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

namespace LibrarySDR.Responses
{
    public class AcknowledgeResponse
    {
        private static PDUType PduType = PDUType.ACK_RESP;

        private static ProtocolIdentifier protocolIdentifier = ProtocolIdentifier.GPSUsingSDSTL;

        private static int areaSelection = 0;

        public static String GetInstance(Int64 sourceISSI, Int64 destinationISSI, int messageReference, DeliveredStatus deliveryStatus)
        {
            StringBuilder sb = new StringBuilder("");

            // PDU Type (8 bits)
            sb.Append(GetBits((int)PduType, 8));

            // source ISSI (32 bits)
            sb.Append(GetBits(sourceISSI, 32));

            // destination ISSI (32 bits)
            sb.Append(GetBits(destinationISSI, 32));

            // protocol identifier (8 bits)
            sb.Append(GetBits((int)protocolIdentifier, 8));

            // message reference (8 bits)
            sb.Append(GetBits(messageReference, 8));

            // area selection (8 bits)
            sb.Append(GetBits(areaSelection, 8));

            // delivery status (8 bits)
            sb.Append(GetBits((int)deliveryStatus, 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);
        }
    }
}