using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace bnhtrade.Core.Data.Database.Programmability
{
    public class Sequence : Connection
    {
        public Sequence ()
        {

        }
        public int GetNext(string sequenceName)
        {
            if (string.IsNullOrWhiteSpace(sequenceName))
            {
                throw new Exception("Sequence name is null or whitespace.");
            }

            using (SqlConnection conn = new SqlConnection(SqlConnectionString))
            {
                conn.Open();

                using (SqlCommand cmd = new SqlCommand(@"
                    SELECT NEXT VALUE FOR " + sequenceName 
                    , conn))
                {
                    //cmd.Parameters.AddWithValue("@sequenceName", sequenceName);
                    // it wouldn't let me use parameters

                    object obj = cmd.ExecuteScalar();

                    try
                    {
                        //string whaaaat =  (string)obj;
                        return Convert.ToInt32(obj);
                    }
                    catch (Exception ex)
                    {
                        throw new Exception("Error returning next value in sequence: " + ex.Message);
                    }
                }
            }
        }
    }
}