extends MeshInstance3D

signal speed_changed(new_speed: float)

@export_group("Train")
@export var base_speed: float = 15.0
@export var max_speed: float = 50.0
@export var min_speed: float = 3.0
@export var acceleration: float = 12.0

var current_speed: float = 15.0

func _ready() -> void:
	current_speed = base_speed


func _process(delta: float) -> void:
	_handle_input(delta)


func _handle_input(delta: float) -> void:
	if Input.is_action_pressed("speed_up"):
		current_speed = min(current_speed + acceleration * delta, max_speed)
		speed_changed.emit(current_speed)
	elif Input.is_action_pressed("speed_down"):
		current_speed = max(current_speed - acceleration * delta, min_speed)
		speed_changed.emit(current_speed)


func get_speed() -> float:
	return current_speed