using System;
using System.Diagnostics;
using System.Globalization;
using System.Numerics;
using System.Threading;
using gaemstone;
using gaemstone.Bloxel;
using gaemstone.ECS;
using gaemstone.Utility;
using Silk.NET.Windowing;
using static gaemstone.Bloxel.Components.CoreComponents;
using static gaemstone.Client.Components.CameraComponents;
using static gaemstone.Client.Components.RenderingComponents;
using static gaemstone.Client.Components.ResourceComponents;
using static gaemstone.Client.Systems.FreeCameraController;
using static gaemstone.Client.Systems.Windowing;
using static gaemstone.Components.TransformComponents;

var culture = CultureInfo.InvariantCulture;
Thread.CurrentThread.CurrentCulture     = culture;
CultureInfo.DefaultThreadCurrentCulture = culture;

var universe = new Universe();
var game = universe.LookupByTypeOrThrow<Game>();

universe.Modules.Register<gaemstone.Flecs.Systems.Rest>();
universe.Modules.Register<gaemstone.Flecs.Systems.Monitor>();

var window = Window.Create(WindowOptions.Default with {
	Title = "gæmstone",
	Size = new(1280, 720),
	PreferredDepthBufferBits = 24,
});
window.Initialize();
window.Center();

// universe.Modules.Register<ObserverTest>();

universe.Modules.Register<gaemstone.Client.Systems.Windowing>();
universe.Modules.Register<gaemstone.Components.TransformComponents>();

universe.Modules.Register<gaemstone.Client.Components.RenderingComponents>();
universe.Modules.Register<gaemstone.Client.Systems.Renderer>();
universe.Modules.Register<gaemstone.Client.Systems.ImGuiManager>();
universe.Modules.Register<gaemstone.Client.Systems.ImGuiDemoWindow>();

universe.Modules.Register<gaemstone.Client.Components.ResourceComponents>();
universe.Modules.Register<gaemstone.Client.Systems.TextureManager>();
universe.Modules.Register<gaemstone.Client.Systems.MeshManager>();

universe.Modules.Register<gaemstone.Client.Components.InputComponents>();
universe.Modules.Register<gaemstone.Client.Systems.InputManager>();
universe.Modules.Register<gaemstone.Client.Systems.ImGuiInputDebug>();
universe.Modules.Register<gaemstone.Client.Systems.EntityInspector>();

universe.Modules.Register<gaemstone.Client.Components.CameraComponents>();
universe.Modules.Register<gaemstone.Client.Systems.FreeCameraController>();

game.Set(new Canvas(Silk.NET.OpenGL.ContextSourceExtensions.CreateOpenGL(window)));
game.Set(new GameWindow(window));

universe.New("MainCamera")
	.Set(Camera.Default3D)
	.Set((GlobalTransform)Matrix4x4.CreateTranslation(0.0F, 2.0F, 0.0F))
	.Set(new CameraController { MouseSensitivity = 12.0F })
	.Build();

var heartMesh = universe.New("/Immersion/Resources/heart.glb").Add<Mesh>().Build();
var swordMesh = universe.New("/Immersion/Resources/sword.glb").Add<Mesh>().Build();

var entities = universe.New("Entities").Build();
var rnd = new Random();
for (var x = -12; x <= 12; x++)
for (var z = -12; z <= 12; z++) {
	var position = Matrix4x4.CreateTranslation(x * 2, 0.0F, z * 2);
	var rotation = Matrix4x4.CreateRotationY(rnd.NextFloat(MathF.PI * 2));
	var (type, mesh) = rnd.Pick(("Heart", heartMesh), ("Sword", swordMesh));
	entities.NewChild()
		.Set((GlobalTransform)(rotation * position))
		.Add<Mesh>(mesh)
		.Build();
}

universe.Modules.Register<gaemstone.Bloxel.Components.CoreComponents>();
universe.Modules.Register<gaemstone.Bloxel.Systems.BasicWorldGenerator>();
universe.Modules.Register<gaemstone.Bloxel.Client.Systems.ChunkMeshGenerator>();

var texture = universe.New("/Immersion/Resources/terrain.png").Add<Texture>().Build();

var stone = universe.New("Stone").Set(TextureCoords4.FromGrid(4, 4, 1, 0)).Build();
var dirt  = universe.New("Dirt" ).Set(TextureCoords4.FromGrid(4, 4, 2, 0)).Build();
var grass = universe.New("Grass").Set(TextureCoords4.FromGrid(4, 4, 3, 0)).Build();

var chunks = universe.New("Chunks").Build();
var sizeH = 4; var sizeY = 2;
for (var cx = -sizeH; cx < sizeH; cx++)
for (var cy = -sizeY; cy < sizeY; cy++)
for (var cz = -sizeH; cz < sizeH; cz++) {
	var pos     = new ChunkPos(cx, cy - 2, cz);
	var storage = new ChunkStoreBlocks();
	chunks.NewChild()
		.Set((GlobalTransform)Matrix4x4.CreateTranslation(pos.GetOrigin()))
		.Set(new Chunk(pos))
		.Set(storage)
		.Add<Texture>(texture)
		.Build();
}

// universe.Modules.Register<ObserverTest>();

var stopwatch    = Stopwatch.StartNew();
var minFrameTime = TimeSpan.FromSeconds(1) / 30;
window.Run(() => {
	var delta = stopwatch.Elapsed;
	stopwatch.Restart();

	if (!universe.Progress(delta))
		window.Close();

	var requiredTime = stopwatch.Elapsed;
	while (stopwatch.Elapsed < minFrameTime) Thread.Sleep(0);
	var totalTime = stopwatch.Elapsed;
	// Console.WriteLine($"Frame time: req={requiredTime.TotalMilliseconds:F2}ms, total={totalTime.TotalMilliseconds:F2}ms");
});