#include "konprogram.h"

/* the starting point for a game. with the 3d module (./build.sh -m 3d) it is a spinning cube, without it a square that bounces around */

typedef struct demo {
#ifdef KONSOFREN_3D
	kon_camera_t camera;
	kon_material_t material;
	kon_light_t light;
	int ortho;
#else
	float x, y, vx, vy;
#endif
	float angle;
} demo_t;

static int init(kon_program_t *program, void *user)
{
	demo_t *demo = user;

	(void)program;
#ifdef KONSOFREN_3D
	demo->camera = kon_cameraDefault();
	demo->camera.position = KON_VEC3(3, 3, 6);
	demo->material = kon_materialColor(0xFFC8C8FF);
	demo->light = kon_lightDefault();
#else
	demo->x = 40.0f;
	demo->y = 30.0f;
	demo->vx = 70.0f;
	demo->vy = 50.0f;
#endif
	return 1;
}

static int event(kon_program_t *program, const kon_event_t *ev, void *user)
{
	(void)program;
#ifdef KONSOFREN_3D
	{
		demo_t *demo = user;

		if (ev->type == KON_EVENT_KEY_DOWN && ev->key == KON_KEY_O) {
			demo->ortho = !demo->ortho;
			demo->camera.projection = demo->ortho ? KON_PROJECTION_ORTHOGRAPHIC : KON_PROJECTION_PERSPECTIVE;
			return 1;
		}
	}
#else
	(void)ev; (void)user;
#endif
	return 0;
}

static void update(kon_program_t *program, double dt, void *user)
{
	demo_t *demo = user;

	demo->angle += (float)dt;
#ifndef KONSOFREN_3D
	demo->x += demo->vx * (float)dt;
	demo->y += demo->vy * (float)dt;
	if (demo->x < 0.0f || demo->x > (float)program->display->game->width - 24.0f) demo->vx = -demo->vx;
	if (demo->y < 0.0f || demo->y > (float)program->display->game->height - 24.0f) demo->vy = -demo->vy;
#else
	(void)program;
#endif
}

static void draw(kon_program_t *program, kon_framebuffer_t *game, void *user)
{
	demo_t *demo = user;

	(void)program;
#ifdef KONSOFREN_3D
	{
		kon_mat4_t model = kon_mat4Rotate(kon_mat4Identity(), KON_VEC3(demo->angle * 0.5f, demo->angle, 0));
		kon_mat4_t viewProjection = kon_cameraViewProjection(&demo->camera, game->width, game->height);

		kon_drawMesh(game, viewProjection, model, &kon_cubeMesh, &demo->material, &demo->light, KON_RENDER_DEFAULT);
	}
#else
	kon_fillRectangle(game, (int)demo->x, (int)demo->y, 24, 24, 0xFFF2A7C3);
#endif
}

int main(void)
{
	demo_t demo = {0};
	kon_programConfig_t config = {0};

	config.title = "engine";
	config.user = &demo;
	config.init = init;
	config.event = event;
	config.update = update;
	config.draw = draw;
	return kon_programRun(&config);
}