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 RecordColInfo
    {
        public ushort opcode;
        public ushort length;
        public ushort firstcol;
        public ushort lastcol;
        public ushort width;
        public ushort xf;
        public ushort flags;
        public ushort notused;

        // Width is defined as 1/256 of the width of the zero character from the default font
        // as our default font is always Arial 10 then this value represents 1 pixel
    }

    public class ColInfo : IRecords 
    {
        const Single multiplier = 36.57F;

        RecordColInfo colinfo;

        public ColInfo()
        {
            colinfo.opcode = 0x7D;
            colinfo.length = 0xC;
            colinfo.notused = 0x0 ;
        }

        public ushort FirstColumn
        {
            set {colinfo.firstcol = value;}
        }

        public ushort LastColumn
        {
            set {colinfo.lastcol = value;}
        }

        public ushort Width
        {
            set { colinfo.width = (ushort)(Math.Round(value * multiplier)); }
        }

        public ushort CellStyle
        {
            set { colinfo.xf = value;}
        }

        public bool Hidden
        {
            set { colinfo.flags = (ushort)(value ? 0x1 : 0x0); }
        }

        #region IRecords ³ΙΤ±

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

        #endregion
    }
}