extends Node3D

const statsTemplate := "FPS: %d\nPing: %d ms"

var runner_scene := preload("res://scenes/runner.tscn")
var _ping := 0.0
@onready var _runners_node: Node3D = %Runners

func spawn_player(player_id) -> void:
	if multiplayer.is_server():
		var runner = runner_scene.instantiate()
		runner.player_id = player_id
		runner.name = str(player_id)

		_runners_node.add_child(runner)

func _process(_delta: float) -> void:
	if DisplayServer.get_name() == "headless":
		return

	%StatsLabel.text = statsTemplate % [
		Engine.get_frames_per_second(),
		_ping,
	]

func _get_timestamp() -> int:
	return floor(Time.get_unix_time_from_system() * 1000)

func _on_ping_timer_timeout() -> void:
	if multiplayer.is_server():
		%PingTimer.stop()
		return

	_ping_call.rpc_id(1, _get_timestamp())

@rpc("any_peer", "call_remote", "unreliable", 99)
func _ping_call(timestamp: int) -> void:
	if multiplayer.is_server():
		_ping_call.rpc_id(multiplayer.get_remote_sender_id(), timestamp)
		return

	_ping = _get_timestamp() - timestamp