#include "stdafx.h"
#include "CreditCard.h"
#include <iostream>
#include <fstream>
#include <ctime>
#include <sstream>

using namespace std;

CreditCard::CreditCard()
{
	string fName;
	ifstream fin;
	ostringstream n;

	srand((unsigned)time(0));
	Ano = (rand() % 100000) + 1;
	n << Ano << flush;
	fName = "CC" + n.str() + ".txt";
	fin.open(fName.c_str());
	while (fin.is_open())
	{
		fin.close();
		Ano = (rand() % 100000 + 1);
		n << Ano << flush;
		fName = "CC" + n.str() + ".txt";
		fin.open(fName.c_str());
	}
	fin.close();
	vCLimit = 1000;
	vBalDue = 0;
	CCName = fName;
	CCLName = "CCL" + n.str() + ".txt";
	writestatus();
	writelog("Account " + n.str() + "opened. ");
}
CreditCard::CreditCard(int a)
{
	string fName;
	ifstream fin;
	ostringstream n;
	vErr = false;

	n << a << flush;
	fName = "CC" + n.str() + ".txt";
	fin.open(fName.c_str());
	if (fin.is_open())
	{
		Ano = a;
		fin >> vCLimit;
		fin >> vBalDue;
		fin.close();
		CCName = fName;
		CCLName = "CCL" + n.str() + ".txt";
		writelog("Account " + n.str() + " reopened. ");
	}
	else
	{
		Ano = 0;
		vCLimit = 0;
		vBalDue = 0;
		vErr = true;
		vEMsg = "Account " + n.str() + "could not be opened. ";
	}
}
void CreditCard::applyCharge(int charge)
{
	vBalDue = vBalDue + charge;
	vCLimit = vCLimit - charge;
}
void CreditCard::applyPayment(int payment)
{
	vBalDue = vBalDue - payment;
	vCLimit = vCLimit + payment;
}
int CreditCard::getAcctNo()
{
	return Ano;
}
double CreditCard::getCreditLimit()
{
	return vCLimit;
}
double CreditCard::getBalanceDue()
{
	return vBalDue;
}
void CreditCard::writestatus()
{
	vErr = false;
	vEMsg = "";
	ofstream fout;
	fout.open(CCName.c_str());
	if (fout.is_open())
	{
		fout << vCLimit << endl;
		fout << vBalDue << endl;
		fout.close();
	}
	else
	{
		vErr - true;
		vEMsg = "Unable to write status file. ";
	}
}
void CreditCard::writelog(string m)
{
	vErr = false;
	vEMsg = "";
	time_t rawtime;
	time(&rawtime);

	ofstream fout;
	fout.open(CCLName.c_str(), ios_base::app);
	if (fout.is_open())
	{
		fout << m << " on " << ctime(&rawtime) << endl;
		fout.close();
	}
	else
	{
		vErr = true;
		vEMsg = "Unable to write log entry: " + m;
	}
}
CreditCard::~CreditCard()
{
}