using System.IO;
using Encompass;
using MoonTools;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using PongFE.Components;
using PongFE.Engines;
using PongFE.Enums;
using PongFE.Messages;
using PongFE.Renderers;
using PongFE.Spawners;
using SpriteFontPlus;

namespace PongFE
{
    class PongFEGame : Game
    {
        GraphicsDeviceManager graphics;

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

        SpriteBatch SpriteBatch { get; set; }
        Texture2D WhitePixel { get; set; }
        RenderTarget2D GameRenderTarget { get; set; }

        DynamicSpriteFont ScoreFont { get; set; }
        DynamicSpriteFont InstructionFont { get; set; }

        const int PLAY_AREA_WIDTH = 1280;
        const int PLAY_AREA_HEIGHT = 720;

        public PongFEGame()
        {
            graphics = new GraphicsDeviceManager(this);
            graphics.PreferredBackBufferWidth = 1920;
            graphics.PreferredBackBufferHeight = 1080;
            graphics.PreferMultiSampling = true;
            Content.RootDirectory = "Content";

            Window.AllowUserResizing = false;
            IsMouseVisible = true;
            IsFixedTimeStep = true;
        }

        protected override void LoadContent()
        {
            ResolutionScaler.Init(
                GraphicsDevice.PresentationParameters.BackBufferWidth,
                GraphicsDevice.PresentationParameters.BackBufferHeight,
                 PLAY_AREA_WIDTH,
                 PLAY_AREA_HEIGHT
            );

            SpriteBatch = new SpriteBatch(GraphicsDevice);

            WhitePixel = new Texture2D(GraphicsDevice, 1, 1);
            WhitePixel.SetData(new Color[] { Color.White });

            GameRenderTarget = new RenderTarget2D(GraphicsDevice, PLAY_AREA_WIDTH, PLAY_AREA_HEIGHT);

            ScoreFont = DynamicSpriteFont.FromTtf(
                File.ReadAllBytes(@"Content/Fonts/SquaredDisplay.ttf"),
                128
            );

            InstructionFont = DynamicSpriteFont.FromTtf(
                File.ReadAllBytes(@"Content/Fonts/SquaredDisplay.ttf"),
                48
            );

            WorldBuilder.AddEngine(new GameStateEngine(ScoreFont, InstructionFont));
            WorldBuilder.AddEngine(new InputEngine());
            WorldBuilder.AddEngine(new PaddleMovementEngine());
            WorldBuilder.AddEngine(new VelocityEngine());
            WorldBuilder.AddEngine(new MotionEngine());
            WorldBuilder.AddEngine(new CollisionEngine());
            WorldBuilder.AddEngine(new AngledBounceEngine());
            WorldBuilder.AddEngine(new BounceEngine());
            WorldBuilder.AddEngine(new DestroyEngine());
            WorldBuilder.AddEngine(new ScoreEngine());
            WorldBuilder.AddEngine(new UpdatePositionEngine());
            WorldBuilder.AddEngine(new UpdateVelocityEngine());
            WorldBuilder.AddEngine(new ComputerControlEngine());
            WorldBuilder.AddEngine(new GameWinEngine(ScoreFont));

            WorldBuilder.AddEngine(new BallSpawner(WhitePixel));
            WorldBuilder.AddEngine(new BoundarySpawner());
            WorldBuilder.AddEngine(new GoalBoundarySpawner());
            WorldBuilder.AddEngine(new PaddleSpawner(WhitePixel));
            WorldBuilder.AddEngine(new UITextSpawner());

            WorldBuilder.AddOrderedRenderer(new Texture2DRenderer(SpriteBatch));
            WorldBuilder.AddGeneralRenderer(new CenterLineRenderer(SpriteBatch, WhitePixel), 0);
            WorldBuilder.AddGeneralRenderer(new ScoreRenderer(SpriteBatch, ScoreFont), 0);
            WorldBuilder.AddGeneralRenderer(new UITextRenderer(SpriteBatch), 0);

            var playAreaEntity = WorldBuilder.CreateEntity();
            WorldBuilder.SetComponent(playAreaEntity, new PlayAreaComponent(PLAY_AREA_WIDTH, PLAY_AREA_HEIGHT));

            var gameStateEntity = WorldBuilder.CreateEntity();
            WorldBuilder.SetComponent(gameStateEntity, new GameStateComponent(GameState.Init));

            var ballParametersEntity = WorldBuilder.CreateEntity();
            WorldBuilder.SetComponent(ballParametersEntity, new BallParametersComponent(500, 0.5));

            WorldBuilder.SendMessage(new ChangeGameStateMessage(GameState.Title));
            World = WorldBuilder.Build();
        }

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

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

            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.SetRenderTarget(GameRenderTarget);
            GraphicsDevice.Clear(Color.Black);

            SpriteBatch.Begin(SpriteSortMode.Deferred, BlendState.NonPremultiplied);
            World.Draw();
            SpriteBatch.End();

            GraphicsDevice.SetRenderTarget(null);
            GraphicsDevice.Clear(Color.Black);

            SpriteBatch.Begin(
                SpriteSortMode.Deferred,
                null,
                null,
                null,
                null,
                null,
                ResolutionScaler.TransformMatrix
            );

            SpriteBatch.Draw(
                GameRenderTarget,
                Vector2.Zero,
                Color.White
            );

            SpriteBatch.End();

            base.Draw(gameTime);
        }
    }
}