//
// Created by Tristan on 10/16/2025.
//

#ifndef CAMERA_H
#define CAMERA_H

#include <SDL3/SDL.h>
#include <cglm/cglm.h>
#include "../shaders/shader.h"

typedef struct {
    vec3 Position;
    vec3 Orientation;
    vec3 Up;
    float speed;
    float sensitivity;
    float FOV_deg;
    int width;
    int height;
    mat4 View; // cache for the calculated View Matrix
} Camera;

// initializer
void camera_init(Camera *self, vec3 initial_position, int width, int height);

/* --- Matrix calculation functions --- */
// Updates self->View matrix based on pos, orientation and up
void camera_update_view_matrix(Camera *self);

// calculates the projection matrix for a given set of planes
void camera_update_projection(Camera *self, float nearPlane, float forPlane, mat4 dest);

// generates (projection * view) and uploads to the shader program
void camera_matrix_to_shader(Camera *self, GLuint shader_program_ID, const char *uniform_name);

// TODO: Input handling (needs full SDL context later)
void camera_inputs(Camera *self, SDL_Event *event);

#endif //CAMERA_H