package com.android.gallery3d.filtershow.imageshow;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;

import com.android.gallery3d.filtershow.filters.ImageFilterDraw;
import com.android.gallery3d.filtershow.filters.RedEyeCandidate;

public class ImageDraw extends ImageShow {

    private static final String LOGTAG = "ImageDraw";

    public ImageDraw(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public ImageDraw(Context context) {
        super(context);
    }

    @Override
    public void resetParameter() {
        ImageFilterDraw filter = (ImageFilterDraw) getCurrentFilter();
        if (filter != null) {
            filter.clear();
        }

        invalidate();
    }

    @Override
    public void updateImage() {
        super.updateImage();
        invalidate();
    }

    float[] mTmpPoint = new float[2]; // so we do not malloc
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getPointerCount() != 1) {
            return false;
        }

        ImageFilterDraw filter = (ImageFilterDraw) getCurrentFilter();

        if (event.getAction() == MotionEvent.ACTION_DOWN) {

            mTmpPoint[0] = event.getX();
            mTmpPoint[1] = event.getY();
            mToOrig.mapPoints(mTmpPoint);
            float[] hsv = new float[3];
            hsv[0] = (float) (360 * Math.random());
            hsv[1] = 1;
            hsv[2] = 1;
            int col = Color.HSVToColor(0x88, hsv);
            filter.startSection(col, mTmpPoint[0], mTmpPoint[1]);

        }
        if (event.getAction() == MotionEvent.ACTION_MOVE) {
            int historySize = event.getHistorySize();
            final int pointerCount = event.getPointerCount();
            for (int h = 0; h < historySize; h++) {
                int p = 0;
                {
                    mTmpPoint[0] = event.getHistoricalX(p, h);
                    mTmpPoint[1] = event.getHistoricalY(p, h);
                    mToOrig.mapPoints(mTmpPoint);
                    filter.addPoint(mTmpPoint[0], mTmpPoint[1]);
                }
            }
        }
        if (event.getAction() == MotionEvent.ACTION_UP) {
            mTmpPoint[0] = event.getX();
            mTmpPoint[1] = event.getY();
            mToOrig.mapPoints(mTmpPoint);
            filter.endSection(mTmpPoint[0], mTmpPoint[1]);
            this.resetImageCaches(this);

        }
        invalidate();
        return true;
    }

    Matrix mRotateToScreen;
    Matrix mToScreen;
    Matrix mToOrig = new Matrix();
    private void calcScreenMapping() {

        GeometryMetadata geo = getImagePreset().mGeoData;
        mToScreen = geo.getOriginalToScreen(false,
                mImageLoader.getOriginalBounds().width(),
                mImageLoader.getOriginalBounds().height(), getWidth(), getHeight());
        mRotateToScreen = geo.getOriginalToScreen(true,
                mImageLoader.getOriginalBounds().width(),
                mImageLoader.getOriginalBounds().height(), getWidth(), getHeight());
        mRotateToScreen.invert(mToOrig);
        mToOrig.invert(mRotateToScreen);
    }

    @Override
    public void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        calcScreenMapping();

        ImageFilterDraw filter = (ImageFilterDraw) getCurrentFilter();
        filter.draw(canvas, mRotateToScreen);
    }
}