package com.company;

import java.util.ArrayList;
import java.util.Collections;

public class Library implements Comparable {

    private int index;
    private int booksPerDay;

    public int getBooksPerDay() {
        return booksPerDay;
    }

    public int getSignUpLength() {
        return signUpLength;
    }

    private int signUpLength;
    private ArrayList<Book> books = new ArrayList<>();
    private ArrayList<Book> selectedBooks = new ArrayList<>();

    public Library(int index, int booksPerDay, int signUpLength, int[] booksIds) {
        this.index = index;
        this.booksPerDay = booksPerDay;
        this.signUpLength = signUpLength;
        for (int bookID : booksIds) {
            addBook(new Book(bookID, Main.BOOK_SCORES[bookID]));
        }
        Collections.sort(books);
    }

    public void addBook(Book book) {
        books.add(book);
    }

    public void addSelectedBook(Book book) { selectedBooks.add(book); }

    public ArrayList<Book> getBooks() {
        return books;
    }

    public void deleteBook(int index) { books.remove(index); }

    public int getIndex() {
        return index;
    }

    public ArrayList<Book> getSelectedBooks() {
        return selectedBooks;
    }

    public int getNumSelectedBooks() {
        return selectedBooks.size();
    }

    public long getTotalScore(){
        long score = 0;
        long maxScore = 0;
        for (Book book : books) {
            if (book.getScore() > maxScore){
                maxScore = book.getScore();
            }
        }
        System.out.println(maxScore);
        for (Book book : books) {
            double newScore = maxScore / (1 + Math.exp(-1 * book.getScore()));
            System.out.println(book.getScore() + " : " + newScore + " : " + maxScore);
            score += newScore;
        }
        return score;
    }

    public long getAverageScore() {
        int size = books.size();
        return getTotalScore() / size;
    }

    public long getAverageScorePerDay() {
        return (getAverageScore() / (Main.MAX_TIME - signUpLength)) * booksPerDay;
        //return (getAverageScore() * (Main.MAX_TIME - signUpLength));
    }

    @Override
    public int compareTo(Object o) {
        Library other = (Library) o;
        if (this.getAverageScorePerDay() == other.getAverageScorePerDay()) return 0;
        return this.getAverageScorePerDay() > other.getAverageScorePerDay() ? 1 : -1;
    }
}