extends StateMachine

signal got_grounded


# Adds the intial states
func _ready():
	add_state("deactivated")
	add_state("searching")
	add_state("hunting")
	add_state("locking")
	add_state("shooting")
	state = states.searching
	set_state(states.searching)


# Calls the parent behaviours according to state
func _state_logic(_delta):
	var state_action_ref = "handle_deactivated_state"
	match self.state:
		"deactivated":
			state_action_ref = funcref(self, "handle_deactivated_state")
		"searching":
			state_action_ref = funcref(self, "handle_searching_state")
		"locking":
			state_action_ref = funcref(self, "handle_locking_state")
		"shooting":
			state_action_ref = funcref(self, "handle_shooting_state")
		_:
			state_action_ref = funcref(self, "handle_deactivated_state")
			print("don't panik")

	state_action_ref.call_func()


func handle_searching_state():
	parent.searching()


# Locking is intialized once when starting
# While the locking is handled by a Time/Turret, this method just passes
func handle_locking_state():
	pass


func handle_shooting_state():
	parent.shooting()


# Determines which state should be active at the moment
func _get_transition(_delta):
	# TODO why only this way?
	parent.get_node("StateLabel").text = self.state
	var new_state
	if parent.prey != null && self.state == "searching":
		parent.start_locking()
		new_state = "locking"
	if self.state == "locking" && parent.is_locked_on_target():
		new_state = "shooting"
	if new_state != self.state:
		return new_state

	return null


func _enter_state(new_state, old_state):
	if old_state == "idle" && (new_state == "walk" || new_state == "run"):
		pass
	# TODO This may be hard to keep track of if many states are added
	if !["run", "walk", "idle"].has(old_state) && parent.is_on_floor():
		emit_signal("got_grounded")


func _exit_state(old_state, new_state):
	pass