/*
 *
 * Copyright 2013 Hewlett-Packard Development Company, L.P.
 *
 * 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 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 hudson.plugins.gearman;

import hudson.model.Run;
import hudson.model.Executor;

import java.io.UnsupportedEncodingException;
import java.util.Map;

import org.gearman.client.GearmanJobResult;
import org.gearman.client.GearmanJobResultImpl;
import org.gearman.worker.AbstractGearmanFunction;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

/**
 * This is a gearman function that will cancel/abort jenkins builds
 *
 * @author Khai Do
 */
public class StopJobWorker extends AbstractGearmanFunction {

    private static final Logger logger = LoggerFactory
            .getLogger(Constants.PLUGIN_LOGGER_NAME);


    /*
     * The Gearman Function
     * @see org.gearman.worker.AbstractGearmanFunction#executeFunction()
     */
    @Override
    public GearmanJobResult executeFunction() {

        // check job results
        boolean jobResult = false;
        String jobResultMsg = "";

        String decodedData;
        // decode json
        try {
            decodedData = new String((byte[]) this.data, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new IllegalArgumentException("Unsupported encoding exception in argument");
        }
        // convert parameters passed in from client to hash map
        Gson gson = new Gson();
        Map<String, String> data = gson.fromJson(decodedData,
                new TypeToken<Map<String, String>>() {
                }.getType());

        // get build id
        String jobName = data.get("name");
        String buildNumber = data.get("number");
        if (jobName.isEmpty() || buildNumber.isEmpty()) {
            throw new IllegalArgumentException("Build id is invalid or not specified");
        }

        // Abort running jenkins build that contain matching uuid
        Run<?,?> build = GearmanPluginUtil.findBuild(jobName, Integer.parseInt(buildNumber));
        if (build != null) {
            if (build.isBuilding()) {
                Executor executor = build.getExecutor();
                // abort the running jenkins build
                if (!executor.isInterrupted()) {
                    executor.interrupt();
                    logger.info("---- Aborting build : " +
                                jobName + ": " + buildNumber);
                    jobResult = true;
                }
            } else {
                logger.info("---- Request to abourt non-building build : " +
                            jobName + ": " + buildNumber);
            }
        } else {
            throw new IllegalArgumentException("Cannot find build " +
                                               jobName + ": " + buildNumber);
        }

        GearmanJobResult gjr = new GearmanJobResultImpl(this.jobHandle, jobResult,
                jobResultMsg.getBytes(), null, null, 0, 0);
        return gjr;
    }
}