#ifndef RASTERISER_H
#define RASTERISER_H

#include "aliases.h"
#include "camera/camera.h"
#include "list/typed_list.h"
#include "mem_arena.h"
#include "vector/vec.h"
#include "window/window.h"

#define INVALID_VERTEX -1

typedef struct {
  vec3f_t position;
  f32 h;
} vertex_t;

typedef struct {
  i64 idx0;
  i64 idx1;
  i64 idx2;
  colour_t colour;
} scene_triangle_t;

MAKE_LIST_TYPE(f32);
MAKE_LIST_TYPE(vec2i_t);
MAKE_LIST_TYPE(vec3f_t);
MAKE_LIST_TYPE(vec4f_t);
MAKE_LIST_TYPE(vertex_t);
MAKE_LIST_TYPE(scene_triangle_t);

typedef enum {
  RASTERISER_RENDER_WIREFRAME,
  RASTERISER_RENDER_SOLID,
} render_type_t;

typedef struct {
  vec2i_t p0;
  vec2i_t p1;
} line_t;

typedef struct {
  vec2i_t p0;
  vec2i_t p1;
  vec2i_t p2;
  f32 h0;
  f32 h1;
  f32 h2;
  colour_t colour;
} triangle_t;

typedef struct {
  list_vertex_t *vertices;
  list_scene_triangle_t *triangles;
} model_t;
#define NULL_MODEL ((model_t){0})

typedef struct {
  f32 scale;
  vec3f_t rotation;
  vec3f_t position;
} transform_t;

typedef struct {
  vec3f_t centre;
  f32 radius;
} bounding_sphere_t;

typedef struct {
  model_t *model;
  transform_t transform;
} instance_t;

typedef struct {
  vec3f_t normal;
  f32 distance;
} clipping_plane_t;

#define CLIPPING_PLANE_COUNT 5
typedef struct {
  u64 instance_count;
  instance_t *instances;
  camera_t *camera;
  const mat3x4f_t *proj_matrix;
  clipping_plane_t planes[CLIPPING_PLANE_COUNT];
} rasteriser_scene_t;

void render_scene(window_t *wnd, Arena *arena, const rasteriser_scene_t *scene,
                  render_type_t type);
void draw_wireframe_triangle(window_t *wnd, Arena *arena, triangle_t triangle);
void draw_filled_triangle(window_t *wnd, Arena *arena, triangle_t triangle);
void draw_shaded_triangle(window_t *wnd, Arena *arena, triangle_t triangle);
void draw_line(window_t *wnd, Arena *arena, line_t line, colour_t colour);
bool is_null_model(const model_t *model);

#endif // !RASTERISER_H