/*
 * 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.internal.batchimport;

import static org.neo4j.common.EntityType.RELATIONSHIP;
import static org.neo4j.io.IOUtils.closeAll;

import java.util.function.Function;
import org.neo4j.internal.batchimport.staging.BatchSender;
import org.neo4j.internal.batchimport.staging.StageControl;
import org.neo4j.internal.batchimport.store.BatchingNeoStores;
import org.neo4j.io.pagecache.context.CursorContext;
import org.neo4j.io.pagecache.context.CursorContextFactory;
import org.neo4j.io.pagecache.tracing.PageCacheTracer;
import org.neo4j.kernel.impl.store.record.RelationshipRecord;
import org.neo4j.memory.MemoryTracker;
import org.neo4j.storageengine.api.cursor.StoreCursors;

public class RelationshipTypeIndexWriterStep extends IndexWriterStep<RelationshipRecord[]> {
    private static final String RELATIONSHIP_INDEX_WRITE_STEP_TAG = "relationshipIndexWriteStep";
    private final CursorContext cursorContext;
    private final IndexImporter importer;
    private final IndexImporter.Writer writer;

    public RelationshipTypeIndexWriterStep(
            StageControl control,
            Configuration config,
            BatchingNeoStores neoStores,
            IndexImporterFactory indexImporterFactory,
            MemoryTracker memoryTracker,
            CursorContextFactory contextFactory,
            PageCacheTracer pageCacheTracer,
            Function<CursorContext, StoreCursors> storeCursorsCreator) {
        super(control, "RELATIONSHIP TYPE INDEX", config, 1, contextFactory);
        this.cursorContext = contextFactory.create(RELATIONSHIP_INDEX_WRITE_STEP_TAG);
        this.importer = indexImporter(
                config.indexConfig(),
                indexImporterFactory,
                neoStores,
                RELATIONSHIP,
                memoryTracker,
                contextFactory,
                pageCacheTracer,
                storeCursorsCreator);
        this.writer = importer.writer(false);
    }

    @Override
    protected void process(RelationshipRecord[] batch, BatchSender sender, CursorContext cursorTracer)
            throws Throwable {
        for (RelationshipRecord relationship : batch) {
            if (relationship.inUse()) {
                writer.add(relationship.getId(), new long[] {relationship.getType()});
            }
        }
        sender.send(batch);
    }

    @Override
    public void close() throws Exception {
        super.close();
        closeAll(writer, importer, cursorContext);
    }
}
