# target_ui.gd —— 40250 目标信息板（TargetBoard）1:1 实现
# 严格对照：
#   root/uitarget.py:14-340 (TargetBoard)
#   UserInterface/InstanceBase.cpp (CanViewTargetHP)
#   root/localeinfo.py (TARGET_LEVEL_PAWN..KING)
extends Node

const UiAssets = preload("res://ui/ui_assets.gd")

const GRADE_NAMES := {
	0: "1阶",       # nonplayer.PAWN: TARGET_LEVEL_PAWN
	1: "2阶",       # nonplayer.S_PAWN: TARGET_LEVEL_S_PAWN
	2: "3阶",       # nonplayer.KNIGHT: TARGET_LEVEL_KNIGHT
	3: "4阶",       # nonplayer.S_KNIGHT: TARGET_LEVEL_S_KNIGHT
	4: "5阶首领",   # nonplayer.BOSS: TARGET_LEVEL_BOSS
	5: "6阶王",     # nonplayer.KING: TARGET_LEVEL_KING
}

const DEFAULT_BOARD_WIDTH := 250.0
const BOARD_HEIGHT := 40.0
const GAUGE_WIDTH := 130.0

signal whisper_requested(name: String)
signal exchange_requested(vid: int)
signal fight_requested(vid: int)
signal view_equipment_requested(vid: int)

var client: Node
var _root: Control
var _board: Panel
var _name_label: Label
var _hp_gauge_bg: ColorRect
var _hp_gauge_fill: ColorRect
var _hp_text: Label
var _close_button: Button
var _button_container: HBoxContainer
var _action_buttons: Dictionary = {}

var _current_vid := 0
var _current_name := ""
var _current_hp_pct := 100
var _is_pc := false
var _shown := false
var _assets_root := ""

func setup(m2client: Node, parent: Node, assets := "") -> void:
	client = m2client
	_assets_root = assets
	_build(parent)

func is_open() -> bool:
	return _shown and _root != null and _root.visible

func get_target_vid() -> int:
	return _current_vid

func get_target_name() -> String:
	return _current_name

func get_hp_percentage() -> int:
	return _current_hp_pct

func open(vid: int, target_name: String, level := -1, grade := -1, is_pc := false) -> void:
	_current_vid = vid
	_is_pc = is_pc

	var display_name := target_name
	var prefix := ""
	if level > 0:
		prefix += "[Lv. %d] " % level
	if grade in GRADE_NAMES:
		prefix += "(%s) " % GRADE_NAMES[grade]

	_current_name = prefix + display_name
	_name_label.text = _current_name

	# 40250 uitarget.py:301 板面自适应宽度：200 + 7 * nameLength
	var calculated_width := maxf(DEFAULT_BOARD_WIDTH, 200.0 + 7.0 * float(_current_name.length()))
	_update_layout(calculated_width, is_pc)

	_shown = true
	_root.visible = true
	_update_screen_position()

func set_hp(hp_pct: int) -> void:
	_current_hp_pct = clampi(hp_pct, 0, 100)
	if _hp_gauge_fill:
		_hp_gauge_fill.size.x = GAUGE_WIDTH * (_current_hp_pct / 100.0)
	if _hp_text:
		_hp_text.text = "%d%%" % _current_hp_pct
	if _hp_gauge_bg and not _is_pc:
		_hp_gauge_bg.visible = true

func close() -> void:
	_shown = false
	_current_vid = 0
	_current_name = ""
	if _root:
		_root.visible = false

func _on_close_button_pressed() -> void:
	if client and client.has_method("clear_target"):
		client.clear_target()
	close()

func _update_layout(width: float, is_pc: bool) -> void:
	_board.size = Vector2(width, BOARD_HEIGHT)
	if is_pc:
		_hp_gauge_bg.visible = false
		_button_container.visible = true
		_button_container.position = Vector2(width - 200, 8)
	else:
		_hp_gauge_bg.visible = true
		_button_container.visible = false
		_hp_gauge_bg.position = Vector2(width - 175, 14)
		_close_button.position = Vector2(width - 28, 10)

func _update_screen_position() -> void:
	if _root == null or not is_open():
		return
	var screen_w := 800.0
	var vp := _root.get_viewport()
	if vp:
		screen_w = vp.get_visible_rect().size.x
	# 40250 uitarget.py:254 UpdatePosition: ScreenWidth // 2 - Width // 2, 10
	_root.position = Vector2(screen_w / 2.0 - _board.size.x / 2.0, 10.0)

func _build(parent: Node) -> void:
	_root = Control.new()
	_root.name = "TargetBoard"
	_root.set_anchors_preset(Control.PRESET_TOP_LEFT)
	_root.size = Vector2(DEFAULT_BOARD_WIDTH, BOARD_HEIGHT)
	_root.visible = false
	parent.add_child(_root)

	# 经典 ThinBoard 风格
	_board = Panel.new()
	_board.name = "Board"
	_board.size = Vector2(DEFAULT_BOARD_WIDTH, BOARD_HEIGHT)
	var bg := StyleBoxFlat.new()
	bg.bg_color = Color(0.04, 0.05, 0.07, 0.88)
	bg.border_color = Color(0.45, 0.38, 0.22, 0.95)
	bg.set_border_width_all(1)
	bg.set_corner_radius_all(2)
	_board.add_theme_stylebox_override("panel", bg)
	_root.add_child(_board)

	# 目标名称标签
	_name_label = Label.new()
	_name_label.name = "Name"
	_name_label.position = Vector2(23, 11)
	_name_label.size = Vector2(200, 20)
	_name_label.add_theme_font_size_override("font_size", 11)
	_name_label.add_theme_color_override("font_color", Color(1.0, 0.92, 0.75))
	_name_label.add_theme_color_override("font_outline_color", Color(0, 0, 0, 0.9))
	_name_label.add_theme_constant_override("outline_size", 2)
	_board.add_child(_name_label)

	# 红色 HP Gauge（40250 130px 经典红槽）
	_hp_gauge_bg = ColorRect.new()
	_hp_gauge_bg.name = "HPGaugeBG"
	_hp_gauge_bg.position = Vector2(DEFAULT_BOARD_WIDTH - 175, 14)
	_hp_gauge_bg.size = Vector2(GAUGE_WIDTH, 12)
	_hp_gauge_bg.color = Color(0.12, 0.02, 0.02, 0.95)
	_board.add_child(_hp_gauge_bg)

	_hp_gauge_fill = ColorRect.new()
	_hp_gauge_fill.name = "HPGaugeFill"
	_hp_gauge_fill.position = Vector2.ZERO
	_hp_gauge_fill.size = Vector2(GAUGE_WIDTH, 12)
	_hp_gauge_fill.color = Color(0.85, 0.12, 0.12, 1.0)
	_hp_gauge_bg.add_child(_hp_gauge_fill)

	_hp_text = Label.new()
	_hp_text.name = "HPText"
	_hp_text.set_anchors_preset(Control.PRESET_FULL_RECT)
	_hp_text.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	_hp_text.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
	_hp_text.add_theme_font_size_override("font_size", 9)
	_hp_text.add_theme_color_override("font_color", Color(1, 1, 1, 0.95))
	_hp_text.add_theme_color_override("font_outline_color", Color(0, 0, 0, 0.8))
	_hp_text.add_theme_constant_override("outline_size", 1)
	_hp_text.text = "100%"
	_hp_gauge_bg.add_child(_hp_text)

	# 关闭按钮 (X)
	_close_button = Button.new()
	_close_button.name = "CloseButton"
	_close_button.position = Vector2(DEFAULT_BOARD_WIDTH - 28, 10)
	_close_button.size = Vector2(18, 18)
	_close_button.text = "×"
	_close_button.add_theme_font_size_override("font_size", 12)
	_close_button.mouse_default_cursor_shape = Control.CURSOR_POINTING_HAND
	_close_button.pressed.connect(_on_close_button_pressed)
	_board.add_child(_close_button)

	# PC 交互按钮条
	_button_container = HBoxContainer.new()
	_button_container.name = "ButtonContainer"
	_button_container.position = Vector2(DEFAULT_BOARD_WIDTH - 200, 8)
	_button_container.visible = false
	_board.add_child(_button_container)

	_add_action_btn("私聊", func(): whisper_requested.emit(_current_name))
	_add_action_btn("交易", func(): exchange_requested.emit(_current_vid))
	_add_action_btn("装备", func(): view_equipment_requested.emit(_current_vid))

func _add_action_btn(text: String, callback: Callable) -> void:
	var btn := Button.new()
	btn.text = text
	btn.custom_minimum_size = Vector2(42, 22)
	btn.add_theme_font_size_override("font_size", 10)
	btn.mouse_default_cursor_shape = Control.CURSOR_POINTING_HAND
	btn.pressed.connect(callback)
	_button_container.add_child(btn)