extends Control
## #257: Loading screen overlay — blocks input during save/load round-trip.
## Shown when LOAD_GAME fires; hidden when save_result arrives (success or failure).
## Full-screen, dark overlay with centered status text.
## #724: Shows client version (from project.yaml) and protocol version below the status text.

const BG_COLOR := Color(0.0, 0.0, 0.0, 0.75)
const TEXT_COLOR := Color("#c8d0e0")
const VERSION_COLOR := Color("#667788")
const FONT_SIZE := 18
const VERSION_FONT_SIZE := 11

var _label: Label = null
var _version_label: Label = null


func _ready() -> void:
	visible = false
	mouse_filter = Control.MOUSE_FILTER_STOP
	set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	_build_ui()


func _build_ui() -> void:
	var bg := ColorRect.new()
	bg.color = BG_COLOR
	bg.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	bg.mouse_filter = Control.MOUSE_FILTER_IGNORE
	add_child(bg)

	_label = Label.new()
	_label.text = UIStrings.get_text("notifications.loading")
	_label.add_theme_font_size_override("font_size", FONT_SIZE)
	_label.add_theme_color_override("font_color", TEXT_COLOR)
	_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	_label.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
	_label.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	_label.mouse_filter = Control.MOUSE_FILTER_IGNORE
	add_child(_label)

	var client_ver := _read_client_version()
	var proto_ver: int = Protocol.PROTOCOL_VERSION
	_version_label = Label.new()
	_version_label.text = "v%s  ·  protocol %d" % [client_ver, proto_ver]
	_version_label.add_theme_font_size_override("font_size", VERSION_FONT_SIZE)
	_version_label.add_theme_color_override("font_color", VERSION_COLOR)
	_version_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	_version_label.anchor_left = 0.0
	_version_label.anchor_right = 1.0
	_version_label.anchor_top = 1.0
	_version_label.anchor_bottom = 1.0
	_version_label.offset_top = -32.0
	_version_label.offset_bottom = -8.0
	_version_label.mouse_filter = Control.MOUSE_FILTER_IGNORE
	add_child(_version_label)


func _read_client_version() -> String:
	var yaml_path := ProjectSettings.globalize_path("res://") + "/../project.yaml"
	if not FileAccess.file_exists(yaml_path):
		return "?.?.?"
	var file := FileAccess.open(yaml_path, FileAccess.READ)
	if file == null:
		return "?.?.?"
	var content := file.get_as_text()
	file.close()
	for line: String in content.split("\n"):
		if line.begins_with("version:"):
			var parts := line.split(":", false, 1)
			if parts.size() >= 2:
				return parts[1].strip_edges()
	return "?.?.?"


func show_loading() -> void:
	visible = true


## Hide the loading overlay. success=false is reserved for future failure-state UI.
func hide_loading(_success: bool = true) -> void:
	visible = false