/*
 * Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
 * license agreements.  See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial agreement.
 */

package io.crate.executor.transport.merge;

import io.crate.Streamer;
import io.crate.data.ArrayBucket;
import io.crate.executor.transport.distributed.DistributedResultRequest;
import io.crate.test.integration.CrateUnitTest;
import io.crate.types.DataTypes;
import org.apache.lucene.util.BytesRef;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.io.stream.BytesStreamOutput;
import org.elasticsearch.common.io.stream.StreamInput;
import org.junit.Test;

import java.util.UUID;

import static io.crate.testing.TestingHelpers.isNullRow;
import static io.crate.testing.TestingHelpers.isRow;
import static org.hamcrest.Matchers.*;

public class DistributedResultRequestTest extends CrateUnitTest {

    @Test
    public void testStreaming() throws Exception {
        Streamer<?>[] streamers = new Streamer[]{DataTypes.STRING.streamer()};

        Object[][] rows = new Object[][]{
            {new BytesRef("ab")}, {null}, {new BytesRef("cd")}
        };
        UUID uuid = UUID.randomUUID();

        DistributedResultRequest r1 = new DistributedResultRequest(uuid, 1, (byte) 3, 1, streamers, new ArrayBucket(rows), false);

        BytesStreamOutput out = new BytesStreamOutput();
        r1.writeTo(out);
        StreamInput in = out.bytes().streamInput();
        DistributedResultRequest r2 = new DistributedResultRequest();
        r2.readFrom(in);
        r2.streamers(streamers);
        assertTrue(r2.rowsCanBeRead());

        assertEquals(r1.rows().size(), r2.rows().size());
        assertThat(r1.isLast(), is(r2.isLast()));
        assertThat(r1.executionPhaseInputId(), is(r2.executionPhaseInputId()));

        assertThat(r2.rows(), contains(isRow("ab"), isNullRow(), isRow("cd")));
    }

    @Test
    public void testStreamingOfFailure() throws Exception {
        UUID uuid = UUID.randomUUID();
        Throwable throwable = new IllegalStateException("dummy");

        DistributedResultRequest r1 = new DistributedResultRequest(uuid, 1, (byte) 3, 1, throwable, true);

        BytesStreamOutput out = new BytesStreamOutput();
        r1.writeTo(out);
        StreamInput in = StreamInput.wrap(BytesReference.toBytes(out.bytes()));
        DistributedResultRequest r2 = new DistributedResultRequest();
        r2.readFrom(in);

        assertThat(r2.throwable(), instanceOf(throwable.getClass()));
        assertThat(r2.isKilled(), is(r1.isKilled()));
    }
}