using LibrarySDR.Enums;
using LibrarySDR.Requests;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static LibrarySDR.Helpers.BinaryHexHelper;

namespace LibrarySDR.Responses
{
    public class RegisterResponse
    {
        public PDUType PduType => PDUType.REGISTER_RESP;

        private RegisterStatus registerStatus;
        public RegisterStatus RegisterStatus { get { return registerStatus; } }

        public RegisterResponse(String hexResponsePayload)
        {
            String resp = hexResponsePayload;
            int i = 0;
            int prevIdx = 0;

            // get register status (8 bits = 1 byte = 2 hex characters)
            Int16 regStatus = 0;
            String hex = LittleToBigEndianHexString(resp.Substring(i = i + prevIdx, prevIdx = 2));
            Int16.TryParse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out regStatus);


            // convert response to RegisterStatus
            registerStatus = (RegisterStatus)regStatus;
        }



        public static String GetInstance(RegisterStatus regStatus)
        {
            StringBuilder sb = new StringBuilder("");

            // PDU Type (8 bits)
            sb.Append(GetBits((int)PDUType.REGISTER_RESP, 8));
                       
            // status (8 bits)
            sb.Append(GetBits((int)regStatus, 8));

            // get the header with the length
            String header = Header.GetHeaderBinary(sb.ToString().Length / 8);

            // add header in front of the request
            return BinaryStringToHexString($"{header}{sb.ToString()}", Padding.RIGHT);
        }
    }
}