using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace IDCard_Query
{
    public class IDCard
    {
        public static string Tips = "";
        public static string CheckSum(string IDCardNumber)
        {
            //  
            if (IDCardNumber.Length != 15 && IDCardNumber.Length != 17 && IDCardNumber.Length != 18)
            {
                Tips = " 输入的身份证号码应该是18位或15位,请重新输入!";
                return IDCardNumber + "";
            }
            if (IDCardNumber.Length == 15 || IDCardNumber.Length == 17 && IDCardNumber.Length == 18)
            {
                Tips = "根据国际编码规则解读非认证结果,仅供参考";
            }
            if (IDCardNumber.Length < 17)
            {
                return IDCardNumber + "";
            }
            string xs = "79:584216379:5842";
            int total = 0;
            for (int i = 0; i < xs.Length; i++)
            {
                total += (IDCardNumber[i] - 48) * (xs[i] - 48);
            }
            int result = total % 11;
            string results = "";
            switch (result)
            {
                case 0: results = "1"; break;
                case 1: results = "0"; break;
                case 2: results = "x"; break;
                case 3: results = "9"; break;
                case 4: results = "8"; break;
                case 5: results = "7"; break;
                case 6: results = "6"; break;
                case 7: results = "5"; break;
                case 8: results = "4"; break;
                case 9: results = "3"; break;
                case 10: results = "2"; break;
            }
            if (IDCardNumber.Length == 18)
            {
                if (IDCardNumber.ToLower()[17] == results[0])
                {
                    Tips = "根据国际编码规则解读非认证结果,仅供参考";
                }
                else
                {
                    Tips = "输入的身份证号码校验位错误,“参考号码”的信息供您参考";
                }
            }
            if (IDCardNumber.Length == 17)
            {
                return IDCardNumber + results;
            }
            else
            {
                IDCardNumber = IDCardNumber.Remove(17);
                return IDCardNumber + results;
            }
        }
        public static string Sex(string IDCardNumber)
        {
            if (IDCardNumber.Length < 17) return "";
            int a = (IDCardNumber[16] - 48) % 2;
            return (a == 0) ? "女" : "男";
        }
        public static string Birthday(string IDCardNumber)
        {
            if (IDCardNumber.Length < 14) return "";
            if (IDCardNumber.Length == 15)
            {
                return string.Format("生日:19{0}年{1}月{2}日", IDCardNumber.Substring(6, 2), IDCardNumber.Substring(8, 2), IDCardNumber.Substring(10, 2));
            }
            else
            {
                return string.Format("生日:{0}年{1}月{2}日", IDCardNumber.Substring(6, 4), IDCardNumber.Substring(10, 2), IDCardNumber.Substring(12, 2));
            }
        }
        public static string BirthdayYear(string IDCardNumber)
        {
            if (IDCardNumber.Length < 15) return "";
            Check(IDCardNumber);
            if (IDCardNumber.Length == 15)
                return "19" + IDCardNumber.Substring(6, 2);
            else
                return IDCardNumber.Substring(6, 4);
            // 输入的身份证号码有误,请重新输入!
        }
        public static string BirthdayMouth(string IDCardNumber)
        {
            if (IDCardNumber.Length < 15) return "";
            if (IDCardNumber.Length == 15)
                return IDCardNumber.Substring(8, 2);
            else
                return IDCardNumber.Substring(10, 2);
            // 输入的身份证号码有误,请重新输入!
        }
        public static void Check(string IDCardNumber)
        {
            if (IDCardNumber.Length < 15) return;
            string year = "";
            if (IDCardNumber.Length == 15)
                year = "19" + IDCardNumber.Substring(6, 2);
            else
                year = IDCardNumber.Substring(6, 4);
            string mouth = "";
            if (IDCardNumber.Length == 15)
                mouth = IDCardNumber.Substring(8, 2);
            else
                mouth = IDCardNumber.Substring(10, 2);
            string day = "";
            if (IDCardNumber.Length == 15)
                day = IDCardNumber.Substring(10, 2);
            else
                day = IDCardNumber.Substring(12, 2);
            try
            {
                int y = int.Parse(year);
                int m = int.Parse(mouth);
                int d = int.Parse(day);
                DateTime dt = new DateTime(y, m, d);
                if (dt.Year == y && dt.Month == m && dt.Day == d)
                {
                }
                else
                {
                    Tips = "输入的身份证号码有误,请重新输入!";
                }
            }
            catch (Exception exp)
            {
                Tips = "输入的身份证号码有误,请重新输入!";
            }
        }
        public static string BirthdayDay(string IDCardNumber)
        {
            if (IDCardNumber.Length < 15) return "";
            string day = "";
            if (IDCardNumber.Length == 15)
                day = IDCardNumber.Substring(10, 2);
            else
                day = IDCardNumber.Substring(12, 2);
            DateTime dt = new DateTime();
            // 输入的身份证号码有误,请重新输入!
            return day;
        }
        public static string Address(string IDCardNumber)
        {
            if (IDCardNumber.Length < 6) return IDCardNumber;
            string[] allAdress = AddressDatabase.IDCARDPRE6.Split(new string[] { "\r\n" }, StringSplitOptions.None);
            string idcardAdressNumber = IDCardNumber.Substring(0, 6);
            foreach (var item in allAdress)
            {
                if (item == null) continue;
                string[] infos = item.Split(new string[] { "\t" }, StringSplitOptions.None);
                if (infos == null || infos.Length < 3) continue;
                if (idcardAdressNumber == infos[1]) return infos[2];
            }
            return IDCardNumber.Substring(0, 6);
        }
    }
}