using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using Biff8Excel.Interfaces;

namespace Biff8Excel.Records
{
    [StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Auto, Pack = 1)]
    struct RecordBOF
    {
        public ushort opcode;   // 0x809;
        public ushort length;   // 0x10;
        public ushort version;  // 0x600;
        public EnumBofTypes type;
        public ushort build;    // 0x27F3;
        public ushort year;     // 0x7CD;    //1997
        public uint history;    // 0x40C9;
        public uint rversion;   // 0x106;
    }

    internal enum EnumBofTypes : ushort
    {
        bofWorkbook = 0x5,
        bofWorkSheet = 0x10
    }

    internal class BOF : IRecords 
    {

        RecordBOF bof;
        
        public BOF()
        {
            bof.opcode = 0x809;
            bof.length = 0x10;
            bof.type = EnumBofTypes.bofWorkbook ;
            bof.version = 0x600;
            bof.year = 0x7CD;
            bof.build = 0x27F3;
            bof.history = 0x40C9;
            bof.rversion = 0x106;
            //bof.build = 0x19A0;
            //bof.history = 0xC0;
            //bof.rversion = 0x306;
        }

        internal EnumBofTypes DataType
        {
            set{ bof.type = value;}
        }

        internal ushort Id
        {
            get{return bof.opcode ;}
        }
    
        #region IRecords ³ΙΤ±

        public byte[]  GetByte()
        {
            return Globals.GetStructToBytes(bof); 
        }

        #endregion
    }
}