package com.ynxbd.common.helper.common;


import lombok.extern.slf4j.Slf4j;
import org.apache.commons.codec.binary.Hex;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;

/**
 * AES加密算法
 */
@Slf4j
public class AesHelper {

    private final static String KEY = "ynxbdysdssjtwrin";

    private final static String IV = "ynxbdqsdsbjtwrin";

    public static String enCode(String data) {
        return encryptHex(data, KEY, IV);
    }

    public static String deCode(String data) {
        return decryptHex(data, KEY, IV);
    }

    public static String decryptHex(String data, String key, String iv) {
        try {
            SecretKeySpec secretKey = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES");
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(iv.getBytes(StandardCharsets.UTF_8)));

            return new String(cipher.doFinal(Hex.decodeHex(data.toCharArray())));
        } catch (Exception e) {
            log.warn(e.getMessage());
            return null;
        }
    }

    /**
     * Aes加密算法( Hex)
     *
     * @param data 加密数据
     * @param key  密钥（16位）
     * @param iv   密钥偏移量
     * @return 加密后的数据
     */
    public static String encryptHex(String data, String key, String iv) {
        try {
            if (key == null || key.length() != 16) {
                throw new Exception("Key长度不是16位");
            }
            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); //"算法/模式/补码方式"
            cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "AES"), new IvParameterSpec(iv.getBytes()));
            byte[] encrypted = cipher.doFinal(data.getBytes());
            return Hex.encodeHexString(encrypted).toUpperCase();
        } catch (Exception e) {
            log.warn(e.getMessage());
            return null;
        }
    }

    public static void main(String[] args) throws Exception {
        //PACS 那边的 加解密密钥 key:cqmygysdssjtwmyd   iv:llyscysykryhsbjc

//        long beg = System.currentTimeMillis();
//        String encrypt = encryptHex("文字123", "wsqysqsdssjtwmyd", "xbzynydykkxxkkll");
//        System.out.println(encrypt);
//        long end = System.currentTimeMillis();
//
//        System.out.println(end - beg);
//        String a = decryptHex("111123", "wsqysqsdssjtwmyd", "xbzynydykkxxkkll");
//        System.out.println(a);
        System.out.println(enCode("weiMai"));
        System.out.println(deCode("4BCBEAAFDC5A36E7A5448FB4F471581E541FB64A336D3D83B30CFBD9B7959A4C"));

//        String encrypt = decryptHex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cqmygysdssjtwmyd", "llyscysykryhsbjc");
//        System.out.println(encrypt);
    }
}