@tool
extends Button

@export var packed_scene: PackedScene:
	set(val):
		packed_scene = val
		if is_node_ready():
			_reload_scene()

@export var title: String:
	set(val):
		title = val
		if is_node_ready():
			title_label.text = val

@export_tool_button("重载场景") var reload = _reload_scene

@onready var title_label = %Title as Label
@onready var scene_panel = %ScenePanel as Control
@onready var display_layer = %DisplayLayer as CanvasLayer


func _ready() -> void:
	display_layer.layer = GlobalConfig.CANVAS_LAYER_GALLERY_CARD
	title_label.text = title
	_reload_scene()
	mouse_entered.connect(_on_toggle_hover.bind(true))
	mouse_exited.connect(_on_toggle_hover.bind(false))
	pressed.connect(_on_pressed)


var current_scene: Node2D


func _reload_scene():
	if current_scene:
		current_scene.queue_free()
	if not packed_scene:
		return
	current_scene = packed_scene.instantiate()
	scene_panel.add_child(current_scene)
	current_scene.scale = Vector2(0.2, 0.2)


func _on_toggle_hover(focus: bool):
	if current_scene and not displaying:
		current_scene.toggle_card(focus)


var displaying = false:
	set(val):
		displaying = val
		%ControlMask.visible = val


func _on_pressed():
	if displaying:
		return
	displaying = true
	if current_scene:
		current_scene.reparent(display_layer)
		current_scene.scale = Vector2(1, 1)
		current_scene.position = Vector2.ZERO
		current_scene.display()
		current_scene.display_finished.connect(_on_display_finished, CONNECT_ONE_SHOT)


func _on_display_finished():
	displaying = false
	_reload_scene()


func _unhandled_input(event: InputEvent) -> void:
	if event.is_action_released("cancel") or event.is_action_released("escape"):
		if displaying:
			_on_display_finished()
			get_viewport().set_input_as_handled()