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      contributors may be used to endorse or promote products derived
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ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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 */
package com.android.camera.imageprocessor.filter;

import android.content.Intent;
import android.graphics.ImageFormat;
import android.graphics.Rect;
import android.graphics.YuvImage;
import android.hardware.camera2.CameraAccessException;
import android.hardware.camera2.CameraCaptureSession;
import android.hardware.camera2.CameraCharacteristics;
import android.hardware.camera2.CaptureRequest;
import android.hardware.camera2.CaptureResult;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;

import com.android.camera.BestpictureActivity;
import com.android.camera.CameraActivity;
import com.android.camera.CaptureModule;
import com.android.camera.MediaSaveService;
import com.android.camera.PhotoModule;
import com.android.camera.imageprocessor.PostProcessor;
import com.android.camera.util.CameraUtil;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.List;

public class BestpictureFilter implements ImageFilter {
    public static final int NUM_REQUIRED_IMAGE = 10;
    private int mWidth;
    private int mHeight;
    private int mStrideY;
    private int mStrideVU;
    private static String TAG = "BestpictureFilter";
    private static final boolean DEBUG = false;
    private static boolean mIsSupported = true;
    private CaptureModule mModule;
    private CameraActivity mActivity;
    private int mOrientation = 0;
    final String[] NAMES = {"00.jpg", "01.jpg", "02.jpg", "03.jpg",
            "04.jpg", "05.jpg", "06.jpg", "07.jpg", "08.jpg"
            ,"09.jpg"};

    private final static int TIME_DELAY = 50;
    private int mSavedCount = 0;
    private PhotoModule.NamedImages mNamedImages;
    private ByteBuffer mBY;
    private ByteBuffer mBVU;

    private static void Log(String msg) {
        if (DEBUG) {
            Log.d(TAG, msg);
        }
    }

    public BestpictureFilter(CaptureModule module, CameraActivity activity) {
        mModule = module;
        mActivity = activity;
        mNamedImages = new PhotoModule.NamedImages();
    }

    @Override
    public List<CaptureRequest> setRequiredImages(CaptureRequest.Builder builder) {
        List<CaptureRequest> list = new ArrayList<CaptureRequest>();
        for(int i=0; i < NUM_REQUIRED_IMAGE; i++) {
            list.add(builder.build());
        }
        return list;
    }

    @Override
    public String getStringName() {
        return "BestpictureFilter";
    }

    @Override
    public int getNumRequiredImage() {
        return NUM_REQUIRED_IMAGE;
    }

    @Override
    public void init(int width, int height, int strideY, int strideVU) {
        Log("init");
        mWidth = width/2*2;
        mHeight = height/2*2;
        mStrideY = strideY/2*2;
        mStrideVU = strideVU / 2 * 2;
        Log("width: " + mWidth + " height: " + mHeight + " strideY: " + mStrideY + " strideVU: " + mStrideVU);
    }

    @Override
    public void deinit() {
        Log("deinit");
    }

    @Override
    public void addImage(final ByteBuffer bY, final ByteBuffer bVU, final int imageNum, Object param) {
        Log("addImage");
        if(imageNum == 0) {
            mOrientation = CameraUtil.getJpegRotation(mModule.getMainCameraId(), mModule.getDisplayOrientation());
            mSavedCount = 0;
            mBY = bY;
            mBVU = bVU;
        }
        new Thread() {
            public void run() {
                saveToPrivateFile(imageNum, nv21ToJpeg(bY, bVU, new Rect(0, 0, mWidth, mHeight), mOrientation));
                mSavedCount++;
            }
        }.start();
    }

    @Override
    public ResultImage processImage() {
        long captureStartTime = System.currentTimeMillis();
        mNamedImages.nameNewImage(captureStartTime);
        PhotoModule.NamedImages.NamedEntity name = mNamedImages.getNextNameEntity();
        String title = (name == null) ? null : name.title;
        long date = (name == null) ? -1 : name.date;
        mActivity.getMediaSaveService().addImage(
                nv21ToJpeg(mBY, mBVU, new Rect(0, 0, mWidth, mHeight), mOrientation), title, date, null, mWidth, mHeight,
                        mOrientation, null, new MediaSaveService.OnMediaSavedListener() {
                    @Override
                    public void onMediaSaved(Uri uri) {
                        if (uri != null) {
                            mActivity.notifyNewMedia(uri);
                        }
                        startBestpictureActivity(uri);
                    }
                }
                , mActivity.getContentResolver(), "jpeg");
        while(mSavedCount < NUM_REQUIRED_IMAGE) {
            try {
                Thread.sleep(1);
            } catch (Exception e) {
            }
        }
        return null;
    }

    private void startBestpictureActivity(Uri uri) {
        Intent intent = new Intent();
        intent.setData(uri);
        intent.setClass(mActivity, BestpictureActivity.class);
        mActivity.startActivityForResult(intent, BestpictureActivity.BESTPICTURE_ACTIVITY_CODE);
    }

    @Override
    public boolean isSupported() {
        return mIsSupported;
    }

    @Override
    public boolean isFrameListener() {
        return false;
    }

    @Override
    public boolean isManualMode() {
        return false;
    }

    @Override
    public void manualCapture(CaptureRequest.Builder builder, CameraCaptureSession captureSession,
                              CameraCaptureSession.CaptureCallback callback, Handler handler) throws CameraAccessException {
        for(int i=0; i < NUM_REQUIRED_IMAGE; i++) {
            captureSession.capture(builder.build(), callback, handler);
            try {
                Thread.sleep(TIME_DELAY);
            } catch (InterruptedException e) {
            }
        }
    }

    public static boolean isSupportedStatic() {
        return mIsSupported;
    }

    private byte[] nv21ToJpeg(ByteBuffer bY, ByteBuffer bVU, Rect roi, int orientation) {
        ByteBuffer buf =  ByteBuffer.allocate(mStrideY*mHeight*3/2);
        buf.put(bY);
        bY.rewind();
        if(bVU != null) {
            buf.put(bVU);
            bVU.rewind();
        }
        BitmapOutputStream bos = new BitmapOutputStream(1024);
        YuvImage im = new YuvImage(buf.array(), ImageFormat.NV21,
                mWidth, mHeight, new int[]{mStrideY, mStrideVU});
        im.compressToJpeg(roi, 50, bos);
        byte[] bytes = bos.getArray();
        bytes = PostProcessor.addExifTags(bytes, orientation);
        return bytes;
    }

    private class BitmapOutputStream extends ByteArrayOutputStream {
        public BitmapOutputStream(int size) {
            super(size);
        }

        public byte[] getArray() {
            return buf;
        }
    }

    private void saveToPrivateFile(final int index, final byte[] bytes) {
        String filesPath = mActivity.getFilesDir()+"/Bestpicture";
        File file = new File(filesPath);
        if(!file.exists()) {
            file.mkdir();
        }
        file = new File(filesPath+"/"+NAMES[index]);
        try {
            FileOutputStream out = new FileOutputStream(file);
            out.write(bytes, 0, bytes.length);
            out.close();
        } catch (Exception e) {
        }
    }
}