/*
 * This file is part of Araknemu.
 *
 * Araknemu is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Araknemu 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Araknemu.  If not, see <https://www.gnu.org/licenses/>.
 *
 * Copyright (c) 2017-2019 Vincent Quatrevieux
 */

package fr.quatrevieux.araknemu.core.config;

import org.apache.commons.lang3.tuple.Pair;
import org.checkerframework.checker.nullness.qual.Nullable;
import org.ini4j.Profile;

import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

/**
 * Configuration Pool for ini
 */
public final class IniPool implements Pool {
    private final Profile.Section section;

    public IniPool(Profile.Section section) {
        this.section = section;
    }

    @Override
    public boolean has(String key) {
        return section.containsKey(key);
    }

    @Override
    public @Nullable String get(String key) {
        return section.get(key);
    }

    @Override
    public List<String> getAll(String key) {
        final List<String> values = section.getAll(key);

        return values != null ? values : Collections.emptyList();
    }

    @Override
    public Iterator<Map.Entry<String, String>> iterator() {
        return section.keySet().stream()
            .flatMap(name -> section.getAll(name)
                .stream()
                .map(value -> (Map.Entry<String, String>) Pair.of(name, value))
            )
            .iterator()
        ;
    }
}