/*
 * Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
 *
 * 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 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.
 */

package com.hazelcast.query.impl.predicates;

import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.IMap;
import com.hazelcast.query.EntryObject;
import com.hazelcast.query.Predicate;
import com.hazelcast.query.PredicateBuilder;
import com.hazelcast.query.SqlPredicate;
import com.hazelcast.test.HazelcastSerialClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.io.Serializable;
import java.util.Collection;

import static org.junit.Assert.assertEquals;

@RunWith(HazelcastSerialClassRunner.class)
@Category(QuickTest.class)
public class NestedPredicateTest extends HazelcastTestSupport {

    private IMap<Integer, Body> map;

    @Before
    public void setup() {
        HazelcastInstance instance = createHazelcastInstance();
        map = instance.getMap("map");
    }

    @After
    public void tearDown() {
        shutdownNodeFactory();
    }

    @Test
    public void addingIndexes() {
        // single-attribute index
        map.addIndex("name", true);
        // nested-attribute index
        map.addIndex("limb.name", true);
    }

    @Test
    public void singleAttributeQuery_predicates() throws Exception {
        // GIVEN
        map.put(1, new Body("body1", new Limb("hand")));
        map.put(2, new Body("body2", new Limb("leg")));

        // WHEN
        EntryObject e = new PredicateBuilder().getEntryObject();
        Predicate predicate = e.get("name").equal("body1");
        Collection<Body> values = map.values(predicate);

        // THEN
        assertEquals(1, values.size());
        assertEquals("body1", values.toArray(new Body[values.size()])[0].getName());
    }

    @Test
    public void singleAttributeQuery_distributedSql() throws Exception {
        // GIVEN
        map.put(1, new Body("body1", new Limb("hand")));
        map.put(2, new Body("body2", new Limb("leg")));

        // WHEN
        Collection<Body> values = map.values(new SqlPredicate("name == 'body1'"));

        // THEN
        assertEquals(1, values.size());
        assertEquals("body1", values.toArray(new Body[values.size()])[0].getName());
    }

    @Test
    public void nestedAttributeQuery_predicates() throws Exception {
        // GIVEN
        map.put(1, new Body("body1", new Limb("hand")));
        map.put(2, new Body("body2", new Limb("leg")));

        // WHEN
        EntryObject e = new PredicateBuilder().getEntryObject();
        Predicate predicate = e.get("limb.name").equal("leg");
        Collection<Body> values = map.values(predicate);

        // THEN
        assertEquals(1, values.size());
        assertEquals("body2", values.toArray(new Body[values.size()])[0].getName());
    }

    @Test
    public void nestedAttributeQuery_distributedSql() throws Exception {
        // GIVEN
        map.put(1, new Body("body1", new Limb("hand")));
        map.put(2, new Body("body2", new Limb("leg")));

        // WHEN
        Collection<Body> values = map.values(new SqlPredicate("limb.name == 'leg'"));

        // THEN
        assertEquals(1, values.size());
        assertEquals("body2", values.toArray(new Body[values.size()])[0].getName());
    }

    private static class Body implements Serializable {

        private final String name;
        private final Limb limb;

        Body(String name, Limb limb) {
            this.name = name;
            this.limb = limb;
        }

        String getName() {
            return name;
        }

        Limb getLimb() {
            return limb;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (o == null || getClass() != o.getClass()) {
                return false;
            }

            Body body = (Body) o;

            if (name != null ? !name.equals(body.name) : body.name != null) {
                return false;
            }
            return !(limb != null ? !limb.equals(body.limb) : body.limb != null);

        }

        @Override
        public int hashCode() {
            int result = name != null ? name.hashCode() : 0;
            result = 31 * result + (limb != null ? limb.hashCode() : 0);
            return result;
        }

        @Override
        public String toString() {
            return "Body{" +
                    "name='" + name + '\'' +
                    ", limb=" + limb +
                    '}';
        }
    }

    private static class Limb implements Serializable {

        private final String name;

        Limb(String name) {
            this.name = name;
        }

        String getName() {
            return name;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (o == null || getClass() != o.getClass()) {
                return false;
            }

            Limb limb = (Limb) o;

            return !(name != null ? !name.equals(limb.name) : limb.name != null);
        }

        @Override
        public int hashCode() {
            return name != null ? name.hashCode() : 0;
        }

        @Override
        public String toString() {
            return "Limb{" +
                    "name='" + name + '\'' +
                    '}';
        }
    }
}