extends Node2D

var timer: Timer
var asteroids := [
	preload('res://Enemies/Scenes/asteroidTiny.tscn'),
	preload('res://Enemies/Scenes/asteroidSm.tscn'),
	preload('res://Enemies/Scenes/asteroid.tscn'),
	preload('res://Enemies/Scenes/asteroidBig.tscn')
]
var screen_size: Vector2

func _ready():
	Game.spawner = self
	
	screen_size = get_viewport_rect().size
	# Call spawn_enemy() every spawn_interval seconds
	timer = Timer.new()
	timer.wait_time = spawn_time_from_score(Game.score)
	timer.timeout.connect(spawn_enemy)
	add_child(timer)
	
func spawn_time_from_score(score: int) -> float:
	var min_time = 0.3
	var max_time = 2.0
	var max_score = 50000.0
	
	# Clamp score so it doesn’t overshoot
	var clamped_score = clamp(score, 0, max_score)
	
	# Normalized value [0..1]
	var t = float(clamped_score) / max_score
	
	# Logarithmic easing (slows down progression)
	# Use log10 but you can tweak the base for different curves
	var curved_t = log(1.0 + 9.0 * t) / log(10.0)  # maps 0..1 to 0..1, but with log shape
	
	# Interpolate between max_time and min_time
	return lerp(max_time, min_time, curved_t)

func spawn_enemy():
	var enemy = asteroids[randi_range(0, 3)].instantiate()
	var pos = get_random_edge_position()
	enemy.position = pos
	
	# Direction vector toward center
	var center = screen_size * 0.5
	var dir = (center - pos).normalized()
	
	# Add some randomness so it's not always perfect
	var angle_variation = randf_range(-0.5, 0.5) # radians (~±14 degrees)
	dir = dir.rotated(angle_variation)
	
	# Apply starting velocity
	enemy.rot_velocity = randf_range(0, PI)
	enemy.velocity = dir * randf_range(50, 200)
	enemy.rotation = randf_range(0, PI)
	
	var scl = randi_range(1, 5)
	enemy.scale = Vector2(scl, scl)
	
	enemy.add_to_group("enemies")
	add_child(enemy)
	
	timer.wait_time = spawn_time_from_score(Game.score)

func get_random_edge_position() -> Vector2:
	# Pick which edge (0=top,1=bottom,2=left,3=right)
	var edge = randi() % 4
	match edge:
		0: # top
			return Vector2(randf() * screen_size.x, 0)
		1: # bottom
			return Vector2(randf() * screen_size.x, screen_size.y)
		2: # left
			return Vector2(0, randf() * screen_size.y)
		3: # right
			return Vector2(screen_size.x, randf() * screen_size.y)
	return Vector2.ZERO
	
func stop():
	timer.stop()
	
func start():
	timer.start()