package april20;

import java.util.*;

public class Bank {

	public static HashMap<String, String> accountCredentials = new HashMap<String, String>();
	public static HashMap<String, Integer> accountBalance = new HashMap<String, Integer>();

	Bank() {

		accountCredentials.put("1234567890", "1234");
		accountBalance.put("1234567890", 13435);

		accountCredentials.put("0987654321", "0987");
		accountBalance.put("0987654321", 100);

		accountCredentials.put("1029384756", "3423");
		accountBalance.put("1029384756", 29);

		accountCredentials.put("9087653421", "9348");
		accountBalance.put("9087653421", 12345678);
	}

	public String login(Scanner sc) {

		boolean loggedIn = false;

		do {

			System.out.println("Enter your account number: ");
			String acno = sc.next();

			boolean correct = true;

			do {

				if (acno.length() != 8) {

					correct = false;

					System.out.println("Account number should be 14 digit long!");
					System.out.println("Try again");
					System.out.println("Enter your account number: ");
					acno = sc.next();
				}
				
			} while (!correct);

			System.out.println("Enter your PIN: ");
			String pass = sc.next();

			do {

				if (pass.length() != 4) {

					System.out.println("Your PIN should be 4 digit long");
					System.out.println("Try again");
					System.out.println("Enter your PIN: ");
					pass = sc.next();

				}

			} while (pass.length() != 4);

			if (accountCredentials.containsKey(acno) && accountCredentials.get(acno).equals(pass)) {

				System.out.println("loggedIn successful");
				loggedIn = false;
				return acno;

			} else {

				System.out.println("Incorrect account number or PIN");
				System.out.println("Try again");
			}


		} while (!loggedIn);

		return null;
	}
	
	public void addFunds(Scanner sc, String accNo) {
		
		System.out.println("Enter the amount you want to deposit: ");
		int amount = sc.nextInt();
		
		if (amount >= 0) {
			accountBalance.put(accNo, accountBalance.get(accNo) + amount);		
			System.out.println("Deposit successful");
			System.out.println("Your new balance is: " + accountBalance.get(accNo));
		}
	}

	public void withdrawFunds(Scanner sc, String accNo) {

		System.out.println("Enter the amount you want to withdraw: ");
		int amount = sc.nextInt();

		if(accountBalance.get(accNo) >= amount) {
			accountBalance.put(accNo, accountBalance.get(accNo) - amount);
			System.out.println("Withdrawal successful");
			System.out.println("Your new balance is: " + accountBalance.get(accNo));
		} else {
			System.out.println("Insufficient balance");
		}
	}
	
	public void checkBalance(Scanner sc,String accNo) {

		System.out.println("Your current balance is: " + accountBalance.get(accNo));
	}

	public void changePin(Scanner sc, String accNo) {

		System.out.println("Enter your current PIN: ");
		String pass = sc.next();

		System.out.println("Enter new password: ");
		String newpass = sc.next();

		accountCredentials.put(pass, newpass);
		System.out.println("Password updated successfully :)");
	}


}