import java.io.*;
public class Employee
{
	//class members declared to store values
	private static String EmpName; //to store name
	private static double hourlyRate; // to store hourly rate
	private static double hoursWorked; // to store hours worked
	private static String ErrMessage; //this is used to display error message

	//its not used right now, just declared
	public Employee(String EName,double hRate,double hWorked)
	{
		EmpName = EName;
		hourlyRate = hRate;
		hoursWorked = hWorked;
	}

	//Get Employee name
	public static String GetName()
	{
		return EmpName;
	}

	//Set Employee name
	public static void SetName(String EName)
	{
		EmpName = EName;
	}

	//Get Hourly Rate
	public static double GetHourlyRate()
	{
		return hourlyRate;
	}

	//Set Hourly Rate
	public static void SetHourlyRate(double hRate)
	{
		hourlyRate = hRate;
	}

	//Get Hours Worked
	public static double GethoursWorked()
	{
		return hoursWorked;
	}

	//Set Hours Worked
	public static void SethoursWorked(double hWorked)
	{
		hoursWorked = hWorked;
	}

	//Method to Calculate weekly payroll which returns double
	public static double CalculatePayRoll()
	{		
		return (GetHourlyRate() * GethoursWorked());
	}

	//This is a Method which accepts message and displays on screen to read input from console
	public static String GetUserInput(String Message)
	{
		//Class which reads input from console
		BufferedReader console = new BufferedReader(new InputStreamReader(System.in));
		System.out.print(Message); //Displaying the message to console
		try
		{
			return console.readLine(); //returning the value entered on the screen
		}
		catch (Exception e) // handling exceptions if any..
		{
			e.printStackTrace();
			return "";
		}
	}


	//Method to validate input depending on hourly rate, hours worked and loops until valid value is entered.
	public static String GetValidateInput(String userInputPromtMessage, String validationName)
	{
		boolean isValid = false;
		String userInput = "";
		try
	    {
			do //loop until valid value is entered
			{
				userInput = GetUserInput(userInputPromtMessage); // prompting input from console
				//if it is hourly rate we should check with negative numbers and any characters
				if (validationName.equals("HourlyRate")){
					isValid = Employee.isValidDouble(userInput,"Hourly Rate"); //function which validates whether it is valid input or not
				}
				//if it is hours worked we should check with negative numbers and any characters
				if (validationName.equals("HoursWorked")){
					isValid = Employee.isValidDouble(userInput,"Hours Worked");
				}
				
				if (!isValid) 
					System.out.println(ErrMessage); // if its invalid outputs the message and prompts another time
			} while (!isValid);

			return userInput;
	    }
	    catch (Exception e) //handling exceptions if any..
	    {
	        e.printStackTrace();
			return "";
	    }
	}

	//This method is used to validate Employee name whether it is "stop" or not (which is used to control the flow)
	public static boolean ValidateEmpName()
	{
		if (EmpName.equalsIgnoreCase("stop"))
			return false;
		else
			return true;
	}

	//Method validating whether the value entered is double or not
	public static boolean isValidDouble(String Val,String Msg)
	{
		try
		{
			double validNum = Double.parseDouble(Val); //converting the value to double 
			if (validNum < 0) //if less than zero will return false which prompts user to enter again
			{
				ErrMessage = Msg + " Should Not be Negative";
				return false;
			}
			else
				return true;
		}
		catch (Exception e)
		{
			ErrMessage = "Invalid Input, should be numbers"; // if the value entered is any invalid (alphabet or alpha numberic) returns false
			return false;
		}
	}

	//Outputs message to screen
	public static void DisplayOutput()
	{
		System.out.println("\n\nEmployee Name..............:" + GetName());
		System.out.println("Hourly Rate................:" + GetHourlyRate());
		System.out.println("Hours Worked...............:" + GethoursWorked());
		System.out.println("Weekly Payroll.............:" + CalculatePayRoll());
	}
	

}