package com.rubenvandeven.emotionhero;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Date;

/**
 * Created by ruben on 19/08/16.
 */

public class Highscores extends ArrayList<Highscore>{


    public static Highscores fromJson(String json) {
        Gson gson = new Gson();
        return gson.fromJson(json, Highscores.class);
    }

    public String toJson() {
        Gson gson = new Gson();
        return gson.toJson(this);
    }

    /**
     * Check if given highscore is highest score in this set.
     * @param score
     * @return
     */
    public boolean isHighest(Highscore score) {
        for(Highscore s: this) {
            if(s == score) // to allow comparison of items that are already in the set
                continue; // skip if it wants to compare with self.

            if(s.score > score.score) {
                return false;
            }
        }
        return true;
    }

    /**
     * Get the n highest scores
     */
    public Highscores getTopN(int n) {
        Collections.sort(this, new Comparator<Highscore>() {
            @Override
            public int compare(Highscore score1, Highscore score2)
            {
                // return highest first
                return score1.score > score2.score ? -1 : score1.score == score2.score ? 0 : 1;
            }
        });

        Highscores scores = new Highscores();
        for (int i = 0; i < n; i++) {
            scores.add(this.get(i));
        }
        return scores;
    }

    /**
     * Get the n highest scores
     */
    public Highscores getLast(Integer n) {
        Collections.sort(this, new Comparator<Highscore>() {
            @Override
            public int compare(Highscore score1, Highscore score2)
            {
                // return newest first
                return score1.time.before(score2.time) ? -1 : score1.time == score2.time ? 0 : 1;
            }
        });

        if(n == null) { // no limit
            return this;
        }

        Highscores scores = new Highscores();
        for (int i = 0; i < n; i++) {
            scores.add(this.get(i));
        }
        return scores;
    }


}