package com.zxing.scanner.decode;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;

import java.util.ArrayList;
import java.util.EnumMap;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;
import java.util.Vector;

public class DecodeImgThread extends Thread {
    public static final Map<DecodeHintType, Object> HINTS = new EnumMap<>(DecodeHintType.class);
    static {
        List<BarcodeFormat> formats = new ArrayList<BarcodeFormat>();
        formats.add(BarcodeFormat.QR_CODE);
        HINTS.put(DecodeHintType.POSSIBLE_FORMATS, formats);
        HINTS.put(DecodeHintType.CHARACTER_SET, "utf-8");
    }
    //
    private Bitmap scanBitmap;
    /*回调*/
    private DecodeImgCallback callback;

    public DecodeImgThread(String imgPath, DecodeImgCallback callback) {
        this.scanBitmap = getBitmap(imgPath,400,400);
        this.callback = callback;
    }

    public DecodeImgThread(Bitmap bitmap, DecodeImgCallback callback) {
        this.scanBitmap = bitmap;
        this.callback = callback;
    }


    @Override
    public void run() {
        super.run();
        if (scanBitmap == null || callback == null) {
            return;
        }
        MultiFormatReader multiFormatReader = new MultiFormatReader();
        // 解码的参数
        Hashtable<DecodeHintType, Object> hints = new Hashtable<>(2);
        // 可以解析的编码类型
        Vector<BarcodeFormat> decodeFormats = new Vector<>();
        if (decodeFormats == null || decodeFormats.isEmpty()) {
            decodeFormats = new Vector<>();
            // 扫描的类型  一维码和二维码
            decodeFormats.addAll(DecodeFormatManager.QR_CODE_FORMATS);
            decodeFormats.addAll(DecodeFormatManager.DATA_MATRIX_FORMATS);
        }
        hints.put(DecodeHintType.POSSIBLE_FORMATS, decodeFormats);
        // 设置解析的字符编码格式为UTF8
        hints.put(DecodeHintType.CHARACTER_SET, "UTF8");
        // 设置解析配置参数
        multiFormatReader.setHints(hints);
        // 开始对图像资源解码
        Result rawResult = null;
        try {
            rawResult = multiFormatReader.decodeWithState(new BinaryBitmap(new HybridBinarizer(new BitmapLuminanceSource(scanBitmap))));
            Log.i("解析结果", rawResult.getText());
        } catch (Exception e) {
            e.printStackTrace();
        }
        if (rawResult != null) {
            callback.onImageDecodeSuccess(rawResult.getText());
        } else {
            callback.onImageDecodeFailed();
        }
    }



    /**
     * 根据路径获取图片
     *
     * @param filePath  文件路径
     * @param maxWidth  图片最大宽度
     * @param maxHeight 图片最大高度
     * @return bitmap
     */
    public static Bitmap getBitmap(final String filePath, final int maxWidth, final int maxHeight) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(filePath, options);
        options.inSampleSize = calculateInSampleSize(options, maxWidth, maxHeight);
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFile(filePath, options);
    }


    /**
     * Return the sample size.
     *
     * @param options   The options.
     * @param maxWidth  The maximum width.
     * @param maxHeight The maximum height.
     * @return the sample size
     */
    private static int calculateInSampleSize(final BitmapFactory.Options options,
                                             final int maxWidth,
                                             final int maxHeight) {
        int height = options.outHeight;
        int width = options.outWidth;
        int inSampleSize = 1;
        while ((width >>= 1) >= maxWidth && (height >>= 1) >= maxHeight) {
            inSampleSize <<= 1;
        }
        return inSampleSize;
    }

}