//*******************************************************
// Author: D.S. Malik
// Program: Checking Account Balance
// This program calculates a customer's checking account
// balance at the end of the month.
//*******************************************************

import java.io.*;
import java.util.*;

public class Checking
{
    static final double MINIMUM_BALANCE = 1000.00;
    static final double SERVICE_CHARGE = 25.00;

    public static void main(String[] args)
                           throws FileNotFoundException, IOException
    {
          //Declare and initialize variables        //Step 1
        int    acctNumber;
        double beginningBalance;
        double accountBalance;

        double amountDeposited = 0.0;
        int    numberOfDeposits = 0;

        double amountWithdrawn = 0.0;
        int    numberOfWithdrawals = 0;

        double interestPaid = 0.0;

        char   transactionCode;
        double transactionAmount;

        boolean isServiceCharged = false;
		  String transactionPath = "D:\\program\\467343.txt";
		  String statementPath   = "D:\\program\\acc_statement.txt";
		  
		  FileReader traFile = new FileReader(transactionPath);
		  Scanner inFile = new Scanner(traFile);

        PrintWriter outFile = new PrintWriter(statementPath);

		  // Promopt the user what the program is doing 
		  System.out.println("Reading the transcation file: " + transactionPath);		  
        acctNumber = inFile.nextInt();                   //Step 2
        beginningBalance = inFile.nextDouble();          //Step 2

        accountBalance = beginningBalance;               //Step 3

        while (inFile.hasNext())                         //Step 4
        {
            transactionCode = inFile.next().charAt(0);   //Step 4a
            transactionAmount = inFile.nextDouble();     //Step 4b

            switch (transactionCode)
            {
            case 'D':                                    //Step 4c
            case 'd':
                accountBalance = accountBalance
                                 + transactionAmount;
                amountDeposited = amountDeposited
                                  + transactionAmount;
                numberOfDeposits++;
                break;

            case 'I':                                    //Step 4d
            case 'i':
                accountBalance = accountBalance
                                 + transactionAmount;
                interestPaid = interestPaid
                               + transactionAmount;
                break;

            case 'W':                                    //Step 4e
            case 'w':
                accountBalance = accountBalance
                                 - transactionAmount;
                amountWithdrawn = amountWithdrawn
                                  + transactionAmount;
                numberOfWithdrawals++;

                if ((accountBalance < MINIMUM_BALANCE)
                                   && (!isServiceCharged))
                {
                     accountBalance = accountBalance
                                     - SERVICE_CHARGE;
                     isServiceCharged = true;
                }
                break;

            default:
                System.out.println("Invalid transaction code: "
                                   + transactionCode + " "
                                   + transactionAmount); //Step 4f
            }//end switch

        }//end while

        //Output results    //Step 5
		  
		  // The header
    	  outFile.println(" ******************************** ");
		  outFile.println(" *****  COMP Bank Statement ***** ");
		  outFile.println(" ******************************** ");
	

		
	     outFile.printf("Account Number: %d%n", acctNumber);
        outFile.printf("Beginning Balance: $%.2f %n",
                        beginningBalance);
        outFile.printf("Ending Balance: $%.2f %n",
                        accountBalance);
        outFile.println();
        outFile.printf("Interest Paid: $%.2f %n",
                        interestPaid);
        outFile.println();
        outFile.printf("Amount Deposited: $%.2f %n",
                        amountDeposited);
        outFile.printf("Number of Deposits: %d%n",
                        numberOfDeposits);
        outFile.println();
        outFile.printf("Amount Withdrawn: $%.2f %n",
                        amountWithdrawn);
        outFile.printf("Number of Withdrawals: %d%n",
                        numberOfWithdrawals);
        outFile.println();

        if (isServiceCharged)
            outFile.printf("Service Charge: $%.2f %n",
                            SERVICE_CHARGE);

        // The footer 
		  outFile.println(" ******  End of Statement ********* ");
		  inFile.close();
        outFile.close();
		  
		  // Promopt the user that the program is done 
		  System.out.println("Done. The statement is at: " + statementPath);		  
		  
    }
}