package com.future.dispatch.utils;
import android.util.Log;

import com.example.oktrip.netUtls.NetKitKt;

import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import cn.sinata.util.Base64DES;

public class DES {
	
	/*
	 * 不要写成：Cipher cipher = Cipher.getInstance("DES");
	 * 或：Cipher cipher = Cipher.getInstance("DES/CBC/NoPadding");
	 * 原因是Cipher cipher = Cipher.getInstance("DES");
	 * 与Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
	 * 等同，填充方式错误，加密的时候会得到16长度的字节数组。
	 * 应该写成
	 * Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
	 */


	
	private static final String KEY = "ForUApp=";

	private static byte[] iv = {25, 24, 40, 41, 60, 68, 70, 97};
 
	
	/**
	 * 指定密钥加密
	 * @param encryptString		原文
	 * @param encryptKey		密钥
	 * @return					密文
	 * @throws Exception
	 */
	public static String encryptDES(String encryptString, String encryptKey)
			throws Exception {

		IvParameterSpec zeroIv = new IvParameterSpec(iv);

		SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES");

		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");

		cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);

		byte[] encryptedData = cipher.doFinal(encryptString.getBytes());

		return Base64DES.encode(encryptedData);
	}
	
	/**
	 * 指定密钥进行解密
	 * @param decryptString		密文
	 * @param decryptKey		密钥
	 * @return					原文
	 * @throws Exception
	 */
	public static String decryptDES(String decryptString, String decryptKey)
			throws Exception {

		byte[] byteMi = Base64DES.decode(decryptString);

		IvParameterSpec zeroIv = new IvParameterSpec(iv);

		SecretKeySpec key = new SecretKeySpec(decryptKey.getBytes(), "DES");

		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");

		cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);

		byte decryptedData[] = cipher.doFinal(byteMi);

		return new String(decryptedData);

	}
	
	/**
	 * 默认密钥加密
	 * @param encryptString		原文
	 * @return					密文
	 * @throws Exception
	 */
	public static String encryptDES(String encryptString)
			throws Exception {

		IvParameterSpec zeroIv = new IvParameterSpec(iv);

		SecretKeySpec key = new SecretKeySpec(KEY.getBytes(), "DES");

		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");

		cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);

		byte[] encryptedData = cipher.doFinal(encryptString.getBytes());

		return Base64DES.encode(encryptedData);
	}
	
	/**
	 * 默认密钥解密
	 * @param decryptString		密文
	 * @return					解密得到的原文
	 * @throws Exception
	 */
	public static String decryptDES(String decryptString)
			throws Exception {

		byte[] byteMi = Base64DES.decode(decryptString);

		IvParameterSpec zeroIv = new IvParameterSpec(iv);

		SecretKeySpec key = new SecretKeySpec(KEY.getBytes(), "DES");

		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");

		cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);

		byte decryptedData[] = cipher.doFinal(byteMi);

		return new String(decryptedData, "UTF-8");

	}
	
	public static String parseByte2HexStr(byte buf[]) {  
		StringBuffer sb = new StringBuffer();  
		for (int i = 0; i < buf.length; i++) {  
			String hex = Integer.toHexString(buf[i] & 0xFF);  
			if (hex.length() == 1) {  
				hex = '0' + hex;  
			}  
			sb.append(hex.toUpperCase());  
		}  
		return sb.toString();  
	}

	public static void main(String[] args) {
		String plaintext = "server=/app/public/getCostSet?type=1";
		try {
			System.out.println("明文：" + plaintext);
			System.out.println("密钥：" + KEY);
			System.out.println("DES密文：" + DES.encryptDES(plaintext));
			System.out.println("DES解密"+DES.decryptDES(DES.encryptDES(plaintext)));

			System.out.println("URLEncoder加密"+URLEncoder.encode(DES.encryptDES(plaintext),"UTF-8"));
			System.out.println("URLEncoder解密"+URLDecoder.decode(URLEncoder.encode(DES.encryptDES(plaintext),"UTF-8"), "UTF-8"));

		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 生成签名
	 * @param map
	 * @return
	 */
	public static String getSign(Map<String, Object> map) {

		String result = "";
		try {
			List<Map.Entry<String, Object>> infoIds = new ArrayList<>(map.entrySet());
			// 对所有传入参数按照字段名的 ASCII 码从小到大排序（字典序）
			Collections.sort(infoIds, (o1, o2) -> (o1.getKey()).compareTo(o2.getKey()));
			// 构造签名键值对的格式
			StringBuilder sb = new StringBuilder();
			for (Map.Entry<String, Object> item : infoIds) {
				if (item.getKey() == null) {
					item.getKey();
				}
				String key = item.getKey();
				Object val = item.getValue();
				if (!(val == "" || val == null)) {
					sb.append(key).append("=").append(val).append("&");
				}
			}
			result = sb.toString();
			result = result.substring(0,result.length() - 1);
			Log.i("getSign====", "getSign: ==="+result);
			Log.i("getSign====", "AppId: ==="+ NetKitKt.getAppId());
			result = Base64DES.encode(HMACSHA1.HmacSHA1Encrypt(result, NetKitKt.getAppId()));
			//进行MD5加密
		} catch (Exception e) {
			return null;
		}
		return result;
	}
}