include <CarFactory.h>
  include <vector>
  
  using namespace std;
  
  CarFactory* getLeastBusyFactory(const vector<CarFactory*>& inFactories)
  {
    if (inFactories.size() == 0) return NULL;
  
    CarFactory* bestSoFar = inFactories[0];
  
    for (size_t i = 1; i < inFactories.size(); i++)
      {
        if (inFactories[i]->getNumCarsInProduction() <
            bestSoFar->getNumCarsInProduction()) {
          bestSoFar = inFactories[i];
        }
      }
  
    return bestSoFar;
  }
  
  int main(int argc, char** argv)
  {
    vector<CarFactory*> factories;
  
    // Create 3 Ford factories and 1 Toyota factory. 
    FordFactory* factory1 = new FordFactory();
    FordFactory* factory2 = new FordFactory();
    FordFactory* factory3 = new FordFactory();
    ToyotaFactory* factory4 = new ToyotaFactory();
  
    // To get more interesting results, pre-preorder some cars.
    factory1->requestCar();
    factory1->requestCar();
    factory2->requestCar();
    factory4->requestCar();
  
    // Add the factories to a vector.
    factories.push_back(factory1);
    factories.push_back(factory2);
    factories.push_back(factory3);
    factories.push_back(factory4);
  
    // Build 10 cars from the least busy factory.
    for (int i = 0; i < 10; i++) {
      CarFactory* currentFactory = getLeastBusyFactory(factories);
      Car* theCar = currentFactory->requestCar();
      theCar->info();
    }
  }