extends Sprite2D

signal health_changed(old_value, new_value)
signal health_depleted

var speed: int            = 40
var max_speed: int        = 500
var angular_speed: float  = PI * 0.15
var motion: Vector2       = Vector2()
var angular_motion: float = 0

var react_to_input: bool  = true

var health: int = 100

func _ready() -> void:
	var timer: Timer = get_node("Timer")
	timer.timeout.connect(_on_timer_timeout)

func _on_timer_timeout() -> void:
	modulate.a = 1 if modulate.a == 0.5 else 0.5

func _process(delta: float) -> void:
	angular_motion = signf(angular_motion) * abs(angular_motion) * 0.9
	motion = motion * 0.9

	if react_to_input:
		var direction: float = 0
		if Input.is_action_pressed("ui_left"):
			direction -= 1
		if Input.is_action_pressed("ui_right"):
			direction += 1
		angular_motion += angular_speed * direction * delta

		if Input.is_action_pressed("ui_up"):
			var velocity: Vector2 = Vector2.UP.rotated(rotation) * speed
			motion += velocity * delta
		if Input.is_action_pressed("ui_down"):
			var velocity: Vector2 = Vector2.DOWN.rotated(rotation) * speed
			motion += velocity * delta

		if motion.length() > max_speed:
			motion = motion.normalized() * max_speed

	rotation += angular_motion
	position += motion


func _on_button_pressed() -> void:
	react_to_input = not react_to_input
	var new_health: int = health - 10
	health_changed.emit(health, new_health)
	health = new_health
	if health <= 0:
		health_depleted.emit()
		queue_free()