using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using AnHuiMI.Common;
using Newtonsoft.Json.Linq;
//using GMUtilLib;
using PTMedicalInsurance.Variables;

namespace PTMedicalInsurance.Helper
{
    class EncryptHelper
    {

        private string appSecret = "1H1INA1L90OH3F60C80A00008119D616";
        private string appid = "1H1INA1L30OG3F60C80A0000DEE43558";
        public string encrypt(string data)
        {
            string encryptData = "";
            try
            { 
                SM4Utils sm4 = new SM4Utils();
                string newKey = sm4.Encrypt_ECB(appSecret,appid);
                encryptData = sm4.Encrypt_ECB(data,newKey.Substring(0,32));
                return encryptData;
            }
            catch (Exception ex)
            {
                encryptData = ex.Message;
                return encryptData;
            }
            finally
            {
                Global.writeLog(";appid:" + appid,data,encryptData);
            }
        }

        public string sign(string data)
        {
            string encryptData = "";
            try
            {
                SM4Utils sm4 = new SM4Utils();
                string newKey = sm4.Encrypt_ECB(appSecret, appid);
                encryptData = sm4.Decrypt_ECB(data, newKey.Substring(0, 32));
                return encryptData;
            }
            catch (Exception ex)
            {
                encryptData = ex.Message;
                return encryptData;
            }
            finally
            {
                Global.writeLog(";appid:" + appid, data, encryptData);
            }
        }

        public string signWithSM2(JObject obj)
        {
            JObject joSign = JObject.Parse(JsonHelper.toJsonString(obj));
            Global.writeLog("去除空值:" + joSign.ToString());

            string data = sortKeys(joSign);
            Global.writeLog("排序:"+data);

            data += appSecret;
            Global.writeLog("加secret:" + data);

            Sm2Crypto crypto = new Sm2Crypto();
            string publicKey = "BPwaiORlFqBIiMMTyeATozdSsLCxlGa/8ouTosiHKKmVeSnSWRgdIHOEXzyCVQlRzPCsKB24ZA4E3G8t9biN1E=", privateKey = "APCIAgJqh3+AcK/IXL1WJD130i2q+6UblRxQzus3+sVw";
            //Sm2Crypto.GetKey(out privateKey, out publicKey);

            crypto.PublicKey = publicKey;
            crypto.PrivateKey = privateKey;

            crypto.Str = data;
            string ret = crypto.Encrypt();
            // base64
            return Convert.ToBase64String(Encoding.UTF8.GetBytes(ret));
        }

        public string sortKeys(JObject obj) {

            StringBuilder sb = new StringBuilder();
            Dictionary<string, string> dict = new Dictionary<string, string>();
            foreach (var p in obj.Properties())
            {
                dict.Add(p.Name, p.Value.ToString());
            }
            string[] keys = dict.Keys.ToArray();
            Array.Sort(keys, string.CompareOrdinal);
            foreach (var k in keys)
            {
                if (sb.Length > 1)
                {
                    sb.Append("&");
                }
                sb.Append(k);
                sb.Append("=");
                sb.Append(dict[k]);
            }
            return sb.ToString();
        }
        public int verify(string data,string encryptData)
        {
            string error ="";
            try
            {
                //if (GMUtilLib.SignUtil.verifySm3WithSm2(data, ak, encryptData, sk))
                //{
                //    return 0;
                //}
                //else
                //{
                //    return -1;
                //}
                return 0;
            }
            catch (Exception ex)
            {
                error = ex.Message;
                return -1;
            }
            finally
            {
                Global.writeLog(";appid:" + appid, data + ";" + encryptData, error);
            }
        }

        public string decrypt(string encryptData)
        {
            string data = "";
            try
            {
                //string newKey = SM4.Encrypt(appSecret, appid)?.Substring(0, 32);
                //encryptData = SM4.Decrypt(encryptData, newKey);

                //data = GMUtilLib.SignUtil.decryptMsg(ak, sk, encryptData);
                return data;
            }
            catch (Exception ex)
            {
                data = ex.Message;
                return data;
            }
            finally
            {
                Global.writeLog(";appid:" + appid, encryptData, data);
            }
        }
    }
}