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

namespace 報到系統
{
    public class DAC_BWEH: DAC
    {
        [DataObjectMethod(DataObjectMethodType.Select)]
        public NameValueList SelectByGroupId(string groupId)
        {
            if (string.IsNullOrEmpty(groupId))
                return null;

            DbCommand cmdSelect = NewCommand();
            cmdSelect.CommandText =
              @"select A.BPENO as Value, B.BPNME as Name
                from BWEH A
                join BPSNView B on A.BPENO=B.BPENO and B.BPEDY is null
                where A.BPGLP=@BPGLP 
                order by A.BPENO";
            AddParam(cmdSelect, "BPGLP", groupId);
            cmdSelect.CommandText += " ";

            var result = new NameValueList();
            var list = result as IDataList;
            Select(cmdSelect, ref list);
            return result;
        }

        [DataObjectMethod(DataObjectMethodType.Insert)]
        public bool AddMemberToGroup(string groupId, string employeeId)
        {
            if (string.IsNullOrEmpty(groupId) || string.IsNullOrEmpty(employeeId))
                return false;

            DbCommand cmd = NewCommand();
            cmd.CommandText = @"
                IF NOT EXISTS (SELECT 1 FROM BWEH WHERE BPGLP=@BPGLP AND BPENO=@BPENO)
                BEGIN
                    INSERT INTO BWEH (BPGLP, BPENO) VALUES (@BPGLP, @BPENO)
                END";
            AddParam(cmd, "BPGLP", groupId);
            AddParam(cmd, "BPENO", employeeId);
            
            int result = ExecuteNonQuery(cmd);
            return result >= 0;
        }

        [DataObjectMethod(DataObjectMethodType.Delete)]
        public bool RemoveMemberFromGroup(string groupId, string employeeId)
        {
            if (string.IsNullOrEmpty(groupId) || string.IsNullOrEmpty(employeeId))
                return false;

            DbCommand cmd = NewCommand();
            cmd.CommandText = @"DELETE FROM BWEH WHERE BPGLP=@BPGLP AND BPENO=@BPENO";
            AddParam(cmd, "BPGLP", groupId);
            AddParam(cmd, "BPENO", employeeId);
            
            int result = ExecuteNonQuery(cmd);
            return result > 0;
        }
    }
}