/*
 * Druid - a distributed column store.
 * Copyright (C) 2014  Metamarkets Group Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package io.druid.indexing.common.task;

import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.metamx.common.ISE;
import com.metamx.common.logger.Logger;
import io.druid.indexing.common.TaskLock;
import io.druid.indexing.common.TaskStatus;
import io.druid.indexing.common.TaskToolbox;
import io.druid.indexing.common.actions.SegmentListUnusedAction;
import io.druid.indexing.common.actions.SegmentMetadataUpdateAction;
import io.druid.timeline.DataSegment;
import org.joda.time.Interval;

import java.util.List;

public class RestoreTask extends AbstractFixedIntervalTask
{
  private static final Logger log = new Logger(RestoreTask.class);

  public RestoreTask(
      @JsonProperty("id") String id,
      @JsonProperty("dataSource") String dataSource,
      @JsonProperty("interval") Interval interval
  )
  {
    super(
        TaskUtils.makeId(id, "archive", dataSource, interval),
        dataSource,
        interval
    );
  }

  @Override
  public String getType()
  {
    return "restore";
  }

  @Override
    public TaskStatus run(TaskToolbox toolbox) throws Exception
    {
      // Confirm we have a lock (will throw if there isn't exactly one element)
      final TaskLock myLock = Iterables.getOnlyElement(getTaskLocks(toolbox));

      if (!myLock.getDataSource().equals(getDataSource())) {
        throw new ISE("WTF?! Lock dataSource[%s] != task dataSource[%s]", myLock.getDataSource(), getDataSource());
      }

      if (!myLock.getInterval().equals(getInterval())) {
        throw new ISE("WTF?! Lock interval[%s] != task interval[%s]", myLock.getInterval(), getInterval());
      }

      // List unused segments
      final List<DataSegment> unusedSegments = toolbox
          .getTaskActionClient()
          .submit(new SegmentListUnusedAction(myLock.getDataSource(), myLock.getInterval()));

      // Verify none of these segments have versions > lock version
      for (final DataSegment unusedSegment : unusedSegments) {
        if (unusedSegment.getVersion().compareTo(myLock.getVersion()) > 0) {
          throw new ISE(
              "WTF?! Unused segment[%s] has version[%s] > task version[%s]",
              unusedSegment.getIdentifier(),
              unusedSegment.getVersion(),
              myLock.getVersion()
          );
        }

        log.info("OK to restore segment: %s", unusedSegment.getIdentifier());
      }

      List<DataSegment> restoredSegments = Lists.newLinkedList();

      // Move segments
      for (DataSegment segment : unusedSegments) {
        restoredSegments.add(toolbox.getDataSegmentArchiver().restore(segment));
      }

      // Update metadata for moved segments
      toolbox.getTaskActionClient().submit(
          new SegmentMetadataUpdateAction(
              ImmutableSet.copyOf(restoredSegments)
          )
      );

      return TaskStatus.success(getId());
    }
}

@@ -1806,14 +1806,14 @@
 d, %22
-archiv
+restor
 e%22, 

fix task id