using System;
using System.ComponentModel.DataAnnotations;

namespace ln.ethercat
{
    public class PDO
    {
        readonly ECMaster ECMaster;

        public SDOValue SDOValue{ get; }

        public int AddressOffset { get; set; }
        public int AddressBit { get; set; }
        public int BitLength { get; set; }
        public int ByteLength {
            get => (BitLength + 7) / 8;
            set => BitLength = value * 8;
        }

        public PDO(ECMaster ecMaster, UInt16 slave, UInt16 index, byte subIndex)
        {
            ECMaster = ecMaster;
            if (!ECMaster.GetSDOValue(slave, index, subIndex, out SDOValue sdoValue))
                throw new Exception(String.Format("PDO: could not retrieve SDOValue {0}:{1:X4}.{2}", slave, index, subIndex));            
            SDOValue = sdoValue;
        }



    }
}