Instanciate a ball

Make the enemy throw a ball. It just instanciate a ball in the scene but
does not move it.

scripts/can_throw_ball_condition.gd

@@ -0,0 +1,7 @@
+class_name CanThrowBallCondition
+extends ConditionLeaf
+
+func tick(actor, _blackboard):
+	if !actor.has_thrown_ball:
+		return SUCCESS
+	return FAILURE

scripts/enemy.gd

@@ -3,6 +3,8 @@ extends CharacterBody2D
 
 const Y_SPAWN_OFFSET = -8
 @export var speed = 80
+var has_thrown_ball = false
+var ball_scene = preload("res://scenes/ball.tscn")
 @onready var tile_map: TileMap = get_parent()
 @onready var animation_player = $AnimationPlayer
 @onready var sprite = $Sprite2D
@@ -11,3 +13,8 @@ func _ready():
 	var spawn_cell: Vector2i = tile_map.get_top_spawn_cell()
 	position = tile_map.map_to_local(spawn_cell)
 	position.y += Y_SPAWN_OFFSET
+
+func throw_ball():
+	var ball = ball_scene.instantiate()
+	ball.position = position
+	tile_map.add_child(ball)

scripts/throw_ball_action.gd

@@ -0,0 +1,25 @@
+class_name ThrowBallAction
+extends ActionLeaf
+
+var has_animation_finished = false
+
+func before_run(actor, _blackboard):
+	actor.animation_player.animation_finished.connect(_on_animation_finished)
+	actor.animation_player.speed_scale = 0.8
+
+func tick(actor, _blackboard):
+	actor.animation_player.play("throw")
+	
+	if !has_animation_finished:
+		return RUNNING
+	else:
+		actor.throw_ball()
+		actor.has_thrown_ball = true
+		return SUCCESS
+
+func after_run(actor, _blackboard):
+	actor.animation_player.play("idle")
+	actor.animation_player.speed_scale = 1
+
+func _on_animation_finished(_anim_name):
+	has_animation_finished = true

scripts/wait_action.gd

@@ -4,5 +4,5 @@ extends ActionLeaf
 func before_run(actor, _blackboard):
 	actor.animation_player.play("idle")
 
-func tick(actor, blackboard):
+func tick(_actor, _blackboard):
 	return RUNNING