using System;
using UnityEngine;


[RequireComponent(typeof(BoxCollider))]
public class SlopeCollider : MonoBehaviour
{
    public int collisionLayer = 11;

    private readonly ContactPoint[] contacts = new ContactPoint[4];
    private Transform t;
    private BoxCollider bikeCollider;

    private void Start()
    {
        t = transform;
        bikeCollider = GetComponent<BoxCollider>();
    }

    private void OnCollisionStay(Collision other)
    {
        if (other.gameObject.layer == collisionLayer)
        {
            var numberOfContacts = other.GetContacts(this.contacts);
            //Debug.Log($"Has {numberOfContacts} contacts with {other.gameObject.name}");
            /*foreach (var c in contacts)
            {
                Debug.DrawLine(c.point, c.point + c.normal * 0.5f, Color.red);
            }*/

            var bounds = bikeCollider.bounds;
            var leftBackCorner = t.TransformPoint(bikeCollider.center - bikeCollider.size / 2);
            var localExtends = bikeCollider.size;
            localExtends.Scale(t.localScale);

            var rightBackCorner = leftBackCorner + t.right * localExtends.x;
            var forward = t.forward;
            var leftFrontCorner = leftBackCorner + forward * localExtends.z;
            var rightFrontCorner = rightBackCorner + forward * localExtends.z;

            var minSide = Helpers.GetMinComponent(localExtends);

            Debug.DrawLine(leftBackCorner, rightBackCorner, Color.red);
            Debug.DrawLine(leftBackCorner, leftBackCorner + t.up * localExtends.y, Color.green);
            Debug.DrawLine(leftBackCorner, leftFrontCorner, Color.blue);
            
            foreach(var c in contacts)
            {
                if ((leftBackCorner - c.point).magnitude < minSide/2.2f)
                {
                   // Debug.Log("Hit LeftBackCorner");
                }
                else if ((rightBackCorner - c.point).magnitude < minSide/2.2f)
                {
                   // Debug.Log("Hit RightBackCorner");
                }
                else if ((leftFrontCorner - c.point).magnitude < minSide/2.2f)
                {
                   // Debug.Log("Hit LeftFrontCorner");
                }
                else if ((rightFrontCorner - c.point).magnitude < minSide/2.2f)
                {
                   // Debug.Log("Hit RightFrontCorner");
                }
            }


            //Debug.Log($"Bounds = {bounds}");
            //Debug.Log($"LocalCenter = {localCenter}, localExtends = {localExtends}");
        }
    }
}