#include <stdlib.h>
#include "structs.h"
#include "collision.h"
#include "vectorOp.h"
#define MAXSPHERES 100

RGBA raytraceSphere(sphere **objectList, ray *lightray) {
    RGBA pixel = (RGBA){0,0,0,1};
    const int lightBounces = 1;
    sphere **spheresHitList = (sphere **)calloc( (lightBounces + 1),sizeof(sphere*) );

    sphere *nearestSphere = nullptr;
    vec3 nearestCollisionPoint = {10000,10000,10000};
    for (int i = 0; i < 100 && objectList[i] != nullptr; i++) {
        vec3 collisionPoint = collisionPointSphere(lightray, objectList[i]);
        if (collisionPoint.x == -10000000) {

        }
        else{
            if (vec3Length(collisionPoint)< vec3Length(nearestCollisionPoint)) {
                nearestCollisionPoint = collisionPoint;
                nearestSphere = objectList[i];
            }

        }
    }
    if (nearestSphere != nullptr) {
        vec3 sphereNormal = vec3Normalize(vec3Subtract(nearestCollisionPoint, nearestSphere->origin));
        pixel.r = -vec3Product(sphereNormal, lightray->direction);
    }


    free(spheresHitList);
    return pixel;

}