import java.util.ArrayList;

public class Auction
{
  private ArrayList<Lot> lots;
  private int nextLotNumber;

  public Auction()
  {
    lots = new ArrayList<Lot>();
    nextLotNumber = 1;
  }

  public void enterLot(String description)
  {
    lots.add(new Lot(nextLotNumber, description));
    nextLotNumber++;
  }

  public void showLots()
  {
    for(Lot lot : lots)
    {
        System.out.println(lot.toString());
    }
  }

  public void makeABid(int lotNumber, Person bidder, long value)
  {
    Lot selectedLot = getLot(lotNumber);
    if (selectedLot != null)
    {
      boolean succesful = selectedLot.bidFor(new Bid(bidder, value));
      if (succesful)
      {
        System.out.println("The bid for lot number " + lotNumber + " was succesful.");
      }
      else
      {
        Bid highestBid = selectedLot.getHighestBid();
        System.out.println("Lot number: " + lotNumber + " already has a bid of: " + highestBid.getValue());
      }
    }
  }

  public Lot getLot(int lotNumber)
  {
    if((lotNumber >= 1) && (lotNumber < nextLotNumber))
    {
      Lot selectedLot = lots.get(lotNumber-1);
      if (selectedLot.getNumber() != lotNumber)
      {
        System.out.println("Internal error: Lot number " + selectedLot.getNumber() + " was returned instead of " + lotNumber);
        selectedLot = null;
      }
      return selectedLot;
    }
    else
    {
      System.out.println("Lot number: " + lotNumber + " does not exist.");
      return null;
    }
  }

  public void close()
  {
    System.out.println("Closing auction.");
    for (Lot lot : lots)
    {
      System.out.println(lot.getNumber() + ": " + lot.getDescription());
      if (lot.getHighestBid() == null)
      {
        System.out.println (" (No bids) ");
      }
      else
      {
        Bid highestBid = lot.getHighestBid();
        System.out.println(" sold to " + highestBid.getBidder().getName() + " for " + highestBid.getValue());
      }
    }
  }
}