extends StateMachine


# Adds the intial states
func _ready():
	add_state("idle")
	add_state("run")
	add_state("walk")
	add_state("jump")
	add_state("fall")
	print_debug(states)
	set_state(states.idle)


# Calls the parent behaviours according to state
func _state_logic(delta):
	# RayCasts for visual debugging
	# TODO Global context switch for debug/build mode
	# \ is for new line in multiline statements
	parent.get_node("CollisionShape2D/RayCaster")._raycast(
		Vector2.DOWN,
		parent.get_node("CollisionShape2D").get_shape(),
		parent.collision_mask
	)

	var handle_input_ref

	match self.state:
		"idle":
			handle_input_ref = funcref(self, 'handle_idle_input')
		"walk":
			handle_input_ref = funcref(self, 'handle_walk_input')
		"run":
			handle_input_ref = funcref(self, 'handle_run_input')
		"jump":
			handle_input_ref = funcref(self, 'handle_jump_input')
		"fall":
			handle_input_ref = funcref(self, 'handle_fall_input')
		_:
			print("don't panik")

	parent._velocity = handle_input_ref.call_func(delta)
	parent.execute_movement()


func handle_idle_input(delta, direction := get_horizontal_direction()) -> Vector2:
	if Input.is_action_pressed("boost_move"):
		return parent.handle_grounded_movement(delta, direction, "run")
	else:
		return parent.handle_grounded_movement(delta, direction, "walk")


func handle_walk_input(delta, direction := get_horizontal_direction()) -> Vector2:
	return parent.handle_grounded_movement(delta, direction, state)


func handle_run_input(delta, direction := get_horizontal_direction()) -> Vector2:
	return parent.handle_grounded_movement(delta, direction, state)


func handle_jump_input(delta, direction := get_horizontal_direction()) -> Vector2:
	return parent.handle_jump_movement(delta, direction)


func handle_fall_input(delta, direction := get_horizontal_direction()) -> Vector2:
	return parent.handle_fall_movement(delta, direction)


func get_horizontal_direction() -> Vector2:
	return Vector2(
		(
			Input.get_action_strength("move_right")
			- Input.get_action_strength("move_left")
		),
		0
	)


# Determines which state should be active at the moment
func _get_transition(delta):
	parent.get_node("StateLable").text = (
		self.state
		+ " x vel:"
		+ String(round(parent._velocity.x))
	)
	var new_state
	# TODO Can get stuck in Fall on ledges
	if ! parent.is_on_floor():
		if parent._velocity.y < 0:
			new_state = states.jump
		if parent._velocity.y >= 0:
			# if self.state == states.run:
			# 	parent._velocity.y = 0
			new_state = states.fall
	elif parent._velocity.x != 0:
		if Input.is_action_pressed("boost_move"):
			new_state = states.run
		else:
			new_state = states.walk
	else:
		# TODO How does this apply to enviornment induced movement?
		new_state = states.idle
	if new_state != self.state:
		return new_state
	parent.init_boost = false
	return null


func _enter_state(new_state, old_state):
	if new_state == "run" || "walk":
		parent.init_boost = true
	if old_state == "run" && new_state == "walk":
		parent.init_boost = false


func _exit_state(old_state, new_state):
	pass