using System;
 
namespace DoFactory.GangOfFour.Facade.RealWorld
{
  /// 

  /// MainApp startup class for Real-World 
  /// Facade Design Pattern.
  /// 
  class MainApp
  {
	/// 

	/// Entry point into console application.
	/// 
    static void Main()
    {
      // Facade
      Mortgage mortgage = new Mortgage();
 
      // Evaluate mortgage eligibility for customer
      Customer customer = new Customer("Ann McKinsey");
      bool eligible = mortgage.IsEligible(customer, 125000);
 
Console.WriteLine(customer.Name+"has been"+(eligible?"Approved":"Rejected"));
 
      // Wait for user
      Console.ReadKey();
    }
  }
 
  /// 

  /// The 'Subsystem ClassA' class
  /// 
  class Bank
  {
    public bool HasSufficientSavings(Customer c, int amount)
    {
      Console.WriteLine("Check bank for " + c.Name);
      return true;
    }
  }
 
  /// 

  /// The 'Subsystem ClassB' class
  /// 
  class Credit
  {
    public bool HasGoodCredit(Customer c)
    {
      Console.WriteLine("Check credit for " + c.Name);
      return true;
    }
  }
 
  /// 

  /// The 'Subsystem ClassC' class
  /// 
  class Loan
  {
    public bool HasNoBadLoans(Customer c)
    {
      Console.WriteLine("Check loans for " + c.Name);
      return true;
    }
  }
 
  /// 

  /// Customer class
  /// 
  class Customer
  {
    private string _name;
 
    // Constructor
    public Customer(string name)
    {
      this._name = name;
    }
 
    // Gets the name
    public string Name
    {
      get { return _name; }
    }
  }
 
  /// 

  /// The 'Facade' class
  /// 
  class Mortgage
  {
    private Bank _bank = new Bank();
    private Loan _loan = new Loan();
    private Credit _credit = new Credit();
 
    public bool IsEligible(Customer cust, int amount)
    {
      Console.WriteLine("{0} applies for {1:C} loan\n",
        cust.Name, amount);
 
      bool eligible = true;
 
      // Check creditworthyness of applicant
      if (!_bank.HasSufficientSavings(cust, amount))
      {
        eligible = false;
      }
      else if (!_loan.HasNoBadLoans(cust))
      {
        eligible = false;
      }
      else if (!_credit.HasGoodCredit(cust))
      {
        eligible = false;
      }
 
      return eligible;
    }
  }
}