game: add enemy manager

scenes/main.tscn

@@ -4,7 +4,7 @@
 [ext_resource type="PackedScene" uid="uid://4xha2nhf8fya" path="res://scenes/test_level.tscn" id="1_o5qli"]
 [ext_resource type="PackedScene" uid="uid://ca2so8fm3q8fe" path="res://scenes/player.tscn" id="2_0wfyh"]
 [ext_resource type="PackedScene" uid="uid://b18uib08hvdpq" path="res://scenes/managers/main_ui.tscn" id="3_sugp2"]
-[ext_resource type="PackedScene" uid="uid://bn8c0cgecvjxl" path="res://scenes/enemies/enemy.tscn" id="5_tbgi4"]
+[ext_resource type="PackedScene" uid="uid://dy73qrxcgrwg3" path="res://scenes/managers/enemy_manager.tscn" id="5_tbgi4"]
 
 [node name="Main" type="Node2D"]
 script = ExtResource("1_jyhfs")
@@ -22,5 +22,5 @@ position = Vector2(1057, 798)
 camera = NodePath("../MainCamera")
 main_ui = NodePath("../MainUI")
 
-[node name="Enemy" parent="." node_paths=PackedStringArray("target") instance=ExtResource("5_tbgi4")]
+[node name="EnemyManager" parent="." node_paths=PackedStringArray("target") instance=ExtResource("5_tbgi4")]
 target = NodePath("../Player")

scenes/managers/enemy_manager.gd

@@ -0,0 +1,24 @@
+class_name EnemyManager
+extends Node2D
+
+@export var max_enemies: int
+@export var spawn_rate: float
+@export var target: CollisionObject2D
+
+@onready var timer: Timer = $Timer
+
+var enemy_scene = preload("res://scenes/enemies/enemy.tscn")
+
+func _ready() -> void:
+	timer.wait_time = spawn_rate / 1
+	timer.start()
+
+
+func _on_timer_timeout() -> void:
+	var enemies = get_tree().get_nodes_in_group(GlobalConst.GROUP_ENEMY)
+	GlobalConst.sig_debug_stats_set.emit("enemy_count", "%s" % len(enemies))
+	if len(enemies) < max_enemies:
+		var new_enemy = enemy_scene.instantiate()
+		new_enemy.position = target.position + Vector2(50, 50)
+		new_enemy.target = target
+		add_child(new_enemy)

scenes/managers/enemy_manager.gd.uid

@@ -0,0 +1 @@
+uid://bccq4dt00s2ej

scenes/managers/enemy_manager.tscn

@@ -0,0 +1,12 @@
+[gd_scene load_steps=2 format=3 uid="uid://dy73qrxcgrwg3"]
+
+[ext_resource type="Script" uid="uid://bccq4dt00s2ej" path="res://scenes/managers/enemy_manager.gd" id="1_tfsap"]
+
+[node name="EnemyManager" type="Node2D"]
+script = ExtResource("1_tfsap")
+max_enemies = 50
+spawn_rate = 1.0
+
+[node name="Timer" type="Timer" parent="."]
+
+[connection signal="timeout" from="Timer" to="." method="_on_timer_timeout"]