extends CanvasLayer

signal finished

@onready var paperback = %"封面"
@onready var paper = %"页面"
@onready var p1 = %"p1"
@onready var signature = %"陆小蝶"

var mode := 0:
	set(value):
		mode = value
		match mode:
			0:
				open_paperback()
			1:
				open_p1()
			2:
				open_signature()
		mode = clampi(mode, 0, 3)
		if mode == 0:
			%ButtonPaperback.visible = true
			%ButtonLeft.visible = false
			%ButtonRight.visible = false
		else:
			%ButtonPaperback.visible = false
			%ButtonLeft.visible = true
			%ButtonRight.visible = true


func _ready() -> void:
	# 盖在书架上层，所以 +1
	layer = GlobalConfig.CANVAS_LAYER_LITTLE_GAME + 1
	mode = 0
	%ButtonPaperback.pressed.connect(_on_button_pressed.bind(1))
	# 从右到左翻页，所以右侧-1，左侧+1
	%ButtonLeft.pressed.connect(_on_button_pressed.bind(1))
	%ButtonRight.pressed.connect(_on_button_pressed.bind(-1))
	signature.finished.connect(finished.emit)
	visibility_changed.connect(_on_visibility_changed)
	

func _on_visibility_changed() -> void:
	if visible:
		create_tween().tween_property($Control, "modulate:a", 1.0, 1.0).from(0.0)


var press_time := 0.0

func _on_button_pressed(direction: int) -> void:
	# 0: paperback, 1: p1, 2: signature
	# 第二页后不再翻页
	if mode >= 2:
		return
	if Time.get_ticks_msec() - press_time < 1000:
		return
	press_time = Time.get_ticks_msec()
	mode += direction

func open_paperback() -> void:
	$SfxPage.play()
	paperback.visible = true
	paper.visible = false
	p1.visible = false
	signature.visible = false

func open_p1() -> void:
	$SfxPage.play()
	paperback.visible = false
	paper.visible = true
	p1.visible = true
	signature.visible = false

func open_signature() -> void:
	$SfxPage.play()
	paperback.visible = false
	paper.visible = true
	p1.visible = false
	signature.visible = true
	signature.play()