import java.util.*;
import java.lang.*;
/**
 * Created by leon on 2/9/18.
 */
public class Console {

    public static void print(String output, Object... args) {
        System.out.printf(output, args);
    }

    public static void println(String output, Object... args) {
        print(output + "\n", args);
    }
    
    public static String getStringInput(String prompt) {
        Scanner scanner = new Scanner(System.in);
        println(prompt);
        String userInput = scanner.nextLine();
        return userInput;
    }

    public static Integer  getIntInput(String prompt) {
        Scanner scanner = new Scanner(System.in);
        println(prompt);
        int userInput = scanner.nextInt();
        return userInput;
    }

    public static Double getDoubleInput(String prompt) {
        Scanner scanner = new Scanner(System.in);
        println(prompt);
        double userInput = scanner.nextDouble();
        return userInput;
    }

    public static String display(){
        //ALWAYS DISPLAY WHATS IN YOUR CALCULATOR ( STRINGBUILDER )
            return null;
            //return display;
    }
    
    public static void clear(){
        //CLEARS SCREEN / SET TO ZERO ??
    }
    
    public static double getInput(String numberString){
        //GETS INPUT FROM PERSON ( X )
            //String numberString = getStringInput("Please choose a number.");
            quit(numberString);
        try{
            double number1 = Double.parseDouble(numberString);
            //System.out.println(number1);
            return number1;
        }catch(Exception e){
            return getInput(numberString);
        }
    }
    /*
    public static double invert(double number){
        //TURNS NEGATIVE TO POSITIVE OR POSITIVE TO NEGATIVE
        try{
            double invertedNumber = -number;
            System.out.println(invertedNumber);
            return invertedNumber;
        } catch(Exception e){
            return getInput();
        }
    }
    */
    public static double getNumber(String numberString){
        //GETS INPUT FROM PERSON ( Y )
            //System.out.println(first + " " + op);
            //String numberString = getStringInput("Please choose a number.");
            quit(numberString);
        try{
            double number2 = Double.parseDouble(numberString);
            //System.out.println(number2);
            return number2;
        }catch(Exception e){
            return getNumber(numberString);
        }
    }
    
    public static String getOp(){
        //GET OPERATION FROM PERSON
            System.out.println("Current Number: " + simpleOp.currentNumber);
            String operation = getStringInput("Please choose your operation.");
            if (operation == null) {
                System.out.println("You have not provided valid input. Please enter \"?\" for a list of commands.");
            }
            quit(operation);
            opSwitch.choose(operation);
            //return opSwitch.choose(operation1);
            return operation;
    }
    
    public static void quit(String answer){
        if(answer.equals("quit") || answer.equals("exit")){
            System.exit(0);
        } else if(answer.equals("clear")) {
            System.out.print('\f');
        } else if(answer.equals("reset")){
            simpleOp.currentNumber = 0;
            System.out.println(simpleOp.currentNumber);
        }
    }
   
}