using FlaxEngine;

namespace Game;

public class CameraSpring : Script
{
    private bool lastGround;
    private Float3 lastPosition;
    public float percY;

    private Actor playerActor;
    private PlayerMovement playerMovement;

    public float speed = 240f;
    private Float3 targetOffset;
    private Actor viewModelHolder;

    public override void OnStart()
    {
        playerActor = Actor.Parent.Parent;
        playerMovement = playerActor.GetScript<PlayerMovement>();
        viewModelHolder = playerActor.GetChild("ViewModelHolder");

        lastGround = playerMovement.OnGround;
        targetOffset = Actor.LocalPosition;
    }

    private void UpdatePosition(Float3 position)
    {
        Actor.Position = position;
        viewModelHolder.Position = position;
    }

    public override void OnUpdate()
    {
        Float3 position = Actor.Parent.Position + targetOffset;
        Float3 targetPosition = position;

        if (playerMovement.OnGround)
        {
            float deltaY = position.Y - lastPosition.Y;
            //if (Mathf.Abs(deltaY) < 10f)
            if (deltaY > 0)
            {
                if (deltaY > 100f)
                {
                    // Teleported, snap instantly
                    UpdatePosition(position);
                }
                else
                {
                    const float catchUpDistance = 10f;
                    const float catchUpMinMultip = 0.25f;
                    percY = Mathf.Abs(deltaY) / catchUpDistance;
                    percY = Mathf.Min(1.0f, percY + catchUpMinMultip);
                    percY *= percY;

                    float adjustSpeed = speed * Time.DeltaTime * percY;

                    position.Y = lastPosition.Y; //-= deltaY;
                    position.Y = Mathf.MoveTowards(position.Y, targetPosition.Y, adjustSpeed);
                    UpdatePosition(position);
                }
            }
        }
        else
        {
            UpdatePosition(position);
        }

        lastPosition = position;
        lastGround = playerMovement.OnGround;
    }
}