package com.ynxbd.wx.utils;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Map;

/**
 * @author 张剑峰
 * @date 2018年6月4日下午12:38:39
 * @version v1.0.0
 * @Copyright: 2018云南新八达科技有限公司 All rights reserved.
 */
public class QRCodeUtil {

	private static final int BLACK = 0xFF000000;
	private static final int WHITE = 0xFFFFFFFF;
	private static final int GREEN = 0xFFAAAAAA;

	private static BufferedImage toBufferedImage(BitMatrix matrix) {
		int width = matrix.getWidth();
		int height = matrix.getHeight();
		BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		for (int x = 0; x < width; x++) {
			for (int y = 0; y < height; y++) {
				image.setRGB(x, y, matrix.get(x, y) ? BLACK : WHITE);
			}
		}
		return image;
	}

	private static void writeToFile(BitMatrix matrix, String format, File file) throws IOException {
		BufferedImage image = toBufferedImage(matrix);
		if (!ImageIO.write(image, format, file)) {
			throw new IOException("Could not write an image of format " + format + " to " + file);
		}
	}

	/**
	 * 将内容contents生成长宽均为width的图片，图片路径由imgPath指定
	 */
	public static File getQRCodeImage(String contents, int size, String imgPath) {
		return getQRCodeImage(contents, size, size, imgPath);
	}

	/**
	 * 将内容contents生成长为width，宽为width的图片，图片路径由imgPath指定
	 */
	public static File getQRCodeImage(String contents, int width, int height, String imgPath) {
		try {
			Map<EncodeHintType, Object> hints = new Hashtable<>();
			hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
			hints.put(EncodeHintType.CHARACTER_SET, "UTF8");

			BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);

			File imageFile = new File(imgPath);
			writeToFile(bitMatrix, "png", imageFile);
			return imageFile;
		} catch (Exception e) {
			return null;
		}
	}

	/**
	 * 将内容contents生成长为width，宽为width的图片，图片路径由imgPath指定
	 */
	public static String getQRCodeImgBase64(String contents, int width, int height) {
		String resultBase64 = null;
		try {
			Map<EncodeHintType, Object> hints = new Hashtable<>();
			hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
			hints.put(EncodeHintType.CHARACTER_SET, "UTF8");

			BitMatrix bitMatrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);

//            File imageFile = new File(imgPath);
//            writeToFile(bitMatrix, "svg", imageFile);
			return resultBase64;
		} catch (Exception e) {
			return null;
		}
	}



	public static void main(String[] args) {

//		String product_id = "999981XBD100XBD200XBD0.01XBD1";
//		// product_id = MD5Util.MD5Encode(product_id, "UTF-8");
//		String sec = Long.toString(System.currentTimeMillis());
//		String timeStamp = Long.toString(System.currentTimeMillis() / 1000);
//		SimpleDateFormat formatter = new SimpleDateFormat("yyyy年-MM月dd日-HH时mm分ss秒");
//		Date date = new Date(System.currentTimeMillis());
//		String s = formatter.format(date);
//		String nonceStr = Long.toString(System.currentTimeMillis());
//		Map<String, String> packageParams = new HashMap<>();
//		packageParams.put("appid", WeChatConfig.getAppId());
//		packageParams.put("mch_id", WeChatConfig.getMchId());
//		packageParams.put("product_id", product_id);
//		packageParams.put("time_stamp", timeStamp);
//		packageParams.put("nonce_str", nonceStr);
//		String sign = SignatureUtil.generateSign(packageParams, WeChatConfig.getMchKey());
//		 String url = "weixin://wxpay/bizpayurl?sign=" + sign + "&appid=" +
//		 WxConfig.getInstance().getAppId()
//		 + "&mch_id=" + WxConfig.getInstance().getMchId() + "&product_id=" +
//		 product_id + "&time_stamp="
//		 + timeStamp + "&nonce_str=" + nonceStr;
////		String url = "http://lhxrmyy1.natapp1.cc/wx/q?p=10000005";
//		// String url =
//		// "weixin:/pay/bizpayurl?sign=38128468EEFC56C19EDEAD077E8BD38B&appid=wx940ec0975be0daf4&mchid=1354195702&product_id=123815|814994|2074382|0.90|1&time_stamp=1533309475&nonce_str=1533309475421&";
//
//		// String[] array = product_id.split("\\|");
//		// String patientId = array[0];
//		// String mzNum = array[1];
//		// String recipeId = array[2];
//		// String payMoney = array[3];
//		// if (patientId.equals("") || mzNum.equals("") || recipeId.equals("")
//		// || payMoney.equals("")) {
//		// System.out.println("扫码支付：参数中有空值，不允许支付！product_id=" + product_id);
//		// return;
//		// }

		getQRCodeImage("http://www.wsxrmyy.cn/wx/qr-questionnaire.html", 300, "C:\\Users\\Administrator\\Desktop\\qr_questionnaire");
	}




}