# LoadingScreen (P10) —— 相位驱动的读取遮罩。
#
#   var ls := preload("res://ui/loading_screen.gd").new()
#   add_child(ls)
#   ls.setup(m2client)          # 接 phase_changed；也可手动 show_for("...") / hide()
#
# 只有 PHASE = "loading"（载入地图）才铺全屏遮罩；login / select / game 都隐藏
# —— select 阶段要露出选人界面，login 阶段登录框自己显示进度。
extends CanvasLayer

const HINTS := {
	"loading": "载入地图…",
}

var client: Node
var _panel: ColorRect
var _label: Label
var _spinner: Label
var _bar: ProgressBar
var _spin := 0.0

func setup(m2client: Node = null) -> void:
	client = m2client
	layer = 60
	_build()
	if client and client.has_signal("phase_changed"):
		client.phase_changed.connect(_on_phase)
	if client and client.has_signal("disconnected"):
		client.disconnected.connect(func(_r): hide_screen())

func _on_phase(phase: String) -> void:
	if phase.to_lower() == "loading":
		show_for(String(HINTS.get("loading", "载入中…")))
	else:
		hide_screen()   # login / select / game —— 让位给对应界面

func show_for(text: String) -> void:
	_label.text = text
	_bar.visible = false
	_panel.visible = true

func set_progress(frac: float) -> void:
	_bar.visible = true
	_bar.value = clampf(frac, 0.0, 1.0) * 100.0

func hide_screen() -> void:
	_panel.visible = false

func is_showing() -> bool:
	return _panel.visible

func _process(dt: float) -> void:
	if _panel.visible:
		_spin += dt * 4.0
		_spinner.text = ["◐", "◓", "◑", "◒"][int(_spin) % 4]

func _build() -> void:
	_panel = ColorRect.new()
	_panel.color = Color(0.02, 0.03, 0.05, 0.96)
	_panel.set_anchors_preset(Control.PRESET_FULL_RECT)
	_panel.visible = false
	add_child(_panel)
	var box := VBoxContainer.new()
	box.set_anchors_preset(Control.PRESET_CENTER)
	box.position = Vector2(-120, -50)
	box.custom_minimum_size = Vector2(240, 0)
	box.alignment = BoxContainer.ALIGNMENT_CENTER
	box.add_theme_constant_override("separation", 14)
	_panel.add_child(box)
	_spinner = Label.new()
	_spinner.text = "◐"
	_spinner.add_theme_font_size_override("font_size", 36)
	_spinner.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	box.add_child(_spinner)
	_label = Label.new()
	_label.text = "载入中…"
	_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	box.add_child(_label)
	_bar = ProgressBar.new()
	_bar.custom_minimum_size = Vector2(240, 12)
	_bar.show_percentage = false
	_bar.visible = false
	box.add_child(_bar)