/*
 * 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.cassandra.utils;

import static org.apache.cassandra.Util.*;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.db.ColumnFamily;
import org.apache.cassandra.db.TreeMapBackedSortedColumns;
import org.apache.cassandra.db.TypeSizes;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.utils.vint.EncodedDataInputStream;
import org.apache.cassandra.utils.vint.EncodedDataOutputStream;

import org.junit.Assert;
import org.junit.Test;

public class EncodedStreamsTest extends SchemaLoader
{
    private String keyspaceName = "Keyspace1";
    private String standardCFName = "Standard1";
    private String counterCFName = "Counter1";
    private String superCFName = "Super1";

    private int version = MessagingService.current_version;

    @Test
    public void testStreams() throws IOException
    {
        ByteArrayOutputStream byteArrayOStream1 = new ByteArrayOutputStream();
        EncodedDataOutputStream odos = new EncodedDataOutputStream(byteArrayOStream1);

        ByteArrayOutputStream byteArrayOStream2 = new ByteArrayOutputStream();
        DataOutputStream out = new DataOutputStream(byteArrayOStream2);
        
        for (short i = 0; i < 10000; i++)
        {
            out.writeShort(i);
            odos.writeShort(i);
        }
        out.flush();
        odos.flush();

        for (int i = Short.MAX_VALUE; i < ((int)Short.MAX_VALUE + 10000); i++)
        {
            out.writeInt(i);
            odos.writeInt(i);
        }
        out.flush();
        odos.flush();

        for (long i = Integer.MAX_VALUE; i < ((long)Integer.MAX_VALUE + 10000);i++)
        {
            out.writeLong(i);
            odos.writeLong(i);
        }
        out.flush();
        odos.flush();
        Assert.assertTrue(byteArrayOStream1.size() < byteArrayOStream2.size());

        ByteArrayInputStream byteArrayIStream1 = new ByteArrayInputStream(byteArrayOStream1.toByteArray());
        EncodedDataInputStream idis = new EncodedDataInputStream(new DataInputStream(byteArrayIStream1));

        // assert reading Short
        for (int i = 0; i < 10000; i++)
            Assert.assertEquals(i, idis.readShort());

        // assert reading Integer
        for (int i = Short.MAX_VALUE; i < ((int)Short.MAX_VALUE + 10000); i++)
            Assert.assertEquals(i, idis.readInt());

        // assert reading Long
        for (long i = Integer.MAX_VALUE; i < ((long)Integer.MAX_VALUE) + 1000; i++)
            Assert.assertEquals(i, idis.readLong());
    }

    private ColumnFamily createCF()
    {
        ColumnFamily cf = TreeMapBackedSortedColumns.factory.create(keyspaceName, standardCFName);
        cf.addColumn(column("vijay", "try", 1));
        cf.addColumn(column("to", "be_nice", 1));
        return cf;
    }

    private ColumnFamily createCounterCF()
    {
        ColumnFamily cf = TreeMapBackedSortedColumns.factory.create(keyspaceName, counterCFName);
        cf.addColumn(counterColumn("vijay", 1L, 1));
        cf.addColumn(counterColumn("wants", 1000000, 1));
        return cf;
    }

    @Test
    public void testCFSerialization() throws IOException
    {
        ByteArrayOutputStream byteArrayOStream1 = new ByteArrayOutputStream();
        EncodedDataOutputStream odos = new EncodedDataOutputStream(byteArrayOStream1);
        ColumnFamily.serializer.serialize(createCF(), odos, version);

        ByteArrayInputStream byteArrayIStream1 = new ByteArrayInputStream(byteArrayOStream1.toByteArray());
        EncodedDataInputStream odis = new EncodedDataInputStream(new DataInputStream(byteArrayIStream1));
        ColumnFamily cf = ColumnFamily.serializer.deserialize(odis, version);
        Assert.assertEquals(cf, createCF());
        Assert.assertEquals(byteArrayOStream1.size(), (int) ColumnFamily.serializer.serializedSize(cf, TypeSizes.VINT, version));
    }

    @Test
    public void testCounterCFSerialization() throws IOException
    {
        ByteArrayOutputStream byteArrayOStream1 = new ByteArrayOutputStream();
        EncodedDataOutputStream odos = new EncodedDataOutputStream(byteArrayOStream1);
        ColumnFamily.serializer.serialize(createCounterCF(), odos, version);

        ByteArrayInputStream byteArrayIStream1 = new ByteArrayInputStream(byteArrayOStream1.toByteArray());
        EncodedDataInputStream odis = new EncodedDataInputStream(new DataInputStream(byteArrayIStream1));
        ColumnFamily cf = ColumnFamily.serializer.deserialize(odis, version);
        Assert.assertEquals(cf, createCounterCF());
        Assert.assertEquals(byteArrayOStream1.size(), (int) ColumnFamily.serializer.serializedSize(cf, TypeSizes.VINT, version));
    }
}