class_name CardStack
extends Node3D

var _card_height: float = 0.02

@export var playing_card_scene: PackedScene

## Surface for allowing peeking at the played cards by hovering the mouse.
@export var peek_surface: Area3D

var _is_expanded: bool = false

func _ready() -> void:
	if peek_surface:
		peek_surface.mouse_entered.connect(_peek_mouse_entered)
		peek_surface.mouse_exited.connect(_peek_mouse_exited)

func add_card(card: PlayingCard) -> void:
	var height = self.get_child_count() * _card_height
	self.add_child(card)
	card.rotate(Vector3.FORWARD, randf_range(-0.3, 0.3))
	card.translate(Vector3.BACK * height)

func add_card_by_id(card_id: int) -> void:
	var playing_card: PlayingCard = playing_card_scene.instantiate()
	playing_card.setup_card_details(card_id)
	add_card(playing_card)

func purge_cards() -> void:
	while get_child_count() > 0:
		remove_child(get_children()[get_child_count() - 1])

func _peek_mouse_entered() -> void:
	if get_child_count() > 1:
		var index = 0
		var child_count = get_child_count()
		for child: Node3D in get_children():
			create_tween().set_trans(Tween.TRANS_CUBIC).set_ease(Tween.EASE_OUT).tween_property(
				child,
				"position",
				Vector3(0.2, index * -0.42 - (((child_count - 1) * -0.42) / 2.0), _card_height * index),
				0.3,
			)
			index += 1
		_is_expanded = true

func _peek_mouse_exited() -> void:
	if _is_expanded:
		var index = 0
		for child: Node3D in get_children():
			create_tween().set_trans(Tween.TRANS_CUBIC).set_ease(Tween.EASE_OUT).tween_property(
				child,
				"position",
				Vector3(0.0, 0.0, _card_height * index),
				0.3,
			)
			index += 1
		_is_expanded = false