using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.NetworkInformation;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Security.Policy;
using System.Management;
using System.Management.Instrumentation;



namespace KMBIM.Revit.Tools
{
    public class AuthKey
    {

        static decimal AUTH_CODE = 122;
        public decimal Cvt36To10(string s36)
        {
            var arrChar = s36.ToCharArray();
            
            string hex = s36;
            char ch;
            decimal dec;

            dec = 0;


            int len = arrChar.Count();
            for (int i = 1; i <= len; i++)
            {
                ch = arrChar[i - 1];

                if (ch >= 97 && ch <= 122) ch = (char)(Convert.ToInt64(ch) - 36);
                else if (ch > 122)
                {
                    // 영문 대문자로 변환
                    Int64 i64 = (Convert.ToInt64(ch) / 2);
                    while (i64 > 25)
                    {
                        i64 = i64 / 2;
                    }
                    i64 = i64 + 65;
                    ch = (char)i64;
                }
                else if ((ch<48 && ch > 57) || ch > 90)
                {
                    // 숫자로 변환
                    Int64 i64 = (Convert.ToInt64(ch) / 2);
                    while (i64 > 9)
                    {
                        i64 = i64 / 2;
                    }
                    i64 = i64 + 48;
                    ch = (char)i64;
                }
                
                
                dec = dec + array36(ch.ToString()) * (decimal)Math.Pow(36.0, (double)(len - i));
            }//end-for
            // s = string.Format("{0:f1}", dec);
            return dec;
        }



        public int array36(string val)
        {
            int retval = 0;

            string hexval = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
            for (int i = 0; i < 36; i++) if (hexval.Substring(i, 1) == val) { retval = i; break; }
            return retval;
        }

        public string Cvt10To36(string s10, ref string s36)
        {
            string hexval = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
            string temp = s10;
            double dec, mok;
            int r, i;
            string hex = string.Empty;

            i = 0;
            double.TryParse(temp, out dec);
            do
            {
                mok = Math.Floor(dec / 36.0);
                r = (int)(dec - mok * 36.0);
                hex += hexval[r];
                dec = mok;
                i++;
            } while (mok > 35);
            hex += hexval[(int)mok];
            //s36 = hex.ToCharArray().Reverse().ToArray().ToString();
            //s36 = hex.ToCharArray().Reverse().ToString();

            var charArray = hex.ToCharArray();
            Array.Reverse(charArray);
            var reversed = new string(charArray);
            s36 = reversed.ToString();

            return s36;
        }

        public string Cvt10To32(string s10, ref string s32)
        {
            string hexval = "0123456789ABCDEFGHIJKLMNOPQRSTUVW";
            string temp = s10;
            double dec, mok;
            int r, i;
            string hex = string.Empty;

            i = 0;
            double.TryParse(temp, out dec);
            do
            {
                mok = Math.Floor(dec / 32.0);
                r = (int)(dec - mok * 32.0);
                hex += hexval[r];
                dec = mok;
                i++;
            } while (mok > 31);
            hex += hexval[(int)mok];
            //s36 = hex.ToCharArray().Reverse().ToArray().ToString();
            //s36 = hex.ToCharArray().Reverse().ToString();

            var charArray = hex.ToCharArray();
            Array.Reverse(charArray);
            var reversed = new string(charArray);
            s32 = reversed.ToString();

            return s32;
        }


        public bool GetSerialNumber(ref string strSerialNumber)
        {
            string userName;
            bool bRC = false;
            string vvalue;
            strSerialNumber = string.Empty;
            vvalue = string.Empty;


            userName = System.Security.Principal.WindowsIdentity.GetCurrent().Name;


            string str1 = string.Empty;
            string str2 = string.Empty;
            string strVolume = GetVolume();


            if (userName != null)
            {


                if (string.IsNullOrEmpty(strVolume) == false) userName += strVolume;
                if (userName.Length > 1)
                {
                    userName = userName.Trim();
                    userName = userName.Replace(" ", "");
                    userName = userName.Replace("-", "");
                    userName = userName.Replace("\\", "");
                }
            }
            else return false; ;

          

            string strTmpSn = string.Empty;
            int j = 0;
            string strSn2 = string.Empty;
            string str32 = string.Empty;
            string str10 = string.Empty;
            // 일련번호를 8자리씩 끊어서 권한코드 생성
            for (int i = 0; i < userName.Length; i++)
            {
                if (j < 4)
                {
                    strSn2 += userName[i];
                }
                else
                {
                    str10 = string.Format("{0}", (int)this.Cvt36To10(strSn2));
                    strSerialNumber += this.Cvt10To32(str10, ref str32);
                    j = 0;
                    strSn2 = string.Empty;
                    continue;
                }
                j += 1;
            }
            if (strSn2.Length > 0)
            {
                str10 = string.Format("{0}", (int)this.Cvt36To10(strSn2));
                strSerialNumber += this.Cvt10To32(str10, ref str32);
            }


            bRC = true;
            return bRC;
        }

        // adapter info가 성공적으로 얻어지면 True를 넘겨준다.
        // 클래스를 이용하기 전에 이 함수를 호출하여야 한다.
        public bool IsValid()
        {
            return NetworkInterface.GetAllNetworkInterfaces().Count() < 1 ? false : true;
        }


        private int FindChar(string str, char ch)
        {
            int nInx = -1;
            for (int i = 0; i < str.Length; i++)
            {
                if (str[i] == ch)
                {
                    nInx = i;
                    break;
                }
            }
            return nInx;
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="authcodemeta">인증받은 권한코드(사용가능개월수포함)</param>
        /// <param name="authtypecode">인증유형</param>
        /// <param name="authcode">실제 사용되는 권한코드</param>
        /// <param name="monthcode">사용일수 또는 개월수(36진수)</param>
        public void ParseAuthCode(string authcodemeta, out char authtypecode, out string authcode, out string monthcode)
        {
            authtypecode = 'X';
            string AC = string.Empty;
            int nInx = FindChar(authcodemeta, 'Y');
            authcode = string.Empty;
            if (nInx != -1)
            {
                authtypecode = 'Y';
                AC = authcodemeta.Substring(nInx + 1, authcodemeta.Length - (nInx + 1));
                authcode = authcodemeta.Substring(0, nInx);

            }
            else
            {
                nInx = FindChar(authcodemeta, 'Z');
                if (nInx != -1)
                {
                    authtypecode = 'Z';
                    AC = authcodemeta.Substring(nInx + 1, authcodemeta.Length - (nInx + 1));
                    authcode = authcodemeta.Substring(0, nInx);

                }
            }
            monthcode = AC;
        }

        public void GetAuthCode2(string sn, int nAuthType, out string strAuthCode)
        {
            string strSn1;
            string strAuthTmp = string.Empty;
            strAuthCode = string.Empty;
            strSn1 = string.Format("{0}{1}", sn, nAuthType);
            int j = 0;
            string strSn2 = string.Empty;
            sn = strSn1.Clone().ToString();
            // 일련번호를 8자리씩 끊어서 권한코드 생성
            for (int i = 0; i < sn.Length; i++)
            {
                if (j < 8)
                {
                    strSn2 += sn[i];
                }
                else
                {
                    strAuthTmp = this.GetAuthCode(strSn2);
                    strAuthCode += strAuthTmp;
                    j = 0;
                    strSn2 = string.Empty;
                    continue;
                }
                j += 1;
            }
            if (strSn2.Length > 0)
            {
                strAuthTmp = this.GetAuthCode(strSn2);
                strAuthCode += strAuthTmp;
            }
        }


        public string GetVolume()
        {

            ManagementObject disk = new ManagementObject("Win32_LogicalDisk.DeviceID=\"" + "C:\"");
            //bind our management object
            disk.Get();
            //return the serial number
            return disk["VolumeSerialNumber"].ToString();
        }

        // 권한코드
        public string GetAuthCode(string serial_number)
        {
            string strAuthCode = string.Empty;
            string s10_1 = string.Empty, s10_2 = string.Empty;
            string str36 = string.Empty;


            int j = 0;
            string strSn2 = string.Empty;
            decimal decVal = 0;
            // 권한코드를 4자리씩 끊어서 권한코드 생성
            for (int i = 0; i < serial_number.Length; i++)
            {
                if (j < 4)
                {
                    strSn2 += serial_number[i];
                }
                else
                {
                    decVal = Cvt36To10(strSn2) * AUTH_CODE;
                    s10_1 = decVal.ToString();
                    strAuthCode += Cvt10To32(s10_1, ref str36);
                    j = 0;
                    strSn2 = string.Empty;
                    continue;
                }
                j += 1;
            }
            if (strSn2.Length > 0)
            {
                decVal = Cvt36To10(strSn2) * AUTH_CODE;
                s10_1 = decVal.ToString();
                strAuthCode += Cvt10To32(s10_1, ref str36);
            }
            return strAuthCode;
        }
    }
}