#ifndef TRIANGLE_H
#define TRIANGLE_H

#include "Common.h"
#include "Geometry/AABB.h"
#include <stdint.h>

typedef struct
{
    vec3s position;
    vec3s normal;
    vec3s color;
    vec2s uv;
} vertex_t;

typedef struct
{
    vertex_t vertices[3];
    vec3s face_normal;

    uint8_t material_id;
} triangle_t;

//TODO: Handle triangle remove, we can use something like sparse set.
typedef struct
{
    uint64_t count;
    uint64_t size;

    triangle_t* buffer;
} triangle_collection_t;

bool triangle_collection_init(size_t size, triangle_collection_t* triangles);
void triangle_collection_resize(triangle_collection_t* collection, size_t size);
void triangle_collection_free(triangle_collection_t* collection);

void triangle_create(vertex_t v1, vertex_t v2, vertex_t v3,  uint8_t material_id, triangle_collection_t* collection);

inline vec3s triangle_centroid(const triangle_t triangle)
{
    return glms_vec3_scale(glms_vec3_add(glms_vec3_add(triangle.vertices[0].position, triangle.vertices[1].position), triangle.vertices[2].position), 1.0f / 3.0f);
}

inline aabb_t compute_bounds_triangle(triangle_t triangle)
{
    aabb_t bounds;
    bounds.min = glms_vec3_minv(triangle.vertices[0].position, glms_vec3_minv(triangle.vertices[1].position, triangle.vertices[2].position));
    bounds.max = glms_vec3_maxv(triangle.vertices[0].position, glms_vec3_maxv(triangle.vertices[1].position, triangle.vertices[2].position));
    return bounds;
}

#endif // TRIANGLE_H