extends Camera3D


const SCREEN_MARGIN : int = 50
const SCREEN_MOVEMENT_SPEED : float = .05

@export var curve : Curve


func _ready() -> void:
	curve.bake()


func _process(_delta: float) -> void:
	var windowSize : Vector2i = get_window().size
	var mousePosition : Vector2 = get_viewport().get_mouse_position()

	if mousePosition.x < SCREEN_MARGIN:
		position.x += -SCREEN_MOVEMENT_SPEED
	if mousePosition.y < SCREEN_MARGIN:
		position.z += -SCREEN_MOVEMENT_SPEED
	if mousePosition.x > windowSize.x - SCREEN_MARGIN:
		position.x += SCREEN_MOVEMENT_SPEED
	if mousePosition.y > windowSize.y - SCREEN_MARGIN:
		position.z += SCREEN_MOVEMENT_SPEED


func _input(event: InputEvent) -> void:
	if not event is InputEventMouseButton:
		return

	var newPosition : float = position.y
	if event.button_index == MOUSE_BUTTON_WHEEL_UP:
		newPosition = clampf(newPosition - .2, curve.min_value, curve.max_value)
	elif event.button_index == MOUSE_BUTTON_WHEEL_DOWN:
		newPosition = clampf(newPosition + .2, curve.min_value, curve.max_value)

	rotation.x = deg_to_rad(curve.sample(newPosition))
	position.y = newPosition