/**
 * 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.
 */

package org.apache.hcatalog.mapreduce;

import junit.framework.Assert;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.serde2.thrift.test.IntString;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.SequenceFile;
import org.apache.pig.ExecType;
import org.apache.pig.PigServer;
import org.apache.pig.data.DataType;
import org.apache.pig.data.Tuple;
import org.apache.pig.impl.logicalLayer.schema.Schema;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.transport.TIOStreamTransport;
import org.junit.Before;
import org.junit.Test;

import java.io.ByteArrayOutputStream;
import java.util.Iterator;

public class TestHCatHiveThriftCompatibility extends HCatBaseTest {

    private boolean setUpComplete = false;
    private Path intStringSeq;

    @Before
    @Override
    public void setUp() throws Exception {
        super.setUp();
        if (setUpComplete) {
            return;
        }

        ByteArrayOutputStream out = new ByteArrayOutputStream();
        TIOStreamTransport transport = new TIOStreamTransport(out);
        TBinaryProtocol protocol = new TBinaryProtocol(transport);

        IntString intString = new IntString(1, "one", 1);
        intString.write(protocol);
        BytesWritable bytesWritable = new BytesWritable(out.toByteArray());

        intStringSeq = new Path(TEST_DATA_DIR + "/data/intString.seq");
        LOG.info("Creating data file: " + intStringSeq);

        SequenceFile.Writer seqFileWriter = SequenceFile.createWriter(
                intStringSeq.getFileSystem(hiveConf), hiveConf, intStringSeq,
                NullWritable.class, BytesWritable.class);
        seqFileWriter.append(NullWritable.get(), bytesWritable);
        seqFileWriter.close();

        setUpComplete = true;
    }

    /**
     *  Create a table with no explicit schema and ensure its correctly
     *  discovered from the thrift struct.
     */
    @Test
    public void testDynamicCols() throws Exception {
        Assert.assertEquals(0, driver.run("drop table if exists test_thrift").getResponseCode());
        Assert.assertEquals(0, driver.run(
                "create external table test_thrift " +
                        "partitioned by (year string) " +
                        "row format serde 'org.apache.hadoop.hive.serde2.thrift.ThriftDeserializer' " +
                        "with serdeproperties ( " +
                        "  'serialization.class'='org.apache.hadoop.hive.serde2.thrift.test.IntString', " +
                        "  'serialization.format'='org.apache.thrift.protocol.TBinaryProtocol') " +
                        "stored as" +
                        "  inputformat 'org.apache.hadoop.mapred.SequenceFileInputFormat'" +
                        "  outputformat 'org.apache.hadoop.hive.ql.io.HiveIgnoreKeyTextOutputFormat'")
                .getResponseCode());
        Assert.assertEquals(0,
                driver.run("alter table test_thrift add partition (year = '2012') location '" +
                        intStringSeq.getParent() + "'").getResponseCode());

        PigServer pigServer = new PigServer(ExecType.LOCAL);
        pigServer.registerQuery("A = load 'test_thrift' using org.apache.hcatalog.pig.HCatLoader();");

        Schema expectedSchema = new Schema();
        expectedSchema.add(new Schema.FieldSchema("myint", DataType.INTEGER));
        expectedSchema.add(new Schema.FieldSchema("mystring", DataType.CHARARRAY));
        expectedSchema.add(new Schema.FieldSchema("underscore_int", DataType.INTEGER));
        expectedSchema.add(new Schema.FieldSchema("year", DataType.CHARARRAY));

        Assert.assertEquals(expectedSchema, pigServer.dumpSchema("A"));

        Iterator<Tuple> iterator = pigServer.openIterator("A");
        Tuple t = iterator.next();
        Assert.assertEquals(1, t.get(0));
        Assert.assertEquals("one", t.get(1));
        Assert.assertEquals(1, t.get(2));
        Assert.assertEquals("2012", t.get(3));

        Assert.assertFalse(iterator.hasNext());
    }
}