package Online_Code_Samples.Week2;

import java.util.*;

public class GetStudentGroup {

public static Map<Integer, List<Student>> groupStudent(List<Student> students){

Map<Integer, List<Student>> groupedStudents = new HashMap<>();

List<Student> studentAbove70 = new ArrayList<>();

List<Student> cStudents = new ArrayList<>();

List<Student> backBenchers = new ArrayList<>();

for(Student st: students){

switch (st.getScore()) {

case 70 -> studentAbove70.add(st);

case 50 -> cStudents.add(st);

default -> backBenchers.add(st);

}

}

groupedStudents.put(70, studentAbove70);

groupedStudents.put(50, cStudents);

groupedStudents.put(40, backBenchers);

return groupedStudents;

}

public static void main(String[] args) {

Student first = new Student("John", 25, 70);

Student fifth = new Student("John", 25, 35);

Student second = new Student("Jane", 27, 70);

Student third = new Student("David", 35, 50);

Student fourth = new Student("Joy", 30, 45);

List<Student> student = new ArrayList<>();

student.add(first);

student.add(second);

student.add(third);

student.add(fourth);

student.add(fifth);

//Used to test for a condition: returns true or false;

// Predicate<Student> predicate = (stud) -> stud.getAge() < 30;

// student.stream().filter(predicate).forEach(System.out::println);

Comparator<Student> nameComparator = (s, s2) -> s.getName().compareTo(s2.getName());

Comparator<Student> scoreComparator = (s, s1 ) -> s.getScore() - s1.getScore();

Comparator<Student> ageComparator = (s, s1 ) -> s.getAge() - s1.getAge();

student.stream().sorted(ageComparator).forEach(System.out::println);

// Map<Integer, List<Student>> result = groupStudent(student);

//

// for( Integer key: result.keySet() ){

// System.out.println("Key is " + key);

// List<Student> list = result.get(key);

// for( Student st: list ){

// System.out.println(st);

// }

// }

}

}