using System;
using System.Data;
using System.Data.SqlClient;
using JetBrains.Annotations;

namespace SDA.DataProvider.MSSQLWrappers
{
    /// <summary>
    /// Microsoft SQL Server alapú bulk insert implementáció.
    /// </summary>
    public class MSSQLBulkAdapter : SDABulkAdapter
    {
        private readonly SqlBulkCopy bulkCopy;

        /// <summary>
        /// Létrehoz egy Microsoft SQL Server specifikus bulk adapter példányt.
        /// </summary>
        /// <param name="bulkCopy">Egy SQL Server SqlBulkCopy példány, a
        /// tényleges bulk implementáció.</param>
        /// <exception cref="ArgumentNullException">Ha a kapott paraméter null.
        /// </exception>
        internal MSSQLBulkAdapter([NotNull] SqlBulkCopy bulkCopy)
        {
            if (bulkCopy == null)
            {
                throw new ArgumentNullException(nameof(bulkCopy));
            }
            this.bulkCopy = bulkCopy;
        }

        /// <inheritdoc />
        public override void BulkInsert(DataTable source)
        {
            if (string.IsNullOrWhiteSpace(source.TableName))
            {
                throw new ArgumentException("TableName property must be set to the target table name", nameof(source));
            }

            if (source.Columns.Count == 0)
            {
                throw new ArgumentException("should contain at least 1 column to bulk insert", nameof(source));
            }

            if (source.Rows.Count == 0)
            {
                return;
            }

            bulkCopy.DestinationTableName = source.TableName;
            bulkCopy.WriteToServer(source);

            //bulkCopy.NotifyAfter = 1000;
            //bulkCopy.SqlRowsCopied += (sender, args) =>
            //{

            //};
        }
    }
}