#include <iostream>
#include <fstream>

#include <string>

using namespace std;

void OpenTheFile(ifstream & aFile);
float GetStartingBalance(ifstream & aFile);
void GetTransaction(ifstream & aFile, char & type, float & amount);
void ProcessTransaction(char type, float amount, float & balance);


int main() {
    ifstream theFile;
    float balance{0};
    float value;
    char transactionType;

   OpenTheFile(theFile);

   balance = GetStartingBalance(theFile);

   GetTransaction(theFile, transactionType, value);
// while there are valid transactions
   while (theFile) {
       cout <<" Just got transaction " << transactionType 
             << " " << value << endl;
//     Process the transaction
       ProcessTransaction(transactionType, value, balance);
       GetTransaction(theFile, transactionType, value);
   }
   theFile.close();
   cout << "The final balance is $" << balance << endl;

    return 0;
}

void ProcessTransaction(char type, float amount, float & balance){
     switch(type) {
         case 'D': 
             balance += amount;
             break;
         case 'W':
             balance -= amount;
             break;
         default:
             cout << "There is an error in the transaction" << endl;
     }

     return;


}

void GetTransaction(ifstream & aFile, char & type, float & amount){
     int tNumber;
     string date;
     char junk;

     // get the transaction number as an int
     aFile >> tNumber;
     // get the date as a string
     aFile >> date;
     // get the type as a char
     aFile >> type;
     // get the $ as a char
     aFile >> junk;
     // get the amount as a float.
     aFile >> amount;

     return;
}


float GetStartingBalance(ifstream & aFile){
    char junk;
    float bal;

    // read in the $
    // read in the balance
    // return the balance
    
    aFile >> junk;
    aFile >> bal;
    return bal;
}

void OpenTheFile(ifstream & aFile){
     // do
     //    get a file name
     //    open the file
     // while the file is not open.
     aFile.open("finance.dep");
}