extends Node

# UIStrings — loads UI display text from data/ui-strings.yaml.
# Access: UIStrings.get_text("hud.mode_label") -> "Mode"
# Falls back to the key itself if not found, with a push_warning.

const STRINGS_PATH: String = "res://data/ui-strings.yaml"

var _strings: Dictionary = {}
var _loaded: bool = false

func _ready() -> void:
	_load_strings()

func _load_strings() -> void:
	if not FileAccess.file_exists(STRINGS_PATH):
		push_warning("UIStrings: file not found: %s" % STRINGS_PATH)
		return
	var file := FileAccess.open(STRINGS_PATH, FileAccess.READ)
	if file == null:
		push_warning("UIStrings: failed to open: %s" % STRINGS_PATH)
		return
	var text := file.get_as_text()
	file.close()
	_strings = _parse_yaml(text)
	_loaded = true
	print("UIStrings: loaded %d strings from %s" % [_strings.size(), STRINGS_PATH])

## Get a UI string by dotted key. Returns the key itself if not found.
func get_text(key: String) -> String:
	if _strings.has(key):
		return _strings[key]
	push_warning("UIStrings: missing key '%s'" % key)
	return key

## Check if a key exists.
func has_key(key: String) -> bool:
	return _strings.has(key)

## Get all keys.
func get_all_keys() -> PackedStringArray:
	return PackedStringArray(_strings.keys())

## Reload from disk (useful for hot-reload during development).
func reload() -> void:
	_strings.clear()
	_loaded = false
	_load_strings()

## Parse subset of YAML: one-level-nested key-value pairs.
## Returns flat Dictionary with dotted keys: { "section.key": "value" }.
static func _parse_yaml(text: String) -> Dictionary:
	var strings := {}
	var current_section := ""
	for line in text.split("\n"):
		var stripped := line.strip_edges(false, true)
		if stripped.is_empty() or stripped.begins_with("#"):
			continue
		var indent := line.length() - line.lstrip(" ").length()
		var content := stripped.strip_edges()
		var colon_pos := content.find(":")
		if colon_pos < 0:
			continue
		var key := content.substr(0, colon_pos).strip_edges()
		var val := content.substr(colon_pos + 1).strip_edges()
		if val.length() >= 2 and val.begins_with("\"") and val.ends_with("\""):
			val = val.substr(1, val.length() - 2)
		if indent == 0:
			current_section = key
		elif indent >= 2 and not current_section.is_empty():
			strings[current_section + "." + key] = val
	return strings