/*
 * Copyright 2009-2012 by The Regents of the University of California
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * you may obtain a copy of the License from
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.common;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.junit.Test;

import edu.uci.ics.hyracks.storage.am.common.api.IIndex;
import edu.uci.ics.hyracks.storage.am.common.api.IndexException;
import edu.uci.ics.hyracks.storage.am.common.datagen.TupleGenerator;
import edu.uci.ics.hyracks.storage.am.config.AccessMethodTestsConfig;
import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.api.IInvertedIndexSearchModifier;
import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.ConjunctiveSearchModifier;
import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.EditDistanceSearchModifier;
import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.search.JaccardSearchModifier;
import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext;
import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestContext.InvertedIndexType;
import edu.uci.ics.hyracks.storage.am.lsm.invertedindex.util.LSMInvertedIndexTestUtils;

public abstract class AbstractInvertedIndexSearchTest extends AbstractInvertedIndexTest {

    protected final Logger LOGGER = Logger.getLogger(AbstractInvertedIndexSearchTest.class.getName());

    protected int NUM_DOC_QUERIES = AccessMethodTestsConfig.LSM_INVINDEX_NUM_DOC_QUERIES;
    protected int NUM_RANDOM_QUERIES = AccessMethodTestsConfig.LSM_INVINDEX_NUM_RANDOM_QUERIES;
    protected final boolean bulkLoad;

    public AbstractInvertedIndexSearchTest(InvertedIndexType invIndexType, boolean bulkLoad) {
        super(invIndexType);
        this.bulkLoad = bulkLoad;
    }

    protected void runTest(LSMInvertedIndexTestContext testCtx, TupleGenerator tupleGen,
            List<IInvertedIndexSearchModifier> searchModifiers) throws IOException, IndexException {
        IIndex invIndex = testCtx.getIndex();
        invIndex.create();
        invIndex.activate();

        if (bulkLoad) {
            LSMInvertedIndexTestUtils.bulkLoadInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
        } else {
            LSMInvertedIndexTestUtils.insertIntoInvIndex(testCtx, tupleGen, NUM_DOCS_TO_INSERT);
        }
        invIndex.validate();

        for (IInvertedIndexSearchModifier searchModifier : searchModifiers) {
            if (LOGGER.isLoggable(Level.INFO)) {
                LOGGER.info("Running searches with: " + searchModifier.toString());
            }
            LSMInvertedIndexTestUtils.testIndexSearch(testCtx, tupleGen, harness.getRandom(), NUM_DOC_QUERIES,
                    NUM_RANDOM_QUERIES, searchModifier, SCAN_COUNT_ARRAY);
        }

        invIndex.deactivate();
        invIndex.destroy();
    }

    private void testWordInvIndexIndex(LSMInvertedIndexTestContext testCtx) throws IOException, IndexException {
        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createStringDocumentTupleGen(harness.getRandom());
        List<IInvertedIndexSearchModifier> searchModifiers = new ArrayList<IInvertedIndexSearchModifier>();
        searchModifiers.add(new ConjunctiveSearchModifier());
        searchModifiers.add(new JaccardSearchModifier(1.0f));
        searchModifiers.add(new JaccardSearchModifier(0.9f));
        searchModifiers.add(new JaccardSearchModifier(0.7f));
        searchModifiers.add(new JaccardSearchModifier(0.5f));
        runTest(testCtx, tupleGen, searchModifiers);
    }

    private void testNGramInvIndexIndex(LSMInvertedIndexTestContext testCtx) throws IOException, IndexException {
        TupleGenerator tupleGen = LSMInvertedIndexTestUtils.createPersonNamesTupleGen(harness.getRandom());
        List<IInvertedIndexSearchModifier> searchModifiers = new ArrayList<IInvertedIndexSearchModifier>();
        searchModifiers.add(new ConjunctiveSearchModifier());
        searchModifiers.add(new JaccardSearchModifier(1.0f));
        searchModifiers.add(new JaccardSearchModifier(0.9f));
        searchModifiers.add(new JaccardSearchModifier(0.7f));
        searchModifiers.add(new JaccardSearchModifier(0.5f));
        searchModifiers.add(new EditDistanceSearchModifier(LSMInvertedIndexTestUtils.TEST_GRAM_LENGTH, 0));
        searchModifiers.add(new EditDistanceSearchModifier(LSMInvertedIndexTestUtils.TEST_GRAM_LENGTH, 1));
        searchModifiers.add(new EditDistanceSearchModifier(LSMInvertedIndexTestUtils.TEST_GRAM_LENGTH, 2));
        searchModifiers.add(new EditDistanceSearchModifier(LSMInvertedIndexTestUtils.TEST_GRAM_LENGTH, 3));
        runTest(testCtx, tupleGen, searchModifiers);
    }

    @Test
    public void wordTokensInvIndexTest() throws IOException, IndexException {
        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createWordInvIndexTestContext(harness, invIndexType);
        testWordInvIndexIndex(testCtx);
    }

    @Test
    public void hashedWordTokensInvIndexTest() throws IOException, IndexException {
        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createHashedWordInvIndexTestContext(harness,
                invIndexType);
        testWordInvIndexIndex(testCtx);
    }

    @Test
    public void ngramTokensInvIndexTest() throws IOException, IndexException {
        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createNGramInvIndexTestContext(harness, invIndexType);
        testNGramInvIndexIndex(testCtx);
    }

    @Test
    public void hashedNGramTokensInvIndexTest() throws IOException, IndexException {
        LSMInvertedIndexTestContext testCtx = LSMInvertedIndexTestUtils.createHashedNGramInvIndexTestContext(harness,
                invIndexType);
        testNGramInvIndexIndex(testCtx);
    }

}