using System.Text;

namespace DatabaseExport.ISO
{
    public class IsoCode
    {
        private char[] _isoCodeFull = { '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0', '0' };
        private char _TestObject
        {
            get => _isoCodeFull[0];
            set => _isoCodeFull[0] = value;
        }
        public string TestObject
        {
            get => new string(new[] { _TestObject });
            set
            {
                if (string.IsNullOrEmpty(value)) { _TestObject = '?'; }
                else { _TestObject = value[0]; }
            }
        }

        private char _Position
        {
            get => _isoCodeFull[1];
            set => _isoCodeFull[1] = value;
        }
        public string Position
        {
            get => new string(new[] { _Position });
            set => _Position = string.IsNullOrEmpty(value) ? '?' : value[0];
        }

        private char[] _MainLocation
        {
            get => new[] { _isoCodeFull[2], _isoCodeFull[3], _isoCodeFull[4], _isoCodeFull[5] };
            set
            {
                for (var i = 0; i < 4; i++)
                {
                    if (value.Length <= i) { _isoCodeFull[i + 2] = '0'; }
                    else { _isoCodeFull[i + 2] = value[i]; }
                }
            }
        }
        private char[] _FineLocation1
        {
            get => new[] { _isoCodeFull[6], _isoCodeFull[7] };
            set
            {
                for (var i = 0; i < 2; i++)
                {
                    if (value.Length < i) { _isoCodeFull[i + 6] = '0'; }
                    else { _isoCodeFull[i + 6] = value[i]; }
                }
            }
        }
        private char[] _FineLocation2
        {
            get => new[] { _isoCodeFull[8], _isoCodeFull[9] };
            set
            {
                for (var i = 0; i < 2; i++)
                {
                    if (value.Length < i) { _isoCodeFull[i + 8] = '0'; }
                    else { _isoCodeFull[i + 8] = value[i]; }
                }
            }
        }
        private char[] _FineLocation3
        {
            get => new[] { _isoCodeFull[10], _isoCodeFull[11] };
            set
            {
                for (var i = 0; i < 2; i++)
                {
                    if (value.Length < i) { _isoCodeFull[i + 10] = '0'; }
                    else { _isoCodeFull[i + 10] = value[i]; }
                }
            }
        }
        private char[] _PhysicalDimension
        {
            get => new[] { _isoCodeFull[12], _isoCodeFull[13] };
            set
            {
                for (var i = 0; i < 2; i++)
                {
                    if (value.Length < i) { _isoCodeFull[i + 12] = '0'; }
                    else { _isoCodeFull[i + 12] = value[i]; }
                }
            }
        }
        private char _Direction
        {
            get => _isoCodeFull[14];
            set => _isoCodeFull[14] = value;
        }
        private char _FilterClass
        {
            get => _isoCodeFull[15];
            set => _isoCodeFull[15] = value;
        }
        public string FilterClass
        {
            get => new string(new[] { _FilterClass });
            set => _FilterClass = string.IsNullOrEmpty(value) ? '?' : value[0];
        }

        public IsoCode(string isoCode)
        {
            if (null == isoCode) { isoCode = ""; }
            if (isoCode.Length > 16) { isoCode = isoCode.Substring(0, 16); }
            if (isoCode.Length < 16)
            {
                isoCode = isoCode.PadRight(16, '?');
            }
            for (var i = 0; i < 16; i++) { _isoCodeFull[i] = isoCode[i]; }
        }
        public string StringRepresentation
        {
            get
            {
                var sb = new StringBuilder();
                foreach (var c in _isoCodeFull) { sb.Append(c); }
                return sb.ToString();
            }
            set
            {
                for (var i = 0; i < 16; i++)
                {
                    if (i >= value.Length) { _isoCodeFull[i] = '0'; }
                    else { _isoCodeFull[i] = value[i]; }
                }
            }
        }
        public static string GetString(MMEPossibleChannels channel, MMETestObjects container, MMEPositions position, MMEFilterClasses fc)
        {
            var iso = new IsoCode("");
            iso._Direction = channel.Direction[0];
            iso._FilterClass = channel.Default_Filter_Class[0];
            iso._FineLocation1 = channel.Fine_Loc_1.ToCharArray();
            iso._FineLocation2 = channel.Fine_Loc_2.ToCharArray();
            iso._FineLocation3 = channel.Fine_Loc_3.ToCharArray();
            iso._MainLocation = channel.Trans_Main_Loc.ToCharArray();
            iso._PhysicalDimension = channel.Physical_Dimension.ToCharArray();
            iso._Position = null == position ? '?' : position.Position[0];
            iso._TestObject = null == container ? '?' : container.Test_Object[0];
            iso._FilterClass = null == fc ? '?' : fc.Filter_Class[0];
            return iso.StringRepresentation;
        }
        /// <summary>
        /// returns the isocode for a channel
        /// considers whether it should mask the test time fields in the isocode 
        /// test time fields are test object, and filterclass
        /// returns isocode
        /// </summary>
        /// <param name="channel"></param>
        /// <param name="careAboutTestTimeFields"></param>
        /// <returns></returns>
        public static string GetString(MMEPossibleChannels channel, bool careAboutTestTimeFields)
        {
            var iso = new IsoCode("")
            {
                _Direction = channel.Direction[0],
                _FineLocation1 = channel.Fine_Loc_1.ToCharArray(),
                _FineLocation2 = channel.Fine_Loc_2.ToCharArray(),
                _FineLocation3 = channel.Fine_Loc_3.ToCharArray(),
                _MainLocation = channel.Trans_Main_Loc.ToCharArray(),
                _PhysicalDimension = channel.Physical_Dimension.ToCharArray(),
                _Position = channel.Position[0],
                _TestObject = careAboutTestTimeFields ? channel.Test_Object[0] : '?',
                _FilterClass = careAboutTestTimeFields ? channel.Default_Filter_Class[0] : '?'
            };
            return iso.StringRepresentation;
        }
        public static string GetString(string testObject, string position, string main, string floc1, string floc2, string floc3, string physdim, string dir, string fc)
        {
            return string.Format("{0}{1}{2}{3}{4}{5}{6}{7}{8}", testObject, position, main, floc1, floc2, floc3, physdim, dir, fc);
        }
    }
}