package com.hdl.sdk.link.common.utils;

import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

/**
 * Created by Tong on 2021/9/23.
 */
public class ByteUtils {

    public static byte[] toByteArray(List<Byte> list) {
        Byte[] temps = list.toArray(new Byte[0]);
        byte[] result = new byte[temps.length];
        for (int i = 0; i < result.length; i++) {
            result[i] = temps[i];
        }
        return result;

    }


    public static List<Byte> toByteList(byte[] bytes) {
        final List<Byte> list = new ArrayList<>();
        for (byte aByte : bytes) {
            list.add(aByte);
        }
        return list;

    }

    public static byte[] getRangeBytes(List<Byte> list, int start, int end) {
        Byte[] temps = Arrays.copyOfRange(list.toArray(new Byte[0]), start, end);
        byte[] result = new byte[temps.length];
        for (int i = 0; i < temps.length; i++) {
            result[i] = temps[i];
        }
        return result;

    }

    public static byte[] copyBytes(byte bytes[], int index, int length) {
        byte[] result = new byte[length];
        for (int i = 0; i < result.length; i++) {
            result[i] = bytes[index + i];
        }
        return result;
    }

    /**
     * 拼接byte
     */
    public static byte[] concatBytes(byte[] bt1, byte[] bt2) {
        if (bt1 == null) {
            return bt2;
        }
        if (bt2 == null) {
            return bt1;
        }
        byte[] bt3 = new byte[bt1.length + bt2.length];
        System.arraycopy(bt1, 0, bt3, 0, bt1.length);
        System.arraycopy(bt2, 0, bt3, bt1.length, bt2.length);
        return bt3;
    }


    public boolean endWith(Byte[] src, byte[] target) {
        if (src.length < target.length) {
            return false;
        }
        for (int i = 0; i < target.length; i++) {
            if (target[target.length - i - 1] != src[src.length - i - 1]) {
                return false;
            }
        }
        return true;
    }


    public static int byteIndexOf(byte[] searched, byte[] find, int start) {
        boolean matched;
        int end = find.length - 1;
        int skip = 0;
        for (int index = start; index <= searched.length - find.length; ++index) {
            matched = true;
            if (find[0] != searched[index] || find[end] != searched[index + end]) continue;
            else skip++;
            if (end > 10)
                if (find[skip] != searched[index + skip] || find[end - skip] != searched[index + end - skip])
                    continue;
                else skip++;
            for (int subIndex = skip; subIndex < find.length - skip; ++subIndex) {
                if (find[subIndex] != searched[index + subIndex]) {
                    matched = false;
                    break;
                }
            }
            if (matched) {
                return index;
            }
        }
        return -1;

    }

    public static int getByteIndexOf(byte[] sources, byte[] src) {
        return getByteIndexOf(sources, src, 0, sources.length);
    }

    //判断一个byte数值在另外一个byte数组中对应的游标值
    public static int getByteIndexOf(byte[] sources, byte[] src, int startIndex) {
        return getByteIndexOf(sources, src, startIndex, sources.length);
    }


    //判断一个byte数值在另外一个byte数组中对应的游标值，指定开始的游标和结束的游标位置
    public static int getByteIndexOf(byte[] sources, byte[] src, int startIndex, int endIndex) {

        if (sources == null || src == null || sources.length == 0 || src.length == 0) {
            return -1;
        }

        if (endIndex > sources.length) {
            endIndex = sources.length;
        }

        int i, j;
        for (i = startIndex; i < endIndex; i++) {
            if (sources[i] == src[0] && i + src.length < endIndex) {
                for (j = 1; j < src.length; j++) {
                    if (sources[i + j] != src[j]) {
                        break;
                    }
                }

                if (j == src.length) {
                    return i;
                }
            }
        }
        return -1;
    }

    /**
     * 字符串to Bytes
     *
     * @param str 字符串
     * @return
     */
    public static byte[] stringToBytes(String str) {
        try {
            // 使用指定的字符集将此字符串编码为byte序列并存到一个byte数组中
            return str.getBytes("utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return new byte[]{};
    }

    public static String byte2hex(byte[] bytes) {
        StringBuilder sb = new StringBuilder();
        String tmp = null;
        for (byte b : bytes) {
            //将每个字节与0xFF进行与运算，然后转化为10进制，然后借助于Integer再转化为16进制
            tmp = Integer.toHexString(0xFF & b);
            if (tmp.length() == 1) {
                tmp = "0" + tmp;
            }
            sb.append(tmp + " ");
        }
        return sb.toString();
    }


    public static int bytes2int(byte[] bytes) {
        return bytes[3] & 0xFF | //
                (bytes[2] & 0xFF) << 8 | //
                (bytes[1] & 0xFF) << 16 | //
                (bytes[0] & 0xFF) << 24; //
    }


    public static byte[] intToByteArray(int i) {
        byte[] result = new byte[4];
        result[0] = (byte) ((i >> 24) & 0xFF);
        result[1] = (byte) ((i >> 16) & 0xFF);
        result[2] = (byte) ((i >> 8) & 0xFF);
        result[3] = (byte) (i & 0xFF);
        return result;
    }

    public static int byteArrayToInt(byte[] b) {
        int i = (b[0] & 0xFF) * 256 * 256 * 256 + (b[1] & 0xFF) * 256 * 256 + (b[2] & 0xFF) * 256 + (b[3] & 0xFF);
        return i;
    }

    /**
     * 解密
     *
     * @param contentByte 待解密待字符串hexStr
     * @param contentByte 密钥
     * @return
     */
    public static byte[] decrypt(byte[] contentByte) {
        try {
            //KEY转换
            Key key = new SecretKeySpec("HDLRDCENTER1985.".getBytes(), "AES");
            //解密
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS7Padding");
            IvParameterSpec ivps = new IvParameterSpec("HDLRDCENTER1985.".getBytes());
            cipher.init(Cipher.DECRYPT_MODE, key, ivps);
            byte[] result = cipher.doFinal(contentByte);
            return result;
        } catch (NoSuchAlgorithmException e) {
            LogUtils.e(e.getMessage());
        } catch (InvalidKeyException e) {
            LogUtils.e(e.getMessage());
        } catch (NoSuchPaddingException e) {
            LogUtils.e(e.getMessage());
        } catch (BadPaddingException e) {
            LogUtils.e(e.getMessage());
        } catch (IllegalBlockSizeException e) {
            LogUtils.e(e.getMessage());
        } catch (InvalidAlgorithmParameterException e) {
            LogUtils.e(e.getMessage());
        }
        return null;
    }

}