/*
 * Copyright (C) 2008-2017, Juick
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.mitchellbosecke.pebble.extension.filters;

import com.juick.Message;
import com.mitchellbosecke.pebble.extension.Filter;

import java.util.List;
import java.util.Map;

public class FormatRepliesFilter implements Filter {
    @Override
    public Object apply(Object input, Map<String, Object> args) {
        if (input instanceof Message) {
            int replies = ((Message)input).getChildsCount();
            int ld = replies % 10;
            int lh = replies % 100;
            if ((lh < 10 || lh > 20) && ld == 1) {
                return replies + " ответ";
            } else if ((lh < 10 || lh > 20) && ld > 1 && ld < 5) {
                return replies + " ответа";
            } else {
                return replies + " ответов";
            }
        }
        throw new IllegalArgumentException("invalid input");
    }

    @Override
    public List<String> getArgumentNames() {
        return null;
    }
}