/*
 * Copyright 2009-2010 by The Regents of the University of California
 * Licensed 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 from
 * 
 *     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 edu.uci.ics.hyracks.control.cc.work;

import java.util.Set;
import java.util.logging.Logger;

import org.json.JSONException;
import org.json.JSONObject;

import edu.uci.ics.hyracks.api.exceptions.HyracksException;
import edu.uci.ics.hyracks.api.job.ActivityClusterGraph;
import edu.uci.ics.hyracks.api.job.JobId;
import edu.uci.ics.hyracks.api.job.JobStatus;
import edu.uci.ics.hyracks.control.cc.ClusterControllerService;
import edu.uci.ics.hyracks.control.cc.NodeControllerState;
import edu.uci.ics.hyracks.control.cc.application.CCApplicationContext;
import edu.uci.ics.hyracks.control.cc.job.JobRun;
import edu.uci.ics.hyracks.control.common.work.AbstractWork;

public class JobCleanupWork extends AbstractWork {
    private static final Logger LOGGER = Logger.getLogger(JobCleanupWork.class.getName());

    private ClusterControllerService ccs;
    private JobId jobId;
    private JobStatus status;
    private Exception exception;

    public JobCleanupWork(ClusterControllerService ccs, JobId jobId, JobStatus status, Exception exception) {
        this.ccs = ccs;
        this.jobId = jobId;
        this.status = status;
        this.exception = exception;
    }

    @Override
    public void run() {
        final JobRun run = ccs.getActiveRunMap().get(jobId);
        if (run == null) {
            LOGGER.warning("Unable to find JobRun with id: " + jobId);
            return;
        }
        if (run.getPendingStatus() != null) {
            LOGGER.warning("Ignoring duplicate cleanup for JobRun with id: " + jobId);
            return;
        }
        Set<String> targetNodes = run.getParticipatingNodeIds();
        run.getCleanupPendingNodeIds().addAll(targetNodes);
        run.setPendingStatus(status, exception);
        if (targetNodes != null && !targetNodes.isEmpty()) {
            for (String n : targetNodes) {
                NodeControllerState ncs = ccs.getNodeMap().get(n);
                try {
                    ncs.getNodeController().cleanUpJoblet(jobId, status);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        } else {
            CCApplicationContext appCtx = ccs.getApplicationContext();
            if (appCtx != null) {
                try {
                    appCtx.notifyJobFinish(jobId);
                } catch (HyracksException e) {
                    e.printStackTrace();
                }
            }
            run.setStatus(run.getPendingStatus(), run.getPendingException());
            ccs.getActiveRunMap().remove(jobId);
            ccs.getRunMapArchive().put(jobId, run);
            try {
                ccs.getJobLogFile().log(createJobLogObject(run));
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }

    private JSONObject createJobLogObject(final JobRun run) {
        JSONObject jobLogObject = new JSONObject();
        try {
            ActivityClusterGraph acg = run.getActivityClusterGraph();
            jobLogObject.put("activity-cluster-graph", acg.toJSON());
            jobLogObject.put("job-run", run.toJSON());
        } catch (JSONException e) {
            throw new RuntimeException(e);
        }
        return jobLogObject;
    }
}