package in.celest.xash3d;

import javax.microedition.khronos.egl.EGL10;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.egl.EGLContext;
import javax.microedition.khronos.opengles.GL10;
import javax.microedition.khronos.egl.*;

import android.app.*;
import android.content.*;
import android.view.*;
import android.os.*;
import android.util.Log;
import android.graphics.*;
import android.text.method.*;
import android.text.*;
import android.media.*;
import android.hardware.*;
import android.content.*;

import java.lang.*;

/**
 SDL Activity
 */
public class XashActivity extends Activity {

    // Main components
    protected static XashActivity mSingleton;
    private static EngineSurface mSurface;
    private static String mArgv;

    // Audio
    private static Thread mAudioThread;
    private static AudioTrack mAudioTrack;
    // Load the .so
    static {
        System.loadLibrary("xash");
    }

    // Setup
    protected void onCreate(Bundle savedInstanceState) {
        //Log.v("SDL", "onCreate()");
        super.onCreate(savedInstanceState);

        // So we can call stuff from static callbacks
        mSingleton = this;
        Intent intent = getIntent();
      //  mArgv = intent.getStringExtra(in.celest.xash3d.LauncherActivity.ARGV);
        // Set up the surface
        mSurface = new EngineSurface(getApplication());
        setContentView(mSurface);
        SurfaceHolder holder = mSurface.getHolder();
        holder.setType(SurfaceHolder.SURFACE_TYPE_GPU);
    }

    // Events
    protected void onPause() {
        //Log.v("SDL", "onPause()");
        super.onPause();
    }

    protected void onResume() {
        //Log.v("SDL", "onResume()");
        super.onResume();
    }

    // Messages from the SDLMain thread
    static int COMMAND_CHANGE_TITLE = 1;

    // Handler for the messages
    Handler commandHandler = new Handler() {
        public void handleMessage(Message msg) {
            if (msg.arg1 == COMMAND_CHANGE_TITLE) {
                setTitle((String)msg.obj);
            }
        }
    };

    // Send a message from the SDLMain thread
    void sendCommand(int command, Object data) {
        Message msg = commandHandler.obtainMessage();
        msg.arg1 = command;
        msg.obj = data;
        commandHandler.sendMessage(msg);
    }
    public static String[] getArguments()
    {


        return mArgv.split(" ");
    }
    // C functions we call
    public static native int nativeInit(Object arguments);
    public static native void nativeQuit();
    public static native void onNativeResize(int x, int y);
    public static native void onNativeKeyDown(int keycode);
    public static native void onNativeKeyUp(int keycode);
    public static native void onNativeTouch(int touchDevId, int pointerFingerId,
                                            int action, float x, 
                                            float y, float p);
    public static native void onNativeAccel(float x, float y, float z);
    public static native void nativeRunAudioThread();


    // Java functions called from C

    public static boolean createGLContext() {
        return mSurface.InitGL();
    }

    public static void swapBuffers() {
        mSurface.SwapBuffers();
    }

    public static void setActivityTitle(String title) {
        // Called from SDLMain() thread and can't directly affect the view
        mSingleton.sendCommand(COMMAND_CHANGE_TITLE, title);
    }

    public static Context getContext() {
        return mSingleton;
    }

    // Audio
    private static Object buf;

    public static Object audioInit(int sampleRate, boolean is16Bit, boolean isStereo, int desiredFrames) {
        int channelConfig = isStereo ? AudioFormat.CHANNEL_CONFIGURATION_STEREO : AudioFormat.CHANNEL_CONFIGURATION_MONO;
        int audioFormat = is16Bit ? AudioFormat.ENCODING_PCM_16BIT : AudioFormat.ENCODING_PCM_8BIT;
        int frameSize = (isStereo ? 2 : 1) * (is16Bit ? 2 : 1);

        Log.v("SDL", "SDL audio: wanted " + (isStereo ? "stereo" : "mono") + " " + (is16Bit ? "16-bit" : "8-bit") + " " + ((float)sampleRate / 1000f) + "kHz, " + desiredFrames + " frames buffer");

        // Let the user pick a larger buffer if they really want -- but ye
        // gods they probably shouldn't, the minimums are horrifyingly high
        // latency already
        desiredFrames = Math.max(desiredFrames, (AudioTrack.getMinBufferSize(sampleRate, channelConfig, audioFormat) + frameSize - 1) / frameSize);

        mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate,
									 channelConfig, audioFormat, desiredFrames * frameSize, AudioTrack.MODE_STREAM);

        audioStartThread();

        Log.v("SDL", "SDL audio: got " + ((mAudioTrack.getChannelCount() >= 2) ? "stereo" : "mono") + " " + ((mAudioTrack.getAudioFormat() == AudioFormat.ENCODING_PCM_16BIT) ? "16-bit" : "8-bit") + " " + ((float)mAudioTrack.getSampleRate() / 1000f) + "kHz, " + desiredFrames + " frames buffer");

        if (is16Bit) {
            buf = new short[desiredFrames * (isStereo ? 2 : 1)];
        } else {
            buf = new byte[desiredFrames * (isStereo ? 2 : 1)]; 
        }
        return buf;
    }

    public static void audioStartThread() {
        mAudioThread = new Thread(new Runnable() {
				public void run() {
					mAudioTrack.play();
					nativeRunAudioThread();
				}
			});

        // I'd take REALTIME if I could get it!
        mAudioThread.setPriority(Thread.MAX_PRIORITY);
        mAudioThread.start();
    }

    public static void audioWriteShortBuffer(short[] buffer) {
        for (int i = 0; i < buffer.length; ) {
            int result = mAudioTrack.write(buffer, i, buffer.length - i);
            if (result > 0) {
                i += result;
            } else if (result == 0) {
                try {
                    Thread.sleep(1);
                } catch(InterruptedException e) {
                    // Nom nom
                }
            } else {
                Log.w("SDL", "SDL audio: error return from write(short)");
                return;
            }
        }
    }

    public static void audioWriteByteBuffer(byte[] buffer) {
        for (int i = 0; i < buffer.length; ) {
            int result = mAudioTrack.write(buffer, i, buffer.length - i);
            if (result > 0) {
                i += result;
            } else if (result == 0) {
                try {
                    Thread.sleep(1);
                } catch(InterruptedException e) {
                    // Nom nom
                }
            } else {
                Log.w("SDL", "SDL audio: error return from write(short)");
                return;
            }
        }
    }

    public static void audioQuit() {
        if (mAudioThread != null) {
            try {
                mAudioThread.join();
            } catch(Exception e) {
                Log.v("SDL", "Problem stopping audio thread: " + e);
            }
            mAudioThread = null;

            //Log.v("SDL", "Finished waiting for audio thread");
        }

        if (mAudioTrack != null) {
            mAudioTrack.stop();
            mAudioTrack = null;
        }
    }
}

/**
 Simple nativeInit() runnable
 */
class XashMain implements Runnable {
    public void run() {
        // Runs SDL_main()
		XashActivity.createGLContext();

        XashActivity.nativeInit(XashActivity.getArguments());

        //Log.v("SDL", "SDL thread terminated");
    }
}


/**
 SDLSurface. This is what we draw on, so we need to know when it's created
 in order to do anything useful. 

 Because of this, that's where we set up the SDL thread
 */
class EngineSurface extends SurfaceView implements SurfaceHolder.Callback, 
View.OnKeyListener, View.OnTouchListener  {

    // This is what SDL runs in. It invokes SDL_main(), eventually
    private Thread mEngThread;    

    // EGL private objects
    private EGLContext  mEGLContext;
    private EGLSurface  mEGLSurface;
    private EGLDisplay  mEGLDisplay;

    // Sensors

    // Startup    
    public EngineSurface(Context context) {
        super(context);
        getHolder().addCallback(this); 

        setFocusable(true);
        setFocusableInTouchMode(true);
        requestFocus();
        setOnKeyListener(this); 
        setOnTouchListener(this);   
    }

    // Called when we have a valid drawing surface
    public void surfaceCreated(SurfaceHolder holder) {
        //Log.v("SDL", "surfaceCreated()");
    }

    // Called when we lose the surface
    public void surfaceDestroyed(SurfaceHolder holder) {
        //Log.v("SDL", "surfaceDestroyed()");

        // Send a quit message to the application
        XashActivity.nativeQuit();

        // Now wait for the SDL thread to quit
        if (mEngThread != null) {
            try {
                mEngThread.join();
            } catch(Exception e) {
                Log.v("SDL", "Problem stopping thread: " + e);
            }
            mEngThread = null;

            //Log.v("SDL", "Finished waiting for SDL thread");
        }
    }

    // Called when the surface is resized
    public void surfaceChanged(SurfaceHolder holder,
                               int format, int width, int height) {
        //Log.v("SDL", "surfaceChanged()");
/*
        int sdlFormat = 0x85151002; // SDL_PIXELFORMAT_RGB565 by default
        switch (format) {
			case PixelFormat.A_8:
				Log.v("SDL", "pixel format A_8");
				break;
			case PixelFormat.LA_88:
				Log.v("SDL", "pixel format LA_88");
				break;
			case PixelFormat.L_8:
				Log.v("SDL", "pixel format L_8");
				break;
			case PixelFormat.RGBA_4444:
				Log.v("SDL", "pixel format RGBA_4444");
				sdlFormat = 0x85421002; // SDL_PIXELFORMAT_RGBA4444
				break;
			case PixelFormat.RGBA_5551:
				Log.v("SDL", "pixel format RGBA_5551");
				sdlFormat = 0x85441002; // SDL_PIXELFORMAT_RGBA5551
				break;
			case PixelFormat.RGBA_8888:
				Log.v("SDL", "pixel format RGBA_8888");
				sdlFormat = 0x86462004; // SDL_PIXELFORMAT_RGBA8888
				break;
			case PixelFormat.RGBX_8888:
				Log.v("SDL", "pixel format RGBX_8888");
				sdlFormat = 0x86262004; // SDL_PIXELFORMAT_RGBX8888
				break;
			case PixelFormat.RGB_332:
				Log.v("SDL", "pixel format RGB_332");
				sdlFormat = 0x84110801; // SDL_PIXELFORMAT_RGB332
				break;
			case PixelFormat.RGB_565:
				Log.v("SDL", "pixel format RGB_565");
				sdlFormat = 0x85151002; // SDL_PIXELFORMAT_RGB565
				break;
			case PixelFormat.RGB_888:
				Log.v("SDL", "pixel format RGB_888");
				// Not sure this is right, maybe SDL_PIXELFORMAT_RGB24 instead?
				sdlFormat = 0x86161804; // SDL_PIXELFORMAT_RGB888
				break;
			default:
				Log.v("SDL", "pixel format unknown " + format);
				break;
        }*/
        
        
        XashActivity.onNativeResize(width, height);
        // Now start up the C app thread
        if (mEngThread == null) {
			
            mEngThread = new Thread(new XashMain(), "EngineThread"); 
            mEngThread.start();       
        }
    }

    // unused
    public void onDraw(Canvas canvas) {}


    // EGL functions
    public boolean InitGL() {

        try {
            EGL10 egl = (EGL10)EGLContext.getEGL();

            EGLDisplay dpy = egl.eglGetDisplay(EGL10.EGL_DEFAULT_DISPLAY);

            int[] version = new int[2];
            egl.eglInitialize(dpy, version);
			
            int[] configSpec = {
                EGL10.EGL_DEPTH_SIZE,   8,
                EGL10.EGL_RED_SIZE,   8,
                EGL10.EGL_GREEN_SIZE,   8,
                EGL10.EGL_BLUE_SIZE,   8,
                EGL10.EGL_RENDERABLE_TYPE, 1,
                EGL10.EGL_NONE
            };
            EGLConfig[] configs = new EGLConfig[1];
            int[] num_config = new int[1];
            if (!egl.eglChooseConfig(dpy, configSpec, configs, 1, num_config) || num_config[0] == 0) {
                Log.e("SDL", "No EGL config available");
                return false;
            }
            EGLConfig config = configs[0];

            int EGL_CONTEXT_CLIENT_VERSION=0x3098;
            int contextAttrs[] = new int[]
            {
                EGL_CONTEXT_CLIENT_VERSION, 1,
                EGL10.EGL_NONE
            }; 
            EGLContext ctx = egl.eglCreateContext(dpy, config, EGL10.EGL_NO_CONTEXT, contextAttrs);
            if (ctx == EGL10.EGL_NO_CONTEXT) {
                Log.e("SDL", "Couldn't create context");
                return false;
            }

            EGLSurface surface = egl.eglCreateWindowSurface(dpy, config, this, null);
            if (surface == EGL10.EGL_NO_SURFACE) {
                Log.e("SDL", "Couldn't create surface");
                return false;
            }

            if (!egl.eglMakeCurrent(dpy, surface, surface, ctx)) {
                Log.e("SDL", "Couldn't make context current");
                return false;
            }

            mEGLContext = ctx;
            mEGLDisplay = dpy;
            mEGLSurface = surface;

        } catch(Exception e) {
            Log.v("SDL", e + "");
            for (StackTraceElement s : e.getStackTrace()) {
                Log.v("SDL", s.toString());
            }
        }

        return true;
    }

    // EGL buffer flip
    public void SwapBuffers() {
        try {
            EGL10 egl = (EGL10)EGLContext.getEGL();

            egl.eglWaitNative(EGL10.EGL_CORE_NATIVE_ENGINE, null);

            // drawing here

            egl.eglWaitGL();

            egl.eglSwapBuffers(mEGLDisplay, mEGLSurface);


        } catch(Exception e) {
            Log.v("SDL", "flipEGL(): " + e);
            for (StackTraceElement s : e.getStackTrace()) {
                Log.v("SDL", s.toString());
            }
        }
    }

    // Key events
    public boolean onKey(View  v, int keyCode, KeyEvent event) {

        if (event.getAction() == KeyEvent.ACTION_DOWN) {
            //Log.v("SDL", "key down: " + keyCode);
            //XashActivity.controlInterp.onKeyDown(keyCode, event);
            return true;
        }
        else if (event.getAction() == KeyEvent.ACTION_UP) {
            //Log.v("SDL", "key up: " + keyCode);
           // XashActivity.controlInterp.onKeyUp(keyCode, event);
            return true;
        }
        return false;
    }

    // Touch events
    public boolean onTouch(View v, MotionEvent event) {
			/*
			final int touchDevId = event.getDeviceId();
			final int pointerCount = event.getPointerCount();
			// touchId, pointerId, action, x, y, pressure
			int actionPointerIndex = event.getActionIndex();
			int pointerFingerId = event.getPointerId(actionPointerIndex);
			int action = event.getActionMasked();

			float x = event.getX(actionPointerIndex);
			float y = event.getY(actionPointerIndex);
			float p = event.getPressure(actionPointerIndex);

			if (action == MotionEvent.ACTION_MOVE && pointerCount > 1) {
                // TODO send motion to every pointer if its position has
                // changed since prev event.
                for (int i = 0; i < pointerCount; i++) {
                    pointerFingerId = event.getPointerId(i);
                    x = event.getX(i);
                    y = event.getY(i);
                    p = event.getPressure(i);
                    XashActivity.onNativeTouch(touchDevId, pointerFingerId, action, x, y, p);
                }
			} else {
                XashActivity.onNativeTouch(touchDevId, pointerFingerId, action, x, y, p);
			}
        }*/
        //XashActivity.controlInterp.onTouchEvent(event);
		return true;
	} 

}