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


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

    [Header("Settings")]
    [SerializeField]
    private float m_gravityMultiplier = 1;

    [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()
    {
        bool isGrounded = IsGrounded();
        ApplyGravity();
        if (!isGrounded)
            ApplyCorrelus();
    }

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

        Vector3 direction = Ship.GetGravityAtPoint(transform.position);
        Debug.DrawRay(transform.position, direction,Color.red);
        //Debug.Log($"Direction: {direction.magnitude}");

        rb.AddForce(direction * m_gravityMultiplier, ForceMode.Acceleration);
    }

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

        Vector3 force = 2 * Vector3.Cross(rb.velocity, Ship.RotationAxis) * (2 * Mathf.PI / Ship.RotationPeriod);


        rb.AddForce(force * m_correlusMultiplier, ForceMode.Acceleration);
    }


    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;

    }





}