Trigger wave_end event on creeps reaching portal

Scenes/Creeps/Creep.gd

@@ -5,6 +5,7 @@ extends Unit
 # TODO: implement armor
 
 signal moved(delta)
+signal reached_portal(damage_to_portal)
 
 
 # NOTE: order is important to be able to compare
@@ -99,6 +100,10 @@ func adjust_height(height: float, speed: float):
 		Vector2(_visual.position.x, _visual.position.y - height),
 		duration).set_trans(Tween.TRANS_LINEAR).set_ease(Tween.EASE_OUT)
 
+func reach_portal():
+	var damage_to_portal = get_damage_to_portal()
+	reached_portal.emit(damage_to_portal)
+	queue_free()
 
 #########################
 ###      Private      ###
@@ -222,3 +227,7 @@ func get_display_name() -> String:
 func set_path(path: Path2D):
 	_path = path
 	position = path.get_curve().get_point_position(0) + path.position
+
+func get_damage_to_portal():
+	# TODO: Implement formula
+	return 1

Scenes/Creeps/CreepSpawner.gd

@@ -89,6 +89,7 @@ func generate_creep_for_wave(wave: Wave, creep_size) -> Creep:
 	creep.set_category(wave.get_race())
 	creep.set_base_health(wave.get_base_hp())
 	creep.death.connect(Callable(wave, "_on_Creep_death"))
+	creep.reached_portal.connect(Callable(wave, "_on_Creep_reached_portal").bind(creep))
 	return creep
 
 

Scenes/Creeps/Wave.gd

@@ -63,8 +63,13 @@ func _process(_delta):
 #########################
 
 func _on_Creep_death(event):
+	print_debug("Creep [%s] has died." % event.get_target())
 	_creeps.erase(event.get_target())
 
+func _on_Creep_reached_portal(damage, creep: Creep):
+	print_debug("Creep [%s] reached portal. Damage to portal: %s" % [creep, damage])
+	_creeps.erase(creep)
+
 
 #########################
 ### Setters / Getters ###

Scenes/GameScene.gd

@@ -18,7 +18,7 @@ func _on_HUD_stop_wave():
 
 func _on_CreepExit_body_entered(body):
 	if body is Creep:
-		body.queue_free()
+		body.reach_portal()
 
 
 func _on_CreepSpawner_wave_ended(_wave_index: int):