using System.Globalization;
using System.Text;

using Avalonia.Media;

using QRCoder;

namespace MeWeb.App.Services;

public static class QrCodes
{
  public static Geometry For(string text)
  {
    using var generator = new QRCodeGenerator();
    using var data = generator.CreateQrCode(text, QRCodeGenerator.ECCLevel.M);
    var path = new StringBuilder();
    for (var y = 0; y < data.ModuleMatrix.Count; y++)
    {
      var row = data.ModuleMatrix[y];
      for (var x = 0; x < row.Length; x++)
      {
        if (!row[x]) continue;
        var run = 1;
        while (x + run < row.Length && row[x + run]) run++;
        path.Append(CultureInfo.InvariantCulture, $"M{x},{y}h{run}v1h-{run}z");
        x += run - 1;
      }
    }
    return Geometry.Parse(path.ToString());
  }
}