public class QRCodeForm
{
    /// <summary>
    /// Content to gen to qrcode
    /// </summary>
    [Required]
    public string? Text { get; set; }

    /// <summary>
    /// Length of the qrcode image range 1 to 40
    /// </summary>
    [Range(1, 40)]
    public int? Version { get; set; } = null;

    /// <summary>
    /// Error correction level, is one of L, M, Q and H, default H
    /// </summary>
    [DefaultValue("H")]
    [LevelValidation]
    public string Level { get; set; } = "H";

    /// <summary>
    /// Is qrcode image colorized
    /// </summary>
    public bool Colorized { get; set; } = false;

    /// <summary>
    /// The contrast of the qrcode image, defaule 1.0
    /// </summary>
    [DefaultValue(1.0)]
    public double Contrast { get; set; } = 1.0;

    /// <summary>
    /// The brightness of the qrcode image, defaule 1.0
    /// </summary>
    [DefaultValue(1.0)]
    public double Brightness { get; set; } = 1.0;
} 

[HttpPost]
public async Task<IActionResult> Generate([FromForm] QRCodeForm form, IFormFile? file)
{
    var outDir = Directory.GetCurrentDirectory();
    var isUnix = RuntimeInformation.IsOSPlatform(OSPlatform.OSX) || RuntimeInformation.IsOSPlatform(OSPlatform.Linux);
    if (isUnix)
    {
        outDir = "/tmp";
    }

    var command = $"amzqr {form.Text} -l {form.Level.ToUpper()}";

    var isGif = false;
    var tmpPath = string.Empty;
    if (file != null)
    {
        var ext = Path.GetExtension(file.FileName).ToLower();
        if (ext == ".gif")
        {
            isGif = true;
        }

        tmpPath = Path.Combine(outDir, isGif ? $"{Guid.NewGuid()}.gif" : $"{Guid.NewGuid()}.png");
        await using var stream = System.IO.File.Create(tmpPath);
        await file.CopyToAsync(stream);

        command = form.Colorized ? $"{command} -p {tmpPath} -c" : $"{command} -p {tmpPath}";

        if (form.Version == null)
        {
            form.Version = 10;
        }
    }

    if (form.Version != null)
    {
        command = $"{command} -v {form.Version}";
    }

    var filename = isGif ? $"{Guid.NewGuid()}.gif" : $"{Guid.NewGuid()}.png";
    var filePath = Path.Combine(outDir, filename);

    command = $"{command} -n {filePath} -d {outDir} -con {form.Contrast} -bri {form.Brightness}";

    var (code, message) = ExecuteCommand(command);

    if (code != 0)
    {
        return StatusCode(StatusCodes.Status500InternalServerError, new { Message = message });
    }

    var bytes = await System.IO.File.ReadAllBytesAsync(filePath);
    System.IO.File.Delete(filePath);

    if (!string.IsNullOrWhiteSpace(tmpPath))
    {
        System.IO.File.Delete(tmpPath);
    }

    var contentType = isGif ? "image/gif" : "image/png";
    return File(bytes, contentType, filename);
}

private (int, string) ExecuteCommand(string command)
{
    var isUnix = RuntimeInformation.IsOSPlatform(OSPlatform.OSX) || RuntimeInformation.IsOSPlatform(OSPlatform.Linux);
    var escapedArgs = command.Replace("\"", "\\\"");
    var process = new Process
    {
        StartInfo = new ProcessStartInfo
        {
            FileName = isUnix ? "/bin/sh" : "powershell",
            Arguments = isUnix ? $"-c \"{escapedArgs}\"" : command,
            RedirectStandardOutput = true,
            RedirectStandardError = true,
            UseShellExecute = false,
            CreateNoWindow = true
        }
    };

    process.Start();
    process.WaitForExit();

    var message = process.StandardOutput.ReadToEnd();
    if (process.ExitCode != 0)
    {
        message = process.StandardError.ReadToEnd();
    }

    return (process.ExitCode, message);
}