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 *
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 at
 *
 *    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.
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package org.apache.usergrid.persistence.index.impl;


import java.util.*;

import org.apache.usergrid.persistence.core.CassandraFig;
import org.apache.usergrid.persistence.index.*;
import org.apache.usergrid.persistence.model.entity.SimpleId;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.apache.usergrid.persistence.core.guice.MigrationManagerRule;
import org.apache.usergrid.persistence.core.scope.ApplicationScopeImpl;
import org.apache.usergrid.persistence.core.test.UseModules;
import org.apache.usergrid.persistence.index.guice.TestIndexModule;
import org.apache.usergrid.persistence.model.entity.Entity;
import org.apache.usergrid.persistence.model.field.LocationField;
import org.apache.usergrid.persistence.model.field.StringField;
import org.apache.usergrid.persistence.model.field.value.Location;
import org.apache.usergrid.persistence.model.util.EntityUtils;
import org.apache.usergrid.persistence.model.util.UUIDGenerator;

import com.google.inject.Inject;

import static org.apache.usergrid.persistence.core.util.IdGenerator.createId;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;


/**
 * // TODO: Document this
 *
 * @since 4.0
 */

@RunWith( EsRunner.class )
@UseModules( { TestIndexModule.class } )
public class GeoPagingTest extends BaseIT {
    private static final  Logger log = LoggerFactory.getLogger( GeoPagingTest.class );

    @Inject
    public EntityIndexFactory eif;

    @Inject
    @Rule
    public MigrationManagerRule migrationManagerRule;

    @Inject
    public IndexFig fig;

    @Inject
    public CassandraFig cassandraFig;

    @Inject
    public IndexProducer indexProducer;

    @Inject
    @Rule
    public ElasticSearchRule elasticSearchRule;
    private EntityIndex entityIndex;
    private SimpleId appId;


    @Before
    public void setup(){
        appId = new SimpleId(UUID.randomUUID(), "application" );

        IndexLocationStrategy strategy =new TestIndexIdentifier(cassandraFig,fig,new ApplicationScopeImpl(appId));

        entityIndex = eif.createEntityIndex( strategy );
    }


    /**
     * Test that geo-query returns co-located entities in expected order.
     */
    @Test
    public void groupQueriesWithDistanceOrderedResults() throws Exception {

        int maxRangeLimit = 9;
        Entity[] cats = new Entity[maxRangeLimit + 1];


        final EntityIndexBatch batch = entityIndex.createBatch();


        final IndexEdge edge = new IndexEdgeImpl(createId("root"), "testType", SearchEdge.NodeType.SOURCE,  1000  );

        //Create several entities, saved in reverse order so we have highest time UUID as "closest" to ensure that
        //our geo order works correctly
        for ( int i = maxRangeLimit; i >= 0; i-- ) {
            Entity cat = new Entity("cat");
            EntityUtils.setVersion( cat, UUIDGenerator.newTimeUUID() );


            cat.setField( new StringField("name", "cat" + i ));
            cat.setField( new LocationField("location", new Location(37.0 + i ,  -75.0 + i ) ) );
            cats[i] = cat;

            batch.index( edge, cat );

        }

        indexProducer.put( batch.build()).subscribe();

        entityIndex.refreshAsync().toBlocking().last();



        final String query =  "select * where location within 1500000 of 37, -75" ;

        final CandidateResults
                candidates = entityIndex.search( edge, SearchTypes.fromTypes( "cat" ), query, 100, 0, false );

        assertNotNull( candidates );


        for ( int consistent = 0; consistent < maxRangeLimit; consistent++ ) {
            //got entities back, just need to page through them and make sure that i got them in location order.
            CandidateResult candidate = candidates.get( consistent );
            assertNotNull( candidate );


            final Entity expected = cats[consistent];
            assertEquals(expected.getId(), candidate.getId());


        }
    }
}