import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        Employee e1 = new Employee(1, "Alice", "alice@example.com", 5000);
        Employee e2 = new Employee(2, "Bob", "bob@example.com", 7000);
        Employee e3 = new Employee(3, "Carol", "carol@example.com", 3000);

        System.out.println("e1 email valid: " + e1.validateEmail());
        System.out.println("e1 salary valid: " + e1.validateSalary());

        EmailService emailService = new EmailService();
        emailService.sendHireEmail(e1);
        emailService.sendSalaryAdjustmentEmail(e2);
        emailService.sendTerminationEmail(e3);

        List<Employee> employees = Arrays.asList(e1, e2, e3);
        EmployeeSearch search = new EmployeeSearch();
        List<Employee> filtered = search.findBySalaryRange(employees, 4000, 8000);
        System.out.println("Employees with salary 4000-8000: " + filtered.size());

        EmployeeStatistics stats = new EmployeeStatistics();
        System.out.println("Age distribution: " + stats.getAgeDistribution());
        System.out.println("Salary distribution by dept: " + stats.getSalaryDistributionByDept());
    }
}