package net.hoopajoo.android;

import java.io.BufferedReader;
import java.io.InputStreamReader;

import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemClock;
import android.util.Log;
import android.view.IWindowManager;
import android.view.KeyEvent;
import android.os.IPowerManager;
import android.content.Context;

/*
 * Inject events as root in to the android framework, accepts commands on stdin,
 * 
 * This gives finer access control to keydown/up and also to put the device to sleep
 * 
 * Other things that are blocked from normal apps that have an interface could be added here
 * like pointer control
 */

public class RemoteContext {
    private boolean debug = false;
    private final String LOG = "RootContext";
    
    public static void main( String[] args ) {
        (new RemoteContext()).run( args );
    }

    private void run( String[] args ) {
        if( args.length > 0 ) {
            debug = true;
            d( "Debugging enabled" );
        }
        
        BufferedReader input = new BufferedReader(
                new InputStreamReader( System.in ),
                2 * 1024 );
        
        String cmd;
        try {
            while( true ) {
                cmd = input.readLine();
        
                d( "Read: " + cmd );
                
                String[] parts = cmd.split(  " " );

                if( debug ) {
                    for( String s : parts ) {
                        d( "Part: " + s );                    
                    }
                }
                
                boolean processed = false;
                if( parts.length > 0 ) {
                    if( parts[ 0 ].startsWith( "key") ) {
                        int code = Integer.parseInt( parts[ 1 ] );
                        if( parts[ 0 ].equals( "keycode" ) ) {
                            // key down, up
                            d( "Sending keycode: " + code );
                            sendKeyCode( code, KeyEvent.ACTION_DOWN );
                            sendKeyCode( code, KeyEvent.ACTION_UP );
                            processed = true;
                        }else if( parts[ 0 ].equals( "keycodedown" ) ) {
                            d( "Sending keycode DOWN: " + code );
                            sendKeyCode( code, KeyEvent.ACTION_DOWN );
                            processed = true;
                        }else if( parts[ 0 ].equals( "keycodeup" ) ) {
                            d( "Sending keycode UP: " + code );
                            sendKeyCode( code, KeyEvent.ACTION_UP );
                            processed = true;
                        }
                    }
                    
                    if( parts[ 0 ].equals( "sleep" ) ) {
                        d( "Going to sleep" );
                        goToSleep();
                        processed = true;
                    }
                    
                    if( parts[ 0 ].equals( "null" ) ) {
                        d( "null command" );
                        processed = true;
                    }
                    
                    if( parts[ 0 ].equals( "system" ) ) {
                        Runtime r = Runtime.getRuntime();
                        String exec = cmd.substring( "system ".length() );
                        d( "Executing shell command: '" + exec + "'" );
                        r.exec( exec );
                        processed = true;
                    }
                }
                
                if( ! processed ) {
                    Log.e( LOG, "Failed to process input: " + cmd );
                    d( "Failed to process input: " + cmd );
                }
            }
        }catch( Exception e ) {
            Log.i( LOG, e.toString() );
        }
        
        d( "Finished" );
    }
    
    private void d( String s ) {
        if( debug ) {
            //System.out.println( s );
            Log.d( LOG, s );
        }
    }

    private void sendKeyCode( int code, int action ) {
        long now = SystemClock.uptimeMillis();
        KeyEvent k = new KeyEvent(now, now, action, code, 0);
        
        try {
            ( IWindowManager.Stub
                .asInterface( ServiceManager.getService( Context.WINDOW_SERVICE) ) )
                .injectKeyEvent( k , true );
        } catch (RemoteException e) {
            Log.i( LOG, e.toString() );
        }
    }
    
    private void goToSleep() {
        try {
            ( IPowerManager.Stub
                .asInterface( ServiceManager.getService( Context.POWER_SERVICE ) ) )
                .goToSleep( SystemClock.uptimeMillis() );
        } catch (RemoteException e) {
            Log.i( LOG, e.toString() );
        }
    }
}