extends Node2D

var speed = 85
var minSpeed = -50

var decelDelay = 2.6
var decel = 82

var fadeDelay = 2.2
var fadeSpeed = 0.2
var fadeAccel = 0.13

var opacity = 0

var fadingIn = true
var fadeInSpeed = 0.9

func _ready():
	set_opacities(opacity)

func _process(delta):
	if decelDelay <= 0:
		if speed > minSpeed:
			speed -= decel * delta
	else:
		decelDelay -= delta
	
	if fadingIn:
		opacity += fadeInSpeed * delta
		if opacity >= 1:
			opacity = 1
			fadingIn = false
	elif fadeDelay <= 0:
		opacity -= fadeSpeed * delta
		fadeSpeed += fadeAccel * delta
	else:
		fadeDelay -= delta
	
	set_opacities(opacity)
	translate(Vector2(0, speed * -1) * delta)

func set_opacities(opacity):
	$Water.modulate.a = opacity
	$Foam.modulate.a = opacity + 0.15
	if $Foam.modulate.a > 1:
		$Foam.modulate.a = 1
	
	if !fadingIn and opacity <= 0:
		queue_free()