/* Name: account.cpp 
 * Purpose: Implementation File for Bank Account Class            
 * Author: Dr. Michael A. Redmond
 * Date Written: 05/04/98
 * Date Revised:
 * NOTES: 
*/





// in account.cpp

#include<String.h>   // allows string handling
#include<assert.h>   // allows rough pre-condidtion checking
#include "account.h"

// First some non-object-oriented functions useful to the class

// obtain a random digit
char GetRandDigit() {
	char dig;
	int x = rand() % 10;
	switch (x) {
	case 0:
		dig = '0';
		break;
	case 1:
		dig = '1';
		break;
	case 2:
		dig = '2';
		break;
	case 3:
		dig = '3';
		break;
	case 4:
		dig = '4';
		break;
	case 5:
		dig = '5';
		break;
	case 6:
		dig = '6';
		break;
	case 7:
		dig = '7';
		break;
	case 8:
		dig = '8';
		break;
	case 9:
		dig = '9';
		break;
	default:
		dig = 'X';  // should never happen
	}
	return dig;
}


// Develop a random account number by randomly generating chars and
// concatenating them together
//    problem is that it doesn't result in number that is
//    guaranteed to not already be being used
string GetRandomValidAcctNum () {
	string acct = "";
	// assume 4 digit account numbers
	for (int cnt = 0;cnt < 4;cnt++) {
		// generate a random digit
		char newDig = GetRandDigit();
		// add to the end of account number so far
		acct += newDig;
	}
	// really should add a check digit
	return acct;
}


// for now just a dummy function
string DetermineNextAvailValidAcctNum () {

    // dont know how to this; temporarily just return any old string

    return string("1345");
  }

// default constructor - initializes to zero balance and random acct num
//Account::Account() : acctNum(DetermineNextAvailValidAcctNum()),
Account::Account() : acctNum(GetRandomValidAcctNum()),
                     balance(0) {
   }

// parameterized constructor - client specifies the account number and 
//    (possibly) the balance (defaults to 0)
Account::Account(const string& numb, double bal) : acctNum(numb),
                     balance(bal) {
   }

// deposit money into the account
bool Account::Deposit (double amt) {
   // assert(amt > 0);
	// ensure valid amount
	if (amt <= 0) {
       cerr << "Tried to deposit zero or negative amount - Sorry" << endl;
		return false; // cannot deposit
	}
	else {
		balance = balance + amt;  // update account balance
		return true;
	}
   return true; // should never hit
  }

// withdraw money from the account
bool Account::Withdraw (double amt) {
   // assert(amt > 0);
	// ensure enough money in count
   if (amt > balance) {
      cerr << "Tried to withdraw more " << amt << " than in account " << balance << " - Sorry" << endl;
	  return false;
     }
   // ensure amount is valid
   else if (amt <= 0) {
       cerr << "Tried to deposit zero or negative amount - Sorry" << endl;
	   return false;
   }
   // valid amount
   else {
      balance = balance - amt;   // update balance
	  return true;
     }
   return true;    // should never get here
  }

// report account balance
double Account::GetBal () {
   return balance;
  }

// report account number
string Account::GetAcctNum () {
   return acctNum;
  }

// report whether a given account number is the one for an account
bool Account::ThisAcct (const string & acctNum) {
	string curr = GetAcctNum();
	if (curr == acctNum) {
		return true;
	}
	else {
		return false;
	}
	return false;  // should never execute
}


// allows outputting all info about account
ostream& operator << (ostream & strOut, Account & myAcct) {
	strOut << "Acct# " << myAcct.GetAcctNum() << "  Bal: " << myAcct.GetBal() << " ";
	return strOut;
}