package collision

type World struct {
	Entities []Collidable
}

func (w *World) AddEntity(e Collidable) {
	w.Entities = append(w.Entities, e)
}

func (w *World) RemoveEntity(e Collidable) {
	for i, entity := range w.Entities {
		if entity == e {
			w.Entities = append(w.Entities[:i], w.Entities[i+1:]...)
		}
	}
}

func (w *World) NotifyAboutCollisions() {
	for i, entity := range w.Entities {
		for j, other := range w.Entities {
			if i == j {
				continue
			}
			if entity.CollisionShape().Overlaps(other.CollisionShape()) {
				entity.HandleCollisionEvent(other)
				other.HandleCollisionEvent(entity)
			}
		}
	}
}

func NewWorld() *World {
	return &World{}
}