package dev.kske.minesweeper;

import static dev.kske.minesweeper.BoardConfig.*;

import java.io.*;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.swing.JOptionPane;

/**
 * Project: <strong>Minesweeper</strong><br>
 * File: <strong>ScoreManager.java</strong><br>
 * Created: <strong>15.05.2019</strong><br>
 * Author: <strong>Kai S. K. Engelbart</strong>
 */
public class ScoreManager {

	private List<Score> easy, medium, hard;
	private final String scoresFile = "scores.ser";

	public ScoreManager() {
		easy = new ArrayList<>();
		medium = new ArrayList<>();
		hard = new ArrayList<>();
	}

	public void addScore(GameOverEvent evt) {
		// Determine board config
		BoardConfig config = evt.getBoardConfig();
		if (config == EASY && (easy.size() < 10 || easy.get(9).getDuration() > evt.getDuration())) {
			String name = JOptionPane.showInputDialog("Please enter your name");
			Score score = new Score(name, evt.getDuration(), new Date());
			sortInsert(score, easy);
		} else
			if (
				config == MEDIUM
					&& (medium.size() < 10 || medium.get(9).getDuration() > evt.getDuration())
			) {
				String name = JOptionPane.showInputDialog("Please enter your name");
				Score score = new Score(name, evt.getDuration(), new Date());
				sortInsert(score, medium);
			} else
				if (
					config == HARD
						&& (hard.size() < 10 || hard.get(9).getDuration() > evt.getDuration())
				) {
					String name = JOptionPane.showInputDialog("Please enter your name");
					Score score = new Score(name, evt.getDuration(), new Date());
					sortInsert(score, hard);
				}
	}

	private void sortInsert(Score score, List<Score> list) {
		for (int i = 0; i < list.size(); i++)
			if (list.get(i).getDuration() > score.getDuration()) {
				list.add(i, score);
				return;
			}
		list.add(score);
	}

	public void displayEasy() {
		new ScoreDialog(easy, "Easy").setVisible(true);
	}

	public void displayMedium() {
		new ScoreDialog(medium, "Medium").setVisible(true);
	}

	public void displayHard() {
		new ScoreDialog(hard, "Hard").setVisible(true);
	}

	@SuppressWarnings("unchecked")
	public void loadScores() {
		try (var in = new ObjectInputStream(new FileInputStream(scoresFile))) {
			Object obj = in.readObject();
			if (obj instanceof ArrayList<?>)
				easy = (ArrayList<Score>) obj;
			obj = in.readObject();
			if (obj instanceof ArrayList<?>)
				medium = (ArrayList<Score>) obj;
			obj = in.readObject();
			if (obj instanceof ArrayList<?>)
				hard = (ArrayList<Score>) obj;
			else
				throw new IOException("Serialized object has the wrong class.");
		} catch (FileNotFoundException ex) {} catch (IOException | ClassNotFoundException ex) {
			JOptionPane.showMessageDialog(
				null,
				"The score file seems to be corrupted. It will be replaced when closing the game.",
				"File error",
				JOptionPane.ERROR_MESSAGE
			);
		}
	}

	public void saveScores() {
		try (var out = new ObjectOutputStream(new FileOutputStream(scoresFile))) {
			out.writeObject(easy);
			out.writeObject(medium);
			out.writeObject(hard);
		} catch (IOException ex) {
			ex.printStackTrace();
		}
	}
}