/* $Id: MainActivity.java $ */
/*
 * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
 *
 * 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
 */

package org.pjsip.pjsua;

import java.lang.ref.WeakReference;

import android.app.Activity;
import android.content.pm.ApplicationInfo;
import android.os.Bundle;
import android.util.Log;
import android.os.Handler;
import android.os.Message;
import android.widget.TextView;

class CONST {
	public static final String LIB_FILENAME = "pjsua";
	public static final String TAG = "pjsua";
	public static final Boolean AUTOKILL_ON_FINISH = true;
	public enum MSG_TYPE {
		STR_DEBUG,
		STR_INFO,
		STR_ERROR,
		CLI_STOP,
		CLI_RESTART,
		QUIT
	};	
}

class LOG {
	public static void DEBUG(Handler h, String str) {
		Message msg = Message.obtain(h, CONST.MSG_TYPE.STR_DEBUG.ordinal(), 
									 str);
		msg.sendToTarget();
	}	
	public static void INFO(Handler h, String str) {
		Message msg = Message.obtain(h, CONST.MSG_TYPE.STR_INFO.ordinal(), 
									 str);
		msg.sendToTarget();
	}
	public static void ERROR(Handler h, String str) {
		Message msg = Message.obtain(h, CONST.MSG_TYPE.STR_ERROR.ordinal(), 
									 str);
		msg.sendToTarget();
	}
}

public class MainActivity extends Activity {
	private MyHandler ui_handler = new MyHandler(this);
	private static MyCallback callback;
	
	private static class MyHandler extends Handler {
		private final WeakReference<MainActivity> mTarget;
		
		public MyHandler(MainActivity target) {
			mTarget = new WeakReference<MainActivity>(target); 
		}
		
		@Override
		public void handleMessage(Message m) {
			MainActivity target = mTarget.get();
			if (target == null)
				return;
			
			if (m.what == CONST.MSG_TYPE.STR_DEBUG.ordinal()) {
				Log.d(CONST.TAG, (String)m.obj);	
			} else if (m.what == CONST.MSG_TYPE.STR_INFO.ordinal()) {
				target.updateStatus((String)m.obj);
				Log.i(CONST.TAG, (String)m.obj);				
			} else if (m.what == CONST.MSG_TYPE.STR_ERROR.ordinal()) {
				target.updateStatus((String)m.obj);
				Log.e(CONST.TAG, (String)m.obj);
			} else if (m.what == CONST.MSG_TYPE.CLI_STOP.ordinal()) {
				pjsua.pjsuaDestroy();
				LOG.INFO(this, "Telnet Unavailable");
			} else if (m.what == CONST.MSG_TYPE.CLI_RESTART.ordinal()) {
				int status = pjsua.pjsuaRestart();
				if (status != 0) {
					LOG.INFO(this, "Failed restarting telnet");
				}
			} else if (m.what == CONST.MSG_TYPE.QUIT.ordinal()) {
				target.finish();
				System.gc();
				android.os.Process.killProcess(android.os.Process.myPid());
			}
		}
    }
	
	/** Callback object **/
	private static class MyCallback extends PjsuaAppCallback {
		private WeakReference<Handler> ui_handler;
		
		public MyCallback(Handler in_ui_handler) {
			set_ui_handler(in_ui_handler);			
		}
		
		public void set_ui_handler(Handler in_ui_handler) {
			ui_handler = new WeakReference<Handler>(in_ui_handler);
		}		
		
		@Override
	    public void onStarted(String msg) {
			Handler ui = ui_handler.get();
			LOG.INFO(ui, msg);			
		}
		
		@Override
	    public void onStopped(int restart) {
			Handler ui = ui_handler.get();
			/** Use timer to stopped/restart **/
			if (restart != 0) {
				LOG.INFO(ui, "Telnet Restarting");
				Message msg = Message.obtain(ui, 
										  CONST.MSG_TYPE.CLI_RESTART.ordinal());
				ui.sendMessageDelayed(msg, 100);
			} else {
				LOG.INFO(ui, "Telnet Stopping");
				Message msg = Message.obtain(ui, 
											 CONST.MSG_TYPE.CLI_STOP.ordinal());
				ui.sendMessageDelayed(msg, 100);
			}
		}
	}
	
	private void updateStatus(String output) {
        TextView tStatus = (TextView) findViewById(R.id.textStatus);
        tStatus.setText(output);        
	}
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
    	LOG.DEBUG(ui_handler, "=== Activity::onCreate() ===");
    	super.onCreate(savedInstanceState);
    	
    	init_view();

    	init_lib();
	}

    @Override
    protected void onStart() {
    	LOG.DEBUG(ui_handler, "=== Activity::onStart() ===");
    	super.onStart();
    }
    
    @Override
    protected void onRestart() {
    	LOG.DEBUG(ui_handler, "=== Activity::onRestart() ===");
    	super.onRestart();
    }

    @Override
    protected void onResume() {
    	LOG.DEBUG(ui_handler, "=== Activity::onResume() ===");
    	super.onResume();
    }

    @Override
    protected void onPause() {
    	LOG.DEBUG(ui_handler, "=== Activity::onPause() ===");
    	super.onPause();
    }

    @Override
    protected void onStop() {
    	LOG.DEBUG(ui_handler, "=== Activity::onStop() ===");
    	super.onStop();
    }

    @Override
    protected void onDestroy() {
    	LOG.DEBUG(ui_handler, "=== Activity::onDestroy() ===");
    	super.onDestroy();
    }
    
    @Override
    protected void onSaveInstanceState(Bundle outState) {
		super.onSaveInstanceState(outState);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
		super.onRestoreInstanceState(savedInstanceState);
    }
    
	private void init_view() {
    	setContentView(R.layout.activity_main);
	}
	
	private int init_lib() {        
		LOG.INFO(ui_handler, "Loading module...");
		try {
			System.loadLibrary(CONST.LIB_FILENAME);
		} catch (UnsatisfiedLinkError e) {
			LOG.ERROR(ui_handler, "UnsatisfiedLinkError: " + e.getMessage());
			return -1;
		}
		
		// Wait for GDB to init
		if ((getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0) 
		{
			try {
				Thread.sleep(5000);
	        } catch (InterruptedException e) {
	        	LOG.ERROR(ui_handler, "InterruptedException: " + 
	        			  e.getMessage());
	        }
		}
		
		// Set callback object
		if (callback == null)
			callback = new MyCallback(ui_handler);
		
		pjsua.setCallbackObject(callback);

		LOG.INFO(ui_handler, "Starting module..");

		int rc = pjsua.pjsuaStart();
        
		if (rc != 0) {
			LOG.INFO(ui_handler, "Failed starting telnet");
		}
		
		return 0;
	}
}