extends Node2D

# TODO: Display a game over screen when the ship is hit by a comet with abilty to restart
# TODO: Make a space like background, maybe some scrolling, maybe randomly generated
# TODO: Make a small title screen that starts before the game scene
# TODO: MAYBE track high score in a file & show it on HUD

const COMET_SPAWNER = preload("res://scenes/comet_spawner.tscn")

@export var level : int = 1

var score : int = 0
var points_per_comet := 300

func _ready() -> void:
	new_level(level)

func _process(_delta: float) -> void:
	update_ui()

func new_level(current_level : int) -> void:
	var comet_spawner := COMET_SPAWNER.instantiate()
	comet_spawner.comet_count *= current_level
	comet_spawner.comet_shot.connect(increase_score)
	comet_spawner.screen_cleared.connect(level_finished)
	self.add_child(comet_spawner)

func level_finished() -> void:
	level += 1
	new_level(level)

func game_over() -> void:
	pass

func increase_score(comet_size : int) -> void:
	# We add one since comet_size starts count at 0
	comet_size += 1
	score += points_per_comet / comet_size

func update_ui()-> void:
	# Label strings must be all caps for font to render proper
	$UI/Score.text = "SCORE: " + str(score)
	$UI/Level.text = "LEVEL: " + str(level)