package cn.aaronyi.ameneye.utils.gallery;


import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 * Image compress factory class
 *
 * @author
 */
public class ImageFactory {

    /**
     * Get bitmap from specified image path
     *
     * @param imgPath
     * @return
     */
    public static Bitmap getBitmap(String imgPath) {
        // Get bitmap through image path
        BitmapFactory.Options newOpts = new BitmapFactory.Options();
        newOpts.inJustDecodeBounds = false;
        newOpts.inPurgeable = true;
        newOpts.inInputShareable = true;
        // Do not compress
        newOpts.inSampleSize = 1;
        newOpts.inPreferredConfig = Config.ARGB_8888;
        return BitmapFactory.decodeFile(imgPath, newOpts);
    }

    /**
     * Store bitmap into specified image path
     *
     * @param bitmap
     * @param outPath
     * @throws FileNotFoundException
     */
    public void storeImage(Bitmap bitmap, String outPath) throws FileNotFoundException {
        FileOutputStream os = new FileOutputStream(outPath);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, os);
    }

    /**
     * Compress image by pixel, this will modify image width/height.
     * Used to get thumbnail
     *
     * @param imgPath image path
     * @param pixelW  target pixel of width
     * @param pixelH  target pixel of height
     * @return
     */
    public Bitmap ratio(String imgPath, float pixelW, float pixelH) {
        BitmapFactory.Options newOpts = new BitmapFactory.Options();
        // 开始读入图片,此时把options.inJustDecodeBounds 设回true,即只读边不读内容
        newOpts.inJustDecodeBounds = true;
        newOpts.inPreferredConfig = Config.RGB_565;
        // Get bitmap info, but notice that bitmap is null now
        Bitmap bitmap = BitmapFactory.decodeFile(imgPath, newOpts);

        newOpts.inJustDecodeBounds = false;
        int w = newOpts.outWidth;
        int h = newOpts.outHeight;
        // 想要缩放的目标尺寸
        float hh = pixelH;// 设置高度为240f时,可以明显看到图片缩小了
        float ww = pixelW;// 设置宽度为120f,可以明显看到图片缩小了
        // 缩放比。由于是固定比例缩放,只用高或者宽其中一个数据进行计算即可
        int be = 1;//be=1表示不缩放
        if (w > h && w > ww) {//如果宽度大的话根据宽度固定大小缩放
            be = (int) (newOpts.outWidth / ww);
        } else if (w < h && h > hh) {//如果高度高的话根据宽度固定大小缩放
            be = (int) (newOpts.outHeight / hh);
        }
        if (be <= 0) be = 1;
        newOpts.inSampleSize = be;//设置缩放比例
        // 开始压缩图片,注意此时已经把options.inJustDecodeBounds 设回false了
        bitmap = BitmapFactory.decodeFile(imgPath, newOpts);
        // 压缩好比例大小后再进行质量压缩
//        return compress(bitmap, maxSize); // 这里再进行质量压缩的意义不大,反而耗资源,删除
        return bitmap;
    }

    /**
     * Compress image by size, this will modify image width/height.
     * Used to get thumbnail
     *
     * @param image
     * @param pixelW target pixel of width
     * @param pixelH target pixel of height
     * @return
     */
    public Bitmap ratio(Bitmap image, float pixelW, float pixelH) {
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        image.compress(Bitmap.CompressFormat.JPEG, 100, os);
        if (os.toByteArray().length / 1024 > 1024) {//判断如果图片大于1M,进行压缩避免在生成图片(BitmapFactory.decodeStream)时溢出
            os.reset();//重置baos即清空baos
            image.compress(Bitmap.CompressFormat.JPEG, 50, os);//这里压缩50%,把压缩后的数据存放到baos中
        }
        ByteArrayInputStream is = new ByteArrayInputStream(os.toByteArray());
        BitmapFactory.Options newOpts = new BitmapFactory.Options();
        //开始读入图片,此时把options.inJustDecodeBounds 设回true了
        newOpts.inJustDecodeBounds = true;
        newOpts.inPreferredConfig = Config.RGB_565;
        Bitmap bitmap = BitmapFactory.decodeStream(is, null, newOpts);
        newOpts.inJustDecodeBounds = false;
        int w = newOpts.outWidth;
        int h = newOpts.outHeight;
        float hh = pixelH;// 设置高度为240f时,可以明显看到图片缩小了
        float ww = pixelW;// 设置宽度为120f,可以明显看到图片缩小了
        //缩放比。由于是固定比例缩放,只用高或者宽其中一个数据进行计算即可
        int be = 1;//be=1表示不缩放
        if (w > h && w > ww) {//如果宽度大的话根据宽度固定大小缩放
            be = (int) (newOpts.outWidth / ww);
        } else if (w < h && h > hh) {//如果高度高的话根据宽度固定大小缩放
            be = (int) (newOpts.outHeight / hh);
        }
        if (be <= 0) be = 1;
        newOpts.inSampleSize = be;//设置缩放比例
        //重新读入图片,注意此时已经把options.inJustDecodeBounds 设回false了
        is = new ByteArrayInputStream(os.toByteArray());
        bitmap = BitmapFactory.decodeStream(is, null, newOpts);
        //压缩好比例大小后再进行质量压缩
//	    return compress(bitmap, maxSize); // 这里再进行质量压缩的意义不大,反而耗资源,删除
        return bitmap;
    }

    /**
     * @param filepath image file path
     * @param outPath
     * @param maxSize  target will be compressed to be smaller than this size.(kb)
     * @throws IOException
     */
    public static void compressAndGenImage(String filepath, String outPath, int maxSize) throws IOException {

        compressAndGenImage(getBitmap(filepath), outPath, maxSize);

    }

    /**
     * Compress by quality,  and generate image to the path specified
     *
     * @param image
     * @param outPath
     * @param maxSize target will be compressed to be smaller than this size.(kb)
     * @throws IOException
     */
    public static void compressAndGenImage(Bitmap image, String outPath, int maxSize) throws IOException {
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        // scale
        int options = 100;
        // Store the bitmap into output stream(no compress)
        image.compress(Bitmap.CompressFormat.JPEG, options, os);
        // Compress by loop
        while (os.toByteArray().length / 1024 > maxSize) {
            // Clean up os
            os.reset();
            // interval 10
            options -= 10;
            image.compress(Bitmap.CompressFormat.JPEG, options, os);
        }

        // Generate compressed image file
        FileOutputStream fos = new FileOutputStream(outPath);
        fos.write(os.toByteArray());
        fos.flush();
        fos.close();
    }

    /**
     * Compress by quality,  and generate image to the path specified
     *
     * @param imgPath
     * @param outPath
     * @param maxSize     target will be compressed to be smaller than this size.(kb)
     * @param needsDelete Whether delete original file after compress
     * @throws IOException
     */
    public void compressAndGenImage(String imgPath, String outPath, int maxSize, boolean needsDelete) throws IOException {
        compressAndGenImage(getBitmap(imgPath), outPath, maxSize);

        // Delete original file
        if (needsDelete) {
            File file = new File(imgPath);
            if (file.exists()) {
                file.delete();
            }
        }
    }

    /**
     * Ratio and generate thumb to the path specified
     *
     * @param image
     * @param outPath
     * @param pixelW  target pixel of width
     * @param pixelH  target pixel of height
     * @throws FileNotFoundException
     */
    public void ratioAndGenThumb(Bitmap image, String outPath, float pixelW, float pixelH) throws FileNotFoundException {
        Bitmap bitmap = ratio(image, pixelW, pixelH);
        storeImage(bitmap, outPath);
    }

    /**
     * Ratio and generate thumb to the path specified
     *
     * @param imgPath
     * @param outPath
     * @param pixelW      target pixel of width
     * @param pixelH      target pixel of height
     * @param needsDelete Whether delete original file after compress
     * @throws FileNotFoundException
     */
    public void ratioAndGenThumb(String imgPath, String outPath, float pixelW, float pixelH, boolean needsDelete) throws FileNotFoundException {
        Bitmap bitmap = ratio(imgPath, pixelW, pixelH);
        storeImage(bitmap, outPath);

        // Delete original file
        if (needsDelete) {
            File file = new File(imgPath);
            if (file.exists()) {
                file.delete();
            }
        }
    }

}