+#include <stdlib.h>
+#include <stddef.h>
+#include "../game/game.h"
+
+static struct entity fireball;
+
+struct fireball_data
+{
+ double timer;
+ int vx;
+ int vy;
+};
+
+static void fireball_spawn(struct entity *self, void *data)
+{
+ self->meta = malloc(sizeof(struct fireball_data));
+ *((struct fireball_data *) self->meta) = *((struct fireball_data *) data);
+}
+
+static void fireball_step(struct entity *self, struct entity_step_data stepdata)
+{
+ struct fireball_data *data = self->meta;
+
+ if (stepdata.visible && (data->timer -= stepdata.dtime) <= 0.0) {
+ data->timer = 0.1;
+ move(self, data->vx, data->vy);
+ }
+}
+
+static void fireball_collide(struct entity *self, int x, int y)
+{
+ (void) x, y;
+
+ self->remove = true;
+}
+
+static void fireball_collide_with_entity(struct entity *self, struct entity *other)
+{
+ add_health(other, -(1 + rand() % 3));
+ self->remove = true;
+}
+
+static bool try_shoot(int x, int y, int vx, int vy)
+{
+ x += vx;
+ y += vy;
+
+ return spawn(fireball, x, y, & (struct fireball_data) {
+ .timer = 0.1,
+ .vx = vx,
+ .vy = vy,
+ });
+}
+
+static void shoot_fireball()
+{
+ int x, y;
+
+ x = player.x;
+ y = player.y;
+
+ for (int tries = 10; tries > 0; tries--) {
+ int vx, vy;
+
+ vx = vy = 0;
+
+ dir_to_xy(rand() % 4, &vx, &vy);
+
+ if (try_shoot(x, y, vx, vy))
+ return;
+ }
+}
+
+__attribute__((constructor)) static void init()
+{
+ fireball = (struct entity) {
+ .name = "fireball",
+ .x = 0,
+ .y = 0,
+ .color = get_color("#FF6611"),
+ .texture = "⬤ ",
+ .remove = false,
+ .meta = NULL,
+ .health = 1,
+ .max_health = 1,
+ .collide_with_entities = true,
+
+ .on_step = &fireball_step,
+ .on_collide = &fireball_collide,
+ .on_collide_with_entity = &fireball_collide_with_entity,
+ .on_spawn = &fireball_spawn,
+ .on_remove = NULL,
+ .on_death = NULL,
+ .on_damage = NULL,
+ };
+
+ register_input_handler(' ', (struct input_handler) {
+ .run_if_dead = false,
+ .callback = &shoot_fireball,
+ });
+}