class_name SearchPopup
extends BasePopup
## Searches every soundtrack on the server as you type, with [SoundtrackSearch].

var soundtracks: Array = []
var label_pool: Array[Label] = []

var _matcher: SoundtrackSearch = SoundtrackSearch.new()

@onready var search_list: VBoxContainer = %SearchResults
@onready var search_panel: Panel = %SearchPanel
@onready var clear_button: Button = $ClearButton
@onready var search_bar: TextEdit = $Searchbar


func _ready() -> void:
	clear_button.pressed.connect(clear)
	search_bar.grab_focus()
	search_bar.text_changed.connect(search)
	visibility_changed.connect(focus)


func focus() -> void:
	if visible:
		search_bar.grab_focus()
		clear()


func close() -> void:
	clear()
	super()


func search() -> void:
	GameLog.debug(search_bar.text)
	var search_text: String = search_bar.text

	if search_text == "":
		show_all_soundtracks()
		return

	perform_search(search_text)


func show_all_soundtracks() -> void:
	# Hide all visible labels and add to pool
	for child: Label in search_list.get_children():
		if child.visible:
			child.visible = false
			label_pool.append(child)

	# Show all soundtracks in order
	for soundtrack: String in soundtracks:
		add_soundtrack_reuse(soundtrack)


func perform_search(search_text: String) -> void:
	# Hide all visible labels and add to pool
	for child: Label in search_list.get_children():
		if child.visible:
			child.visible = false
			label_pool.append(child)

	for soundtrack: String in _matcher.find_matches(search_text):
		add_soundtrack_reuse(soundtrack)


func add_soundtrack(soundtrack: String) -> void:
	# Backward compatibility - delegates to reuse version
	add_soundtrack_reuse(soundtrack)


## Shows [param soundtrack], reusing a hidden label from the pool when there is one.
func add_soundtrack_reuse(soundtrack: String) -> void:
	var label: Label
	if label_pool.size() > 0:
		label = label_pool.pop_front()
		label.text = soundtrack
		label.visible = true
		# Move to end to maintain display order
		search_list.move_child(label, search_list.get_child_count() - 1)
	else:
		label = Label.new()
		label.text = soundtrack
		label.autowrap_mode = TextServer.AUTOWRAP_WORD
		search_list.add_child(label)
		label.visible = true


func check_if_soundtrack_exists(soundtrack: String) -> bool:
	var soundtrack_exists: bool = false
	for child: Label in search_list.get_children():
		if child.text == soundtrack and child.visible:
			soundtrack_exists = true
	return soundtrack_exists


func get_list_of_soundtracks() -> void:
	GameLog.debug("get_list_of_soundtracks")
	var handle_soundtracks: Callable = func handle_soundtracks(array: Variant) -> void:
		if typeof(array) == TYPE_ARRAY:
			# Reuse existing labels: hide all and add to pool
			for child: Label in search_list.get_children():
				child.visible = false
				label_pool.append(child)
			set_soundtracks(array)
			for soundtrack: String in soundtracks:
				add_soundtrack_reuse(soundtrack)
		else:
			GameLog.warning("Unexpected data")
	MusicServerClient.fetch_all_soundtracks_ordered(handle_soundtracks)


## Replaces the searchable soundtracks.
func set_soundtracks(list: Array) -> void:
	soundtracks = []
	soundtracks.append_array(list)
	_matcher.set_names(soundtracks)


func clear() -> void:
	search_bar.text = ""
	show_all_soundtracks()
	search_bar.grab_focus()