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

public class CoriolisEffect : MonoBehaviour
{

    public Vector3 downDir => Vector3.ProjectOnPlane((transform.position - center.transform.position), Vector3.forward);

    // Start is called before the first frame update
    public GameObject center;
    private Rigidbody rb;
    private const float MAX_GRAVITY = 9.8f;
    public float maxCoriolisForce;
    public float coriolisForceMultiplier = 2f;
    void Start()
    {
        rb = GetComponent<Rigidbody>();
        rb.useGravity = false;
    }

    // Update is called once per frame
    void FixedUpdate()
    {
        if (IsGrounded())
            return;

        Vector3 direction = downDir.normalized;
        Vector3 coriolisVector = -Vector3.Cross(direction, new Vector3(0,0,1)).normalized;
        Debug.Log(LerpCoriolisForce());
        float force = LerpCoriolisForce();
        
        rb.AddForce(coriolisVector * force * coriolisForceMultiplier * Time.deltaTime, ForceMode.Acceleration);
        //rb.AddForce(direction * LerpGravity(), ForceMode.Acceleration);
        Debug.DrawRay(transform.position, coriolisVector * force, Color.red);
    }

    float LerpGravity()
    {
        return Mathf.Lerp(0, MAX_GRAVITY, Vector3.Distance(gameObject.transform.position, center.transform.position) / 12.75f);
    }

    float LerpCoriolisForce()
    {
        Debug.Log(Vector3.Distance(gameObject.transform.position, center.transform.position));
        return Mathf.Lerp(maxCoriolisForce, 0, downDir.magnitude / 12.75f);
    }

    private bool IsGrounded()
    {

        Ray ray = new Ray(transform.position, downDir.normalized);
        RaycastHit hit;

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

    }
}