using Opc.Ua;
using Shouldly;
using Xunit;
using ZB.MOM.WW.LmxOpcUa.Host.Historian;

namespace ZB.MOM.WW.LmxOpcUa.Tests.Historian
{
    public class HistorianDataSourceTests
    {
        [Fact]
        public void MapAggregateToColumn_Average_ReturnsAverage()
        {
            HistorianDataSource.MapAggregateToColumn(ObjectIds.AggregateFunction_Average).ShouldBe("Average");
        }

        [Fact]
        public void MapAggregateToColumn_Minimum_ReturnsMinimum()
        {
            HistorianDataSource.MapAggregateToColumn(ObjectIds.AggregateFunction_Minimum).ShouldBe("Minimum");
        }

        [Fact]
        public void MapAggregateToColumn_Maximum_ReturnsMaximum()
        {
            HistorianDataSource.MapAggregateToColumn(ObjectIds.AggregateFunction_Maximum).ShouldBe("Maximum");
        }

        [Fact]
        public void MapAggregateToColumn_Count_ReturnsValueCount()
        {
            HistorianDataSource.MapAggregateToColumn(ObjectIds.AggregateFunction_Count).ShouldBe("ValueCount");
        }

        [Fact]
        public void MapAggregateToColumn_Start_ReturnsFirst()
        {
            HistorianDataSource.MapAggregateToColumn(ObjectIds.AggregateFunction_Start).ShouldBe("First");
        }

        [Fact]
        public void MapAggregateToColumn_End_ReturnsLast()
        {
            HistorianDataSource.MapAggregateToColumn(ObjectIds.AggregateFunction_End).ShouldBe("Last");
        }

        [Fact]
        public void MapAggregateToColumn_StdDev_ReturnsStdDev()
        {
            HistorianDataSource.MapAggregateToColumn(ObjectIds.AggregateFunction_StandardDeviationPopulation)
                .ShouldBe("StdDev");
        }

        [Fact]
        public void MapAggregateToColumn_Unsupported_ReturnsNull()
        {
            HistorianDataSource.MapAggregateToColumn(new NodeId(99999)).ShouldBeNull();
        }
    }
}