/*
 * This is eMonocot, a global online biodiversity information resource.
 *
 * Copyright © 2011–2015 The Board of Trustees of the Royal Botanic Gardens, Kew and The University of Oxford
 *
 * eMonocot is free software: you can redistribute it and/or modify it under the terms of the
 * GNU Affero General Public License as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *
 * eMonocot 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 Affero General Public License for more details.
 *
 * The complete text of the GNU Affero General Public License is in the source repository as the file
 * ‘COPYING’.  It is also available from <http://www.gnu.org/licenses/>.
 */
package org.emonocot.job.iucn;

import java.io.File;
import java.util.UUID;

import org.springframework.batch.core.StepContribution;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.batch.item.ExecutionContext;
import org.springframework.batch.repeat.RepeatStatus;

/**
 *
 * @author ben
 *
 */
public class SetTemporaryFilenamesTasklet implements Tasklet {

	private String harvesterSpoolDirectory;

	private String subtribe;

	private String tribe;

	private String subfamily;

	private String family;

	public void setHarvesterSpoolDirectory(String newHarvesterSpoolDirectory) {
		this.harvesterSpoolDirectory = newHarvesterSpoolDirectory;
	}

	public void setSubtribe(String subtribe) {
		this.subtribe = subtribe;
	}

	public void setTribe(String tribe) {
		this.tribe = tribe;
	}

	public void setSubfamily(String subfamily) {
		this.subfamily = subfamily;
	}

	public void setFamily(String family) {
		this.family = family;
	}

	/**
	 * @param contribution Set the step contribution
	 * @param chunkContext Set the chunk context
	 * @return the repeat status
	 * @throws Exception if there is a problem deleting the resources
	 */
	public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext)
			throws Exception {
		UUID uuid1 = UUID.randomUUID();
		String splitFileName = harvesterSpoolDirectory + File.separator + uuid1.toString() + ".json";
		UUID uuid2 = UUID.randomUUID();
		String temporaryFileName = harvesterSpoolDirectory + File.separator + uuid2.toString() + ".json";

		File temporaryFile = new File(temporaryFileName);
		File splitFile = new File(splitFileName);
		ExecutionContext executionContext = chunkContext.getStepContext().getStepExecution().getJobExecution().getExecutionContext();

		String subsetRank = null;
		String subsetValue = null;

		if (subtribe != null) {
			subsetRank = "subtribe";
			subsetValue = subtribe;
		} else if (tribe != null) {
			subsetRank = "tribe";
			subsetValue = tribe;
		} else if (subfamily != null) {
			subsetRank = "subfamily";
			subsetValue = subfamily;
		} else if (family != null) {
			subsetRank = "family";
			subsetValue = family;
		}

		String queryString = null;
		if (subsetValue != null) {
			queryString = "select t.id from Taxon t left join t.acceptedNameUsage a  where t.#subsetRank = :subsetValue or a.#subsetRank = :subsetValue";
			queryString = queryString.replaceAll("#subsetRank", subsetRank);
			executionContext.put("index.taxon.subset.value", subsetValue);
		} else {
			queryString = "select t.id from MeasurementOrFact m join m.taxon t join m.annotations a where a.jobId = :jobId";
		}

		executionContext.put("index.taxon.query", queryString);
		executionContext.put("temporary.file.name", temporaryFile.getAbsolutePath());
		executionContext.put("split.file.name", splitFile.getAbsolutePath());
		executionContext.putLong("job.execution.id", chunkContext.getStepContext().getStepExecution().getJobExecutionId());
		return RepeatStatus.FINISHED;
	}
}