import java.io.*;
 
public class PayrollApp {
 
	// Data Objects (
		private Employees empTable;
		private static final MyString REPORT_HEADER_A = new MyString("Employee                    Pay      Hours      Gross        Tax        Net");
		private static final MyString REPORT_HEADER_B = new MyString("Name                       Rate     Worked        Pay     Amount        Pay");
		private static final MyString REPORT_HEADER_C = new MyString("====================== ======== ========== ========== ========== ==========");
		private static final MyString WORD_TOTALS = new MyString("Totals:");
		private static final MyString WORD_AVERAGES = new MyString("Averages:");
//  )
	// Constructors (
		public PayrollApp() {
			empTable = new Employees();
		}
		public PayrollApp(HourlyEmployee e) {
			empTable = new Employees(e);
		}
		public PayrollApp(PiecedEmployee e) {
			empTable = new Employees(e);
		}
		public PayrollApp(SalariedEmployee e) {
			empTable = new Employees(e);
		}
		public PayrollApp(Employees e) {
			empTable = e;
		}
		public PayrollApp(File file) {
			empTable = new Employees(file);
		}
//  )
	// Accessors (
		public Employees getEmps() {
			return new Employees(empTable);
		}
//  )
	// Mutators (
		public MyString tableHeader() {
			return new MyString("  " + REPORT_HEADER_A + "\n  " + REPORT_HEADER_B + "\n  " + REPORT_HEADER_C);
		}
		public MyString[] tableRows() {
			MyString[] rows = new MyString[empTable.size()];
			for (int i=0; i<empTable.size(); i++) {
				HourlyEmployee e = (HourlyEmployee)empTable.employee(i);
				rows[i] = new MyString("  " + e.formattedName().left(22) + " " + e.payRate().myString(2).right(8) + " " + e.hours().myString(2).right(10) + " " + e.grossPay().myString(2).right(10) + " " + e.taxAmount().myString(2).right(10) + " " + e.netPay().myString(2).right(10));	
			}
			return rows;
		}
		public Number totalPayRate() {
			Number total = new Number();
			for (int i=0; i<empTable.size(); i++) {
				total = total .plus (((HourlyEmployee)empTable.employee(i)).payRate());
			}
			return total;
		}
		public Number totalHours() {
			Number total = new Number();
			for (int i=0; i<empTable.size(); i++) {
				total = total .plus (((HourlyEmployee)empTable.employee(i)).hours());
			}
			return total;
		}
		public Number totalGross() {
			Number total = new Number();
			for (int i=0; i<empTable.size(); i++) {
				total = total .plus (empTable.employee(i).grossPay());
			}
			return total;
		}
		public Number totalTax() {
			Number total = new Number();
			for (int i=0; i<empTable.size(); i++) {
				total = total .plus (empTable.employee(i).taxAmount());
			}
			return total;
		}
		public Number totalNet() {
			Number total = new Number();
			for (int i=0; i<empTable.size(); i++) {
				total = total .plus (empTable.employee(i).netPay());
			}
			return total;
		}
		public Number avgPayRate() {
			return totalPayRate() .over (empTable.size());
		}
		public Number avgHours() {
			return totalHours() .over (empTable.size());
		}
		public Number avgGross() {
			return totalGross() .over (empTable.size());
		}
		public Number avgTax() {
			return totalTax() .over (empTable.size());
		}
		public Number avgNet() {
			return totalNet() .over (empTable.size());
		}
		public MyString totalsRow() {
			return new MyString("  " + WORD_TOTALS.left(22) + " " + totalPayRate().myString(2).right(8) + " " + totalHours().myString(2).right(10) + " " + totalGross().myString(2).right(10) + " " + totalTax().myString(2).right(10) + " " + totalNet().myString(2).right(10));	
		}
		public MyString averagesRow() {
			return new MyString("  " + WORD_AVERAGES.left(22) + " " + avgPayRate().myString(2).right(8) + " " + avgHours().myString(2).right(10) + " " + avgGross().myString(2).right(10) + " " + avgTax().myString(2).right(10) + " " + avgNet().myString(2).right(10));	
		}
//  )
}