import java.util.Scanner;

public class TempConverter {

	public static void main(String[] args) {
		boolean running  = true;

		while(running) {

			Scanner sc = new Scanner(System.in);
			boolean understands = false;

			// My menu
			System.out.println("Temperature Converter");
			System.out.println("====================================");
			System.out.println("");
			System.out.println("\t1) Fahrenheit to Celsius");
			System.out.println("\t2) Celsius to Fahrenheit");
			System.out.println("");
			System.out.println("====================================");

			// The user's choice
			int input = sc.nextInt();
			String buff = sc.nextLine();

			// If the user wants to convert F to C
			if(input == 1) {
				System.out.print("Please enter your temperature in Fahrenheit: ");
				double tempInF = sc.nextDouble();
				String buffer = sc.nextLine();

				tempInF = (tempInF - 32) * 5/9.0;
				System.out.println("Your temperature in Celsius: " + tempInF);

				// It just looks better with this
				try {
					Thread.sleep(1200);
				} catch(InterruptedException e) {
					e.getStackTrace();
				}
			}

			// If the user wants to convert from C to F
			if(input == 2) {
				System.out.print("Please enter your temperature in Celsius: ");
				double tempInC = sc.nextDouble();
				String buffer = sc.nextLine();

				tempInC = (tempInC * 9.0/5) + 32;
				System.out.println("Your temperature in Fahrenheit: " + tempInC);

				// Again, it just looks better
				try {
					Thread.sleep(1200);
				} catch(InterruptedException e) {
					e.getStackTrace();
				}
			}

			// If the user tryna be cool and not enter in one of the options
			if(input != 1 && input != 2) {
				System.out.println("That is not an option! Please choose either option 1 or 2!");
			}

			// If the user puts in something nonsensical, then the computer will re-ask him or her
			while(!understands) {
				System.out.println("Do you want to input another temperature?");
				String yOrN = sc.nextLine();

				if(yOrN.equals("y") || yOrN.equals("yes") || yOrN.equals("Y") || yOrN.equals("YES") || yOrN.equals("Yes")) {
					System.out.println("");
					understands = true;
				}
				else if(yOrN.equals("n") || yOrN.equals("no") || yOrN.equals("N") || yOrN.equals("NO") || yOrN.equals("No")) {
					System.out.println("Program is closing. Thank you for using Temperature Calculator.");
					running = false;
					understands = true;

					sc.close();
				}
				else {
					System.out.println("Sorry, I didn't understand that.");
					System.out.println("Please type what you mean in a different way.");
				}
			}
		}
	}
}