#include "Stock.h"
#include <iostream>

const unsigned int Stock::historySize = 100;

Stock::Stock( const string& symbol, double price ) : 
  symbol_( symbol )
{
  for ( int i = 0; i < historySize; i++ ) 
    history_.push_front( price );
}

double Stock::price() const
{
  return history_.front();
}

void Stock::setPrice( double price )
{
  history_.push_front( price );
  history_.pop_back();
}

double Stock::gain( unsigned int time ) const
{
  assert( time < historySize );
  double price1 = price();
  double price0 = history_[ time ];
  return ( price1 - price0 ) / price0; 
}

void Stock::printHistory() const
{
  cout << "stock "<< symbol_ << " history: ";
  deque<double>::const_iterator i;
  for ( i = history_.begin(); i != history_.end(); i++ )
    cout << *i << " ";
  cout << endl;
}