using System.Collections;
using System.Collections.Generic;
using UnityEngine;


[RequireComponent(typeof(Rigidbody))]
public class ArtificialGravity : MonoBehaviour
{
    [SerializeField]
    private RotationController Ship;

    [SerializeField]
    private float m_correlusMultiplier = 1;

    private Rigidbody rb;

    private void OnEnable()
    {
        rb = GetComponent<Rigidbody>();
        rb.useGravity = false;

        if (Ship == null)
            Ship = FindObjectOfType<RotationController>();
    }


    private void FixedUpdate()
    {
        ApplyGravity();
    }

    private void ApplyGravity()
    {
        if (Ship.RotationPeriod <= 0)
            return;

        Vector3 direction = Ship.getDownDirection(transform.position, false);
        float distance = direction.magnitude;
        float force = distance * Mathf.Pow(2 * Mathf.PI / Ship.RotationPeriod, 2);

        Debug.DrawRay(transform.position, transform.position + direction);

        rb.AddForce(direction.normalized * force * Time.fixedDeltaTime, ForceMode.Acceleration);

        if (!IsGrounded())
        {
            direction = Ship.getPerpendicularDirection(transform.position);

            rb.AddForce(direction * Ship.CorrelusStrength * m_correlusMultiplier * Time.fixedDeltaTime * distance, ForceMode.Acceleration);
            Debug.DrawRay(transform.position, direction, Color.blue);
        }
    }

    private bool IsGrounded()
    {

        Ray ray = new Ray(transform.position, Ship.getDownDirection(transform.position));
        RaycastHit hit;

        if (Physics.Raycast(ray, out hit, 0.25f)){
            return true;
        }
        return false;

    }





}