package com.company;

import sun.rmi.server.InactiveGroupException;

import java.awt.*;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class Main {

    static class AvgCalculator {

        public double calculateAvg(List<Integer> grades) {
            List<Integer> copy = removeExtrems(grades);
            return internalCalculateAvg(copy);
        }

        private List<Integer> removeExtrems(List<Integer> grades) {
            List<Integer> copy = new ArrayList<>(grades);
            if(grades.size() > 3) {
                final Integer max = Collections.max(copy);
                final Integer min = Collections.min(copy);

                copy.remove(max);
                copy.remove(min);
            }
            return copy;
        }

        private double internalCalculateAvg(List<Integer> grades) {
            double sum = 0;
            for (Integer grade : grades) {
                sum += grade;
            }
            return sum / grades.size();
        }

    }

    static class Book {

        private String title;
        private int year;

        public Book(String title, int year) {
            this.title = title;
            this.year = year;
        }

        public int getYear() {
            return year;
        }

        @Override
        public String toString() {
            return "Book{" +
                    "title='" + title + '\'' +
                    ", year=" + year +
                    '}';
        }
    }

    static class Library {

        private final List<Book> books;

        public Library(List<Book> books) {
            this.books = books;
        }

        public List<Book> filterByMinYear(int year) {
            final List<Book> result = new ArrayList<>();
            for (Book book : books) {
                if(book.getYear() > year) {
                    result.add(book);
                }
            }
            return result;
        }
    }

    public static void main(String[] args) {
        final Book a = new Book("a", 1998);
        final Book b = new Book("b", 2001);

        final Library library = new Library(Arrays.asList(a, b));

        System.out.println(library.filterByMinYear(1990));

    }
}