using Avalonia;
using Avalonia.OpenGL.Egl;

using System.CommandLine;

namespace GSS2.Test;

public partial class Program
{
    private enum RenderingMode
    {
        X11,
        DRM
    }

    private static string[]? _args = null;
    private static readonly RootCommand _rootCommand = new("GranuSight Software 2");
    private static readonly Command _cameraTuningCommand = new("camera-tuning")
    {
        Description = "Tune camera parameters"
    };
    private static readonly Option<RenderingMode> _renderingModeArgument = new("--rendering-mode")
    {
        Description = "Rendering mode to use",
        DefaultValueFactory = (_) => RenderingMode.X11
    };
    private static readonly Option<bool> _hideConsoleArgument = new("--hide-console")
    {
        Description = "Suppress console output",
        DefaultValueFactory = (result) => result.GetRequiredValue(_renderingModeArgument) == RenderingMode.DRM
    };

    public static event ConsoleCancelEventHandler? ShutdownRequested;

    [STAThread]
    public static int Main(string[] args)
    {
        _args = args;

        _rootCommand.Add(_cameraTuningCommand);
        _rootCommand.Add(_renderingModeArgument);
        _rootCommand.Add(_hideConsoleArgument);
        
        _rootCommand.SetAction(Ui);
        _cameraTuningCommand.SetAction(CameraTuning);

        Console.CancelKeyPress += new ConsoleCancelEventHandler(OnProgramShutdown);
        Console.WriteLine("Press Ctrl+C to shut down.");

        var parseResult = _rootCommand.Parse(_args);
        if (parseResult.Errors.Count() != 0)
        {
            foreach (var parseError in parseResult.Errors)
                Console.Error.WriteLine(parseError.Message);
            return 1;
        }

        return parseResult.Invoke();
    }

    private static void OnProgramShutdown(object? sender, ConsoleCancelEventArgs ea)
    {
        ShutdownRequested?.Invoke(sender, ea);
        ea.Cancel = true;
    }
}