using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Security.Cryptography;
namespace PatientMan
{
    internal static class   common
    {
        public static DateTime testdate { get; set; }
        public static DateTime visitdate { get; set; }

        public static DateTime MaxDate(DateTime a, DateTime b)
        {
            return a > b ? a : b;
        }

        public static DateTime MinDate(DateTime a, DateTime b)
        {
            return a > b ? b : a;
        }

        public static string MD5Hash(string text)
        {
            MD5 md5 = new MD5CryptoServiceProvider();

            //compute hash from the bytes of text
            md5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(text));

            //get hash result after compute it
            byte[] result = md5.Hash;

            StringBuilder strBuilder = new StringBuilder();
            for (int i = 0; i < result.Length; i++)
            {
                //change it into 2 hexadecimal digits
                //for each byte
                strBuilder.Append(result[i].ToString("x2"));
            }

            return strBuilder.ToString();
        }

        public static int MonthDiff( DateTime EndDate,DateTime startDate)
        {
            int retVal = 0;

            if (startDate.Month < EndDate.Month)
            {
                retVal = (startDate.Month + 12) - EndDate.Month;
                retVal += ((startDate.Year - 1) - EndDate.Year) * 12;
            }
            else
            {
                retVal = startDate.Month - EndDate.Month;
                retVal += (startDate.Year - EndDate.Year) * 12;
            }
            //// Calculate the number of years represented and multiply by 12
            //// Substract the month number from the total
            //// Substract the difference of the second month and 12 from the total
            //retVal = (d1.Year - d2.Year) * 12;
            //retVal = retVal - d1.Month;
            //retVal = retVal - (12 - d2.Month);

            return retVal;
        }

        public static int GetQuarter(DateTime date)
        {
            if (date.Month >= 4 && date.Month <= 6)
                return 2;
            else if (date.Month >= 7 && date.Month <= 9)
                return 3;
            else if (date.Month >= 10 && date.Month <= 12)
                return 4;
            else
                return 1;

        }
    }
}