using Edge.Core.Parser.BinaryParser.Util;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Wayne_Pump_Dart.MessageEntity.Incoming
{
    /// <summary>
    /// This transaction is sent by the pump if the status is changed 
    /// or if the pump receives the command 'RETURN STATUS' or ‘RETURN FILLING INFORMATION’.
    /// </summary>
    public class NozzleStatusAndFillingPrice_TransactionData
    {
        private TransactionData transactionData;

        /// <summary>
        /// TRANS + LNG + DATA
        /// </summary>
        /// <param name="oneTransactionFullData">TRANS + LNG + DATA</param>
        public NozzleStatusAndFillingPrice_TransactionData(TransactionData transactionData)
        {
            if (transactionData.TransactionNumber != 0x03)
                throw new ArgumentException("NozzleStatusAndFillingPrice_TransactionData must have transaction number 0x03");
            this.transactionData = transactionData;
        }

        public enum NozzleStatus
        {
            IN = 0x00,
            OUT = 0x01
        }

        /// <summary>
        /// without decimal points
        /// </summary>
        public int FillingPrice
        {
            get
            {
                var r = this.transactionData.RawData.Take(3).GetBCD();
                return r;
            }
        }

        /// <summary>
        /// Gets the nozzle status, key is the nozzle physical id.
        /// </summary>
        public KeyValuePair<byte, NozzleStatus> Status
        {
            get
            {
                //NOZIO bits 0 - 3 contain selected nozzle number.
                //NOZIO bit 4 contains nozzle in/out information.
                //    0 = in
                //    1 = out
                //02H Nozzle 2 selected, nozzle in
                //12H Nozzle 2 selected, nozzle out
                //10H No nozzle selected, nozzle out. (This is possible for a blending pump.)
                var nozzleStateBitMap = this.transactionData.RawData.Skip(3).First();
                var nozzleLogicalNumber = nozzleStateBitMap & 0x0F;
                var nozzleStatus = (nozzleStateBitMap & 0xF0) >> 4;
                return new KeyValuePair<byte, NozzleStatus>(
                    (byte)nozzleLogicalNumber,
                    (NozzleStatus)nozzleStatus);
            }
        }

    }
}