package fauxExchange;

import java.util.*;

class AuctionRule implements Rule{
	public Trade processRule(OrderBook ob, Order o){
		Iterator buyOrders = ob.getBuyOrders();
		Iterator sellOrders = ob.getSellOrders();
		Order buyOrder = (Order)buyOrders.next();
		Order sellOrder = (Order)sellOrders.next();
		int size = buyOrder.getSize();
		
		if(sellOrder.getSize() < size)size = sellOrder.getSize();
		
		buyOrder.setSize(buyOrder.getSize() - size);
		sellOrder.setSize(sellOrder.getSize() - size);
		
		if(buyOrder.getSize() == 0)ob.deleteOrder(buyOrder);
		if(sellOrder.getSize() == 0)ob.deleteOrder(sellOrder);
		Trade tmp = new Trade(buyOrder, sellOrder, ob.getOpeningPrice(), size);
		
		ob.print(null);
		System.out.println(ob.getOpeningPrice());
		
		return tmp;			
	}
	
		
	public boolean fitsCriteria(OrderBook ob, Order o){
		Iterator buyOrders =ob.getBuyOrders();
		Iterator sellOrders = ob.getSellOrders();
		Order sellOrder, buyOrder;
		if(buyOrders.hasNext() && sellOrders.hasNext()){
			sellOrder = (Order)sellOrders.next();
			buyOrder = (Order)buyOrders.next();
			
			if((sellOrder.isMarket()||buyOrder.isMarket())
				||(sellOrder.getPrice() <= buyOrder.getPrice())){
					return true;
			}
		}
		return false;
	}
	
}