package org.Exceptions;

import java.util.regex.Pattern;

public class RuntimeExceptionDemo {
    public static void main(String[] args) {

        UserEntity user = new UserEntity("Ali", "Ahmadi", 1234567890L,
                null, 989111111111L, null);

        validateEmail(user);
        calculatePayment(5000, 0);
        convertUserAge("twenty");
        completeRegistration(user);

    }


    //nullPointerException
    //IllegalArgumentException
    public static void validateEmail(UserEntity user) {

        String email = user.getEmail();

        String emailRegex = "^[A-Za-z0-9+_.-]+@[A-Za-z0-9.-]+$";

        if (!Pattern.matches(emailRegex, email)) {
            throw new IllegalArgumentException("Invalid email format");
        }

        System.out.println("User email is valid");
    }

    // ArithmeticException
    public static void calculatePayment(int totalAmount, int installmentCount) {

        int payment = totalAmount / installmentCount;

        System.out.println("Each installment : " + payment);
    }

    // NumberFormatException
    public static void convertUserAge(String ageInput) {

        int age = Integer.parseInt(ageInput);

        System.out.println("User age: " + age);
    }

//    IllegalStateException
    public static void completeRegistration(UserEntity user) {

        if (user.getDateOfBirth() == null) {
            throw new IllegalStateException(
                    "Registration cannot be completed. Date of birth is missing."
            );
        }

        System.out.println("Registration completed");
    }

}