extends Panel

const SERVER_HISTORY_PATH := "user://server_history"

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

@onready var _name_edit: LineEdit = $MarginContainer/GridContainer/NameEdit
@onready var _address_edit: LineEdit = $MarginContainer/GridContainer/AddressEdit
@onready var _host_button: Button = $MarginContainer/GridContainer/HostButton
@onready var _join_button: Button = $MarginContainer/GridContainer/JoinButton
@onready var _error_label: Label = $ErrorLabel


func _ready() -> void:
	if Networker.is_dedicated_server():
		return

	_host_button.pressed.connect(_on_host_button_pressed)
	_join_button.pressed.connect(_on_join_button_pressed)
	Networker.network_error.connect(_on_networker_network_error)
	_error_label.text = ""
	_name_edit.grab_focus()

	var file := FileAccess.open(SERVER_HISTORY_PATH, FileAccess.READ)
	if file:
		_server_history = file.get_as_text().strip_edges().split("\n")


func _input(event: InputEvent) -> void:
	if _address_edit.has_focus():
		if (
			event.is_action_pressed("ui_up")
			and _history_position + 1 <= _server_history.size()
		):
			_history_position += 1
			_set_address_from_history()

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


func _set_address_from_history() -> void:
	if _history_position > 0:
		var address := _server_history[-_history_position]
		_address_edit.text = address
	else:
		_address_edit.text = ""


func _display_error(message: String) -> void:
	_error_label.text = message


func _on_host_button_pressed() -> void:
	if !_name_edit.text:
		_display_error("Name cannot be empty")
		return

	Networker.set_local_player_info(_name_edit.text)
	Networker.host_game()


func _on_join_button_pressed() -> void:
	if !_name_edit.text:
		_display_error("Name cannot be empty")
		return

	_join_button.disabled = true
	_host_button.disabled = true

	var address := _address_edit.text

	if not (address in _server_history):
		_server_history.append(address)
		var file := FileAccess.open(SERVER_HISTORY_PATH, FileAccess.READ_WRITE)
		if file:
			file.seek_end()
			file.store_line(address)
		else:
			file = FileAccess.open(SERVER_HISTORY_PATH, FileAccess.WRITE)
			file.store_line(address)

	Networker.set_local_player_info(_name_edit.text)
	Networker.join_game(address)


func _on_networker_network_error(message: String) -> void:
	_join_button.disabled = false
	_host_button.disabled = false
	_display_error(message)