package com.lovenav.utils;

import com.alibaba.fastjson.JSON;
import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.lovenav.dao.CollectIconListDao;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;


import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;
import java.util.*;

@Component
@Service
public class QRCodeUtil {
    private static final String CHARSET = "utf-8";
    private static final String FORMAT_NAME = "JPG";
    // 二维码尺寸
    private static final int QRCODE_SIZE = 300;
    // LOGO宽度
    private static final int WIDTH = 60;
    // LOGO高度
    private static final int HEIGHT = 60;

    private static BufferedImage createImage(String content, String imgPath,
                                             boolean needCompress) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
                BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000
                        : 0xFFFFFFFF);
            }
        }
        if (imgPath == null || "".equals(imgPath)) {
            return image;
        }
        // 插入图片
        QRCodeUtil.insertImage(image, imgPath, needCompress);
        return image;
    }

    /**
     * 插入LOGO
     *
     * @param source
     *            二维码图片
     * @param imgPath
     *            LOGO图片地址
     * @param needCompress
     *            是否压缩
     * @throws Exception
     */
    private static void insertImage(BufferedImage source, String imgPath,
                                    boolean needCompress) throws Exception {
        File file = new File(imgPath);
        if (!file.exists()) {
            System.err.println(""+imgPath+"   该文件不存在！");
            return;
        }
        Image src = ImageIO.read(new File(imgPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) { // 压缩LOGO
            if (width > WIDTH) {
                width = WIDTH;
            }
            if (height > HEIGHT) {
                height = HEIGHT;
            }
            Image image = src.getScaledInstance(width, height,
                    Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图
            g.dispose();
            src = image;
        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
        int x = (QRCODE_SIZE - width) / 2;
        int y = (QRCODE_SIZE - height) / 2;
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }

    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content
     *            内容
     * @param imgPath
     *            LOGO地址
     * @param destPath
     *            存放目录
     * @param needCompress
     *            是否压缩LOGO
     * @throws Exception
     */
    public static String encode(String content, String imgPath, String destPath,
                                boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
                needCompress);
        mkdirs(destPath);
        String file = new Random().nextInt(99999999)+".jpg";
        ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
        return destPath+"/"+file;
    }

    /**
     * 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
     * @param destPath 存放目录
     */
    public static void mkdirs(String destPath) {
        File file =new File(destPath);
        //当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }

    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content
     *            内容
     * @param imgPath
     *            LOGO地址
     * @param destPath
     *            存储地址
     * @throws Exception
     */
    public static void encode(String content, String imgPath, String destPath)
            throws Exception {
        QRCodeUtil.encode(content, imgPath, destPath, false);
    }

    /**
     * 生成二维码
     *
     * @param content
     *            内容
     * @param destPath
     *            存储地址
     * @param needCompress
     *            是否压缩LOGO
     * @throws Exception
     */
    public static void encode(String content, String destPath,
                              boolean needCompress) throws Exception {
        QRCodeUtil.encode(content, null, destPath, needCompress);
    }

    /**
     * 生成二维码
     *
     * @param content
     *            内容
     * @param destPath
     *            存储地址
     * @throws Exception
     */
    public static void encode(String content, String destPath) throws Exception {
        QRCodeUtil.encode(content, null, destPath, false);
    }

    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content
     *            内容
     * @param imgPath
     *            LOGO地址
     * @param output
     *            输出流
     * @param needCompress
     *            是否压缩LOGO
     * @throws Exception
     */
    public static void encode(String content, String imgPath,
                              OutputStream output, boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
                needCompress);
        ImageIO.write(image, FORMAT_NAME, output);
    }

    /**
     * 生成二维码
     *
     * @param content
     *            内容
     * @param output
     *            输出流
     * @throws Exception
     */
    public static void encode(String content, OutputStream output)
            throws Exception {
        QRCodeUtil.encode(content, null, output, false);
    }

    /**
     * 解析二维码
     *
     * @param file
     *            二维码图片
     * @return
     * @throws Exception
     */
    public static String decode(File file) throws Exception {
        BufferedImage image;
        image = ImageIO.read(file);
        if (image == null) {
            return null;
        }
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(
                image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Result result;
        Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();
        return resultStr;
    }

    /**
     * 解析二维码
     *
     * @param path
     *            二维码图片地址
     * @return
     * @throws Exception
     */
    public static String decode(String path) throws Exception {
        return QRCodeUtil.decode(new File(path));
    }

    /**
     *
     * @param content
     * @param imgPath
     * @param destPath
     * @param localUrl 当前环境的域名或者ip地址
     * @param needCompress
     * @return
     * @throws Exception
     */
    public static String encode(String content, String imgPath, String destPath,String localUrl,
                                boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
                needCompress);
        mkdirs(destPath);
        String file = new Random().nextInt(99999999)+".jpg";
        ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
        return localUrl+file;
    }

    public static String encodeDZ(String content, String imgPath, String destPath,String localUrl,int length,int width,
                                  boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImageDZ(content, imgPath,length,width,
                needCompress);
        mkdirs(destPath);
        String file = new Random().nextInt(99999999)+".jpg";
        ImageIO.write(image, FORMAT_NAME, new File(destPath+"/"+file));
        return localUrl+file;
    }

    private static BufferedImage createImageDZ(String content, String imgPath,int newlength,int newWidth,
                                               boolean needCompress) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
                BarcodeFormat.QR_CODE, newlength, newWidth, hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.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, bitMatrix.get(x, y) ? 0xFF000000
                        : 0xFFFFFFFF);
            }
        }
        if (imgPath == null || "".equals(imgPath)) {
            return image;
        }
        // 插入图片
        QRCodeUtil.insertImage(image, imgPath, needCompress);
        return image;
    }



    /**
     * 将图片url转换成base64流
     * @param url
     * @return
     */
    public static String getBase64(String url){
        MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
        Map hints = new HashMap();
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); //设置字符集编码类型
        hints.put(EncodeHintType.MARGIN, 1);  //设置白边
        BitMatrix bitMatrix = null;
        try {
            bitMatrix = multiFormatWriter.encode(url, BarcodeFormat.QR_CODE, 300, 300,hints);
            BufferedImage image = toBufferedImage(bitMatrix);
            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
            //输出二维码图片流
            try {
                ImageIO.write(image, "jpg",outputStream);
                Base64.Encoder encoder = Base64.getEncoder();
                String base =encoder.encodeToString(outputStream.toByteArray());
                return base;
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } catch (WriterException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        return null;
    }


    public 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) ? 0xFF000000 : 0xFFFFFFFF);//0xFF000000黑；0xFFFFFFFF白
            }
        }
        return image;
    }

//    获取本地图片路径，转为base64
    public static String ImageToBase64(String imgPath) {
        byte[] data = null;
        // 读取图片字节数组
        try {
            InputStream in = new FileInputStream(imgPath);
            data = new byte[in.available()];
            in.read(data);
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        // 对字节数组Base64编码
        Base64.Encoder encoder = Base64.getEncoder();
        // 返回Base64编码过的字节数组字符串
//        System.out.println("本地图片转换Base64:" + encoder.encodeToString(data));
        return encoder.encodeToString(data);
    }

    /**
     * 根据图片url下载图片到本地
     */

    public static String downloadPicture(String pictureurl) throws Exception {
        //因为是测试，图片url可以随便搞一个，我从百度随便复制了个图片url
        String pictureUrl = pictureurl;
        //建立图片连接
        URL url = new URL(pictureUrl);
        HttpURLConnection connection = (HttpURLConnection)url.openConnection();
        //设置请求方式
        connection.setRequestMethod("GET");
        //设置超时时间
        connection.setConnectTimeout(10*1000);

        //输入流
        InputStream stream = connection.getInputStream();
        int len = 0;
        byte[] test = new byte[1024];


        //获取项目路径
        File directory = new File("src/main/resources/static/icon");
        String paths = directory.getCanonicalPath();
        //如果没有文件夹则创建
        File file = new File("src/main/resources/static/icon");
        if (!file.exists()){
            file.mkdirs();
        }

        //设置图片名称，这个随意
        String date = new Random().nextInt(99999999)+".jpg";
        String fileName = date ;

        //输出流，图片输出的目的文件
        String serverPath = "src/main/resources/static/icon";
        BufferedOutputStream fos = new BufferedOutputStream(new FileOutputStream(serverPath +"/" + fileName));

        //以流的方式上传
        while ((len =stream.read(test)) !=-1){
            fos.write(test,0,len);
        }


        //记得关闭流，不然消耗资源
        stream.close();
        fos.close();
        return (serverPath +"/" + fileName);
    }

    public static void main(String[] args) throws Exception {
//        String text = "https://www.baidu.com";  //这里设置自定义网站url
//        String logoPath ="src/main/resources/static/logo/NAV.png";
//        String destPath = "src/main/resources/static/qr";
//        String url = QRCodeUtil.encode(text, logoPath, destPath, true);
//        QRCodeUtil.ImageToBase64("src/main/resources/static/qr/44672405.jpg");
//        System.out.println(url);
//        String base64 = getBase64(url);
//        System.out.println(base64);

       /* String file="D:\\11.jpg";
        String info=QRCodeUtil.decode(file);
        System.out.println(info);*/
    }
}