extends KinematicBody2D

var analog_stick_center
var analog_stick_pos

func _ready():
	set_fixed_process(true)
	set_process_input(true)

func _input(event):
	if (event.type == InputEvent.SCREEN_TOUCH):
		if event.is_pressed():
		  analog_stick_center = event.global_pos
		else:
			analog_stick_center = null
			analog_stick_pos = null
	elif (event.type == InputEvent.SCREEN_DRAG):
		analog_stick_pos = event.global_pos

func _fixed_process(delta):
  relative_directional_movement(delta)

func relative_directional_movement(delta):
	if analog_stick_pos != null && analog_stick_center != null:
    var pos_vector = analog_stick_pos - analog_stick_center
    if pos_vector.length() > MOUSE_WALK_THRESHOLD:
      var target_pos = get_global_pos() + pos_vector
      move_in_rect_line_towards(target_pos)

func move_in_rect_line_towards(pos):
	var angle = get_global_pos().angle_to_point(pos)
	var motion = move(Vector2(0, -speed).rotated(angle))
	if (is_colliding()):
		slide(motion)

func slide(motion, apply_friction=true):
	# You can check which tile was collision against with this
	# print(get_collider_metadata())

	# Ran against something, is it the floor? Get normal
	var n = get_collision_normal()

	# For every other case of motion, our motion was interrupted.
	# Try to complete the motion by "sliding" by the normal

	var new_motion = n.slide(motion)


	if not apply_friction:
    # Ignore collision friction
		var current_angle = motion.angle()
		var slide_angle = new_motion.angle()
		new_motion = motion.rotated(slide_angle - current_angle)

	move(new_motion)