using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq;
using System.Web;
using WebLib;

namespace Education
{
    public class DAC_BWEX: DAC
    {
        private const string _tableName = "BWEX";
        private const string 領據關帳年月 = "領據關帳年月";

        public DAC_BWEX()
        { }

        public DAC_BWEX(DbConnection conn)
          : base(conn)
        { }

        /// <summary>
        /// 讀取設定
        /// </summary>
        /// <param name="bsnum"></param>
        /// <param name="bsitm"></param>
        /// <returns></returns>
        public string ReadSetting(string bsnum, int bsitm)
        {
            var cmd = NewCommand($"SELECT BSNAM FROM {_tableName} WHERE BSNUM=@BSNUM AND BSITM=@BSITM");
            AddParam(cmd, "BSNUM", bsnum);
            AddParam(cmd, "BSITM", $"{bsitm,4}");
            if (ExecuteScalar<string>(cmd, out string value))
            {
                return value;
            }
            else
            {
                return "";
            }
        }

        /// <summary>
        /// 寫入設定
        /// </summary>
        /// <param name="bsnum"></param>
        /// <param name="bsitm"></param>
        /// <param name="bsnam"></param>
        public void WriteSetting(string bsnum, int bsitm, string bsnam)
        {
            var cmdRead = NewCommand($"SELECT COUNT(*) FROM {_tableName} WHERE BSNUM=@BSNUM AND BSITM=@BSITM");
            AddParam(cmdRead, "BSNUM", bsnum);
            AddParam(cmdRead, "BSITM", $"{bsitm,4}");
            ExecuteScalar(cmdRead, out int count);

            if (count > 0)
            {
                var cmd = NewCommand($"UPDATE {_tableName} SET BSNAM=@BSNAM, TRDAT=@TRDAT, TRMOD=@TRMOD, TRUSR=@TRUSR WHERE BSNUM=@BSNUM AND BSITM=@BSITM");
                AddParam(cmd, "BSNAM", bsnam);
                AddParam(cmd, "TRDAT", DateTime.Now);
                AddParam(cmd, "TRMOD", "UPDATE");
                AddParam(cmd, "TRUSR", CurrentUserId);
                AddParam(cmd, "BSNUM", bsnum);
                AddParam(cmd, "BSITM", $"{bsitm,4}");
                ExecuteNonQuery(cmd);
            }
            else 
            {
                var cmd = NewCommand($"INSERT INTO {_tableName} (BSNUM, BSITM, BSNAM, TRDAT, TRMOD, TRUSR) VALUES (@BSNUM, @BSITM, @BSNAM, @TRDAT, @TRMOD, @TRUSR)");
                AddParam(cmd, "BSNUM", bsnum);
                AddParam(cmd, "BSITM", $"{bsitm,4}");
                AddParam(cmd, "BSNAM", bsnam);
                AddParam(cmd, "TRDAT", DateTime.Now);
                AddParam(cmd, "TRMOD", "INSERT");
                AddParam(cmd, "TRUSR", CurrentUserId);
                ExecuteNonQuery(cmd);
            }
        }

        public string Read領據關帳年月
        {
            get
            {
                using (var conn = DAC.NewConnection())
                {
                    var daoBWEX = new DAC_BWEX(conn);
                    return daoBWEX.ReadSetting(領據關帳年月, 1);
                }
            }
        }
    }
}