CyberTower/scripts/enemy_farm.gd

extends Node2D

signal enemy_defeat

@export var common_parent: Node2D
@export var path_follow: PathFollow2D

@export var target: PackedScene
@export var common_target: Node2D

@export var respawn_timer: Timer
@export var respawn_duration = 2.0
@export var respawn_multiplier = 0.25

func spawn():
	var instance = target.instantiate()
	
	# Randomize
	path_follow.progress_ratio = randi()
	instance.position = path_follow.position
	
	var target_scale = randf_range(0.2, 0.95)
	instance.scale = Vector2(target_scale, target_scale)
	instance.speed = randi_range(800, 1400)
	
	instance.target = common_target
	instance.connect("enemy_defeat", _on_enemy_defeat)

	# Add into common parent
	common_parent.add_child(instance)

func _on_wave_finished():
	for child in common_parent.get_children():
		if not child is Timer:
			child.queue_free()
	respawn_timer.stop()

func _on_wave_started(count):
	var additional = respawn_multiplier * (count - 1)
	respawn_timer.wait_time = respawn_duration - additional
	respawn_timer.start()

func _on_enemy_defeat():
	enemy_defeat.emit()