import java.util.*;
import BankAccounts.*;
public class BankAccountClient
{
   static Random generator = new Random();
   static ArrayList<BankAccount> accounts = new ArrayList<>();
   
   public static void main(String[] args)
   {
      
      //Create a random number of BankAccounts (Checking & Savings)
      openAccounts();   display();
      
      //Run randomly generated transactions on randomly selected BankAccounts
      runTransactions();   display();
      
      //Perform end-of-billing-cycle processing of all BankAccounts
      endOfCycleProcessing(); display();
   }
   
   //Create a random number of BankAccounts
   //The type (Checking, Savings) and initial banalce are randomly generated
   public static void openAccounts()
   {
      int numberOfAccounts = generator.nextInt(11) + 10; //10 .. 20
      for (int k = 1; k <= numberOfAccounts; k++)
      {
         double amount = (generator.nextInt(41) + 10) * 100.0; //Balance $1000 .. $5000
         BankAccount acct = generator.nextBoolean() ?          //Select type of account
                              new SavingsAccount(amount) :
                              new CheckingAccount(amount)   ;
         accounts.add(acct);
      }
   }
   
   //Perform a random number of randomly selected deposit() and withdraw()
   // transactions on randomly selected BankAccounts
   public static void runTransactions()
   {
      int numberOfTransactions = 80 + generator.nextInt(41);   //80 .. 120
      for (int k = 1; k <= numberOfTransactions; k++)
      {
         //Randomly selected BankAccount
         BankAccount account = accounts.get( generator.nextInt(accounts.size()) );
         
         //Random transaction amount: $100 .. $700
         double amount = (generator.nextInt(7) + 1) * 100.0;
         
         if (generator.nextBoolean())     //Randomly chosen transaction
            account.deposit(amount);      //    deposit()
         else
            try
            {
               account.withdraw(amount);  //    withdraw()
            }
            catch (RuntimeException rtex)
            {                             //Anticipating Insufficient Funds
               System.out.println(rtex.getMessage() + 
                                  " Account #" + account.getAccountNumber());
            }
      }
   }
   
   //Perform end-of-billing-cycle processing of ALL BankAccounts
   public static void endOfCycleProcessing()
   {
      for (BankAccount acct : accounts)
         acct.endOfCycleProcessing();
   }

   //Display a listing of ALL BankAccounts
   public static void display()
   {
      System.out.println();
      for (BankAccount acct : accounts)
         System.out.println(acct);
   }
}