import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;
import javax.sound.sampled.LineListener;
import java.io.BufferedReader;
import java.io.File;

public class HighscoreList {
	public static void main(String[] args) {
		System.out.println("Welcome to the highscore list program");
		boolean finished = false;
		Scanner input = new Scanner(System.in);
		ArrayList<HighscoreItem> list = new ArrayList<HighscoreItem>();
		HighscoreItem item = new HighscoreItem("null", 0);

		while (!finished) {
			System.out.println("---HighScore menu---\n"//Skriver ut menyn
					+ "1. Insert new item\n" + "2. Print list\n"
					+ "3. Reset list\n"
					+ "4. Quit\n"
					+ "Please make your choice and press enter: ");

			switch (input.nextInt()) {
			case 1:
				System.out.print("Please enter name: ");
				String name = input.next();
				System.out.print("Please enter score: ");
				int score = input.nextInt();
				list.add(new HighscoreItem(name, score));
				save(list, "list.txt");
				break;
			case 2:
				print(list, item);
				break;
			case 3:
				name = "unknown";
				score = 0;
				for (int i = 0; i < 5; i++){
					list.add(new HighscoreItem(name, score));
				}
				save(list, "list.txt");
				System.out.println("The highscore list has been reset.");
				break;

			}
		}
	}

	public static void save(ArrayList<HighscoreItem> list, String filename) {

		try {
			File saveFile = new File("list.txt");
			FileOutputStream file = new FileOutputStream(saveFile);
			ObjectOutputStream out = new ObjectOutputStream(file);
			if (!saveFile.exists()) {// om filen inte finns så skapas filen
				saveFile.createNewFile();
			}

			list = sort(list);
			for (HighscoreItem item : list) {
				out.writeObject(item);
			}

			out.writeObject(null);
			out.close();

		} catch (Exception e) {
			System.out.println("Fel med save");
		}
	}

	public static void print(ArrayList<HighscoreItem> list, HighscoreItem item) {

		System.out.println("---The highscore list---");
		ArrayList<HighscoreItem> loaded = load("list.txt");
		list = list.subList(0, 5);
		for (int i = 0; i < loaded.size(); i++) {
			item = loaded.get(i);
			System.out.println((i + 1) + ".	" + item.getName() + "	" + item.getScore());
		}
	}

	public static ArrayList<HighscoreItem> sort(ArrayList<HighscoreItem> list) {
		Collections.sort(list);
		return list;
	}

	public static ArrayList<HighscoreItem> load(String filename) {

		ArrayList<HighscoreItem> list = new ArrayList<HighscoreItem>();
		try {
			FileInputStream file = new FileInputStream(filename);
			ObjectInputStream in = new ObjectInputStream(file);

			while (true) {
				Object o = in.readObject();
				if (o != null) {
					try {
						HighscoreItem item = (HighscoreItem) o;
						list.add(item);
					} catch (Exception e2) {
						System.out.println("Fel i läsningenn från filen");
					}
				} else {
					break;
				}
			}
			in.close();

		} catch (Exception e) {
			System.out.println("Fel med load");
		}
		return list;
	}
}

/*
 * try = markera start för ett block som kopplas mot felhantering catch = vad
 * som ska göras om fel hittas? throw = kasta exception finally = Exception
 * klass = getMessage(), getClass(), printStackTrace() Strömmar: System.in,
 * System.out, Scanner java.io.file = kan användas för att se om en fil finns
 *
 * Nästa föreläsning
 *
 *
 *
 */