/**
 * 
 */
package org.gcube.accounting.datamodel.implementations;

import java.io.Serializable;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.Calendar;
import java.util.Map;

import org.gcube.accounting.datamodel.BasicUsageRecord;
import org.gcube.accounting.datamodel.SingleUsageRecord;
import org.gcube.accounting.datamodel.UsageRecord;
import org.gcube.accounting.datamodel.decorators.ComputedField;
import org.gcube.accounting.datamodel.decorators.FieldAction;
import org.gcube.accounting.datamodel.decorators.FieldDecorator;
import org.gcube.accounting.datamodel.decorators.RequiredField;
import org.gcube.accounting.datamodel.deprecationmanagement.annotations.MoveToOperationResult;
import org.gcube.accounting.datamodel.validations.annotations.NotEmpty;
import org.gcube.accounting.datamodel.validations.annotations.ValidInteger;
import org.gcube.accounting.datamodel.validations.annotations.ValidLong;
import org.gcube.accounting.exception.InvalidValueException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
 *
 */
public class JobUsageRecord extends BasicUsageRecord implements SingleUsageRecord {
	
	private static Logger logger = LoggerFactory.getLogger(JobUsageRecord.class);
	
	/**
	 * Generated Serial Version UID
	 */
	private static final long serialVersionUID = -8648691183939346858L;
	
	protected static enum JobStatus {
		completed, failed 
	};
	
	@RequiredField @NotEmpty
	public static final String JOB_ID = "jobId";
	@RequiredField @NotEmpty
	public static final String JOB_QUALIFIER = "jobQualifier";
	@RequiredField @NotEmpty
	public static final String JOB_NAME = "jobName";
	@RequiredField @ValidLong @CalculateWallDuration
	public static final String JOB_START_TIME = "jobStartTime";
	@RequiredField @ValidLong @CalculateWallDuration
	public static final String JOB_END_TIME = "jobEndTime";
	@MoveToOperationResult
	protected static final String JOB_STATUS = "jobStatus";
	@ValidInteger
	public static final String VMS_USED = "vmsUsed";
	@ComputedField @ValidLong @CalculateWallDuration
	protected static final String WALL_DURATION = "wallDuration";
	
	@Target(ElementType.FIELD)
	@Retention(RetentionPolicy.RUNTIME)
	@FieldDecorator(managed=CalculateWallDurationAction.class) 
	protected @interface CalculateWallDuration {}
	
	protected class CalculateWallDurationAction implements FieldAction {
		@Override
		public Serializable validate(String key, Serializable value, UsageRecord usageRecord) throws InvalidValueException  {
			try {
				long wallDuration = calculateWallDuration();
				if(key.compareTo(WALL_DURATION)==0){
					logger.warn("{} is automatically computed using {} and {}. This invocation has the only effect of recalculating the value. Any provided value is ignored.", 
							WALL_DURATION, JOB_START_TIME, JOB_END_TIME);
					value = wallDuration;
				}
			}catch(InvalidValueException e){ }
			return value;
		}
	}
	
	
	public JobUsageRecord(){
		super();
	}
	
	public JobUsageRecord(Map<String, Serializable> properties) throws InvalidValueException{
		super(properties);
	}
	
	/**
	 * @return the Job Id
	 */
	public String getJobId() {
		return (String) this.resourceProperties.get(JOB_ID);
	}

	/**
	 * @param jobId Job Id
	 * @throws InvalidValueException if fails
	 */
	public void setJobId(String jobId) throws InvalidValueException {
		setResourceProperty(JOB_ID, jobId);
	}
	
	public String getJobQualifier() {
		return (String) this.resourceProperties.get(JOB_QUALIFIER);
	}

	public void setJobQualifier(String jobQualifier) throws InvalidValueException {
		setResourceProperty(JOB_QUALIFIER, jobQualifier);
	}
	
	public String getJobName() {
		return (String) this.resourceProperties.get(JOB_NAME);
	}

	public void setJobName(String jobName) throws InvalidValueException {
		setResourceProperty(JOB_NAME, jobName);
	}
	
	public Calendar getJobStartTime() {
		long millis = (Long) this.resourceProperties.get(JOB_START_TIME);
		return timestampStringToCalendar(millis);
	}
		
	public void setJobStartTime(Calendar jobStartTime) throws InvalidValueException {
		setResourceProperty(JOB_START_TIME, jobStartTime.getTimeInMillis());
		
	}
	
	public Calendar getJobEndTime() {
		long millis = (Long) this.resourceProperties.get(JOB_END_TIME);
		return timestampStringToCalendar(millis);
	}
		
	public void setJobEndTime(Calendar jobEndTime) throws InvalidValueException {
		setResourceProperty(JOB_END_TIME, jobEndTime.getTimeInMillis());
		
	}
	
	/*
	@Deprecated
	protected JobStatus getJobStatus() {
		return JobStatus.values()[((OperationResult) this.resourceProperties.get(OPERATION_RESULT)).ordinal()];
	}

	@Deprecated
	protected void setJobStatus(JobStatus jobStatus) throws InvalidValueException {
		setResourceProperty(OPERATION_RESULT, jobStatus);
	}
	*/
	
	public int getVmsUsed() {
		return (Integer) this.resourceProperties.get(VMS_USED);
	}

	public void setVmsUsed(int vmsUsed) throws InvalidValueException {
		setResourceProperty(VMS_USED, vmsUsed);
	}
	
	protected long calculateWallDuration() throws InvalidValueException {
		try {
			long endTime = (Long) this.resourceProperties.get(JOB_END_TIME);
			long startTime = (Long) this.resourceProperties.get(JOB_START_TIME);
			long wallDuration = endTime - startTime;
			setResourceProperty(WALL_DURATION, wallDuration);
			return wallDuration;
		}catch(Exception e){
			throw new InvalidValueException(String.format("To calculate Wall Duration both %s and %s must be set", 
					START_TIME, END_TIME), e.getCause());
		}
	}
	
	public long getWallDuration() {
		Long wallDuration = (Long) this.resourceProperties.get(WALL_DURATION);
		if(wallDuration == null){
			try {
				wallDuration = calculateWallDuration();
			} catch(Exception e){}
		}
		return wallDuration;
	}
	
}