using LibrarySDR.Enums;
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 GroupMonitorExtResponse
    {
        public PDUType PduType => PDUType.GROUP_MONITOR_EXT_RESP;

        private Int64 hostISSI;
        public Int64 HostISSI { get { return hostISSI; } }

        private Dictionary<Int64, GroupMonitorExtResult> groupsResult = new Dictionary<long, GroupMonitorExtResult>();
        public Dictionary<Int64, GroupMonitorExtResult> GroupsResult { get { return groupsResult; } }

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

            // get host SSI (32 bits = 4 byte = 8 hex characters)
            String hex = LittleToBigEndianHexString(resp.Substring(i = i + prevIdx, prevIdx = 4 * 2));
            Int64.TryParse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out hostISSI);

            Int32 length = 0;
            // get length (16 bits = 2 byte = 16 hex characters)
            hex = LittleToBigEndianHexString(resp.Substring(i = i + prevIdx, prevIdx = 2 * 2));
            Int32.TryParse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out length);
            
            for (int j = 0; j < length; j++)
            {
                Int64 groupSSI = 0;
                hex = LittleToBigEndianHexString(resp.Substring(i = i + prevIdx, prevIdx = 4 * 2));
                Int64.TryParse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out groupSSI);
                
                Int16 result = 0;
                hex = LittleToBigEndianHexString(resp.Substring(i = i + prevIdx, prevIdx = 1 * 2));
                Int16.TryParse(hex, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out result);

                if (groupsResult.ContainsKey(groupSSI))
                    groupsResult.Remove(groupSSI);

                groupsResult.Add(groupSSI, (GroupMonitorExtResult)result);
            }

        }



        public override String ToString()
        {
            String groupsState = "";
            foreach (KeyValuePair<Int64, GroupMonitorExtResult> kvp in groupsResult)
                groupsState += $"[{kvp.Key},{kvp.Value}],";

            return $"Host ISSI : {HostISSI}  |   Groups Size : {groupsResult.Count}   |  GroupState : {groupsState}";
        }
    }
}