extends Control

## Lightweight public announcement HUD.
## This panel owns only the public feed; private conversations remain in ChatUI.

const PANEL_WIDTH := 560.0
const COLLAPSED_HEIGHT := 68.0
const EXPANDED_HEIGHT := 492.0
const EDGE_MARGIN := 26.0
const TEXT_COLOR := Color("24476f")
const MUTED_COLOR := Color("7894b2")
const ACCENT_COLOR := Color("2d94ed")
const SURFACE_COLOR := Color(0.985, 0.995, 1.0, 0.97)
const LINE_COLOR := Color("d9e8f7")
const MAX_ITEMS := 24

const ICON_EMPTY := preload("res://assets/ui/world_bulletin/community/empty_whale.png")
const ICON_BROADCAST := preload("res://assets/ui/world_bulletin/community/world_bulletin_icon_hd_simple_tight.png")
const ICON_BANNER := preload("res://assets/ui/world_bulletin/community/town_banner.png")
const ICON_PIN := preload("res://assets/ui/world_bulletin/community/pinned_note.png")
const ICON_RECRUIT := preload("res://assets/ui/world_bulletin/community/recruit_whales.png")
const ICON_SEND_BUTTON := preload("res://assets/ui/world_bulletin/world_bulletin_send_button_final_192.png")

var _panel: PanelContainer
var _surface_root: VBoxContainer
var _ticker_row: HBoxContainer
var _ticker: Button
var _expand_button: Button
var _content: VBoxContainer
var _header_title: Label
var _header_icon: TextureRect
var _header_banner: TextureRect
var _entries: VBoxContainer
var _scroll: ScrollContainer
var _composer: LineEdit
var _send_button: Button
var _expanded := false
var _announcements: Array[Dictionary] = []
var _unread := 0
var _last_preview := "暂无新的世界公告"
var _publish_pending := false

func _ready() -> void:
	mouse_filter = Control.MOUSE_FILTER_IGNORE
	_build_ui()
	_seed_preview_items()
	_subscribe_to_events()
	_set_expanded(true, true)

func _exit_tree() -> void:
	var event_system := get_node_or_null("/root/EventSystem")
	if event_system != null:
		event_system.call("disconnect_event", EventNames.CHAT_MESSAGE_RECEIVED, _on_chat_message_received, self)
		event_system.call("disconnect_event", EventNames.CHAT_MESSAGE_SENT, _on_chat_message_sent, self)
		event_system.call("disconnect_event", EventNames.CHAT_ERROR_OCCURRED, _on_chat_error, self)

func _input(event: InputEvent) -> void:
	if event is InputEventKey:
		var key_event := event as InputEventKey
		if key_event.pressed and not key_event.echo and key_event.keycode == KEY_B and not _composer.has_focus():
			_set_expanded(not _expanded)
			get_viewport().set_input_as_handled()

func _build_ui() -> void:
	_panel = PanelContainer.new()
	_panel.name = "WorldBulletinSurface"
	_panel.mouse_filter = Control.MOUSE_FILTER_STOP
	_panel.add_theme_stylebox_override("panel", _surface_style())
	add_child(_panel)
	_panel.set_anchors_preset(Control.PRESET_BOTTOM_LEFT)
	_panel.offset_left = EDGE_MARGIN
	_panel.offset_top = -EDGE_MARGIN - COLLAPSED_HEIGHT
	_panel.offset_right = EDGE_MARGIN + PANEL_WIDTH
	_panel.offset_bottom = -EDGE_MARGIN
	_panel.grow_horizontal = Control.GROW_DIRECTION_END
	_panel.grow_vertical = Control.GROW_DIRECTION_BEGIN
	_surface_root = VBoxContainer.new()
	_surface_root.name = "SurfaceContent"
	_surface_root.add_theme_constant_override("separation", 0)
	_surface_root.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	_surface_root.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_panel.add_child(_surface_root)

	_ticker_row = HBoxContainer.new()
	_ticker_row.name = "CollapsedTickerRow"
	_ticker_row.custom_minimum_size = Vector2(PANEL_WIDTH, COLLAPSED_HEIGHT)
	_ticker_row.add_theme_constant_override("separation", 4)
	_ticker_row.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_surface_root.add_child(_ticker_row)

	_ticker = Button.new()
	_ticker.name = "CollapsedTicker"
	_ticker.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	_ticker.custom_minimum_size = Vector2(0, COLLAPSED_HEIGHT)
	_ticker.focus_mode = Control.FOCUS_NONE
	_ticker.mouse_default_cursor_shape = Control.CURSOR_POINTING_HAND
	_ticker.alignment = HORIZONTAL_ALIGNMENT_LEFT
	_ticker.add_theme_font_size_override("font_size", 20)
	_ticker.add_theme_color_override("font_color", TEXT_COLOR)
	_ticker.add_theme_color_override("font_hover_color", TEXT_COLOR)
	_ticker.add_theme_stylebox_override("normal", _empty_style())
	_ticker.add_theme_stylebox_override("hover", _hover_style())
	_ticker.add_theme_stylebox_override("pressed", _pressed_style())
	_ticker.pressed.connect(func() -> void: _set_expanded(not _expanded))
	_ticker_row.add_child(_ticker)

	_expand_button = Button.new()
	_expand_button.name = "ExpandButton"
	_expand_button.text = "展开"
	_expand_button.custom_minimum_size = Vector2(72, COLLAPSED_HEIGHT)
	_expand_button.focus_mode = Control.FOCUS_NONE
	_expand_button.mouse_default_cursor_shape = Control.CURSOR_POINTING_HAND
	_expand_button.add_theme_font_size_override("font_size", 18)
	_expand_button.add_theme_color_override("font_color", ACCENT_COLOR)
	_expand_button.add_theme_color_override("font_hover_color", TEXT_COLOR)
	_expand_button.add_theme_stylebox_override("normal", _empty_style())
	_expand_button.add_theme_stylebox_override("hover", _hover_style())
	_expand_button.add_theme_stylebox_override("pressed", _pressed_style())
	_expand_button.pressed.connect(func() -> void: _set_expanded(true))
	_ticker_row.add_child(_expand_button)

	_content = VBoxContainer.new()
	_content.name = "ExpandedContent"
	_content.add_theme_constant_override("separation", 0)
	_content.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_surface_root.add_child(_content)

	var header := HBoxContainer.new()
	header.name = "Header"
	header.custom_minimum_size = Vector2(0, 74)
	header.add_theme_constant_override("separation", 12)
	header.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_content.add_child(header)

	_header_icon = TextureRect.new()
	_header_icon.custom_minimum_size = Vector2(56, 56)
	_header_icon.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	_header_icon.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
	_header_icon.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR_WITH_MIPMAPS
	_header_icon.texture = ICON_BROADCAST
	_header_icon.mouse_filter = Control.MOUSE_FILTER_IGNORE
	header.add_child(_header_icon)

	_header_title = Label.new()
	_header_title.text = "世界公告"
	_header_title.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	_header_title.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
	_header_title.add_theme_font_size_override("font_size", 26)
	_header_title.add_theme_color_override("font_color", TEXT_COLOR)
	_header_title.mouse_filter = Control.MOUSE_FILTER_IGNORE
	header.add_child(_header_title)

	_header_banner = TextureRect.new()
	_header_banner.name = "TownBanner"
	_header_banner.custom_minimum_size = Vector2(88, 58)
	_header_banner.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	_header_banner.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
	_header_banner.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR_WITH_MIPMAPS
	_header_banner.texture = ICON_BANNER
	_header_banner.mouse_filter = Control.MOUSE_FILTER_IGNORE
	header.add_child(_header_banner)

	var close_button := Button.new()
	close_button.text = "×"
	close_button.tooltip_text = "收起世界公告"
	close_button.custom_minimum_size = Vector2(54, 54)
	close_button.focus_mode = Control.FOCUS_NONE
	close_button.add_theme_font_size_override("font_size", 34)
	close_button.add_theme_color_override("font_color", MUTED_COLOR)
	close_button.add_theme_color_override("font_hover_color", ACCENT_COLOR)
	close_button.add_theme_stylebox_override("normal", _empty_style())
	close_button.add_theme_stylebox_override("hover", _hover_style())
	close_button.add_theme_stylebox_override("pressed", _pressed_style())
	close_button.pressed.connect(func() -> void: _set_expanded(false))
	header.add_child(close_button)

	var header_rule := ColorRect.new()
	header_rule.custom_minimum_size = Vector2(0, 1)
	header_rule.color = LINE_COLOR
	header_rule.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_content.add_child(header_rule)

	_scroll = ScrollContainer.new()
	_scroll.name = "AnnouncementScroll"
	_scroll.custom_minimum_size = Vector2(0, 320)
	_scroll.size_flags_vertical = Control.SIZE_EXPAND_FILL
	_scroll.horizontal_scroll_mode = ScrollContainer.SCROLL_MODE_DISABLED
	_scroll.mouse_filter = Control.MOUSE_FILTER_STOP
	_content.add_child(_scroll)

	_entries = VBoxContainer.new()
	_entries.name = "AnnouncementEntries"
	_entries.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	_entries.add_theme_constant_override("separation", 0)
	_scroll.add_child(_entries)

	var composer_row := HBoxContainer.new()
	composer_row.name = "Composer"
	composer_row.custom_minimum_size = Vector2(0, 72)
	composer_row.add_theme_constant_override("separation", 10)
	_content.add_child(composer_row)

	_composer = LineEdit.new()
	_composer.name = "AnnouncementInput"
	_composer.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	_composer.placeholder_text = "发布世界公告（100鲸币）..."
	_composer.max_length = 160
	_composer.add_theme_font_size_override("font_size", 20)
	_composer.add_theme_color_override("font_color", TEXT_COLOR)
	_composer.add_theme_color_override("font_placeholder_color", MUTED_COLOR)
	_composer.add_theme_stylebox_override("normal", _input_style())
	_composer.add_theme_stylebox_override("focus", _input_focus_style())
	_composer.text_submitted.connect(func(_value: String) -> void: _publish())
	composer_row.add_child(_composer)

	_send_button = Button.new()
	_send_button.name = "PublishButton"
	_send_button.text = ""
	_send_button.icon = ICON_SEND_BUTTON
	_send_button.expand_icon = true
	_send_button.icon_max_width = 56
	_send_button.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR_WITH_MIPMAPS
	_send_button.tooltip_text = "发布世界公告"
	_send_button.custom_minimum_size = Vector2(56, 56)
	_send_button.size_flags_vertical = Control.SIZE_SHRINK_CENTER
	_send_button.focus_mode = Control.FOCUS_NONE
	_send_button.add_theme_color_override("icon_normal_color", Color.WHITE)
	_send_button.add_theme_color_override("icon_hover_color", Color("eef9ff"))
	_send_button.add_theme_color_override("icon_pressed_color", Color("bedcf5"))
	_send_button.add_theme_stylebox_override("normal", _empty_style())
	_send_button.add_theme_stylebox_override("hover", _empty_style())
	_send_button.add_theme_stylebox_override("pressed", _empty_style())
	_send_button.add_theme_stylebox_override("focus", _empty_style())
	_send_button.pressed.connect(_publish)
	composer_row.add_child(_send_button)

func _subscribe_to_events() -> void:
	var event_system := get_node_or_null("/root/EventSystem")
	if event_system == null:
		return
	event_system.call("connect_event", EventNames.CHAT_MESSAGE_RECEIVED, _on_chat_message_received, self)
	event_system.call("connect_event", EventNames.CHAT_MESSAGE_SENT, _on_chat_message_sent, self)
	event_system.call("connect_event", EventNames.CHAT_ERROR_OCCURRED, _on_chat_error, self)

func _on_chat_message_sent(data: Dictionary) -> void:
	if not _publish_pending or not bool(data.get("world_bulletin", false)):
		return
	_composer.clear()
	_set_publish_pending(false)

func _on_chat_error(data: Dictionary) -> void:
	if not _publish_pending or not bool(data.get("world_bulletin", false)):
		return
	_set_publish_pending(false)
	_composer.grab_focus()

func _set_publish_pending(pending: bool) -> void:
	_publish_pending = pending
	_composer.editable = not pending
	_send_button.disabled = pending

func _seed_preview_items() -> void:
	_announcements = [
		{"sender": "小海豚", "time": "12:08", "content": "今晚海湾烟花节 20:00 开始", "category": "活动", "pinned": true},
		{"sender": "珊珊酱", "time": "12:12", "content": "需要 2 名采集伙伴一起出海", "category": "招募"},
		{"sender": "海盐", "time": "12:20", "content": "新地图补给点已刷新", "category": "通知"},
		{"sender": "系统", "time": "12:30", "content": "世界频道维护将在 15 分钟后结束", "category": "通知"}
	]
	_last_preview = str(_announcements[0].get("content", _last_preview))
	_render_entries()

func _on_chat_message_received(data: Dictionary) -> void:
	# 只展示后端确认并已扣费的世界公告，普通全局聊天不进公告栏。
	if not bool(data.get("world_bulletin", data.get("worldBulletin", false))):
		return
	var scope := str(data.get("scope", data.get("channel", "global"))).to_lower()
	var tab := str(data.get("tab", "world")).to_lower()
	if scope in ["private", "whisper"] or tab in ["private", "whisper", "friends"]:
		return
	var content := str(data.get("content", data.get("message", ""))).strip_edges()
	if content.is_empty():
		return
	var sender := str(data.get("from_user", data.get("username", "玩家"))).strip_edges()
	if sender.is_empty():
		sender = "玩家"
	var category := "通知"
	if sender == "系统" or str(data.get("sender_type", "")).to_lower() == "system":
		category = "通知"
	_announcements.push_front({
		"sender": sender,
		"time": Time.get_time_string_from_system().left(5),
		"content": content,
		"category": category
	})
	while _announcements.size() > MAX_ITEMS:
		_announcements.pop_back()
	_last_preview = content
	if not _expanded:
		_unread += 1
	_render_entries()
	_update_ticker()

func _set_expanded(expanded: bool, immediate := false) -> void:
	_expanded = expanded
	if _expanded:
		_unread = 0
		_panel.custom_minimum_size = Vector2(PANEL_WIDTH, EXPANDED_HEIGHT)
		_panel.offset_top = -EDGE_MARGIN - EXPANDED_HEIGHT
		_ticker_row.hide()
		_content.show()
		_render_entries()
	else:
		_panel.custom_minimum_size = Vector2(PANEL_WIDTH, COLLAPSED_HEIGHT)
		_panel.offset_top = -EDGE_MARGIN - COLLAPSED_HEIGHT
		_content.hide()
		_ticker_row.show()
		_update_ticker()
	if immediate:
		_panel.modulate.a = 1.0

func _update_ticker() -> void:
	if not is_instance_valid(_ticker):
		return
	var unread_text := "  · %d" % _unread if _unread > 0 else ""
	_ticker.text = "  世界公告   %s%s" % [_last_preview.left(25), unread_text]

func _render_entries() -> void:
	if not is_instance_valid(_entries):
		return
	for child in _entries.get_children():
		child.queue_free()
	if _announcements.is_empty():
		var empty := VBoxContainer.new()
		empty.custom_minimum_size = Vector2(0, 210)
		empty.alignment = BoxContainer.ALIGNMENT_CENTER
		_entries.add_child(empty)
		var whale := TextureRect.new()
		whale.texture = ICON_EMPTY
		whale.custom_minimum_size = Vector2(0, 92)
		whale.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
		whale.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
		whale.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR_WITH_MIPMAPS
		whale.mouse_filter = Control.MOUSE_FILTER_IGNORE
		empty.add_child(whale)
		var empty_label := Label.new()
		empty_label.text = "暂无公告"
		empty_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
		empty_label.add_theme_color_override("font_color", MUTED_COLOR)
		empty.add_child(empty_label)
		return
	for item in _announcements:
		_entries.add_child(_build_entry(item))

func _build_entry(item: Dictionary) -> Control:
	var card := PanelContainer.new()
	card.custom_minimum_size = Vector2(0, 92)
	card.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	card.mouse_filter = Control.MOUSE_FILTER_IGNORE
	var card_style := StyleBoxFlat.new()
	card_style.bg_color = Color(1, 1, 1, 0.55)
	card_style.border_color = LINE_COLOR
	card_style.set_border_width_all(1)
	card_style.set_corner_radius_all(10)
	card.add_theme_stylebox_override("panel", card_style)

	var margin := MarginContainer.new()
	margin.add_theme_constant_override("margin_left", 10)
	margin.add_theme_constant_override("margin_top", 7)
	margin.add_theme_constant_override("margin_right", 10)
	margin.add_theme_constant_override("margin_bottom", 7)
	card.add_child(margin)

	var card_row := HBoxContainer.new()
	card_row.add_theme_constant_override("separation", 8)
	card_row.mouse_filter = Control.MOUSE_FILTER_IGNORE
	margin.add_child(card_row)

	var row := VBoxContainer.new()
	row.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	row.add_theme_constant_override("separation", 2)
	row.mouse_filter = Control.MOUSE_FILTER_IGNORE
	card_row.add_child(row)

	var meta := HBoxContainer.new()
	meta.custom_minimum_size = Vector2(0, 30)
	meta.add_theme_constant_override("separation", 6)
	meta.mouse_filter = Control.MOUSE_FILTER_IGNORE
	row.add_child(meta)

	if bool(item.get("pinned", false)):
		var pin := TextureRect.new()
		pin.custom_minimum_size = Vector2(28, 28)
		pin.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
		pin.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
		pin.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR_WITH_MIPMAPS
		pin.texture = ICON_PIN
		pin.tooltip_text = "置顶公告"
		pin.mouse_filter = Control.MOUSE_FILTER_IGNORE
		meta.add_child(pin)

	var sender := Label.new()
	sender.text = str(item.get("sender", "玩家"))
	sender.add_theme_font_size_override("font_size", 20)
	sender.add_theme_color_override("font_color", TEXT_COLOR)
	meta.add_child(sender)

	var category := Label.new()
	category.text = str(item.get("category", "通知"))
	category.add_theme_font_size_override("font_size", 16)
	category.add_theme_color_override("font_color", Color.WHITE)
	category.add_theme_stylebox_override("normal", _category_style(category.text))
	meta.add_child(category)

	if str(item.get("category", "")) == "招募":
		var recruit := TextureRect.new()
		recruit.custom_minimum_size = Vector2(32, 28)
		recruit.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
		recruit.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
		recruit.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR_WITH_MIPMAPS
		recruit.texture = ICON_RECRUIT
		recruit.mouse_filter = Control.MOUSE_FILTER_IGNORE
		meta.add_child(recruit)

	var time := Label.new()
	time.text = str(item.get("time", ""))
	time.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	time.horizontal_alignment = HORIZONTAL_ALIGNMENT_RIGHT
	time.add_theme_font_size_override("font_size", 16)
	time.add_theme_color_override("font_color", MUTED_COLOR)
	meta.add_child(time)

	var body := Label.new()
	body.text = str(item.get("content", ""))
	body.text_overrun_behavior = TextServer.OVERRUN_TRIM_ELLIPSIS
	body.custom_minimum_size = Vector2(0, 30)
	body.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	body.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
	body.add_theme_font_size_override("font_size", 20)
	body.add_theme_color_override("font_color", TEXT_COLOR)
	body.mouse_filter = Control.MOUSE_FILTER_IGNORE
	row.add_child(body)

	return card

func _category_style(category: String) -> StyleBoxFlat:
	var style := StyleBoxFlat.new()
	style.set_corner_radius_all(6)
	style.content_margin_left = 7
	style.content_margin_right = 7
	style.content_margin_top = 3
	style.content_margin_bottom = 3
	match category:
		"活动": style.bg_color = Color("55bd8a")
		"招募": style.bg_color = Color("f0aa4c")
		_: style.bg_color = ACCENT_COLOR
	return style

func _publish() -> void:
	if _publish_pending:
		return
	var content := _composer.text.strip_edges()
	if content.is_empty():
		return
	var manager := get_node_or_null("/root/ChatManager")
	if manager == null or not manager.has_method("send_world_bulletin"):
		return
	if not bool(manager.call("send_world_bulletin", content)):
		return
	_set_publish_pending(true)
	_set_expanded(true)

func _surface_style() -> StyleBoxFlat:
	var style := StyleBoxFlat.new()
	style.bg_color = SURFACE_COLOR
	style.border_color = Color("b8d9f4")
	style.set_border_width_all(2)
	style.set_corner_radius_all(18)
	style.shadow_color = Color(0.16, 0.40, 0.65, 0.18)
	style.shadow_size = 10
	style.shadow_offset = Vector2(0, 4)
	style.content_margin_left = 14
	style.content_margin_top = 12
	style.content_margin_right = 14
	style.content_margin_bottom = 12
	return style

func _empty_style() -> StyleBoxEmpty:
	return StyleBoxEmpty.new()

func _hover_style() -> StyleBoxFlat:
	var style := StyleBoxFlat.new()
	style.bg_color = Color(0.88, 0.95, 1.0, 0.85)
	style.set_corner_radius_all(12)
	return style

func _pressed_style() -> StyleBoxFlat:
	var style := StyleBoxFlat.new()
	style.bg_color = Color(0.78, 0.91, 1.0, 0.9)
	style.set_corner_radius_all(12)
	return style

func _input_style() -> StyleBoxFlat:
	var style := StyleBoxFlat.new()
	style.bg_color = Color(1, 1, 1, 0.9)
	style.border_color = Color("c4def4")
	style.set_border_width_all(1)
	style.set_corner_radius_all(12)
	style.content_margin_left = 10
	style.content_margin_right = 10
	return style

func _input_focus_style() -> StyleBoxFlat:
	var style := _input_style()
	style.border_color = ACCENT_COLOR
	style.set_border_width_all(2)
	return style

func _accent_style() -> StyleBoxFlat:
	var style := StyleBoxFlat.new()
	style.bg_color = ACCENT_COLOR
	style.set_corner_radius_all(14)
	return style

func _accent_hover_style() -> StyleBoxFlat:
	var style := _accent_style()
	style.bg_color = Color("53a8f4")
	return style

func _accent_pressed_style() -> StyleBoxFlat:
	var style := _accent_style()
	style.bg_color = Color("247bc7")
	return style