Debit building first then warehouse

src/engine/gameManager/ForgeManager.java

@@ -141,7 +141,8 @@ public enum ForgeManager implements Runnable {
             workOrder.production_cost_total.putAll(workOrder.production_cost);
             workOrder.production_cost_total.forEach((key, value) -> workOrder.production_cost_total.put(key, value * workOrder.total_to_produce));
 
-            // Deduct gold cost from building
+            // Debit gold and resource cost from forge
+            // and / or warehouse
 
             if (!debitWorkOrderCost(workOrder))
                 return 58; //58: The formula is beyond the means of this facility
@@ -387,17 +388,37 @@ public enum ForgeManager implements Runnable {
 
     public static boolean debitWorkOrderCost(WorkOrder workOrder) {
 
-        int strongbox = workOrder.vendor.building.getStrongboxValue();
-
         if (workOrder.vendor.building.getCity() == null)
             return false;
 
+        int strongbox = workOrder.vendor.building.getStrongboxValue();
+
+        // Strongbox can cover total gold cost;
+
+        if (workOrder.production_cost_total.get(mbEnums.ResourceType.GOLD) <= strongbox) {
+
+            workOrder.vendor.building.setStrongboxValue(strongbox - workOrder.production_cost_total.get(mbEnums.ResourceType.GOLD));
+            workOrder.production_cost_total.put(mbEnums.ResourceType.GOLD, 0);
+
+            // Early exit for the forge covering gold only rolls
+
+            if (workOrder.production_cost_total.size() == 1)
+                return true;
+
+        } else {
+            int remainingAmount = workOrder.production_cost_total.get(mbEnums.ResourceType.GOLD) - strongbox;
+            workOrder.vendor.building.setStrongboxValue(0);
+            workOrder.production_cost_total.put(mbEnums.ResourceType.GOLD, workOrder.production_cost_total.put(mbEnums.ResourceType.GOLD, workOrder.production_cost_total.get(mbEnums.ResourceType.GOLD) - remainingAmount));
+        }
+
+        // There is an overflow at this point and a warehouse is required
+
         Warehouse warehouse = workOrder.vendor.building.getCity().warehouse;
 
         if (warehouse == null)
             return false;
 
-        // Deduct total cost from warehouse
+        // Deduct total production cost from warehouse
 
         workOrder.production_cost_total.forEach((key, value) -> warehouse.resources.put(key, warehouse.resources.get(key) - value));
         DbManager.WarehouseQueries.UPDATE_WAREHOUSE(warehouse);