/*
 * 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.uima.ducc.orchestrator.factory;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;

import org.apache.uima.ducc.common.utils.DuccLogger;
import org.apache.uima.ducc.common.utils.DuccLoggerComponents;
import org.apache.uima.ducc.common.utils.DuccPropertiesResolver;
import org.apache.uima.ducc.common.utils.QuotedOptions;
import org.apache.uima.ducc.common.utils.id.DuccId;
import org.apache.uima.ducc.transport.event.cli.JobRequestProperties;
import org.apache.uima.ducc.transport.event.cli.JobSpecificationProperties;

public class JobFactoryHelper {
	
	private static final DuccLogger logger = DuccLoggerComponents.getOrLogger(JobFactoryHelper.class.getName());
	private static final DuccId jobid = null;
	
	public static long KB = 1024;
	public static long MB = 1024*KB;
	public static long GB = 1024*MB;
	
	public static long defaultBytesSizeJobProcess = 1*GB;
	public static long defaultBytesSizeJobDriver = 300*MB;
	
	public static long getDefaultByteSizeJobProcess() {
		return defaultBytesSizeJobProcess;
	}
	
	public static long getByteSizeJobProcess(String process_memory_size) {
		String location = "getByteSizeJobProcess";
		long retVal = getDefaultByteSizeJobProcess();
		if(process_memory_size != null) {
			String memory_size = process_memory_size.trim();
			if(memory_size.length() > 0) {
				try {
					retVal = Long.parseLong(process_memory_size);
				}
				catch(Exception e) {
					logger.error(location, jobid, e);
				}
			}
			else {
				logger.info(location, jobid, "memory size: empty");
			}
		}
		else {
			logger.info(location, jobid, "memory size: null");
		}
		logger.debug(location, jobid, retVal);
		return retVal;
	}
	
	public static long getDefaultByteSizeJobDriver() {
		return defaultBytesSizeJobDriver;
	}
	
	private static AtomicLong jdSize = new AtomicLong(0);
	
	public static long getByteSizeJobDriver() {
		String location = "getByteSizeJobDriver";
		long retVal = getDefaultByteSizeJobDriver();
		try {
			String ducc_jd_share_quantum = DuccPropertiesResolver.getInstance().getFileProperty(DuccPropertiesResolver.ducc_jd_share_quantum);
			long sizeNew = Long.parseLong(ducc_jd_share_quantum) * MB;
			if(sizeNew > 0) {
				long sizeOld = jdSize.get();
				if(sizeNew != sizeOld) {
					jdSize.set(sizeNew);
					logger.info(location, jobid, "old: "+sizeOld+" "+"new: "+sizeNew);
				}
				retVal = sizeNew;
			}
			else {
				logger.warn(location, jobid, DuccPropertiesResolver.ducc_jd_share_quantum+"="+ducc_jd_share_quantum+" "+"invalid");
			}
		}
		catch(Exception e) {
			logger.error(location, jobid, e);
		}
		logger.debug(location, jobid, retVal);
		return retVal;
	}
	
	/**
	 * @param jobid the DuccId for the Job
	 * @param jobSpec the Job specification
	 * @return environment variable map derived from user specified environment variable string
	 */
	public static Map<String, String> getEnvMap(DuccId jobid, JobRequestProperties jobSpec) {
		String location = "getEnvMap";
		Map<String, String> retVal = new HashMap<String,String>();
		if(jobSpec != null) {
			String environmentVariables = jobSpec.getProperty(JobSpecificationProperties.key_environment);
			if(environmentVariables != null) {
				ArrayList<String> envVarList = QuotedOptions.tokenizeList(environmentVariables, true);
				try {
					Map<String, String> envMap = QuotedOptions.parseAssignments(envVarList, 0);
					if(envMap != null) {
						retVal = envMap;
					}
				} 
				catch (IllegalArgumentException e) {
	                logger.warn(location, jobid,"Invalid environment syntax in: " + environmentVariables);
				}
			}
			else {
				logger.trace(location, jobid, "environmentVariables="+environmentVariables);
			}
		}
		else {
			logger.debug(location, jobid, "jobSpec="+jobSpec);
		}
		return retVal;
	}
	
	/**
	 * @param jobid the DuccId for the Job
	 * @param jobSpec the Job specification
	 * @param envKey the environment variable key (name)
	 * @return the environment variable value for the specified key (name)
	 */
	public static String getEnvVal(DuccId jobid, JobRequestProperties jobSpec, String envKey) {
		String location = "getEnvVal";
		String retVal = null;
		if(envKey != null) {
			Map<String, String> envMap = getEnvMap(jobid, jobSpec);
			retVal = envMap.get(envKey);
			logger.debug(location, jobid, "envKey="+envKey+" "+"envVal="+retVal);
		}
		else {
			logger.debug(location, jobid, "envKey="+envKey);
		}
		return retVal;
	}
	
	/**
	 * @param jobid the DuccId for the Job
	 * @param jobSpec the Job specification
	 * @param envKey the environment variable key (name)
	 * @param envVal the environment variable default value
	 * @return the environment variable value for the specified key (name)
	 */
	public static String getEnvVal(DuccId jobid, JobRequestProperties jobSpec, String envKey, String envVal) {
		String location = "getEnvVal";
		String retVal = getEnvVal(jobid, jobSpec, envKey);
		if(retVal == null) {
			retVal = envVal;
			logger.debug(location, jobid, "envKey="+envKey+" "+"envVal="+retVal+" "+"(default)");
		}
		return retVal;
	}
}