using System.Collections.Immutable;
using System.IO;
using Encompass;
using KavTest.Components;
using KavTest.Engines;
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"))
            );

            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.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)
            ));

            var lightMovementSpline = new SplineCurve3D(
                ImmutableArray.Create<ICurve3D>(
                    new QuadraticBezierCurve3D(
                        new System.Numerics.Vector3(-5, 2, -5),
                        new System.Numerics.Vector3(20, 50, -20),
                        new System.Numerics.Vector3(10, 20, 10)
                    ),
                    new QuadraticBezierCurve3D(
                        new System.Numerics.Vector3(10, 20, 10),
                        new System.Numerics.Vector3(-20, -50, -10),
                        new System.Numerics.Vector3(-5, 2, -5)
                    )
                ),
                ImmutableArray.Create<float>(
                    3f,
                    3f
                ),
                true
            );

            WorldBuilder.SendMessage(new LightBulbSpawnMessage(
                new Transform3D(new Vector3(-5, 2, -5), Quaternion.Identity, new Vector3(0.25f, 0.25f, 0.25f)),
                Color.White,
                300f,
                lightMovementSpline
            ));

            // WorldBuilder.SendMessage(new LightBulbSpawnMessage(
            //     new Transform3D(new Vector3(5, 2, -5)),
            //     Color.Blue,
            //     300f
            // ));

            // WorldBuilder.SendMessage(new LightBulbSpawnMessage(
            //     new Transform3D(new Vector3(-5, -2, -5)),
            //     Color.Red,
            //     300f
            // ));

            // WorldBuilder.SendMessage(new LightBulbSpawnMessage(
            //     new Transform3D(new Vector3(-5, 2, 5)),
            //     Color.Yellow,
            //     300f
            // ));

            // WorldBuilder.SendMessage(new LightBulbSpawnMessage(
            //     new Transform3D(new Vector3(-5, 2, -10)),
            //     Color.Orange,
            //     300f
            // ));

            // WorldBuilder.SendMessage(new LightBulbSpawnMessage(
            //     new Transform3D(new Vector3(-10, 2, -5)),
            //     Color.CornflowerBlue,
            //     300f
            // ));

            var directionalLightEntity = WorldBuilder.CreateEntity();
            WorldBuilder.SetComponent(directionalLightEntity, new Transform3DComponent(
                new Transform3D(
                    Vector3.Zero,
                    Quaternion.CreateFromAxisAngle(Vector3.Right, Microsoft.Xna.Framework.MathHelper.PiOver2)
                )
            ));
            WorldBuilder.SetComponent(directionalLightEntity, new DirectionalLightComponent(
                Color.Blue,
                2f
            ));

            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 CameraComponent(
                Matrix.CreatePerspectiveFieldOfView(
                    Microsoft.Xna.Framework.MathHelper.PiOver4,
                    16f / 9f,
                    0.1f,
                    200f
                )
            ));

            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);
        }
    }
}