package com.bizzan.bitrade.util;

import org.apache.commons.io.IOUtils;
import org.springframework.web.multipart.MultipartFile;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;

/**
 * @author Shaoxianjun
 * @date 2019/4/10
 */
public class UploadFileUtil {
    public static String uploadFile(MultipartFile file, String fileName) throws IOException {
        String directory = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
        FileOutputStream fop = null;
        try {
            InputStream inputStream = file.getInputStream();
            byte[] bytes = IOUtils.toByteArray(inputStream);
            String uploadPath = "";
            //constructs upload file path
            if (System.getProperty("os.name").toLowerCase().contains("windows")) {
                uploadPath = System.getProperty("user.dir") + File.separator + "webapp"
                        + File.separator + "common/upload" + File.separator + directory;
            } else {
                //linux服务器上传  //System.getProperty("user.dir")+ File.separator+
                uploadPath = "/web/upload" + File.separator + directory;
            }
            File file2 = new File(uploadPath);
            if (!file2.exists()) {
                file2.mkdirs();
            }
            String fileTrueName = uploadPath + File.separator + fileName;
            File file3 = new File(fileTrueName);
            if (!file3.exists()) {
                file3.createNewFile();
            }
            fop = new FileOutputStream(file3);
            fop.write(bytes);
            fop.flush();
            fop.close();
            return "upload" + File.separator + directory + File.separator + fileName;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            fop.close();
        }
        return null;
    }

    /**
     * 按设置的宽度高度压缩图片文件<br> 先保存原文件，再压缩、上传
     * @param oldFile  要进行压缩的文件全路径
     * @param newFile  新文件
     * @param width  宽度
     * @param height 高度
     * @param quality 质量
     * @return 返回压缩后的文件的全路径
     */
    public static String zipWidthHeightImageFile(File oldFile,File newFile, int width, int height,float quality) {
        if (oldFile == null) {
            return null;
        }
        String newImage = null;
        try {
            /** 对服务器上的临时文件进行处理 */
            Image srcFile = ImageIO.read(oldFile);

            String srcImgPath = newFile.getAbsoluteFile().toString();
            System.out.println(srcImgPath);
            String subfix = "jpg";
            subfix = srcImgPath.substring(srcImgPath.lastIndexOf(".")+1,srcImgPath.length());

            BufferedImage buffImg = null;
            if("png".equals(subfix)){
                buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
            }else{
                buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
            }

            Graphics2D graphics = buffImg.createGraphics();
            graphics.setBackground(new Color(255,255,255));
            graphics.setColor(new Color(255,255,255));
            graphics.fillRect(0, 0, width, height);
            graphics.drawImage(srcFile.getScaledInstance(width, height, Image.SCALE_SMOOTH), 0, 0, null);

            ImageIO.write(buffImg, subfix, new File(srcImgPath));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return newImage;
    }

    // 缓存文件头信息-文件头信息
    public static final HashMap<String, String> mFileTypes = new HashMap<String, String>();

    static {
        // images
        mFileTypes.put("FFD8FFE0", "jpg");
        mFileTypes.put("FFD8FFE1", "jpg");
        mFileTypes.put("89504E47", "png");
        mFileTypes.put("47494638", "gif");
        mFileTypes.put("49492A00", "tif");
        mFileTypes.put("424D", "bmp");
        //
        mFileTypes.put("41433130", "dwg"); // CAD
        mFileTypes.put("38425053", "psd");
        mFileTypes.put("7B5C727466", "rtf"); // 日记本
        mFileTypes.put("3C3F786D6C", "xml");
        mFileTypes.put("68746D6C3E", "html");
        mFileTypes.put("44656C69766572792D646174653A", "eml"); // 邮件
        mFileTypes.put("D0CF11E0", "doc");
        mFileTypes.put("D0CF11E0", "xls");//excel2003版本文件
        mFileTypes.put("5374616E64617264204A", "mdb");
        mFileTypes.put("252150532D41646F6265", "ps");
        mFileTypes.put("255044462D312E", "pdf");
        mFileTypes.put("504B0304", "docx");
        mFileTypes.put("504B0304", "xlsx");//excel2007以上版本文件
        mFileTypes.put("52617221", "rar");
        mFileTypes.put("57415645", "wav");
        mFileTypes.put("41564920", "avi");
        mFileTypes.put("2E524D46", "rm");
        mFileTypes.put("000001BA", "mpg");
        mFileTypes.put("000001B3", "mpg");
        mFileTypes.put("6D6F6F76", "mov");
        mFileTypes.put("3026B2758E66CF11", "asf");
        mFileTypes.put("4D546864", "mid");
        mFileTypes.put("1F8B08", "gz");
    }

    /**
     * @param inputStream 上传文件的流
     * @return 文件头信息
     * @author guoxk
     * <p>
     * 方法描述：根据文件路径获取文件头信息
     */
    public static String getFileType(InputStream inputStream) {
        return mFileTypes.get(getFileHeader(inputStream));
    }

    /**
     * @param inputStream 上传文件的流
     * @return 文件头信息
     * @author guoxk
     * <p>
     * 方法描述：根据文件路径获取文件头信息
     */
    public static String getFileHeader(InputStream inputStream) {
        String value = null;
        try {
            byte[] b = new byte[4];
            /*
             * int read() 从此输入流中读取一个数据字节。int read(byte[] b) 从此输入流中将最多 b.length
             * 个字节的数据读入一个 byte 数组中。 int read(byte[] b, int off, int len)
             * 从此输入流中将最多 len 个字节的数据读入一个 byte 数组中。
             */
            inputStream.read(b, 0, b.length);
            value = bytesToHexString(b);
        } catch (Exception e) {
        } finally {
            if (null != inputStream) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                }
            }
        }
        return value;
    }

    /**
     * @param src 要读取文件头信息的文件的byte数组
     * @return 文件头信息
     * @author guoxk
     * <p>
     * 方法描述：将要读取文件头信息的文件的byte数组转换成string类型表示
     */
    private static String bytesToHexString(byte[] src) {
        StringBuilder builder = new StringBuilder();
        if (src == null || src.length <= 0) {
            return null;
        }
        String hv;
        for (int i = 0; i < src.length; i++) {
            // 以十六进制（基数 16）无符号整数形式返回一个整数参数的字符串表示形式，并转换为大写
            hv = Integer.toHexString(src[i] & 0xFF).toUpperCase();
            if (hv.length() < 2) {
                builder.append(0);
            }
            builder.append(hv);
        }
//      System.out.println(builder.toString());
        return builder.toString();
    }
}
