using System;

namespace Unplugged.Segy
{
    class FileHeader : IFileHeader
    {
        public string Text { get; set; }
        public FormatCode SampleFormat { get; set; }
        public bool IsLittleEndian { get; set; }
        public int SampleNumber { get; set; }
        public int SampleInteral { get; set; }

        public int GetValue(int position, int len)
        {
            int nDataValue = int.MinValue;
            if (headerBuffer == null || headerBuffer.Length == 0)
            {
                return nDataValue;
            }

            if (len == 2)
            {
                byte[] bts = new byte[2];
                bts[0] = headerBuffer[position + 1]; bts[1] = headerBuffer[position];
                nDataValue = BitConverter.ToInt16(bts, 0);

                // SegyReader.ToInt16(headerBuffer, position, IsLittleEndian);
            }
            else if (len == 4)
            {
                nDataValue = SegyReader.ToInt32(headerBuffer, position, IsLittleEndian);
            }
            return nDataValue;
        }
        public byte[] headerBuffer;
    }
}