/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.kernel.impl.index.schema;

import java.io.IOException;
import java.io.UncheckedIOException;
import java.util.Map;
import org.neo4j.dbms.database.readonly.DatabaseReadOnlyChecker;
import org.neo4j.internal.schema.IndexDescriptor;
import org.neo4j.kernel.api.index.MinimalIndexAccessor;
import org.neo4j.values.storable.Value;

public class NativeMinimalIndexAccessor implements MinimalIndexAccessor {
    private final IndexDescriptor descriptor;
    private final IndexFiles indexFiles;
    private final DatabaseReadOnlyChecker readOnlyChecker;
    private final boolean archiveOnDrop;

    public NativeMinimalIndexAccessor(
            IndexDescriptor descriptor,
            IndexFiles indexFiles,
            DatabaseReadOnlyChecker readOnlyChecker,
            boolean archiveOnDrop) {
        this.descriptor = descriptor;
        this.indexFiles = indexFiles;
        this.readOnlyChecker = readOnlyChecker;
        this.archiveOnDrop = archiveOnDrop;
    }

    @Override
    public void drop() {
        if (readOnlyChecker.isReadOnly()) {
            throw new IllegalStateException("Cannot drop read-only index.");
        }
        if (archiveOnDrop) {
            try {
                indexFiles.archiveIndex();
            } catch (IOException e) {
                throw new UncheckedIOException(e);
            }
        }
        indexFiles.clear();
    }

    @Override
    public Map<String, Value> indexConfig() {
        return descriptor.getIndexConfig().asMap();
    }
}
