using BuddyFinance.Integration.Models.Enums;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BuddyFinance.Common.Helpers
{
    public class IdentityNumber
    {
        public string Number { get; set; }
        public GenderEnum Gender { get; set; }
        public DateTime DateOfBirth { get; set; }

        public IdentityNumber(string idnumber)
        {
            if (string.IsNullOrEmpty(idnumber))
                throw new Exception("Invalid ID number");

            var number = idnumber.Replace(" ", "");

            if (number.Length != 13)
                throw new Exception("Invalid length for ID number");

            var year = int.Parse(idnumber.Substring(0, 2));
            var currentYear = DateTime.Now.Year % 100;

            var yearPrefix = "19";
            if (year < currentYear)
                yearPrefix = "20";

            var fullYear = yearPrefix + "" + year.ToString().PadLeft(2, '0');
            
            var dobpart = number.Substring(0, 6);
            //var residencypart = number.Substring(10, 1);

            //needs some attention 
            DateOfBirth = new DateTime(int.Parse(fullYear), int.Parse(dobpart.Substring(2, 2)), int.Parse(dobpart.Substring(4, 2)));
            
            //ToDate(dobpart);

            var genderpart = number.Substring(6, 4);
            Gender = int.Parse(genderpart) > 0 ? GenderEnum.Male : GenderEnum.Female;
            Number = number;
        }

       // private DateTime ToDate(string idNumberDOBPart)
       // {

         //   var date = int.Parse(idNumberDOBPart);

         //   string year1900temp =idNumberDOBPart.Substring(0,2);
         //   string year2000temp = idNumberDOBPart.Substring(0, 2);
         //   var yearval = Convert.ToInt32(year1900temp);

         //// validate date of birth for 2000 users

         //   int year = yearval < 10 ? (2000 + yearval) : (1900 + yearval);
         //   //int year = 1900+Convert.ToInt32(yeartemp);
         //   int month = (date / 100) % 100;
         //   int day = (date % 100);
         //   DateTime result = new DateTime(year, month, day);

         //   return result;
       // }
    }
}