritsHandles) throws PlatformManagerException
    {
        try
        {
            performRuntimeExec(cmd.split(" "));
        }
        catch (Throwable e)
        {
            throw new PlatformManagerException("Failed to create process", e);
        }
    }

    /**
     * {@inheritDoc}
     */
    public void performRecoverableFileDelete(String path) throws PlatformManagerException
    {
        File file = new File(path);
        if(!file.exists())
        {
	        	if (Logger.isEnabled())
							Logger.log(new LogEvent(LOGID, LogEvent.LT_WARNING, "Cannot find "
									+ file.getName()));
            return;
        }

        boolean useOSA = !NativeInvocationBridge.sharedInstance().isEnabled() || !NativeInvocationBridge.sharedInstance().performRecoverableFileDelete(file);

        if(useOSA)
        {
            try
            {
                StringBuffer sb = new StringBuffer();
                sb.append("tell application \"");
                sb.append("Finder");
                sb.append("\" to move (posix file \"");
                sb.append(path);
                sb.append("\" as alias) to the trash");

                performOSAScript(sb);
            }
            catch (Throwable e)
            {
                throw new PlatformManagerException("Failed to move file", e);
            }
        }
    }

    /**
     * {@inheritDoc}
     */
    public boolean hasCapability(PlatformManagerCapabilities capability)
    {
        return capabilitySet.contains(capability);
    }

    /**
     * {@inheritDoc}
     */
    public void dispose()
    {
        NativeInvocationBridge.sharedInstance().dispose();
    }

    /**
     * {@inheritDoc}
     */
    public void setTCPTOSEnabled(boolean enabled) throws PlatformManagerException
    {
        throw new PlatformManagerException("Unsupported capability called on platform manager");
    }

	public void
    copyFilePermissions(
		String	from_file_name,
		String	to_file_name )
	
		throws PlatformManagerException
	{
	    throw new PlatformManagerException("Unsupported capability called on platform manager");		
	}
	
    /**
     * {@inheritDoc}
     */
    public void showFile(String path) throws PlatformManagerException
    {
        File file = new File(path);
        if(!file.exists())
        {
        	if (Logger.isEnabled())
        		Logger.log(new LogEvent(LOGID, LogEvent.LT_WARNING, "Cannot find "
        				+ file.getName()));
            throw new PlatformManagerException("File not found");
        }

        showInFinder(file);
    }

    // Public utility methods not shared across the interface

    /**
     * Plays the system alert (the jingle is specified by the user in System Preferences)
     */
    public void playSystemAlert()
    {
        try
        {
            performRuntimeExec(new String[]{"beep"});
        }
        catch (IOException e)
        {
        	if (Logger.isEnabled())
        		Logger.log(new LogEvent(LOGID, LogEvent.LT_WARNING,
						"Cannot play system alert"));
        	Logger.log(new LogEvent(LOGID, "", e));
        }
    }

    /**
     * <p>Shows the given file or directory in Finder</p>
     * @param path Absolute path to the file or directory
     */
    public void showInFinder(File path)
    {
        boolean useOSA = !NativeInvocationBridge.sharedInstance().isEnabled() || !NativeInvocationBridge.sharedInstance().showInFinder(path);

        if(useOSA)
        {
            StringBuffer sb = new StringBuffer();
            sb.append("tell application \"");
            sb.append(getFileBrowserName());
            sb.append("\" to reveal (posix file \"");
            sb.append(path);
            sb.append("\" as alias)");

            try
            {
                performOSAScript(sb);
            }
            catch (IOException e)
            {
                Logger.log(new LogAlert(LogAlert.UNREPEATABLE, LogAlert.AT_ERROR, e
						.getMessage()));
            }
        }
    }

    /**
     * <p>Shows the given file or directory in Terminal by executing cd /absolute/path/to</p>
     * @param path Absolute path to the file or directory
     */
    public void showInTerminal(String path)
    {
        showInTerminal(new File(path));
    }

    /**
     * <p>Shows the given file or directory in Terminal by executing cd /absolute/path/to</p>
     * @param path Absolute path to the file or directory
     */
    public void showInTerminal(File path)
    {
        if (path.isFile())
        {
            path = path.getParentFile();
        }

        if (path != null && path.isDirectory())
        {
            StringBuffer sb = new StringBuffer();
            sb.append("tell application \"");
            sb.append("Terminal");
            sb.append("\" to do script \"cd ");
            sb.append(path.getAbsolutePath().replaceAll(" ", "\\ "));
            sb.append("\"");

            try
            {
                performOSAScript(sb);
            }
            catch (IOException e)
            {
                Logger.log(new LogAlert(LogAlert.UNREPEATABLE, LogAlert.AT_ERROR, e
						.getMessage()));
            }
        }
        else
        {
        	if (Logger.isEnabled())
        		Logger.log(new LogEvent(LOGID, LogEvent.LT_WARNING, "Cannot find "
        				+ path.getName()));
        }
    }

    // Internal utility methods

    /**
     * Compiles a new AppleScript instance and runs it
     * @param cmd AppleScript command to execute; do not surround command with extra quotation marks
     * @return Output of the script
     * @throws IOException If the script failed to execute
     */
    protected static String performOSAScript(CharSequence cmd) throws IOException
    {
        return performOSAScript(new CharSequence[]{cmd});
    }

    /**
     * Compiles a new AppleScript instance and runs it
     * @param cmds AppleScript Sequence of commands to execute; do not surround command with extra quotation marks
     * @return Output of the script
     * @throws IOException If the script failed to execute
     */
    protected static String performOSAScript(CharSequence[] cmds) throws IOException
    {
        long start = System.currentTimeMillis();
        Debug.outNoStack("Executing OSAScript: ");
        for (int i = 0; i < cmds.length; i++)
        {
            Debug.outNoStack("\t" + cmds[i]);
        }

        String[] cmdargs = new String[2 * cmds.length + 1];
        cmdargs[0] = "osascript";
        for (int i = 0; i < cmds.length; i++)
        {
            cmdargs[i * 2 + 1] = "-e";
            cmdargs[i * 2 + 2] = String.valueOf(cmds[i]);
        }

        Process osaProcess = performRuntimeExec(cmdargs);
        BufferedReader reader = new BufferedReader(new InputStreamReader(osaProcess.getInputStream()));
        String line = reader.readLine();
        reader.close();
        Debug.outNoStack("OSAScript Output: " + line);

        reader = new BufferedReader(new InputStreamReader(osaProcess.getErrorStream()));
        String errorMsg = reader.readLine();
        reader.close();

        Debug.outNoStack("OSAScript Error (if any): " + errorMsg);

        Debug.outNoStack(MessageFormat.format("OSAScript execution ended ({0}ms)", new Object[]{String.valueOf(System.currentTimeMillis() - start)}));

        if (errorMsg != null)
        {
            throw new IOException(errorMsg);
        }

        return line;
    }

    /**
     * Compiles a new AppleScript instance and runs it
     * @param script AppleScript file (.scpt) to execute
     * @return Output of the script
     * @throws IOException If the script failed to execute
     */
    protected static String performOSAScript(File script) throws IOException
    {
        long start = System.currentTimeMillis();
        Debug.outNoStack("Executing OSAScript from file: " + script.getPath());

        Process osaProcess = performRuntimeExec(new String[]{"osascript", script.getPath()});
        BufferedReader reader = new BufferedReader(new InputStreamReader(osaProcess.getInputStream()));
        String line = reader.readLine();
        reader.close();
        Debug.outNoStack("OSAScript Output: " + line);

        reader = new BufferedReader(new InputStreamReader(osaProcess.getErrorStream()));
        String errorMsg = reader.readLine();
        reader.close();

        Debug.outNoStack("OSAScript Error (if any): " + errorMsg);

        Debug.outNoStack(MessageFormat.format("OSAScript execution ended ({0}ms)", new Object[]{String.valueOf(System.currentTimeMillis() - start)}));

        if (errorMsg != null)
        {
            throw new IOException(errorMsg);
        }

        return line;
    }

    /**
     * Compiles a new AppleScript instance to the specified location
     * @param cmd         Command to compile; do not surround command with extra quotation marks
     * @param destination Destination location of the AppleScript file
     * @return True if compiled successfully
     */
    protected static boolean compileOSAScript(CharSequence cmd, File destination)
    {
        return compileOSAScript(new CharSequence[]{cmd}, destination);
    }

    /**
     * Compiles a new AppleScript instance to the specified location
     * @param cmds Sequence of commands to compile; do not surround command with extra quotation marks
     * @param destination Destination location of the AppleScript file
     * @return True if compiled successfully
     */
    protected static boolean compileOSAScript(CharSequence[] cmds, File destination)
    {
        long start = System.currentTimeMillis();
        Debug.outNoStack("Compiling OSAScript: " + destination.getPath());
        for (int i = 0; i < cmds.length; i++)
        {
            Debug.outNoStack("\t" + cmds[i]);
        }

        String[] cmdargs = new String[2 * cmds.length + 3];
        cmdargs[0] = "osacompile";
        for (int i = 0; i < cmds.length; i++)
        {
            cmdargs[i * 2 + 1] = "-e";
            cmdargs[i * 2 + 2] = String.valueOf(cmds[i]);
        }

        cmdargs[cmdargs.length - 2] = "-o";
        cmdargs[cmdargs.length - 1] = destination.getPath();

        String errorMsg;
        try
        {
            Process osaProcess = performRuntimeExec(cmdargs);

            BufferedReader reader = new BufferedReader(new InputStreamReader(osaProcess.getErrorStream()));
            errorMsg = reader.readLine();
            reader.close();
        }
        catch (IOException e)
        {
            Debug.outNoStack("OSACompile Execution Failed: " + e.getMessage());
            Debug.printStackTrace(e);
            return false;
        }

        Debug.outNoStack("OSACompile Error (if any): " + errorMsg);

        Debug.outNoStack(MessageFormat.format("OSACompile execution ended ({0}ms)", new Object[]{String.valueOf(System.currentTimeMillis() - start)}));

        return (errorMsg == null);
    }

    /**
     * @see Runtime#exec(String[])
     */
    protected static Process performRuntimeExec(String[] cmdargs) throws IOException
    {
        try
        {
            return Runtime.getRuntime().exec(cmdargs);
        }
        catch (IOException e)
        {
            Logger.log(new LogAlert(LogAlert.UNREPEATABLE, e.getMessage(), e));
            throw e;
        }
    }

    /**
     * <p>Gets the preferred file browser name</p>
     * <p>Currently supported browsers are Path Finder and Finder. If Path Finder is currently running
     * (not just installed), then "Path Finder is returned; else, "Finder" is returned.</p>
     * @return "Path Finder" if it is currently running; else "Finder"
     */
    private static String getFileBrowserName()
    {
        try
        {
            // slowwwwwwww
            if ("true".equalsIgnoreCase(performOSAScript("tell application \"System Events\" to exists process \"Path Finder\"")))
            {
                Debug.outNoStack("Path Finder is running");

                return "Path Finder";
            }
            else
            {
                return "Finder";
            }
        }
        catch (IOException e)
        {
            Debug.printStackTrace(e);
            Logger.log(new LogEvent(LOGID, e.getMessage(), e));

            return "Finder";
        }
    }
    
	public boolean
	testNativeAvailability(
		String	name )
	
		throws PlatformManagerException
	{
	    throw new PlatformManagerException("Unsupported capability called on platform manager");		
	}
    
    public void
    addListener(
    	PlatformManagerListener		listener )
    {
    }
    
    public void
    removeListener(
    	PlatformManagerListener		listener )
    {
    }
}