using Opc.Ua;

namespace ZB.MOM.WW.OtOpcUa.Host.Historian
{
    /// <summary>
    ///     Maps OPC UA aggregate NodeIds to the Wonderware Historian AnalogSummary column names
    ///     consumed by the historian plugin. Kept in Host so HistoryReadProcessed can validate
    ///     aggregate support without requiring the plugin to be loaded.
    /// </summary>
    public static class HistorianAggregateMap
    {
        public static string? MapAggregateToColumn(NodeId aggregateId)
        {
            if (aggregateId == ObjectIds.AggregateFunction_Average)
                return "Average";
            if (aggregateId == ObjectIds.AggregateFunction_Minimum)
                return "Minimum";
            if (aggregateId == ObjectIds.AggregateFunction_Maximum)
                return "Maximum";
            if (aggregateId == ObjectIds.AggregateFunction_Count)
                return "ValueCount";
            if (aggregateId == ObjectIds.AggregateFunction_Start)
                return "First";
            if (aggregateId == ObjectIds.AggregateFunction_End)
                return "Last";
            if (aggregateId == ObjectIds.AggregateFunction_StandardDeviationPopulation)
                return "StdDev";
            return null;
        }
    }
}