public class EmployeeService {

	public static List<Employee> getEmployees() {
		ArrayList<Employee> employeesArrList = new ArrayList<Employee>();

		employeesArrList.add(new Employee(7921, "Turner", 5000.0, "Male"));
		employeesArrList.add(new Employee(7802, "Blake", 4000.0, "Male"));
		employeesArrList.add(new Employee(7167, "Mark", 8000.0, "Male"));
		employeesArrList.add(new Employee(7177, "Alice", 5000.0, "Female"));
		employeesArrList.add(new Employee(7788, "Scott", 6000.0, "Male"));
		employeesArrList.add(new Employee(7044, "Sophia", 7000.0, "Female"));
		employeesArrList.add(new Employee(7289, "Allen", 3000.0, "Male"));
		employeesArrList.add(new Employee(7511, "Mary", 4000.0, "Female"));
		
		return employeesArrList;
	}
	
	// fetch "Female" employees
	public List<Employee> fetchFemaleEmployees() {
		
		List<Employee> employees = EmployeeService.getEmployees();
		
		/*
		Stream<Employee>  stream1 = employees.stream();
		Stream<Employee>  stream2 = stream1.filter( e -> e.getGender().equalsIgnoreCase("Female"));
		List<Employee> femaleEmployees = stream2.toList();		
		return femaleEmployees;
		*/
		
		return employees
			   .stream()
			   .filter( e -> e.getGender().equalsIgnoreCase("Female") )
			   .toList();
	}
	
	// add 10% hike for "Male" employees.
	public List<Employee> employeesAfterHike() {
		List<Employee>  employees = EmployeeService.getEmployees();
		
		/*
		Stream<Employee> stream1 = employees.stream();
		
		Stream<Employee> stream2 = stream1.filter(e -> e.getGender().equalsIgnoreCase("Male"));
		
		Stream<Employee> stream3 = stream2.map( e -> {
			                                           e.setSalary(e.getSalary() * 1.1);
			                                           return e;
		                                             });
		
		List<Employee> maleEmployees = stream3.collect(Collectors.toList());
		return maleEmployees;
		*/
		
		return employees
			   .stream()
			   .filter(e -> e.getGender().equalsIgnoreCase("Male"))
			   .map(e -> { e.setSalary(e.getSalary() * 1.1); return e; })
			   .collect(Collectors.toList());
				
	}
	
	// fetch top paid employee
	public Employee topPaidEmployee() {
		List<Employee>  employees = EmployeeService.getEmployees();
		return employees
				.stream()
				.max((e1, e2) -> {
					if (e1.getSalary() < e2.getSalary())
						return -1;
					else if(e1.getSalary() == e2.getSalary())
						return 0;
					else 
						return 1;
				})
				.get();
			
	}
	
	// fetch top3 paid employees
	public List<Employee> top3PaidEmployees() {
		
		List<Employee>  employees = EmployeeService.getEmployees();
		
		return employees
				.stream()
				.sorted((e1, e2) -> {
					if(e1.getSalary() < e2.getSalary())
						return 1;
					else if(e1.getSalary() == e2.getSalary())
						return 0;
					else 
						return -1;
				})
				.limit(3)
				.toList();
		
	}
	
	

}