using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Intel.Management.Wsman;

namespace Intel.Management.PSModule.Amt
{
    class ClockService : DriveContainer
    {
 

        public ClockService( DriveItem parent)
            : base("Clock", parent)
        {
        }

     

        public override void GetChildItems(ChildWriter writer)
        {
            
            DateTime standardTime = new DateTime(1970, 1, 1);
            IWsmanConnection conn = ((AmtRootService)GetRoot()).Connection;

            IManagedReference refToClock = conn.NewReference("AMT_TimeSynchronizationService");
            IManagedInstance inputObj = refToClock.CreateMethodInput("GetLowAccuracyTimeSynch");
            IManagedInstance outObj = refToClock.InvokeMethod(inputObj);

  
            uint ta0 = uint.Parse( outObj.GetProperty("Ta0").ToString());
            DateTime time = standardTime.AddSeconds(ta0);

         
            writer.Add(new DriveEntry("LocalTime", time.ToLocalTime(), this));
            writer.Add(new DriveEntry("UniversalTime", time, this));


            
        }

        public override void  Invoke(DriveProvider provider)
        {
            DateTime standardTime = new DateTime(1970, 1, 1);
            IWsmanConnection conn = ((AmtRootService)GetRoot()).Connection;

            IManagedReference refToClock = conn.NewReference("AMT_TimeSynchronizationService");
            IManagedInstance inputObj = refToClock.CreateMethodInput("GetLowAccuracyTimeSynch");
            IManagedInstance outObj = refToClock.InvokeMethod(inputObj);

            if (!outObj.GetProperty("ReturnValue").ToString().Equals("0"))
                AmtException.ThrowInvokeError(outObj);

            uint ta0 = uint.Parse(outObj.GetProperty("Ta0").ToString());

            uint tm1 =(uint)DateTime.UtcNow.Subtract(standardTime).TotalSeconds;


            inputObj = refToClock.CreateMethodInput("SetHighAccuracyTimeSynch");
            inputObj.SetProperty("Ta0", ta0.ToString());
            inputObj.SetProperty("Tm1", tm1.ToString());
            inputObj.SetProperty("Tm2", tm1.ToString());
            outObj = refToClock.InvokeMethod(inputObj);

             
            switch (outObj.GetProperty("ReturnValue").ToString())
            {
                case "0":
                    break;
                case "1":
                    throw new WsmanInvokeException("Internal Error");
                case "36":
                    throw new WsmanInvokeException("Invalid Parameter");
                case "38":
                    throw new WsmanInvokeException("Flash write limit exceeded");
              
                default:
                    throw new WsmanInvokeException("AMT error " + outObj.GetProperty("ReturnValue").ToString());
            }

          
            _items = null;


        }

        public override object GetReturnObject()
        {
            return new NameValuePairItem(Name, Value);
        }
    
    
    }

}