#include <allegro5/allegro.h>
#include <allegro5/allegro_primitives.h>
#include <stdio.h>
#include <math.h>

#include <rb.h>
#include <spaceship.h>

void
rb_ship_init(struct spaceship *sp)
{
	sp->x		 = RB_X_CENTER;
	sp->y		 = RB_Y_CENTER;
	sp->heading	 = 0;
	sp->speed	 = 3;
	sp->rot_velocity = 1;
	sp->scale	 = 0;
	sp->alive	 = 1;
	sp->color	 = al_map_rgb(255, 255, 255);
	printf("ship initialized\n");
}

void
rb_ship_accelerate(struct spaceship *sp)
{
	sp->x += sin(sp->heading * ALLEGRO_PI / 180) * sp->speed;
	if (sp->x >= RB_WIDTH)
		sp->x = 0;
	if (sp->x < 0)
		sp->x = RB_WIDTH;
	sp->y += -cos(sp->heading * ALLEGRO_PI / 180) * sp->speed;
	if (sp->y >= RB_HEIGHT)
		sp->y = 0;
	if (sp->y < 0)
		sp->y = RB_HEIGHT;
}

void
rb_ship_rotate_left(struct spaceship *sp)
{
	if (sp->heading == 0)
		sp->heading = 360;

	sp->heading -= sp->rot_velocity;

}

void
rb_ship_rotate_right(struct spaceship *sp)
{
	if (sp->heading >= 360)
		sp->heading = 0;

	sp->heading += sp->rot_velocity;

}

void
rb_draw_ship(struct spaceship *sp)
{
	float scale = 1.9;
	ALLEGRO_TRANSFORM t;
	al_build_transform(&t,sp->x, sp->y, scale, scale,
			   (ALLEGRO_PI) / 180 * sp->heading);

	al_use_transform(&t);

	al_draw_line(-8, 9, 0, -11, sp->color, 3.0f);
	al_draw_line(0, -11, 8, 9,  sp->color, 3.0f);
	al_draw_line(-6, 4, -1, 4,  sp->color, 3.0f);
	al_draw_line(6, 4, 1, 4, sp->color, 3.0f);
}