using System.Collections.Immutable;
using System.IO;
using Encompass;
using KavTest.Components;
using KavTest.Engines;
using KavTest.Extensions;
using KavTest.Messages;
using KavTest.Renderers;
using KavTest.Spawners;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using MoonTools.Curve;

namespace KavTest
{
    class KavTestGame : Game
    {
        GraphicsDeviceManager graphics;

        WorldBuilder WorldBuilder { get; } = new WorldBuilder();
        World World { get; set; }

        public KavTestGame()
        {
            graphics = new GraphicsDeviceManager(this);
            graphics.PreferredBackBufferWidth = 1280;
            graphics.PreferredBackBufferHeight = 720;
            graphics.PreferMultiSampling = true;
            Content.RootDirectory = "Content";

            Window.AllowUserResizing = true;
            IsMouseVisible = true;
            
            Microsoft.Xna.Framework.Input.Mouse.IsRelativeMouseModeEXT = true;
        }

        protected override void LoadContent()
        {
            base.LoadContent();
        }

        protected override void UnloadContent()
        {
            base.UnloadContent();
        }

        protected override void Initialize()
        {
            base.Initialize();

            var rustyBallModel = Kav.ModelLoader.Load(
                GraphicsDevice,
                Smuggler.Importer.ImportGLB(GraphicsDevice, File.OpenRead("Content/rustysphere.glb"))
            );

            var lightBulbModel = Kav.ModelLoader.Load(
                GraphicsDevice,
                Smuggler.Importer.ImportGLB(GraphicsDevice, File.OpenRead("Content/cube.glb"))
            );

            var floorModel = Kav.ModelLoader.Load(
                GraphicsDevice,
                Smuggler.Importer.ImportGLB(GraphicsDevice, File.OpenRead("Content/floor.glb"))
            );

            WorldBuilder.AddEngine(new InputEngine(this));
            WorldBuilder.AddEngine(new AngularVelocityEngine());
            WorldBuilder.AddEngine(new MoveAlongCurve3DEngine());
            WorldBuilder.AddEngine(new MotionEngine());
            WorldBuilder.AddEngine(new CameraEngine());
            WorldBuilder.AddEngine(new RustyBallSpawner(rustyBallModel));
            WorldBuilder.AddEngine(new LightBulbSpawner(lightBulbModel));
            WorldBuilder.AddEngine(new StaticModelSpawner());
            WorldBuilder.AddEngine(new DirectionalLightSpawner());
            WorldBuilder.AddGeneralRenderer(new SceneRenderer(GraphicsDevice), 0);

            WorldBuilder.SendMessage(new RustyBallSpawnMessage(
                new Transform3D(new Vector3(0, 0, 0)),
                new Vector3(1, 1, -1)
            ));

            WorldBuilder.SendMessage(new RustyBallSpawnMessage(
                new Transform3D(new Vector3(-3, 0, 0)),
                new Vector3(-1, 1, -1)
            ));

            WorldBuilder.SendMessage(new RustyBallSpawnMessage(
                new Transform3D(new Vector3(3, 0, 0)),
                new Vector3(-1, 1, 1)
            ));

            WorldBuilder.SendMessage(new StaticModelSpawnMessage(
                new Transform3D(new Vector3(0, -3, 0), Quaternion.Identity, new Vector3(10f, 1f, 10f)),
                floorModel
            ));

            for (var i = 0; i < 1; i++)
            {
                var start = RandomHelper.RandomVector3(-5, 5);

                WorldBuilder.SendMessage(new LightBulbSpawnMessage(
                    new Transform3D(start.ToXNAVector(), Quaternion.Identity, new Vector3(0.1f, 0.1f, 0.1f)),
                    RandomHelper.RandomColor(),
                    10f,
                    RandomHelper.RandomLoop(start, -15, 15, 3, 10)
                ));
            }

            WorldBuilder.SendMessage(new DirectionalLightSpawnMessage(
                Quaternion.CreateFromAxisAngle(Vector3.Right, Microsoft.Xna.Framework.MathHelper.PiOver4),
                Color.GhostWhite,
                0.1f
            ));

            // WorldBuilder.SendMessage(new DirectionalLightSpawnMessage(
            //     Quaternion.CreateFromAxisAngle(Vector3.Right, Microsoft.Xna.Framework.MathHelper.PiOver4),
            //     Color.GhostWhite,
            //     0.1f
            // ));

            // WorldBuilder.SendMessage(new DirectionalLightSpawnMessage(
            //     Quaternion.CreateFromAxisAngle(Vector3.Right, Microsoft.Xna.Framework.MathHelper.PiOver2 + Microsoft.Xna.Framework.MathHelper.PiOver4),
            //     Color.GhostWhite,
            //     0.1f
            // ));

            var cameraEntity = WorldBuilder.CreateEntity();
            WorldBuilder.SetComponent(cameraEntity, new ArcballTransformComponent(
                new ArcballTransform(
                    new Vector3(0, 0, -10),
                    Microsoft.Xna.Framework.MathHelper.Pi,
                    0
                )
            ));
            WorldBuilder.SetComponent(cameraEntity, new PerspectiveCameraComponent(
                Microsoft.Xna.Framework.MathHelper.PiOver4,
                16f / 9f,
                0.01f,
                100f
            ));

            World = WorldBuilder.Build();
        }

        protected override void Update(GameTime gameTime)
        {
            World.Update(gameTime.ElapsedGameTime.TotalSeconds);

            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);

            World.Draw();

            base.Draw(gameTime);
        }
    }
}