import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.pdf.PdfRenderer;
import android.os.ParcelFileDescriptor;
import android.text.TextUtils;
import android.util.Log;
import android.util.Base64;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.ChecksumException;
import com.google.zxing.EncodeHintType;
import com.google.zxing.FormatException;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.NotFoundException;
import com.google.zxing.RGBLuminanceSource;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.CharacterSetECI;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.pdf417.PDF417Writer;
import com.google.zxing.pdf417.encoder.Compaction;
import com.google.zxing.pdf417.encoder.Dimensions;
import com.google.zxing.pdf417.encoder.PDF417;
import com.google.zxing.qrcode.QRCodeReader;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;


import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;

/**
 * 二维码生成工具类
 */
public class QRCodeGenerator {
	private static final String TAG = "ZxingUtil";
	

	/**
	 * 在二维码中间添加Logo图案
	 */
	private static Bitmap addLogo(Bitmap src,int logoW,int logoH, Bitmap logo) {
		if (src == null) {
			return null;
		}

		if (logo == null) {
			return src;
		}
		logo=resizeBitmap(logo,logoW,logoH);
		// 获取图片的宽高
		int srcWidth = src.getWidth();
		int srcHeight = src.getHeight();
		int logoWidth = logo.getWidth();
		int logoHeight = logo.getHeight();

		if (srcWidth == 0 || srcHeight == 0) {
			return null;
		}

		if (logoWidth == 0 || logoHeight == 0) {
			return src;
		}

		// logo大小为二维码整体大小的1/5
		// float scaleFactor = srcWidth * 1.0f / 5 / logoWidth;
		Bitmap bitmap = Bitmap.createBitmap(srcWidth, srcHeight,
				Bitmap.Config.ARGB_8888);
		try {
			Canvas canvas = new Canvas(bitmap);
			canvas.drawBitmap(src, 0, 0, null);
			// canvas.scale(scaleFactor, scaleFactor, srcWidth / 2, srcHeight / 2);
			canvas.drawBitmap(logo, (srcWidth - logoWidth) / 2,
					(srcHeight - logoHeight) / 2, null);

			canvas.save();
			canvas.restore();
		} catch (Exception e) {
			bitmap = null;
			e.getStackTrace();
		}

		return bitmap;
	}
	public static Bitmap generateQRCodeWithLogo(String content, int widthPix,
										   int heightPix,int logoW,int logoH, Bitmap logoBm) {

		if (content == null || "".equals(content)) {
			return null;
		}
		Bitmap bitmap = null;
		// 配置参数
		Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
		hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
		// 容错级别
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
		// 设置空白边距的宽度
	hints.put(EncodeHintType.MARGIN, 0); //default is 4


		// 图像数据转换，使用了矩阵转换
		BitMatrix bitMatrix;
		try {
			bitMatrix = new QRCodeWriter().encode(content,
					BarcodeFormat.QR_CODE, widthPix, heightPix, hints);

			int[] pixels = new int[widthPix * heightPix];
			// 下面这里按照二维码的算法，逐个生成二维码的图片，
			// 两个for循环是图片横列扫描的结果
			for (int y = 0; y < heightPix; y++) {
				for (int x = 0; x < widthPix; x++) {
					if (bitMatrix.get(x, y)) {
						pixels[y * widthPix + x] = 0xff000000;
					} else {
						pixels[y * widthPix + x] = 0xffffffff;
					}
				}
			}

			// 生成二维码图片的格式，使用ARGB_8888
			bitmap = Bitmap.createBitmap(widthPix, heightPix,
					Bitmap.Config.ARGB_8888);
			bitmap.setPixels(pixels, 0, widthPix, 0, 0, widthPix, heightPix);

			if (logoBm != null) {
				bitmap = addLogo(bitmap, logoW,logoH,logoBm);
			}
			// if(!TextUtils.isEmpty(filePath)){


			// 	bitmap.compress(Bitmap.CompressFormat.JPEG, 100,
			// 			new FileOutputStream(filePath));}
		} catch (WriterException e) {
			//
			e.printStackTrace();
		}
		return bitmap;

	}


	public static Bitmap resizeBitmap(Bitmap originalBitmap, int newWidth, int newHeight) {
	    // 创建一个新的Bitmap对象，指定缩放后的宽度、高度和配置（这里使用与原Bitmap相同的配置）
	    Bitmap resizedBitmap = Bitmap.createScaledBitmap(originalBitmap, newWidth, newHeight, true);
	    return resizedBitmap;
	}

	
	 public static String convert(Bitmap bitmap) {
	        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
	        // 压缩Bitmap到字节数组中，格式为PNG，质量为100%
	        bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
	        byte[] byteArray = byteArrayOutputStream.toByteArray();
	        // 将字节数组编码为Base64字符串
	        String encoded = Base64.encodeToString(byteArray, Base64.DEFAULT);
	        return encoded;
	    }

}