using System;

using Microsoft.Xna.Framework.Input;

using Syntriax.Engine.Core;
using Syntriax.Engine.Network;
using Syntriax.Engine.Systems.Input;

namespace Pong.Behaviours;

public class PaddleBehaviour(Keys Up, Keys Down, float High, float Low, float Speed) : Behaviour2D, INetworkEntity
{
    private Keys Up { get; } = Up;
    private Keys Down { get; } = Down;
    public float High { get; } = High;
    public float Low { get; } = Low;
    public float Speed { get; set; } = Speed;

    private bool isUpPressed = false;
    private bool isDownPressed = false;

    private IButtonInputs<Keys> inputs = null!;
    private INetworkCommunicatorClient networkClient = null!;
    private INetworkCommunicatorServer? networkServer = null;

    protected override void OnUpdate()
    {
        if (isUpPressed && isDownPressed)
            return;

        if (isUpPressed)
        {
            Transform.Position = Transform.Position + Vector2D.Up * Universe.Time.DeltaTime * Speed;
            networkClient.SendToServer(new EntityPaddlePositionPacket(this));
        }
        else if (isDownPressed)
        {
            Transform.Position = Transform.Position + -Vector2D.Up * Universe.Time.DeltaTime * Speed;
            networkClient.SendToServer(new EntityPaddlePositionPacket(this));
        }

        Transform.Position = new Vector2D(Transform.Position.X, MathF.Max(MathF.Min(Transform.Position.Y, High), Low));
    }

    protected override void OnFirstActiveFrame()
    {
        inputs = Universe.FindRequiredBehaviour<IButtonInputs<Keys>>();
        networkClient = Universe.GetRequiredUniverseObject<INetworkCommunicatorClient>();
        networkServer = Universe.GetRequiredUniverseObject<INetworkCommunicatorServer>();
        networkClient.SubscribeToPackets<EntityPaddlePositionPacket>(ReceiveDataClient);
        networkServer.SubscribeToPackets<EntityPaddlePositionPacket>(ReceiveDataServer);
        inputs.RegisterOnPress(Up, OnUpPressed);
        inputs.RegisterOnRelease(Up, OnUpReleased);

        inputs.RegisterOnPress(Down, OnDownPressed);
        inputs.RegisterOnRelease(Down, OnDownReleased);
    }

    protected override void OnFinalize()
    {
        inputs.UnregisterOnPress(Up, OnUpPressed);
        inputs.UnregisterOnRelease(Up, OnUpReleased);

        inputs.UnregisterOnPress(Down, OnDownPressed);
        inputs.UnregisterOnRelease(Down, OnDownReleased);
    }

    private void OnUpPressed(IButtonInputs<Keys> inputs, Keys keys) => isUpPressed = true;
    private void OnUpReleased(IButtonInputs<Keys> inputs, Keys keys) => isUpPressed = false;
    private void OnDownPressed(IButtonInputs<Keys> inputs, Keys keys) => isDownPressed = true;
    private void OnDownReleased(IButtonInputs<Keys> inputs, Keys keys) => isDownPressed = false;

    public void ReceiveDataClient<T>(T data, string _)
    {
        if (data is not EntityPaddlePositionPacket position)
            return;

        Transform.Position = position.Position;
    }

    public void ReceiveDataServer<T>(T data, string fromClientId)
    {
        if (data is not EntityPaddlePositionPacket position)
            return;

        Transform.Position = position.Position;
        networkServer?.SendToClient("*", position);
    }

    public void ReceiveDataClient<T>(T data)
    {
        if (data is not EntityPaddlePositionPacket position)
            return;

        Transform.Position = position.Position;
    }

    public class EntityPaddlePositionPacket : IEntityNetworkPacket
    {
        public string EntityId = default!;
        public Vector2D Position = default!;

        string IEntityNetworkPacket.EntityId => EntityId;

        public EntityPaddlePositionPacket() { }
        public EntityPaddlePositionPacket(PaddleBehaviour paddleBehaviour)
        {
            EntityId = paddleBehaviour.Id;
            Position = paddleBehaviour.Transform.Position;
        }
    }
}