/**
 * Copyright (C) 2018 Christian Pierre MOMON <cmomon@april.org>
 *
 * This file is part of (April) Hebdobot.
 *
 * Hebdobot is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Hebdobot is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with Hebdobot.  If not, see <http://www.gnu.org/licenses/>
 */
package org.april.hebdobot.model.stats;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import fr.devinsy.strings.StringList;

/**
 * The Class Integers.
 */
public class SimpleIntegerBoard implements Iterable<Integer>
{
    private Set<Integer> integers;
    private boolean isUptodate;
    private List<Integer> board;

    /**
     * Instantiates a new distribution.
     */
    public SimpleIntegerBoard()
    {
        this.integers = new HashSet<>(30);
        this.isUptodate = false;
        this.board = new ArrayList<>(30);
    }

    /**
     * Adds the.
     *
     * @param value
     *            the value
     * @return true, if successful
     */
    public boolean add(final Integer value)
    {
        boolean result;

        if (value == null)
        {
            result = false;
        }
        else
        {
            result = this.integers.add(value);
        }

        //
        return result;
    }

    /**
     * Gets the position of the board entry.
     *
     * @param search
     *            the search
     * @return the position of
     */
    public Integer getPositionOf(final int search)
    {
        Integer result;

        update();

        int index = 0;
        boolean ended = false;
        result = null;
        while (!ended)
        {
            if (index < this.board.size())
            {
                int value = this.board.get(index);

                if (value == search)
                {
                    result = index + 1;
                    ended = true;
                }
                else
                {
                    index += 1;
                }
            }
            else
            {
                ended = true;
                result = null;
            }
        }

        //
        return result;
    }

    /**
     * Iterator.
     *
     * @return the iterator
     */
    @Override
    public Iterator<Integer> iterator()
    {
        Iterator<Integer> result;

        update();
        result = this.board.iterator();

        //
        return result;
    }

    @Override
    public String toString()
    {
        String result;

        update();

        StringList buffer = new StringList();
        for (Integer value : this.board)
        {
            buffer.append(value);
        }
        result = buffer.toStringWithBracket();

        //
        return result;
    }

    /**
     * Update.
     */
    public void update()
    {
        if (!this.isUptodate)
        {
            this.board.clear();
            for (Integer value : this.integers)
            {
                this.board.add(value);
            }
            Collections.sort(this.board);
            Collections.reverse(this.board);

            this.isUptodate = false;
        }
    }
}