package org.hedgewars.mobile;

import javax.microedition.khronos.egl.EGL10;

import javax.microedition.khronos.egl.EGLConfig;

import javax.microedition.khronos.egl.EGLContext;

import javax.microedition.khronos.egl.EGLDisplay;

import javax.microedition.khronos.egl.EGLSurface;

import org.hedgewars.mobile.EngineProtocol.EngineProtocolNetwork;

import org.hedgewars.mobile.EngineProtocol.GameConfig;

import android.app.Activity;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.PixelFormat;

import android.hardware.Sensor;

import android.hardware.SensorEvent;

import android.hardware.SensorEventListener;

import android.hardware.SensorManager;

import android.media.AudioFormat;

import android.media.AudioManager;

import android.media.AudioTrack;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.util.Log;

import android.view.KeyEvent;

import android.view.MotionEvent;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

import android.view.View;

/**

 * SDL Activity

 */

public class SDLActivity extends Activity {

	// Main components

	public static SDLActivity mSingleton;

	public static SDLSurface mSurface;

	// Audio

	private static Thread mAudioThread;

	private static AudioTrack mAudioTrack;

	// Load the .so

	static {

		System.loadLibrary("SDL");

		System.loadLibrary("SDL_image");

		System.loadLibrary("mikmod");

		System.loadLibrary("SDL_net");

		System.loadLibrary("SDL_mixer");

		System.loadLibrary("SDL_ttf");

		System.loadLibrary("lua5.1");

		System.loadLibrary("hwengine");

		System.loadLibrary("main");

	}

	// Setup

	protected void onCreate(Bundle savedInstanceState) {

		// Log.v("SDL", "onCreate()");

		super.onCreate(savedInstanceState);

		// So we can call stuff from static callbacks

		mSingleton = this;

		// Set up the surface

		GameConfig config = getIntent().getParcelableExtra("config");

		mSurface = new SDLSurface(getApplication(), config);

		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);

	}

	// C functions we call

	public static native void nativeInit(String[] argv);

	public static native void nativeQuit();

	public static native void onNativeResize(int x, int y, int format);

	public static native void onNativeKeyDown(int keycode);

	public static native void onNativeKeyUp(int keycode);

	public static native void onNativeTouch(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(int majorVersion, int minorVersion) {

		return mSurface.initEGL(majorVersion, minorVersion);

	}

	public static void flipBuffers() {

		mSurface.flipEGL();

	}

	public static void setActivityTitle(String title) {

		// Called from SDLMain() thread and can't directly affect the view

		mSingleton.sendCommand(COMMAND_CHANGE_TITLE, title);

	}

	// 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 SDLMain implements Runnable {

	private int surfaceWidth, surfaceHeight;

	private GameConfig config;

	public SDLMain(int width, int height, GameConfig _config) {

		config = _config;

		surfaceWidth = width;

		surfaceHeight = height;

	}

	public void run() {

		// Runs SDL_main()

		EngineProtocolNetwork ipc = new EngineProtocolNetwork(config);

		String path = Utils.getDownloadPath(SDLActivity.mSingleton);

		SDLActivity.nativeInit(new String[] { String.valueOf(ipc.port),

				String.valueOf(surfaceWidth), String.valueOf(surfaceHeight),

				"0", "null", "xeli", "1", "1", "1", "0", "", path });

		// 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 SDLSurface extends SurfaceView implements SurfaceHolder.Callback,

		View.OnKeyListener, View.OnTouchListener, SensorEventListener {

	// This is what SDL runs in. It invokes SDL_main(), eventually

	private Thread mSDLThread;

	// EGL private objects

	private EGLContext mEGLContext;

	private EGLSurface mEGLSurface;

	private EGLDisplay mEGLDisplay;

	// Sensors

	private static SensorManager mSensorManager;

	private GameConfig config;

	// Startup

	public SDLSurface(Context context, GameConfig _config) {

		super(context);

		getHolder().addCallback(this);

		setFocusable(true);

		setFocusableInTouchMode(true);

		requestFocus();

		setOnKeyListener(this);

		setOnTouchListener(this);

		mSensorManager = (SensorManager) context.getSystemService("sensor");

		config = _config;

	}

	// Called when we have a valid drawing surface

	public void surfaceCreated(SurfaceHolder holder) {

		// Log.v("SDL", "surfaceCreated()");

		enableSensor(Sensor.TYPE_ACCELEROMETER, true);

	}

	// Called when we lose the surface

	public void surfaceDestroyed(SurfaceHolder holder) {

		// Log.v("SDL", "surfaceDestroyed()");

		// Send a quit message to the application

		SDLActivity.nativeQuit();

		// Now wait for the SDL thread to quit

		if (mSDLThread != null) {

			try {

				mSDLThread.join();

			} catch (Exception e) {

				Log.v("SDL", "Problem stopping thread: " + e);

			}

			mSDLThread = null;

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

		}

		enableSensor(Sensor.TYPE_ACCELEROMETER, false);

	}

	// Called when the surface is resized

	public void surfaceChanged(SurfaceHolder holder, int format, int width,

			int height) {

		Log.d("SDL", "surfaceChanged()" + width + " + " + height);

		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;

		}

		SDLActivity.onNativeResize(width, height, sdlFormat);

		// Now start up the C app thread

		if (mSDLThread == null) {

			mSDLThread = new Thread(new SDLMain(width, height, config),

					"SDLThread");

			mSDLThread.start();

		}

	}

	// unused

	public void onDraw(Canvas canvas) {

	}

	// EGL functions

	public boolean initEGL(int majorVersion, int minorVersion) {

		Log.v("SDL", "Starting up OpenGL ES " + majorVersion + "."

				+ minorVersion);

		try {

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

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

			int[] version = new int[2];

			egl.eglInitialize(dpy, version);

			int EGL_OPENGL_ES_BIT = 1;

			int EGL_OPENGL_ES2_BIT = 4;

			int renderableType = 0;

			if (majorVersion == 2) {

				renderableType = EGL_OPENGL_ES2_BIT;

			} else if (majorVersion == 1) {

				renderableType = EGL_OPENGL_ES_BIT;

			}

			int[] configSpec = {

					// EGL10.EGL_DEPTH_SIZE, 16,

					EGL10.EGL_RENDERABLE_TYPE, renderableType, 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];

			EGLContext ctx = egl.eglCreateContext(dpy, config,

					EGL10.EGL_NO_CONTEXT, null);

			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 flipEGL() {

		try {

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

			egl.eglWaitNative(EGL10.EGL_NATIVE_RENDERABLE, 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);

			SDLActivity.onNativeKeyDown(keyCode);

			return true;

		} else if (event.getAction() == KeyEvent.ACTION_UP) {

			// Log.v("SDL", "key up: " + keyCode);