package com.genersoft.iot.vmp.netty.util;


import java.nio.ByteBuffer;

import static com.genersoft.iot.vmp.netty.config.MyDecoder.hexToByte;
import static com.genersoft.iot.vmp.netty.config.MyDecoder.hexTohort;

public class Hex {
    /**
     * 用于建立十六进制字符的输出的小写字符数组
     */
    private static final char[] DIGITS_LOWER = {'0', '1', '2', '3', '4', '5',
            '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

    /**
     * 用于建立十六进制字符的输出的大写字符数组
     */
    private static final char[] DIGITS_UPPER = {'0', '1', '2', '3', '4', '5',
            '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};


    private static ByteBuffer buffer = ByteBuffer.allocate(8);

    /**
     * 字符串转换成十六进制字符串
     *
     * @param str 待转换的ASCII字符串
     * @return String 每个Byte之间空格分隔，如: [61 6C 6B]
     */
    public static String str2HexStr(String str) {

        char[] chars = "0123456789ABCDEF".toCharArray();
        StringBuilder sb = new StringBuilder("");
        byte[] bs = str.getBytes();
        int bit;

        for (int i = 0; i < bs.length; i++) {
            bit = (bs[i] & 0x0f0) >> 4;
            sb.append(chars[bit]);
            bit = bs[i] & 0x0f;
            sb.append(chars[bit]);
            sb.append(' ');
        }
        return sb.toString().trim();
    }

    /**
     * 十六进制转换字符串
     *
     * @param hexStr Byte字符串(Byte之间无分隔符 如:[616C6B])
     * @return String 对应的字符串
     */
    public static String hexStr2Str(String hexStr) {
        String str = "0123456789ABCDEF";
        char[] hexs = hexStr.toCharArray();
        byte[] bytes = new byte[hexStr.length() / 2];
        int n;

        for (int i = 0; i < bytes.length; i++) {
            n = str.indexOf(hexs[2 * i]) * 16;
            n += str.indexOf(hexs[2 * i + 1]);
            bytes[i] = (byte) (n & 0xff);
        }
        return new String(bytes);
    }

    /**
     * bytes转换成十六进制字符串
     *
     * @param b byte数组
     * @return String 每个Byte值之间空格分隔
     */
    public static String byte2HexStr(byte[] b) {
        String stmp = "";
        StringBuilder sb = new StringBuilder("");
        for (int n = 0; n < b.length; n++) {
            stmp = Integer.toHexString(b[n] & 0xFF);
            sb.append((stmp.length() == 1) ? "0" + stmp : stmp);
//			sb.append(" ");
        }
        return sb.toString().toUpperCase().trim();
    }


    /**
     * bytes字符串转换为Byte值
     *
     * @param src Byte字符串，每个Byte之间没有分隔符
     * @return byte[]
     */
    public static byte[] hexStr2Bytes(String src) {
        int m = 0, n = 0;
        int l = src.length() / 2;
        System.out.println(l);
        byte[] ret = new byte[l];
        for (int i = 0; i < l; i++) {
            m = i * 2 + 1;
            n = m + 1;
            String tmp = "0x" + src.substring(i * 2, m) + src.substring(m, n);
            ret[i] = Byte.decode(tmp);
        }
        return ret;
    }

    /**
     * bytes字符串转换为Byte值
     *
     * @param hexString
     * @return
     */
    public static byte[] hexToBytes(String hexString) {
        if (hexString == null || hexString.equals("")) {
            return null;
        }

        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] bytes = new byte[length];
//        String hexDigits = "0123456789abcdefABCDEF";
        String hexDigits = "0123456789abcdef";
        for (int i = 0; i < length; i++) {
            int pos = i * 2; // 两个字符对应一个byte
            int h = hexDigits.indexOf(hexChars[pos]) << 4; // 注1
            int l = hexDigits.indexOf(hexChars[pos + 1]); // 注2
            if (h == -1 || l == -1) { // 非16进制字符
                return null;
            }
            bytes[i] = (byte) (h | l);
        }
        return bytes;
    }

    /**
     * String的字符串转换成unicode的String
     *
     * @param strText 全角字符串
     * @return String 每个unicode之间无分隔符
     * @throws Exception
     */
    public static String strToUnicode(String strText) throws Exception {
        char c;
        StringBuilder str = new StringBuilder();
        int intAsc;
        String strHex;
        for (int i = 0; i < strText.length(); i++) {
            c = strText.charAt(i);
            intAsc = (int) c;
            strHex = Integer.toHexString(intAsc);
            if (intAsc > 128)
                str.append("\\u" + strHex);
            else
                // 低位在前面补00
                str.append("\\u00" + strHex);
        }
        return str.toString();
    }

    /**
     * unicode的String转换成String的字符串
     *
     * @param hex 16进制值字符串 （一个unicode为2byte）
     * @return String 全角字符串
     */
    public static String unicodeToString(String hex) {
        int t = hex.length() / 6;
        StringBuilder str = new StringBuilder();
        for (int i = 0; i < t; i++) {
            String s = hex.substring(i * 6, (i + 1) * 6);
            // 高位需要补上00再转
            String s1 = s.substring(2, 4) + "00";
            // 低位直接转
            String s2 = s.substring(4);
            // 将16进制的string转为int
            int n = Integer.valueOf(s1, 16) + Integer.valueOf(s2, 16);
            // 将int转换为字符
            char[] chars = Character.toChars(n);
            str.append(new String(chars));
        }
        return str.toString();
    }


    /**
     * 将字节数组转换为十六进制字符数组
     *
     * @param data byte[]
     * @return 十六进制char[]
     */
    public static char[] encodeHex(byte[] data) {
        return encodeHex(data, true);
    }

    /**
     * 将字节数组转换为十六进制字符数组
     *
     * @param data        byte[]
     * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式
     * @return 十六进制char[]
     */
    public static char[] encodeHex(byte[] data, boolean toLowerCase) {
        return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
    }

    /**
     * 将字节数组转换为十六进制字符数组
     *
     * @param data     byte[]
     * @param toDigits 用于控制输出的char[]
     * @return 十六进制char[]
     */
    protected static char[] encodeHex(byte[] data, char[] toDigits) {
        int l = data.length;
        char[] out = new char[l << 1];
        // two characters form the hex value.
        for (int i = 0, j = 0; i < l; i++) {
            out[j++] = toDigits[(0xF0 & data[i]) >>> 4];
            out[j++] = toDigits[0x0F & data[i]];
        }
        return out;
    }

    /**
     * 将字节数组转换为十六进制字符串
     *
     * @param data byte[]
     * @return 十六进制String
     */
    public static String encodeHexStr(byte[] data) {
        return encodeHexStr(data, true);
    }

    /**
     * 将字节数组转换为十六进制字符串
     *
     * @param data        byte[]
     * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式
     * @return 十六进制String
     */
    public static String encodeHexStr(byte[] data, boolean toLowerCase) {
        return encodeHexStr(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
    }

    /**
     * 将字节数组转换为十六进制字符串
     *
     * @param data     byte[]
     * @param toDigits 用于控制输出的char[]
     * @return 十六进制String
     */
    protected static String encodeHexStr(byte[] data, char[] toDigits) {
        return new String(encodeHex(data, toDigits));
    }

    /**
     * 将十六进制字符数组转换为字节数组
     *
     * @param data 十六进制char[]
     * @return byte[]
     * @throws RuntimeException 如果源十六进制字符数组是一个奇怪的长度，将抛出运行时异常
     */
    public static byte[] decodeHex(char[] data) {

        int len = data.length;

        if ((len & 0x01) != 0) {
            throw new RuntimeException("Odd number of characters.");
        }

        byte[] out = new byte[len >> 1];

        // two characters form the hex value.
        for (int i = 0, j = 0; j < len; i++) {
            int f = toDigit(data[j], j) << 4;
            j++;
            f = f | toDigit(data[j], j);
            j++;
            out[i] = (byte) (f & 0xFF);
        }

        return out;
    }

    /**
     * 将十六进制字符转换成一个整数
     *
     * @param ch    十六进制char
     * @param index 十六进制字符在字符数组中的位置
     * @return 一个整数
     * @throws RuntimeException 当ch不是一个合法的十六进制字符时，抛出运行时异常
     */
    protected static int toDigit(char ch, int index) {
        int digit = Character.digit(ch, 16);
        if (digit == -1) {
            throw new RuntimeException("Illegal hexadecimal character " + ch
                    + " at index " + index);
        }
        return digit;
    }

    /**
     * float -> byte[]
     *
     * @param data
     * @return
     */
    public static byte[] getBytes(float data) {
        int intBits = Float.floatToIntBits(data);
        return intToByteArray(intBits);
    }

    /**
     * double -> byte[]
     *
     * @param data
     * @return
     */
    public static byte[] getBytes(double data) {
        long longBits = Double.doubleToLongBits(data);
        return longToBytes(longBits);
    }

    /**
     * byte[] -> float
     *
     * @param bytes
     * @return
     */
    public static float getFloat(byte[] bytes) {
        return Float.intBitsToFloat(getInt(bytes));
    }

    public static int getInt(byte[] bytes) {
        return (0xff & bytes[0]) | (0xff00 & (bytes[1] << 8)) | (0xff0000 & (bytes[2] << 16)) | (0xff000000 & (bytes[3] << 24));
    }

    /**
     * byte[] -> double
     *
     * @return
     */
    public static double getDouble(byte[] b) {
        long l;
        l = b[0];
        l &= 0xff;
        l |= ((long) b[1] << 8);
        l &= 0xffff;
        l |= ((long) b[2] << 16);
        l &= 0xffffff;
        l |= ((long) b[3] << 24);
        l &= 0xffffffffL;
        l |= ((long) b[4] << 32);
        l &= 0xffffffffffL;
        l |= ((long) b[5] << 40);
        l &= 0xffffffffffffL;
        l |= ((long) b[6] << 48);
        l &= 0xffffffffffffffL;
        l |= ((long) b[7] << 56);
        return Double.longBitsToDouble(l);
    }

    /**
     * 字节数组字符串 -> double
     *
     * @param bytesStr
     * @return
     */
    public static double getDouble(String bytesStr) {
        byte[] aa = hexToBytes(bytesStr.toLowerCase());
        return getDouble(aa);
    }


    /**
     * 字节数组字符串 -> float
     *
     * @param bytesStr
     * @return
     */
    public static float getFloat(String bytesStr) {
        byte[] aa = hexToBytes(bytesStr.toLowerCase());

        return getFloat(aa);
    }

    /**
     * 16进制字符串 -> byte数组
     */
    public static byte[] str16ToByte(String str16) {

        int len = str16.length();
        if (len % 2 > 0) {
            return null;
        }

        byte res[] = new byte[len / 2];

        for (int i = 0; i < len / 2; i++) {
            String tmp = str16.substring(i*2, (i + 1) * 2);
            byte t[] = hexToBytes(tmp);
            res[i] = t[0];
        }
        return res;
    }


    public static void main(String args[]) throws Exception {
        String aa = "AAAACCCC220000000033373933343732393100000000000000000000000052D50451F77D5D406C04E275FD723C400000015F0000000507E70306103B0A";

        String substring = aa.substring(20, 60);
        String substring1 = aa.substring(60, 76);
        String substring2 = aa.substring(76, 92);
        // 编号
        String a1 = "AAAACCCC2200000000333739333437323931000000000000000000000000";

        // 编号
        String a2 = "3739333437323931000000000000000000000000";
        System.out.println("a2 = " + hexStr2Str(a2));

        //经
        String lng = "52D50451F77D5D40";
        System.out.println("lng = " + getDouble(lng));

        String lat = "6C04E275FD723C40";
        System.out.println("lat = " + getDouble(lat));

        //日
        String str = "0000";
        System.out.println("a = " + hexTohort(str));


        String str1 = "015F";
        System.out.println("b = " + hexTohort(str1));

        //日
        String str2 = "0000";
        System.out.println("c = " + hexTohort(str2));


        String str3 = "0005";
        System.out.println("tr3 = " + hexTohort(str3));


        String nian = "07E7";
        System.out.println("nian = " + hexTohort(nian));

        String yue = "03";
        System.out.println("yue = " + hexToByte(yue));

        String ri = "06";
        System.out.println("ri = " + hexToByte(ri));

        String h = "10";
        System.out.println("h = " + hexToByte(h));

        String f = "3B";
        System.out.println("f = " + hexToByte(f));

        String m = "0A";
        System.out.println("m = " + hexToByte(m));

    }

    public static int toshort(String str) {
        char[] in = str.toCharArray();
        /*
         * for(int i=0;i<in.length;i+=2) { int value= tohx16(in[i]); int value2=
         * tohx16(in[i+1]); int value3=value<<4|value2;
         *
         * System.out.print(value3); }//这里可设计照规则进行转换
         */
        int j = 0;

        for(int i=0;i<in.length;i+=2) {
            int value= tohx16(in[i]);
            int value2=tohx16(in[i+1]);
            j=value<<4|value2;
        }
        return j;
    }



    public static int tohx16(char str) {
        switch (str) {
            case '0':
                return 0;
            case '1':
                return '1';
            case '2':
                return 2;
            case '3':
                return 3;
            case '4':
                return 4;
            case '5':
                return 5;
            case '6':
                return 6;
            case '7':
                return 7;
            case '8':
                return 8;
            case '9':
                return 9;
            case 'a':
            case 'A':
                return 10;
            case 'b':
            case 'B':
                return 11;
            case 'c':
            case 'C':
                return 12;
            case 'd':
            case 'D':
                return 13;
            case 'e':
            case 'E':
                return 14;
            case 'f':
            case 'F':
                return 15;

        }

        return 0;
    }

    public static byte[] intToByteArray(int a) {
        return new byte[]{
                (byte) ((a >> 24) & 0xFF),
                (byte) ((a >> 16) & 0xFF),
                (byte) ((a >> 8) & 0xFF),
                (byte) (a & 0xFF)
        };
    }

    public static byte intToByte(int a) {
        return (byte) (a & 0xFF);
    }

    public static byte[] longToBytes(long x) {
        buffer.putLong(0, x);
        return buffer.array();
    }


}