extends CanvasLayer
class_name WelcomeDialog

const GUIDE_PAGES: Array[Dictionary] = [
	{
		"text": "欢迎来到 [color=#3399ff]Datawhale Town[/color]!\n\n这里是开源学习者的家园。在这里，我们一同探索知识，分享成长。\n\n[center]WhaleTown[/center]",
		"image_path": "res://assets/maps/square/v1/props/bottom_entrance_left_task_props_v2_hd_clean.png",
	},
	{
		"text": "最新活动：\n\n- 镇长在公会大厅附近接待新伙伴。\n- 码头区域已经开放，可以和码头 NPC 交流。\n- 广场公告板后续会同步线上新闻动态。",
		"image_path": "res://assets/maps/square/v1/props/center_whale_fountain_v2_hd_clean.png",
	},
	{
		"text": "操作提示：\n\n- 按 [color=#ffaa00]E[/color] 键可以与 NPC、公告板和信息板互动。\n- 靠近目标后面向它，再按互动键。\n- 按 [color=#ffaa00]Esc[/color] 可以关闭当前界面或结束当前互动。\n- 输入框获得焦点时，角色移动会暂停响应。",
		"image_path": "res://assets/maps/square/v1/props/bottom_entrance_right_service_props_v2_hd_clean.png",
	},
]

@onready var panelContainer: PanelContainer = $CenterContainer/PanelContainer
@onready var vboxContainer: VBoxContainer = $CenterContainer/PanelContainer/VBoxContainer
@onready var titleLabel: Label = $CenterContainer/PanelContainer/VBoxContainer/Header/Title
@onready var logoContainer: PanelContainer = $CenterContainer/PanelContainer/VBoxContainer/LogoContainer
@onready var bodyText: Label = $CenterContainer/PanelContainer/VBoxContainer/BodyText
@onready var actionContainer: CenterContainer = $CenterContainer/PanelContainer/VBoxContainer/ActionContainer

var _chatUi: Control
var _chatUiPrevMouseFilter: Control.MouseFilter = Control.MOUSE_FILTER_STOP
var _chatUiMouseDisabled: bool = false
var _guideContentContainer: HBoxContainer
var _guideImageRect: TextureRect
var _guideImageLabel: Label
var _guideContentLabel: RichTextLabel
var _guideFooter: HBoxContainer
var _guidePrevButton: Button
var _guideNextButton: Button
var _guideDotsContainer: HBoxContainer
var _guideTaskBookButton: Button
var _guideCurrentPage: int = 0
var _guideTween: Tween

func _ready() -> void:
	add_to_group("whaletown_escape_dismissible")
	_disableChatUiMouseInput()

	var closeButton := find_child("CloseButton", true, false) as Button
	if closeButton != null:
		closeButton.pressed.connect(_onClosePressed)

	var startButton := find_child("StartButton", true, false) as Button
	if startButton != null:
		startButton.pressed.connect(_onStartPressed)

func _exit_tree() -> void:
	_restoreChatUiMouseInput()

func _input(event: InputEvent) -> void:
	if get_viewport().is_input_handled():
		return
	if event.is_action_pressed("ui_cancel"):
		queue_free()
		get_viewport().set_input_as_handled()

func is_escape_dismissible() -> bool:
	return is_inside_tree()

func get_escape_priority() -> int:
	return 980

func request_escape_close() -> void:
	queue_free()

func _onClosePressed() -> void:
	queue_free()

func _onStartPressed() -> void:
	_showGuide()

func _showGuide() -> void:
	var taskManager := get_node_or_null("/root/TaskManager")
	if taskManager != null and taskManager.has_method("report_activity"):
		taskManager.call("report_activity", "guide_opened")
	panelContainer.custom_minimum_size = Vector2(720, 560)
	titleLabel.text = "新人引导手册"
	logoContainer.visible = false
	bodyText.visible = false
	actionContainer.visible = false

	if _guideContentContainer == null:
		_buildGuideUi()

	_guideContentContainer.visible = true
	_guideFooter.visible = true
	_guideCurrentPage = 0
	_setupGuideDots()
	_updateGuideUi(false)

func _buildGuideUi() -> void:
	_guideContentContainer = HBoxContainer.new()
	_guideContentContainer.name = "GuideContentContainer"
	_guideContentContainer.custom_minimum_size = Vector2(0, 360)
	_guideContentContainer.size_flags_vertical = Control.SIZE_EXPAND_FILL
	_guideContentContainer.add_theme_constant_override("separation", 22)
	vboxContainer.add_child(_guideContentContainer)

	var imagePanel := PanelContainer.new()
	imagePanel.name = "ImagePanel"
	imagePanel.custom_minimum_size = Vector2(322, 0)
	imagePanel.size_flags_vertical = Control.SIZE_EXPAND_FILL
	imagePanel.add_theme_stylebox_override("panel", _createImageStyle())
	_guideContentContainer.add_child(imagePanel)

	_guideImageRect = TextureRect.new()
	_guideImageRect.name = "ImageRect"
	_guideImageRect.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	_guideImageRect.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
	imagePanel.add_child(_guideImageRect)

	_guideImageLabel = Label.new()
	_guideImageLabel.name = "ImageLabel"
	_guideImageLabel.text = "暂无图片"
	_guideImageLabel.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	_guideImageLabel.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
	_guideImageLabel.add_theme_color_override("font_color", Color(0.43, 0.48, 0.45, 1.0))
	_guideImageLabel.add_theme_font_size_override("font_size", 18)
	imagePanel.add_child(_guideImageLabel)

	var textPanel := PanelContainer.new()
	textPanel.name = "TextPanel"
	textPanel.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	textPanel.size_flags_vertical = Control.SIZE_EXPAND_FILL
	textPanel.add_theme_stylebox_override("panel", _createTextStyle())
	_guideContentContainer.add_child(textPanel)

	_guideContentLabel = RichTextLabel.new()
	_guideContentLabel.name = "ContentLabel"
	_guideContentLabel.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	_guideContentLabel.size_flags_vertical = Control.SIZE_EXPAND_FILL
	_guideContentLabel.bbcode_enabled = true
	_guideContentLabel.fit_content = true
	_guideContentLabel.scroll_active = false
	_guideContentLabel.add_theme_color_override("default_color", Color(0.18, 0.2, 0.18, 1.0))
	_guideContentLabel.add_theme_font_size_override("normal_font_size", 21)
	textPanel.add_child(_guideContentLabel)

	_guideFooter = HBoxContainer.new()
	_guideFooter.name = "GuideFooter"
	_guideFooter.custom_minimum_size = Vector2(0, 58)
	_guideFooter.alignment = BoxContainer.ALIGNMENT_CENTER
	_guideFooter.add_theme_constant_override("separation", 22)
	vboxContainer.add_child(_guideFooter)

	_guidePrevButton = _createGuideButton("<")
	_guidePrevButton.name = "PrevButton"
	_guidePrevButton.pressed.connect(_onGuidePrevPressed)
	_guideFooter.add_child(_guidePrevButton)

	_guideDotsContainer = HBoxContainer.new()
	_guideDotsContainer.name = "DotsContainer"
	_guideDotsContainer.custom_minimum_size = Vector2(88, 0)
	_guideDotsContainer.alignment = BoxContainer.ALIGNMENT_CENTER
	_guideDotsContainer.add_theme_constant_override("separation", 10)
	_guideFooter.add_child(_guideDotsContainer)

	_guideNextButton = _createGuideButton(">")
	_guideNextButton.name = "NextButton"
	_guideNextButton.pressed.connect(_onGuideNextPressed)
	_guideFooter.add_child(_guideNextButton)

	_guideTaskBookButton = _createGuideButton("任务书")
	_guideTaskBookButton.name = "TaskBookButton"
	_guideTaskBookButton.custom_minimum_size = Vector2(96, 44)
	_guideTaskBookButton.pressed.connect(_onGuideTaskBookPressed)
	_guideFooter.add_child(_guideTaskBookButton)

func _createGuideButton(text: String) -> Button:
	var button := Button.new()
	button.custom_minimum_size = Vector2(56, 44)
	button.text = text
	button.add_theme_color_override("font_color", Color.WHITE)
	button.add_theme_font_size_override("font_size", 22)
	button.add_theme_stylebox_override("normal", _createButtonStyle(Color(0.2, 0.43, 0.48, 1.0)))
	button.add_theme_stylebox_override("hover", _createButtonStyle(Color(0.28, 0.52, 0.55, 1.0)))
	button.add_theme_stylebox_override("pressed", _createButtonStyle(Color(0.28, 0.52, 0.55, 1.0)))
	button.add_theme_stylebox_override("disabled", _createButtonStyle(Color(0.72, 0.76, 0.72, 1.0)))
	return button

func _createImageStyle() -> StyleBoxFlat:
	var style := StyleBoxFlat.new()
	style.content_margin_left = 10.0
	style.content_margin_top = 10.0
	style.content_margin_right = 10.0
	style.content_margin_bottom = 10.0
	style.bg_color = Color(0.875, 0.93, 0.92, 1.0)
	style.border_width_left = 2
	style.border_width_top = 2
	style.border_width_right = 2
	style.border_width_bottom = 2
	style.border_color = Color(0.55, 0.68, 0.64, 1.0)
	style.corner_radius_top_left = 10
	style.corner_radius_top_right = 10
	style.corner_radius_bottom_right = 10
	style.corner_radius_bottom_left = 10
	return style

func _createTextStyle() -> StyleBoxFlat:
	var style := StyleBoxFlat.new()
	style.content_margin_left = 20.0
	style.content_margin_top = 18.0
	style.content_margin_right = 20.0
	style.content_margin_bottom = 18.0
	style.bg_color = Color(1.0, 0.985, 0.935, 1.0)
	style.border_width_left = 1
	style.border_width_top = 1
	style.border_width_right = 1
	style.border_width_bottom = 1
	style.border_color = Color(0.78, 0.7, 0.55, 1.0)
	style.corner_radius_top_left = 10
	style.corner_radius_top_right = 10
	style.corner_radius_bottom_right = 10
	style.corner_radius_bottom_left = 10
	return style

func _createButtonStyle(color: Color) -> StyleBoxFlat:
	var style := StyleBoxFlat.new()
	style.content_margin_left = 16.0
	style.content_margin_top = 8.0
	style.content_margin_right = 16.0
	style.content_margin_bottom = 8.0
	style.bg_color = color
	style.corner_radius_top_left = 8
	style.corner_radius_top_right = 8
	style.corner_radius_bottom_right = 8
	style.corner_radius_bottom_left = 8
	return style

func _setupGuideDots() -> void:
	for child in _guideDotsContainer.get_children():
		child.queue_free()

	for index in range(GUIDE_PAGES.size()):
		var dot := ColorRect.new()
		dot.custom_minimum_size = Vector2(12, 12)
		_guideDotsContainer.add_child(dot)

func _updateGuideUi(animate: bool = true) -> void:
	_guidePrevButton.disabled = _guideCurrentPage == 0
	_guideNextButton.disabled = _guideCurrentPage == GUIDE_PAGES.size() - 1

	var dots := _guideDotsContainer.get_children()
	for index in range(dots.size()):
		var dot := dots[index] as ColorRect
		if dot == null:
			continue
		if index == _guideCurrentPage:
			dot.color = Color(0.15, 0.36, 0.44, 1.0)
			dot.custom_minimum_size = Vector2(18, 12)
		else:
			dot.color = Color(0.72, 0.78, 0.72, 1.0)
			dot.custom_minimum_size = Vector2(12, 12)

	if animate:
		_animateGuideContentChange()
	else:
		_setGuideContentImmediate()

func _setGuideContentImmediate() -> void:
	var page := GUIDE_PAGES[_guideCurrentPage]
	_guideContentLabel.text = page.get("text", "") as String

	var imagePath := page.get("image_path", "") as String
	if imagePath != "" and ResourceLoader.exists(imagePath):
		_guideImageRect.texture = load(imagePath) as Texture2D
		_guideImageLabel.visible = false
	else:
		_guideImageRect.texture = null
		_guideImageLabel.visible = true
		_guideImageLabel.text = "暂无图片"

func _animateGuideContentChange() -> void:
	if _guideTween != null and _guideTween.is_valid():
		_guideTween.kill()

	_guideTween = create_tween()
	_guideTween.tween_property(_guideContentContainer, "modulate:a", 0.0, 0.15)
	_guideTween.tween_callback(_setGuideContentImmediate)
	_guideTween.tween_property(_guideContentContainer, "modulate:a", 1.0, 0.15)

func _onGuidePrevPressed() -> void:
	if _guideCurrentPage > 0:
		_guideCurrentPage -= 1
		_updateGuideUi()

func _onGuideNextPressed() -> void:
	if _guideCurrentPage < GUIDE_PAGES.size() - 1:
		_guideCurrentPage += 1
		_updateGuideUi()

func _onGuideTaskBookPressed() -> void:
	var taskBook := get_node_or_null("/root/TaskBookPanel")
	if taskBook != null and taskBook.has_method("show_panel"):
		taskBook.call("show_panel")
		queue_free()

func _disableChatUiMouseInput() -> void:
	var currentScene := get_tree().current_scene
	if currentScene != null:
		_chatUi = currentScene.get_node_or_null("UILayer/ChatUI") as Control

	if _chatUi == null:
		_chatUi = get_tree().root.find_child("ChatUI", true, false) as Control

	if _chatUi != null:
		_chatUiPrevMouseFilter = _chatUi.mouse_filter
		_chatUi.mouse_filter = Control.MOUSE_FILTER_IGNORE
		_chatUiMouseDisabled = true

func _restoreChatUiMouseInput() -> void:
	if _chatUiMouseDisabled and is_instance_valid(_chatUi):
		_chatUi.mouse_filter = _chatUiPrevMouseFilter

	_chatUiMouseDisabled = false
	_chatUi = null