using FreeSql.Internal;
using FreeSql.Internal.Model;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace FreeSql.Custom.Oracle
{

    class CustomOracleUpdate<T1> : Internal.CommonProvider.UpdateProvider<T1>
    {

        public CustomOracleUpdate(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression, object dywhere)
            : base(orm, commonUtils, commonExpression, dywhere)
        {
        }

		public override int ExecuteAffrows() => base.SplitExecuteAffrows(_batchRowsLimit > 0 ? _batchRowsLimit : 200, _batchParameterLimit > 0 ? _batchParameterLimit : 999);
		protected override List<TReturn> ExecuteUpdated<TReturn>(IEnumerable<ColumnInfo> columns) => base.SplitExecuteUpdated<TReturn>(_batchRowsLimit > 0 ? _batchRowsLimit : 200, _batchParameterLimit > 0 ? _batchParameterLimit : 999, columns);

		protected override List<TReturn> RawExecuteUpdated<TReturn>(IEnumerable<ColumnInfo> columns) => throw new NotImplementedException($"FreeSql.Custom.Oracle {CoreStrings.S_Not_Implemented_Feature}");

		protected override void ToSqlCase(StringBuilder caseWhen, ColumnInfo[] primarys)
		{
			if (primarys.Length == 1)
			{
				var pk = primarys.First();
				caseWhen.Append(_commonUtils.RereadColumn(pk, _commonUtils.QuoteSqlName(pk.Attribute.Name)));
				return;
			}
			caseWhen.Append("(");
			var pkidx = 0;
			foreach (var pk in primarys)
			{
				if (pkidx > 0) caseWhen.Append(" || '+' || ");
				caseWhen.Append(_commonUtils.RereadColumn(pk, _commonUtils.QuoteSqlName(pk.Attribute.Name)));
				++pkidx;
			}
			caseWhen.Append(")");
		}

		protected override void ToSqlWhen(StringBuilder sb, ColumnInfo[] primarys, object d)
		{
			if (primarys.Length == 1)
			{
				if (primarys[0].Attribute.DbType.Contains("NVARCHAR2"))
					sb.Append("N");
				sb.Append(_commonUtils.FormatSql("{0}", primarys[0].GetDbValue(d)));
				return;
			}
			sb.Append("(");
			var pkidx = 0;
			foreach (var pk in primarys)
			{
				if (pkidx > 0) sb.Append(" || '+' || ");
				sb.Append(_commonUtils.FormatSql("{0}", pk.GetDbValue(d)));
				++pkidx;
			}
			sb.Append(")");
		}

#if net40
#else
        public override Task<int> ExecuteAffrowsAsync(CancellationToken cancellationToken = default) => base.SplitExecuteAffrowsAsync(_batchRowsLimit > 0 ? _batchRowsLimit : 200, _batchParameterLimit > 0 ? _batchParameterLimit : 999, cancellationToken);
		protected override Task<List<TReturn>> ExecuteUpdatedAsync<TReturn>(IEnumerable<ColumnInfo> columns, CancellationToken cancellationToken = default) => base.SplitExecuteUpdatedAsync<TReturn>(_batchRowsLimit > 0 ? _batchRowsLimit : 200, _batchParameterLimit > 0 ? _batchParameterLimit : 999, columns, cancellationToken);

		protected override Task<List<TReturn>> RawExecuteUpdatedAsync<TReturn>(IEnumerable<ColumnInfo> columns, CancellationToken cancellationToken = default) => throw new NotImplementedException($"FreeSql.Custom.Oracle {CoreStrings.S_Not_Implemented_Feature}");
#endif
	}
}