using System.Drawing;
using Silk.NET.Input;
using Silk.NET.OpenGL;
using Silk.NET.Windowing;

// ReSharper disable AccessToDisposedClosure

namespace Silk_Test;

internal static class Program
{
    private static void Main(string[] args)
    {
        var bug = true; // try change this

        using var window = Window.Create(WindowOptions.Default);

        // ReSharper disable once RedundantAssignment
        IInputContext input = null!;
        GL gl = null!;

        window.Load += () =>
        {
            gl = window.CreateOpenGL();
            input = window.CreateInput();
            input.Keyboards[0].KeyDown += OnKeyDown;
        };

        void OnKeyDown(IKeyboard keyboard, Key key, int code)
        {
            if (keyboard.IsKeyPressed(Key.AltLeft) && keyboard.IsKeyPressed(Key.Enter))
            {
                if (bug)
                {
                    switch (window.WindowState)
                    {
                        case WindowState.Normal:
                            window.WindowState = WindowState.Fullscreen;
                            break;
                        case WindowState.Minimized:
                            break;
                        case WindowState.Maximized:
                            window.WindowState = WindowState.Fullscreen;
                            break;
                        case WindowState.Fullscreen:
                            window.WindowState = WindowState.Normal;
                            break;
                        default:
                            throw new ArgumentOutOfRangeException();
                    }
                }
                else
                {
                    switch (window.WindowState)
                    {
                        case WindowState.Normal:
                            window.WindowState = WindowState.Fullscreen;
                            break;
                        case WindowState.Minimized:
                            break;
                        case WindowState.Maximized:
                            window.WindowState = WindowState.Normal;
                            window.WindowState = WindowState.Fullscreen;
                            break;
                        case WindowState.Fullscreen:
                            window.WindowState = WindowState.Normal;
                            break;
                        default:
                            throw new ArgumentOutOfRangeException();
                    }
                }
            }

            if (keyboard.IsKeyPressed(Key.Escape))
                window.Close();
        }

        window.Render += d =>
        {
            var color = window.WindowState switch
            {
                WindowState.Normal => Color.Red,
                WindowState.Minimized => Color.Green,
                WindowState.Maximized => Color.Blue,
                WindowState.Fullscreen => Color.White,
                _ => throw new ArgumentOutOfRangeException()
            };
            gl.ClearColor(color);
            gl.Clear(ClearBufferMask.ColorBufferBit);
        };

        window.Run();
    }
}