extends Node

export (PackedScene) var Tower = preload("res://Tower.tscn");

onready var screen_size = Vector2(ProjectSettings.get("display/window/size/width"), ProjectSettings.get("display/window/size/height"))
onready var player = get_node("Player")

export var tower_density = 200
var last_built = 100

func build_tower():
	var tower = Tower.instance()
	tower.connect("exit", self, "_on_Tower_exit")
	var pos = Vector2(last_built, randf() * screen_size.y - screen_size.y / 2)  # The player's movement vector.
	tower.position = pos
	
	add_child(tower)
	last_built += tower_density

func update_view():
	var canvas_transform = get_viewport().get_canvas_transform()
	var pos = player.position
	pos.y = 0
	canvas_transform[2] = -pos + screen_size / 2
	get_viewport().set_canvas_transform(canvas_transform)

func _ready():
	randomize()
	update_view()
	
	print(screen_size)
	while last_built < screen_size.x * 2:
		build_tower()
	
func _on_Player_move():
	update_view()

func _on_Tower_exit():
	build_tower()