extends Area2D

export var speed = 3  # How fast the player will move (pixels/sec).
export var jump_speed = 4
export var speed_inc = 0.3

signal start	# The bird starts
signal passed	# The bird passes a Tower
signal hit		# The bird is hit/flies off screen

var tower_locations = []

var screen_size
var playing = false

var speed_y = 0

var x_offset

func start():
	position = screen_size / 2

# Called when the node enters the scene tree for the first time.
func _ready():
	screen_size = get_viewport_rect().size
	x_offset = get_global_transform().get_origin().x

func _process(delta):
	if Input.is_action_just_pressed("ui_accept"):
		if not playing:
			emit_signal("start")
			speed_y = 0
			playing = true
			$CollisionShape2D.set_deferred("disabled", false)
		speed_y = min(speed_y, 0) - 1 * jump_speed

	if not playing:
		return

	speed_y += speed_inc
	
	position += Vector2(speed, speed_y * speed)
	
	var global = get_global_transform().get_origin()
	while global.x - x_offset > tower_locations[0]:
		emit_signal("passed")
		tower_locations.pop_front()

	rotation = atan(speed_y / speed)
	
	if position.y > screen_size.y: 
		emit_signal("hit")
		print(position)
		playing = false

func _on_Player_body_entered(body):
	playing = false
	#hide()  # Player disappears after being hit.
	emit_signal("hit")
	$CollisionShape2D.set_deferred("disabled", true)
	
func _on_Tower_spawn(x):
	tower_locations.append(x)