class_name Chat
extends Menu

const BBCODE_TAGS_TO_ESCAPE: PackedStringArray = [
	"url", "img", "font", "dropcap", "opentype_features", "outline_size"
]

var _chat_message_scene := preload("res://scenes/ui/chat_message.tscn")

var _message_history: PackedStringArray = []
var _history_position: int = 0

@onready var _msg_scroll: ScrollContainer = $MsgMargin/MsgVBox/MsgScroll
@onready
var _msg_container: Container = $MsgMargin/MsgVBox/MsgScroll/MsgMargin/MsgContainer
@onready var _msg_margin: Container = $MsgMargin/MsgVBox/MsgScroll/MsgMargin
@onready var _message_edit: LineEdit = $EditMargin/EditVBox/MessageEdit


func _ready() -> void:
	_message_edit.text_submitted.connect(_on_message_edit_text_submitted)
	_message_edit.visible = false
	_msg_margin.minimum_size_changed.connect(_on_message_margin_minimum_size_changed)
	Referencer.chat = self


func _exit_tree() -> void:
	Referencer.chat = null


func _input(event: InputEvent) -> void:
	if event.is_action_pressed("menu"):
		call_deferred("close")

	if _message_edit.has_focus():
		if (
			event.is_action_pressed("ui_up")
			and _history_position + 1 <= _message_history.size()
		):
			_history_position += 1
			_set_message_from_history()

		if event.is_action_pressed("ui_down") and _history_position - 1 >= 0:
			_history_position -= 1
			_set_message_from_history()


func _unhandled_input(event: InputEvent) -> void:
	if event.is_action_pressed("chat") and not is_open:
		open()


func open() -> void:
	super.open()
	_message_edit.visible = true
	_message_edit.grab_focus()
	_msg_scroll.vertical_scroll_mode = ScrollContainer.SCROLL_MODE_AUTO


func close() -> void:
	super.close()
	_message_edit.release_focus()
	_message_edit.visible = false
	_msg_scroll.vertical_scroll_mode = ScrollContainer.SCROLL_MODE_SHOW_NEVER


@rpc("any_peer", "call_local", "reliable", 1)
func _send_message(message: String) -> void:
	var player_name := (
		Networker.players[multiplayer.get_remote_sender_id()]["name"] as String
	)
	var message_node := _make_message_node(player_name, message)
	_msg_container.add_child(message_node)
	print(player_name + ": " + message)


func _make_message_node(player_name: String, message: String) -> RichTextLabel:
	var node := _chat_message_scene.instantiate() as RichTextLabel
	node.text = "[b]" + player_name + ":[/b]  " + _escape_bbcode_tags(message)

	return node


func _set_message_from_history() -> void:
	if _history_position > 0:
		var message := _message_history[-_history_position]
		_message_edit.text = message
	else:
		_message_edit.text = ""


func _escape_bbcode_tags(message: String) -> String:
	for tag_name in BBCODE_TAGS_TO_ESCAPE:
		var tag := "[" + tag_name
		if tag in message:
			message = message.replace(tag, "[lb]" + tag_name)
	return message


func _on_message_edit_text_submitted(message: String) -> void:
	if _message_edit.text == "":
		return
	_message_edit.text = ""
	if not (message in _message_history):
		_message_history.append(message)
	_history_position = 0
	close()
	_send_message.rpc(message)


func _on_message_margin_minimum_size_changed() -> void:
	_msg_scroll.set_deferred(
		"scroll_vertical", int(_msg_scroll.get_v_scroll_bar().max_value) + 100
	)