#include "RandomBuyStrategy.h"
#include <stdlib.h>
#include "Stock.h"

RandomBuyStrategy::RandomBuyStrategy( double probability, double fluctuation, double maxBuy ) :
  probability_( probability ), fluctuation_( fluctuation ), maxBuy_( maxBuy )
{
}

RandomBuyStrategy::~RandomBuyStrategy()
{
}

long RandomBuyStrategy::buy( Stock* stock, double capital, double buyPrice, long amount )
{
  if ( drand48() > probability_ ) return 0;
  double fluct = ( 1.0 + fluctuation_* (drand48() - 0.5) ); 
  price_ = stock->price() * fluct;
  long maxAmount = (long) ( capital / price_ );
  amount =(long)( drand48() * maxAmount * maxBuy_ );
  return amount;
}