// Copyright (c) 2022 - schick Informatik
// bsmd.AIS2Service [AIS_BaseStationReport.cs]: Daniel Schick
// Description: Implementation of an AIS Base Station report incl. decoding
// 

using log4net;
using System;
using System.Collections;

namespace bsmd.AIS2Service
{
    internal class AIS_BaseStationReport : AISClass
    {        

        #region fields

        private uint _repeatIndicator;
        private DateTime? _utcTimestamp;
        private bool _accuracy;
        private int _latitude;
        private int _longitude;
        private int _epfdType;
        bool _raim;
        private uint _radio;

        private static readonly ILog _log = LogManager.GetLogger(typeof(AIS_BaseStationReport));

        #endregion

        #region Properties

        public uint RepeatIndicator { get { return _repeatIndicator; } }

        public DateTime? UTCTimestamp { get { return _utcTimestamp; } }

        public bool Accuracy { get { return _accuracy; } }

        public int Latitude { get { return _latitude; } }

        public int Longitude { get { return _longitude; } }

        public int EPFD { get { return _epfdType; } }

        public bool Raim { get { return _raim; } }

        public uint Radio { get { return _radio; } }

        #endregion

        #region abstract class implementation

        protected override Status Decode()
        {
            Status result = Status.OK;
            BitArray bits = DecodeBinary(_data);
            uint year = 0;
            uint month = 0;
            uint day = 0;
            uint hour = 0;
            uint minute = 0;
            uint second = 0;

            try
            {
                _repeatIndicator = GetUInt(bits, 6, 7);
                _mmsi = GetInt(bits, 8, 37);
                year = GetUInt(bits, 38, 51);
                month = GetUInt(bits, 52, 55);
                day = GetUInt(bits, 56, 60);
                hour = GetUInt(bits, 61, 65);
                minute = GetUInt(bits, 66, 71);
                second = GetUInt(bits, 72, 77);                
                _utcTimestamp = new DateTime((int) year, (int) month, (int) day, (int) hour, (int) minute, (int) second, DateTimeKind.Utc);
                _accuracy = GetInt(bits, 78, 78) == 1;
                _longitude = GetInt(bits, 79, 106);
                _latitude = GetInt(bits, 107, 133);                
                _epfdType = GetInt(bits, 134, 137);
                _raim = GetInt(bits, 148, 148) == 1;
                _radio = GetUInt(bits, 149, 167);
            }
            catch(ArgumentOutOfRangeException)
            {
                _log.WarnFormat("Year: {0} Month: {1} Day: {2} Hour: {3} Minute: {4} Second: {5}", year, month, day, hour, minute, second);
                result = Status.PARSE_ERROR;
            }
            catch (Exception e)
            {
                _log.WarnFormat("Error decoding AIS base station report: {0}", e.Message);
                result = Status.PARSE_ERROR;
            }
            
            return result;
        }
    #endregion
    }
}