feat: dragons moving freely

scenes/window/dragon.gd

@@ -8,7 +8,9 @@ var main_window_rect: Rect2i
 @onready var draggable: Draggable = $DragDropDetector
 
 var _walking: bool = false
+var _thinking_path: bool = false
 var _target_pos: Vector2
+var rng: RandomNumberGenerator = RandomNumberGenerator.new()
 
 signal place_back(dragon: Dragon)
 
@@ -17,13 +19,20 @@ func on_place_back() -> void:
 	place_back.emit(self)
 
 
+func _ready() -> void:
+	_pick_random_screen_position()
+
+
 func _process(delta: float) -> void:
 	if draggable.dragging:
 		_actual_position = position
 		return
 	
 	if not _walking:
-		_pick_random_screen_position()
+		if not _thinking_path:
+			_thinking_path = true
+			await get_tree().create_timer(rng.randf_range(2, 7)).timeout
+			_pick_random_screen_position()
 	
 	_move_to_target(delta)
 
@@ -33,8 +42,22 @@ func _move_to_target(delta: float):
 		var direction: Vector2 = (_target_pos - _actual_position).normalized()
 		_actual_position += dragon_speed * direction * delta
 		position = _actual_position
+		return
+	
+	_walking = false
 
 
 func _pick_random_screen_position() -> void:
 	_walking = true
-	_target_pos = Vector2i(10, 10)
+	_thinking_path = false
+
+	var display_index: int = DisplayServer.window_get_current_screen()
+	var work_area_position: Vector2i = DisplayServer.screen_get_usable_rect(display_index).position
+	var work_area_size: Vector2i     = DisplayServer.screen_get_usable_rect(display_index).size
+	
+	var random_pos: Vector2i = Vector2i(
+		work_area_position.x + rng.randi_range(10, work_area_size.x - 10 - size.x),
+		work_area_position.y + rng.randi_range(10, work_area_size.y - 10 - size.y)
+	)
+	
+	_target_pos = random_pos