// Name: msglm
// Date: 4/29/2022
// Title: Payroll Calculator
// Description: Takes input data from file deliminated by a space. This information is then used to calculate taxes, net, and gross pay for each person in the entry.

#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>

using namespace std;

// Named constants
int ARRAY_SIZE = 10;
double FED_TAX=0.09;
double STATE_TAX=0.05;
double FICA_TAX=0.062;


// Function prototype
double GrossPay(double x, double y);
double Tax(double x);

// Main function--------------------------------------------------------------
int main()
{
	// Declare Varibles
	string lName[ARRAY_SIZE];
	string fName[ARRAY_SIZE];
	string fullName;
	double payrate[ARRAY_SIZE];
	double hours[ARRAY_SIZE];
	double grossPay[ARRAY_SIZE];
	double netPay[ARRAY_SIZE];
	double taxesOwed[ARRAY_SIZE];
        double totalGrossPay;
        double totalTaxes;
        double totalNetPay;

	// Declare variables for files
	ifstream inputFile;
	ofstream outputFile;

	// Open files
	inputFile.open("hourlyinput.txt");
	outputFile.open("hourlyoutput.txt");




	// Print grogram title and description
	cout << "Title: Payroll Calculator" << endl << "Description: Takes input data from file deliminated by a space. This information is then used to calculate taxes, net, and gross pay for each person in the entry." << endl;


	// check to make sure input file opened
	if (inputFile) {
		cout << "Successfully opened file";
	} else {
		cout << "ERROR! File failed to open!";
			return 1;
	}

	// Collect data from the file (Parallel Arrays)

	for (int i = 0; i < ARRAY_SIZE; i++) {
		inputFile >> fName[i] >> lName[i] >> payrate[i] >> hours[i];


	// Calculate Gross pay for all employees and store in arrays
		grossPay[i] = GrossPay(hours[i], payrate[i]);


	// Calculate taxes for all employees and store in arrays
	
		taxesOwed[i] = Tax(grossPay[i]);
	
	

	// Calculate net pay for each employee and store in arrays
	
		netPay[i] = grossPay[i] - taxesOwed[i];
	}

	// Printing payroll report to an OUTPUT FILE
	
	outputFile << fixed << left << showpoint << setprecision(2);
	outputFile << setw(17) << "Name" << setw(13) << "Payrate" << setw(9) << "Hours" << setw(9) << "Gross" << setw(9) << "Taxes" << setw(9) << "Net" << endl;
	for (int i = 0; i < ARRAY_SIZE; i++) {
	fullName = fName[i] + " " + lName[i]; 
	outputFile << setw(17) << fullName << setw(13) << payrate[i] << setw(9) << hours[i] << setw(9) << grossPay[i] << setw(9) << taxesOwed[i] << setw(9) << netPay[i] << endl;
	}
	
	cout << "Outputted to file.";

	// Print payroll statistics to the SCREEN
	
	for (int i = 0; i < ARRAY_SIZE; i++)
            {
                totalGrossPay = totalGrossPay + grossPay[i];
                totalTaxes = totalTaxes + taxesOwed[i];
                totalNetPay = totalNetPay + netPay[i];
            }
	cout << "Weekly Payroll Statistics:\n\n" ;
	cout << "Total Gross Pay: " << totalGrossPay << endl;
	cout << "Total Taxes: " << totalTaxes << endl; 
	cout << "Total Net Pay: " << totalNetPay << endl;



	// Close files
	outputFile.close();
	inputFile.close();


	return 0;
}

// Function definations

double GrossPay(double payRateValue, double hours)
{

return payRateValue*hours;

}

double Tax(double grossPayValue)
{
	double FICAOwed = grossPayValue * FICA_TAX;
	double stateOwed = grossPayValue * STATE_TAX;
	double fedOwed = grossPayValue * FED_TAX;
	double totalTax = FICAOwed + stateOwed + fedOwed;
	return totalTax;
}