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 RecordFormat
    {
        public ushort opcode;
        public ushort length;
        public ushort index;
        public ushort formatlen;
    }

    internal class Format : IRecords 
    {
        RecordFormat format;
        byte[] m_strings;
        //int m_formatlen;

        public Format()
        {
            format.opcode = 0x41E;
        }

        public ushort Index
        {
            set {format.index = value;}
        }

        public string FormatString
        {
            set 
            {
                m_strings = Globals.GetDefaultBytes(value);
                format.formatlen = (ushort)m_strings.Length;
            }
        }

        public ushort ID
        {
            get {return format.opcode;}
        }

        public ushort RecordSize
        {
            get {return (ushort)(9 + format.formatlen) ; }
        }


        #region IRecords ³ΙΤ±

        public byte[] GetByte()
        {
            byte[] b;
            int len = 9 + format.formatlen;

            b = new byte[len];

            format.length = (ushort)(len - 4);

            Globals.GetStructToBytes(format).CopyTo(b, 0);
            b[8] = 0;
            m_strings.CopyTo(b, 9);
            return b;
        }

        #endregion
    }
}