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* 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
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package org.apache.cassandra.io.sstable;

import java.io.File;
import java.io.IOException;
import java.util.*;

import org.apache.cassandra.db.*;
import org.apache.cassandra.io.util.DataOutputBuffer;
import org.apache.cassandra.service.StorageService;

public class SSTableUtils
{
    // first configured table and cf
    public static String TABLENAME = "Keyspace1";
    public static String CFNAME = "Standard1";

    public static ColumnFamily createCF(IClock mfda, int ldt, IColumn... cols)
    {
        ColumnFamily cf = ColumnFamily.create(TABLENAME, CFNAME);
        cf.delete(ldt, mfda);
        for (IColumn col : cols)
            cf.addColumn(col);
        return cf;
    }

    public static File tempSSTableFile(String tablename, String cfname) throws IOException
    {
        File tempdir = File.createTempFile(tablename, cfname);
        if(!tempdir.delete() || !tempdir.mkdir())
            throw new IOException("Temporary directory creation failed.");
        tempdir.deleteOnExit();
        File tabledir = new File(tempdir, tablename);
        tabledir.mkdir();
        tabledir.deleteOnExit();
        File datafile = new File(new Descriptor(tabledir, tablename, cfname, 0, false).filenameFor("Data.db"));
        if (!datafile.createNewFile())
            throw new IOException("unable to create file " + datafile);
        datafile.deleteOnExit();
        return datafile;
    }

    public static SSTableReader writeSSTable(Set<String> keys) throws IOException
    {
        Map<String, ColumnFamily> map = new HashMap<String, ColumnFamily>();
        for (String key : keys)
        {
            ColumnFamily cf = ColumnFamily.create(TABLENAME, CFNAME);
            cf.addColumn(new Column(key.getBytes(), key.getBytes(), new TimestampClock(0)));
            map.put(key, cf);
        }
        return writeSSTable(map);
    }

    public static SSTableReader writeSSTable(Map<String, ColumnFamily> entries) throws IOException
    {
        Map<byte[], byte[]> map = new HashMap<byte[], byte[]>();
        for (Map.Entry<String, ColumnFamily> entry : entries.entrySet())
        {
            DataOutputBuffer buffer = new DataOutputBuffer();
            ColumnFamily.serializer().serializeWithIndexes(entry.getValue(), buffer);
            map.put(entry.getKey().getBytes(), Arrays.copyOf(buffer.getData(), buffer.getLength()));
        }
        return writeRawSSTable(TABLENAME, CFNAME, map);
    }

    public static SSTableReader writeRawSSTable(String tablename, String cfname, Map<byte[], byte[]> entries) throws IOException
    {
        File datafile = tempSSTableFile(tablename, cfname);
        SSTableWriter writer = new SSTableWriter(datafile.getAbsolutePath(), entries.size());
        SortedMap<DecoratedKey, byte[]> sortedEntries = new TreeMap<DecoratedKey, byte[]>();
        for (Map.Entry<byte[], byte[]> entry : entries.entrySet())
            sortedEntries.put(writer.partitioner.decorateKey(entry.getKey()), entry.getValue());
        for (Map.Entry<DecoratedKey, byte[]> entry : sortedEntries.entrySet())
            writer.append(entry.getKey(), entry.getValue());
        new File(writer.desc.filenameFor(Component.PRIMARY_INDEX)).deleteOnExit();
        new File(writer.desc.filenameFor(Component.FILTER)).deleteOnExit();
        return writer.closeAndOpenReader();
    }

}