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package com.clickntap.api;

import com.clickntap.utils.ConstUtils;
import com.clickntap.utils.SecurityUtils;

public class CryptoUtils {
  private String key = "JYdM3AsUWaegpIqykYrmLPiUuJYtWT9Hosg9R10yH8o=";

  public String getKey() {
    return key;
  }

  public void setKey(String key) {
    this.key = key;
  }

  public String encrypt(String s) throws Exception {
    byte[] bytes = SecureUtils.base64dec(key);
    byte[] encoded = SecurityUtils.encrypt(s.getBytes(), bytes);
    s = SecureUtils.base64enc(encoded);
    s = convertStringToHex(s);
    return s;
  }

  public String md5(String s) throws Exception {
    return SecurityUtils.md5(s);
  }

  public String decrypt(String s) throws Exception {
    s = convertHexToString(s);
    byte[] decoded = SecurityUtils.decrypt(SecureUtils.base64dec(s), SecureUtils.base64dec(key));
    return new String(decoded, ConstUtils.UTF_8);
  }

  public static String convertStringToHex(String str) {
    char[] chars = str.toCharArray();
    StringBuffer hex = new StringBuffer();
    for (int i = 0; i < chars.length; i++) {
      hex.append(Integer.toHexString((int) chars[i]));
    }
    return hex.toString();
  }

  public static String convertHexToString(String hex) {
    StringBuilder sb = new StringBuilder();
    StringBuilder temp = new StringBuilder();
    for (int i = 0; i < hex.length() - 1; i += 2) {
      String output = hex.substring(i, (i + 2));
      int decimal = Integer.parseInt(output, 16);
      sb.append((char) decimal);
      temp.append(decimal);
    }
    return sb.toString();
  }

  public static void main(String args[]) throws Exception {
    {
      System.out.println(new CryptoUtils().getKey());
      String s = "K192346306";
      System.out.println(s);
      System.out.println(s = new CryptoUtils().encrypt(s));
      System.out.println(new CryptoUtils().decrypt(s));
    }
    String key = "";
    // while (!key.startsWith("")) {
    CryptoUtils utils = new CryptoUtils();
    key = SecureUtils.base64enc(SecurityUtils.generateKey(256).getEncoded());
    utils.setKey(key);
    System.out.println("key=" + utils.getKey());
    String s = "K192346306";
    System.out.println(s);
    System.out.println(s = utils.encrypt(s));
    System.out.println(utils.decrypt(s));
    // }
  }

}