extends Camera2D

class_name RecurionCamera

@export var movement_speed: float = 1

var mouse_pos_a: Vector2 = Vector2.ZERO
var mouse_pos_b: Vector2 = Vector2.ZERO


func _process(delta: float) -> void:
	process_keyboard_input(delta)
	process_mouse_input()


func process_keyboard_input(delta: float):
	var direction: Vector2 = Vector2.ZERO

	if (Input.is_action_pressed("w")):
		direction += Vector2.UP
	if (Input.is_action_pressed("s")):
		direction += Vector2.DOWN
	if (Input.is_action_pressed("a")):
		direction += Vector2.LEFT
	if (Input.is_action_pressed("d")):
		direction += Vector2.RIGHT
	direction = direction.normalized() * movement_speed
	position += direction * delta * 100


func process_mouse_input():
	if (Input.is_action_just_pressed("mouse_down")):
		mouse_pos_a = get_global_mouse_position()
		mouse_pos_b = mouse_pos_a

	elif (Input.is_action_pressed("mouse_down")):
		mouse_pos_b = get_global_mouse_position()

		position = mouse_pos_a - mouse_pos_b + position

	elif (Input.is_action_just_released("mouse_down")):
		mouse_pos_a = Vector2.ZERO
		mouse_pos_b = Vector2.ZERO

	mouse_pos_b = mouse_pos_a


func _input(event: InputEvent) -> void:
	if (event is InputEventMouseButton):
		var zoom_value = Input.get_axis("scroll_down", "scroll_up")
		if (zoom.y + zoom_value > 0.0):
			zoom += Vector2.ONE * zoom_value