/* $Id$ */
/*
 * Copyright (C) 2013 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.pjsua2.app;

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.app.Activity;

import org.pjsip.pjsua2.*;

class VideoPreviewHandler implements SurfaceHolder.Callback
{   
    public boolean videoPreviewActive = false;
        
    public void updateVideoPreview(SurfaceHolder holder) 
    {
	if (MainActivity.currentCall != null &&
	    MainActivity.currentCall.vidWin != null &&
	    MainActivity.currentCall.vidPrev != null)
	{	
	    if (videoPreviewActive) {
		VideoWindowHandle vidWH = new VideoWindowHandle();
		vidWH.getHandle().setWindow(holder.getSurface());
		VideoPreviewOpParam vidPrevParam = new VideoPreviewOpParam();
		vidPrevParam.setWindow(vidWH);		
		try {
		    MainActivity.currentCall.vidPrev.start(vidPrevParam);
		} catch (Exception e) {
		    System.out.println(e);
		}
	    } else {
		try {
		    MainActivity.currentCall.vidPrev.stop();
		} catch (Exception e) {
		    System.out.println(e);
		}	
	    }
	}
    }    
    
    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h)
    {
	updateVideoPreview(holder);
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) 
    {
	
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) 
    {
	try {
	    MainActivity.currentCall.vidPrev.stop();
	} catch (Exception e) {
	    System.out.println(e);
	}
    }    
}

public class CallActivity extends Activity
			  implements Handler.Callback, SurfaceHolder.Callback
{

    public static Handler handler_;
    private static VideoPreviewHandler previewHandler = 
	    					      new VideoPreviewHandler();

    private final Handler handler = new Handler(this);
    private static CallInfo lastCallInfo;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.activity_call);

	SurfaceView surfaceInVideo = (SurfaceView)
				  findViewById(R.id.surfaceIncomingVideo);
	SurfaceView surfacePreview = (SurfaceView)
		  		  findViewById(R.id.surfacePreviewCapture);	
	Button buttonShowPreview = (Button) 
		  		  findViewById(R.id.buttonShowPreview);	
	
	if (MainActivity.currentCall == null ||
	    MainActivity.currentCall.vidWin == null)
	{
	    surfaceInVideo.setVisibility(View.GONE);	    
	    buttonShowPreview.setVisibility(View.GONE);
	}
	setupVideoPreview(surfacePreview, buttonShowPreview);
	surfaceInVideo.getHolder().addCallback(this);
	surfacePreview.getHolder().addCallback(previewHandler);

	handler_ = handler;
	if (MainActivity.currentCall != null) {
	    try {
		lastCallInfo = MainActivity.currentCall.getInfo();
		updateCallState(lastCallInfo);
	    } catch (Exception e) {
		System.out.println(e);
	    }
	} else {
	    updateCallState(lastCallInfo);
	}
    }

    @Override
    protected void onDestroy()
    {
	super.onDestroy();
	handler_ = null;
    }
    
    private void updateVideoWindow(boolean show)
    { 
	if (MainActivity.currentCall != null &&
	    MainActivity.currentCall.vidWin != null &&
	    MainActivity.currentCall.vidPrev != null)
	{
	    SurfaceView surfaceInVideo = (SurfaceView) 
		       		  findViewById(R.id.surfaceIncomingVideo);
	    
	    VideoWindowHandle vidWH = new VideoWindowHandle();	    
	    if (show) {
		vidWH.getHandle().setWindow(
				       surfaceInVideo.getHolder().getSurface());
	    } else {
		vidWH.getHandle().setWindow(null);
	    }
	    try {
		MainActivity.currentCall.vidWin.setWindow(vidWH);
	    } catch (Exception e) {
		System.out.println(e);
	    }	    
	}
    }
     
    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h)
    {
	updateVideoWindow(true);
    }

    public void surfaceCreated(SurfaceHolder holder)
    {
    }

    public void surfaceDestroyed(SurfaceHolder holder)
    {
	updateVideoWindow(false);
    }

    public void acceptCall(View view)
    {
	CallOpParam prm = new CallOpParam();
	prm.setStatusCode(pjsip_status_code.PJSIP_SC_OK);
	try {
	    MainActivity.currentCall.answer(prm);
	} catch (Exception e) {
	    System.out.println(e);
	}

	view.setVisibility(View.GONE);
    }

    public void hangupCall(View view)
    {
	handler_ = null;
	finish();

	if (MainActivity.currentCall != null) {
	    CallOpParam prm = new CallOpParam();
	    prm.setStatusCode(pjsip_status_code.PJSIP_SC_DECLINE);
	    try {
		MainActivity.currentCall.hangup(prm);
	    } catch (Exception e) {
		System.out.println(e);
	    }
	}
    }
    
    public void setupVideoPreview(SurfaceView surfacePreview, 
	    			  Button buttonShowPreview)
    {
	surfacePreview.setVisibility(previewHandler.videoPreviewActive?
		     		     View.VISIBLE:View.GONE);
	
	buttonShowPreview.setText(previewHandler.videoPreviewActive?
		  		  getString(R.string.hide_preview):
		  		  getString(R.string.show_preview));		
    }
    
    public void showPreview(View view)
    {
	SurfaceView surfacePreview = (SurfaceView)
		  	          findViewById(R.id.surfacePreviewCapture);	

	Button buttonShowPreview = (Button) 
		  		  findViewById(R.id.buttonShowPreview);
	
	
	previewHandler.videoPreviewActive = !previewHandler.videoPreviewActive;
	
	setupVideoPreview(surfacePreview, buttonShowPreview);
	
	previewHandler.updateVideoPreview(surfacePreview.getHolder());
    }

    private void setupVideoSurface()
    {
	SurfaceView surfaceInVideo = (SurfaceView)
				  findViewById(R.id.surfaceIncomingVideo);
	SurfaceView surfacePreview = (SurfaceView)
		  		  findViewById(R.id.surfacePreviewCapture);
	Button buttonShowPreview = (Button)
		  		  findViewById(R.id.buttonShowPreview);	
	surfaceInVideo.setVisibility(View.VISIBLE);
	buttonShowPreview.setVisibility(View.VISIBLE);
	surfacePreview.setVisibility(View.GONE);	
    }

    @Override
    public boolean handleMessage(Message m)
    {
	if (m.what == MainActivity.MSG_TYPE.CALL_STATE) {

	    lastCallInfo = (CallInfo) m.obj;
	    updateCallState(lastCallInfo);

	} else if (m.what == MainActivity.MSG_TYPE.CALL_MEDIA_STATE) {

	    if (MainActivity.currentCall.vidWin != null) {
		/* If there's incoming video, display it. */
		setupVideoSurface();
	    }

	} else {

	    /* Message not handled */
	    return false;

	}

	return true;
    }

    private void updateCallState(CallInfo ci) {
	TextView tvPeer  = (TextView) findViewById(R.id.textViewPeer);
	TextView tvState = (TextView) findViewById(R.id.textViewCallState);
	Button buttonHangup = (Button) findViewById(R.id.buttonHangup);
	Button buttonAccept = (Button) findViewById(R.id.buttonAccept);
	String call_state = "";

	if (ci.getRole() == pjsip_role_e.PJSIP_ROLE_UAC) {
	    buttonAccept.setVisibility(View.GONE);
	}

	if (ci.getState().swigValue() <
	    pjsip_inv_state.PJSIP_INV_STATE_CONFIRMED.swigValue())
	{
	    if (ci.getRole() == pjsip_role_e.PJSIP_ROLE_UAS) {
		call_state = "Incoming call..";
		/* Default button texts are already 'Accept' & 'Reject' */
	    } else {
		buttonHangup.setText("Cancel");
		call_state = ci.getStateText();
	    }
	}
	else if (ci.getState().swigValue() >=
		 pjsip_inv_state.PJSIP_INV_STATE_CONFIRMED.swigValue())
	{
	    buttonAccept.setVisibility(View.GONE);
	    call_state = ci.getStateText();
	    if (ci.getState() == pjsip_inv_state.PJSIP_INV_STATE_CONFIRMED) {
		buttonHangup.setText("Hangup");
	    } else if (ci.getState() ==
		       pjsip_inv_state.PJSIP_INV_STATE_DISCONNECTED)
	    {
		buttonHangup.setText("OK");
		call_state = "Call disconnected: " + ci.getLastReason();
	    }
	}

	tvPeer.setText(ci.getRemoteUri());
	tvState.setText(call_state);
    }
}