class_name Car
extends CharacterBody2D

@export var debugLabel: Label
@export var speed = 750 # How fast the car will move (pixels/sec).
@export var timeToChangeVelocity = 0.5 # How long to break to a full stop

var targetedVelocity = 0
var current_speed = speed;
@onready var animation_tree := $AnimationTree
@onready var state_machine := animation_tree.get("parameters/driving/playback") as AnimationNodeStateMachinePlayback

var brakePedal = false;

var last_facing_direction = Vector2(0,-1) # facing north

var targetGlobalPosition = null
var direction = Vector2(0,0)

func moveTo(position: Vector2) -> void:
	targetGlobalPosition = position;

func updateFacingDirectionInAnimationTree():
	animation_tree.set("parameters/CarStates/driving/blend_position", last_facing_direction)
	animation_tree.set("parameters/CarStates/idling/blend_position", last_facing_direction)
	
func _ready() -> void:
	$AudioStreamPlayer2D.play()

# Called every frame. 'delta' is the elapsed time since the previous frame.
func _process(delta: float) -> void:
	var pitch = current_speed / speed
	if is_zero_approx(pitch):
		pitch = 0.01
	$AudioStreamPlayer2D.pitch_scale = pitch
	$ZIndexControler/ShapeCast2D.enabled = !$CollisionHorizontal.disabled
	var accelerationStep = (speed * delta / timeToChangeVelocity)

	if brakePedal:
		current_speed = max(targetedVelocity, current_speed - accelerationStep)
	else:
		current_speed = min(current_speed + accelerationStep, speed)

	if (targetGlobalPosition != null):
		direction = (targetGlobalPosition - global_position).normalized()
		velocity =  direction * current_speed
	
	move_and_slide()
	if velocity:
		last_facing_direction = velocity.normalized()
	updateFacingDirectionInAnimationTree()
	
func brake(wantedVelocity : int):
	brakePedal = true;
	targetedVelocity = wantedVelocity;

func accelerate():
	brakePedal = false;