#include <float.h>

#include "stock.h"
#include "CPstring.h"


// Constants
static const double DEFAULT_VOLATILITY = 0.0;   // default volatility
static const double NULL_PRICE = DBL_MIN;       // default price
static const string NO_SYMBOL = "No Symbol";    // default symbol
static const string DEFAULT_NAME   = "No Name"; // default name
static const char DEFAULT_EXCHANGE = '?';       // default exchange

// ***********************************************
// Member Functions of Stock class
//
// ***********************************************

Stock::Stock() 
// postcondition:  Fields initializes to DEFAULT values
  : mySymbol(NO_SYMBOL), 
    myExchange(DEFAULT_EXCHANGE),
    myLast(NULL_PRICE),
    myVolume(0),
    myChange(NULL_PRICE),
    myVolatility(DEFAULT_VOLATILITY),
    myCompanyName(DEFAULT_NAME)
{
}

Stock::Stock(const string & symbol, char Exchange, double price, 
	     unsigned int volume, double volatility,
	     const string & name)
// postcondition: all fields initialized to given data
  : mySymbol(symbol), 
    myExchange(Exchange),
    myLast(price),
    myVolume(volume),
    myChange(0.0),
    myVolatility(volatility),
    myCompanyName(name)
{
}

void Stock::SetSymbol(const string & symbol)
// postcondition:  Stock's symbol is set to symbol
{
   mySymbol = symbol;
}

void Stock::SetExchange(char Exchange)
// postcondition: Stock's exchange is set to Exchange
{
   myExchange = Exchange;
}
 
void Stock::SetLast(double price)
// postcondition: Stock's last price is set to price
//                stock's "change" is initialized to 0
{
   myLast  = price;
   myChange = 0.0;
}

void Stock::SetCompanyName(const string & name)
// postcondition: stock's company name is set to name
{
   myCompanyName = name;
}

void Stock::AddTrade(double Price, unsigned int shares)
// postcondition: Stock's Last, volume, and change updated
{
   myChange += (Price - myLast);     // calculate the change
   myLast = Price;                   // new last price
   myVolume += shares;               // total volume increases
}

string Stock::GetSymbol () const
// postcondition: returns stock's symbol
{
   return mySymbol;
}

string Stock::GetCompanyName() const
// postcondition: returns company name
{
   return myCompanyName;
}

char Stock::GetExchange() const
// returns stock exchange
{
   return myExchange;
}


double Stock::GetLast() const
// returns last
{
   return myLast;
}

double Stock::GetChange() const
// returns change in stock
{
   return myChange;
}

unsigned int Stock::GetVolume() const 
// returns volume of stock traded
{
   return myVolume;
}


double Stock::GetVolatility() const
//Post Condition:  Returns volatility
{
   return myVolatility;
}

void Stock::Print() const
{
   cout << mySymbol << '\t' << myExchange << '\t' << myLast << '\t' 
	<< myChange << '\t' << myVolume << '\t' << myCompanyName << endl;
}