/* This is a simple atm program that asks the user
	to enter a pin number, the pin number is set to 111
	then it will verifies if the pin matches
   if it does match, then the
	user get to choose, check account balance,
	deposite, withdraw, or exit. 
	The balance is set to 2000
	Overall the program demonstrate the use of
	loops, if-statements, getting user inputs
	and making decisions using the inputs
	
*
*/

import java.util.Scanner;

public class Atm
{
	public static void main(String[] args)
	{
		int n = 0;
		int totalamount = 2000;
		int pinnum;
		int depot, withdraw;
		String choices;
		
	
			Scanner key = new Scanner(System.in);
	
			// Here we ask the user for the pin number
	
			System.out.print("Please enter your pin number: ");
			pinnum = key.nextInt();
		
			/* If the user's input does not match, we will loop
				And ask the user to enter the pin again
				Maximum time we will loop is 3 times,
				If the loop more than 3 times the program will exit
				
			*
			*/
			
			while((pinnum!=111) && (n < 3))
			{
				System.out.print("Please enter your pin number: ");
				pinnum = key.nextInt();
				n++;
			
				if(n==3)
				{
					System.out.println("Sorry too many tries, program will exit");
					System.exit(0);
				}
			}
		
		/* Here we will use a do-while loop
			The loop keeps on looping unless the user 
			Enters e to exit
		*
		*/
		
		do
		{
			System.out.println("Enter what would you like to do\n");
			System.out.println("D--Deposite, W--Withdraw, C--Check Balance, E--Exit");
			System.out.print("Enter your selection now: ");
			
			/* Here we use .next() instead of.nexyLine(), because we're only
				retrieving a single charater
			*
			*/
			 
			choices = key.next();
			
			// Inside this if statement we calculates balance after withdrawing
		
			if(choices.equals("W") || choices.equals("w"))
			{
				System.out.println("You have selected with draw\n");
				System.out.print("Please enter the amount you want to with draw: \n");
				withdraw = key.nextInt();
				
				totalamount -= withdraw;
				
			}
			
			// Inside this else-if statement we checks the user's balance
			
			else if(choices.equals("C") || choices.equals("c"))
			{
				System.out.println("You have selected check balance\n");
				System.out.print("Your account balance is " + totalamount + "\n" );
				
			}
			
			// Inside this else-if statement we calculates the balance after deposite
		
			else if(choices.equals("d") || choices.equals("D"))
			{
				System.out.println("You have selected deposite\n");
				System.out.print("Please enter the amount you want to deposite: ");
				depot = key.nextInt();
				
				totalamount += depot;	
				
			}
			
			// Inside this else-if statement we only have one statement, which will exit the program
			else if(choices.equals("E") || choices.equals("e"))
			{
				System.exit(0);
			}
		}while(true);

	
	}
}