using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Text;
using System.IO;
using System.Text;
using System.Windows.Forms;

namespace TeslaConsole;

public class PlasmaBitmaps
{
	public const string DefaultFontFamily = "Microsoft Sans Serif";

	private static bool sEnableCustomBitmaps;

	public static bool EnableCustomBitmaps
	{
		get
		{
			return sEnableCustomBitmaps;
		}
		set
		{
			sEnableCustomBitmaps = value;
		}
	}

	public static void GenerateBitmaps(out Bitmap large, out Bitmap small, string str)
	{
		GenerateBitmaps(out large, out small, "Microsoft Sans Serif", str);
	}

	public static void GenerateBitmaps(out Bitmap large, out Bitmap small, string fontName, string str)
	{
		large = GenerateBitmap(128, 32, fontName, str);
		small = GenerateBitmap(64, 16, fontName, str);
	}

	public static Bitmap GenerateBitmap(int width, int height, string str)
	{
		return GenerateBitmap(width, height, "Microsoft Sans Serif", str);
	}

	public static Bitmap GenerateBitmap(int width, int height, string fontName, string str)
	{
		if (sEnableCustomBitmaps)
		{
			Bitmap bitmap = LoadCustomBitmap(width, height, str);
			if (bitmap != null)
			{
				return bitmap;
			}
		}
		Bitmap bitmap2 = new Bitmap(width, height);
		using Graphics graphics = Graphics.FromImage(bitmap2);
		graphics.SmoothingMode = SmoothingMode.None;
		graphics.CompositingQuality = CompositingQuality.AssumeLinear;
		graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
		graphics.TextRenderingHint = TextRenderingHint.SingleBitPerPixelGridFit;
		graphics.Clear(Color.Black);
		int num = 24;
		while (true)
		{
			using Font font = new Font(fontName, num);
			SizeF sizeF = graphics.MeasureString(str, font);
			if (sizeF.Width <= (float)bitmap2.Width && sizeF.Height <= (float)bitmap2.Height)
			{
				Rectangle rectangle = new Rectangle(0, 0, bitmap2.Width, bitmap2.Height);
				StringFormat stringFormat = new StringFormat();
				stringFormat.Alignment = StringAlignment.Center;
				stringFormat.LineAlignment = StringAlignment.Center;
				graphics.DrawString(str, font, Brushes.White, rectangle, stringFormat);
				return bitmap2;
			}
			num = ((num <= 2) ? (num / 2) : (num - 2));
		}
	}

	/// <summary>
	/// The operator-supplied plasma image for this string at this size, or null
	/// when there is none (the caller then renders the text procedurally).
	///
	/// Two folders are searched, in order:
	///   1. %ProgramData%\Tesla Console\Plasma Images  - this machine's own art,
	///      which survives reinstalls and wins over anything shipped.
	///   2. Plasma Images\ next to TeslaConsole.exe    - the set that rolls with
	///      the release, so art can be version-controlled and deployed.
	/// The file name is "&lt;text&gt;_&lt;width&gt;x&lt;height&gt;.bmp", e.g. Camera_128x32.bmp.
	///
	/// Nothing here may throw: participant names come from operator input, and a
	/// name containing a character that is illegal in a path used to take out
	/// egg generation entirely once this option was switched on.
	/// </summary>
	private static Bitmap LoadCustomBitmap(int width, int height, string str)
	{
		string fileName = $"{str}_{width}x{height}.bmp";
		if (fileName.IndexOfAny(Path.GetInvalidFileNameChars()) >= 0)
		{
			return null;
		}
		string[] searchRoots = new string[2]
		{
			Program.GetCommonAppDataDirectory(),
			Path.GetDirectoryName(Application.ExecutablePath)
		};
		foreach (string searchRoot in searchRoots)
		{
			try
			{
				string path = Path.Combine(Path.Combine(searchRoot, "Plasma Images"), fileName);
				if (!File.Exists(path))
				{
					continue;
				}
				// Copied out of the file rather than Image.FromFile'd: that keeps the
				// bitmap backed by the file for its whole lifetime, which locks the art
				// against an operator swapping it while the console is running.
				using FileStream stream = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read);
				using Image image = Image.FromStream(stream);
				if (image.Width == width && image.Height == height)
				{
					return new Bitmap(image);
				}
			}
			catch
			{
			}
		}
		return null;
	}

	public static void GenerateStrings(out string large, out string small, string str)
	{
		GenerateStrings(out large, out small, "Microsoft Sans Serif", str);
	}

	public static void GenerateStrings(out string large, out string small, string fontName, string str)
	{
		large = GenerateString(128, 32, fontName, str);
		small = GenerateString(64, 16, fontName, str);
	}

	public static string GenerateString(int width, int height, string str)
	{
		return GenerateString(width, height, "Microsoft Sans Serif", str);
	}

	public static string GenerateString(int width, int height, string fontName, string str)
	{
		using Bitmap bitmap = GenerateBitmap(width, height, fontName, str);
		return ConvertBitmap(bitmap);
	}

	public static string ConvertBitmap(Bitmap bitmap)
	{
		if (bitmap.Width % 8 != 0 || bitmap.Height % 8 != 0)
		{
			throw new ArgumentOutOfRangeException("bitmap");
		}
		StringBuilder stringBuilder = new StringBuilder();
		for (int i = 0; i < bitmap.Height; i++)
		{
			stringBuilder.Append("bitmap=");
			for (int j = 0; j < bitmap.Width / 8; j++)
			{
				byte b = 0;
				for (int k = 0; k < 8; k++)
				{
					if (bitmap.GetPixel(j * 8 + k, i).GetBrightness() >= 0.5f)
					{
						b = (byte)(b | (byte)(128 >> k));
					}
				}
				stringBuilder.Append(b.ToString("X2"));
			}
			stringBuilder.Append("\n");
		}
		stringBuilder.AppendFormat("x={0}\n", bitmap.Width);
		stringBuilder.AppendFormat("y={0}\n", bitmap.Height);
		return stringBuilder.ToString();
	}
}