///
/// Copyright (c) 2021 Sensus Slovensko a.s.
///
using System;
using System.ComponentModel.Composition;
using System.ComponentModel.Composition.Hosting;
using log4net;
using Config.Entities;
using DataStreamInterface;

namespace TBF.BenchControl.RegisterReaders.DataStream.MefImport
{
	/// <summary>
	/// MEF interface to an external data stream reader component.
	/// </summary>
	public class MefImport : ComponentBase
	{
        private static readonly ILog log = LogManager.GetLogger(typeof(MefImport));
        public override string ToString() { return string.Format("{0}({1})", ClassName, Cfg.ToString(-1)); }

        const Int64 MIN_SAMPLES_COUNT = 20;
        public Int64 MinSamplesCount { get { return MIN_SAMPLES_COUNT; } }


        [Import(typeof(IDataStreamMeter))]
        public IDataStreamMeter DataStreamIFace;


        readonly MefImportCfg myCfg;
		public string CatalogDir { get { return myCfg.CatalogDir; } }


		public MefImport() { }

		public MefImport(Generic.IComponentCfg cfg)
			: base(cfg)
		{
			myCfg = cfg as MefImportCfg;
        }

        public override void Initialize()
        {
            if (DebugLevel == DebugMode.Normal)
            {
                var catalog = new AggregateCatalog();
                catalog.Catalogs.Add(new AssemblyCatalog(typeof(DataStreamInterface.IDataStreamMeter).Assembly));
                catalog.Catalogs.Add(new DirectoryCatalog(CatalogDir));
                (new CompositionContainer(catalog)).ComposeParts(this);

                log.FatalFormat("{0} initialized: {1}", Name, this);
                log.FatalFormat("   Meters count = {0}", DataStreamIFace.GetMetersCount());
                log.FatalFormat("   Time unit = {0}", DataStreamIFace.GetTimeUnits().ToString());
                log.FatalFormat("   Volume unit = {0}", DataStreamIFace.GetVolumeUnits().ToString());
                for (int i = 0; i < DataStreamIFace.GetQuantitiesCount(); i++)
                {
                    log.FatalFormat("   Quantity_{0} = {1}, unit = {2}", i + 1,
                                    DataStreamIFace.GetQuantityCaption(i),
                                    DataStreamIFace.GetQuantityUnits(i).ToString());
                }
            }
            else
            {
                log.FatalFormat("{0} simulated: {1}", Name, this);
            }
        }
    }
}