using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;

namespace DashViewer.Dash
{
    public class FontFile : IArchiveFile
    {
        public Archive.FileType Type { get; private set; }
        public string FriendlyType { get { return "Font file"; } }
        public int Offset { get; private set; }
        public string Path { get; private set; }
        public int TrueSize { get; private set; }
        public byte[] Data { get; private set; }

        public Color[][] Palettes { get; private set; }
        public Bitmap[] Images { get; private set; }

        public FontFile(Archive arc, Archive.FileType type, string path, int ofs, Program.LoaderCallbackDelegate lcd)
        {
            Type = type;
            Offset = ofs;
            Path = path;

            TrueSize = Helpers.ReadInt(arc.Data, ofs + 4, true);
            int filelen = Helpers.RoundUp((TrueSize + Archive.Padding), Archive.Padding);

            Data = new byte[filelen];
            Buffer.BlockCopy(arc.Data, ofs, Data, 0, Data.Length);

            Palettes = new Color[5][];
            Palettes[0] = new Color[4];
            Palettes[0][0] = Color.FromArgb(0, 0, 0);
            Palettes[0][1] = Color.FromArgb(216, 216, 216);
            Palettes[0][2] = Color.FromArgb(120, 120, 120);
            Palettes[0][3] = Color.FromArgb(32, 32, 32);
            int rofs = 0x8700;
            for (int i = 1; i < Palettes.GetLength(0); i++)
            {
                if (lcd != null) lcd(string.Format("{0}: Loading palettes...", System.IO.Path.GetFileName(Path)));

                Palettes[i] = new Color[4];
                for (int j = 0; j < Palettes[i].Length; j++)
                {
                    Palettes[i][j] = Helpers.ConvertFromRGBA5551(Helpers.ReadUShort(arc.Data, ofs + rofs, true));
                    rofs += 2;
                }
                rofs += 24;
            }

            int imgw = 256;
            int imgh = 512;
            int blockw = 128;
            int blockh = 32;

            Images = new Bitmap[Palettes.GetLength(0)];
            for (int i = 0; i < Images.Length; i++)
            {
                if (lcd != null) lcd(string.Format("{0}: Creating image for palette {1}...", System.IO.Path.GetFileName(Path), i));

                rofs = 0x800;
                Images[i] = new Bitmap(imgw, imgh);
                for (int y = 0; y < imgh; y += blockh) for (int x = 0; x < imgw; x += blockw)
                        for (int by = 0; by < blockh; by++) for (int bx = 0; bx < blockw; bx += 2)
                            {
                                byte r = Data[rofs];
                                int idx1 = (r & 0x3);
                                int idx2 = ((r & 0x30) >> 4);
                                if (y + by > 256)
                                {
                                    idx1 = ((r >> 2) & 0x3);
                                    idx2 = (((r >> 2) & 0x30) >> 4);
                                }
                                ((Bitmap)Images[i]).SetPixel(x + bx, y + by, Palettes[i][idx1]);
                                ((Bitmap)Images[i]).SetPixel(x + bx + 1, y + by, Palettes[i][idx2]);
                                rofs++;
                                if (rofs == 0x8800) rofs -= 0x8000;
                            }

                //if (Images[i] != null) Images[i].Save(string.Format(@"C:\MMLTEST_0x{0:X}_{1}.png", Offset, i), System.Drawing.Imaging.ImageFormat.Png);
            }
        }
    }
}