/*
 * 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.taxonmatch;

import java.io.IOException;
import java.io.Writer;

import org.emonocot.model.Taxon;
import org.springframework.batch.core.ExitStatus;
import org.springframework.batch.core.ItemProcessListener;
import org.springframework.batch.core.StepExecution;
import org.springframework.batch.core.StepExecutionListener;
import org.springframework.batch.item.file.FlatFileFooterCallback;

/**
 *
 * @author ben
 *
 */
public class StatusTallyingFooterCallback implements ItemProcessListener<Taxon, Result>, StepExecutionListener,
FlatFileFooterCallback {

	/**
	 *
	 */
	private int cannotParse = 0;

	/**
	 *
	 */
	private int noExactMatches = 0;

	/**
	 *
	 */
	private int multipleMatches = 0;

	/**
	 *
	 */
	private int noMatches = 0;
	/**
	 *
	 */
	private int singleMatches = 0;

	/**
	 * @param item the item being processed
	 */
	public void beforeProcess(final Taxon item) {

	}

	/**
	 * @param item the item being processed
	 * @param result the result of the processing
	 */
	public final void afterProcess(final Taxon item, final Result result) {
		switch(result.getStatus()) {
		case SINGLE_MATCH:
			singleMatches++;
			break;
		case NO_MATCH:
			noMatches++;
			break;
		case NO_EXACT_MATCH:
			noExactMatches++;
			break;
		case MULTIPLE_MATCHES:
			multipleMatches++;
			break;
		case CANNOT_PARSE:
			cannotParse++;
			break;
		default:
			break;
		}
	}

	/**
	 * @param item the item being processed
	 * @param e the exception thrown
	 */
	public void onProcessError(final Taxon item, final Exception e) {

	}

	/**
	 * @param writer Set the writer
	 * @throws IOException if there is a problem
	 */
	public final void writeFooter(final Writer writer) throws IOException {
		writer.write("\nSummary,\n");
		if (singleMatches > 0) {
			writer.write("Exact Match," + singleMatches + ",\n");
		}
		if (multipleMatches > 0) {
			writer.write("Multipe Exact Matches," + multipleMatches + ",\n");
		}
		if (noExactMatches > 0) {
			writer.write("Only Partial Matches," + noExactMatches + ",\n");
		}
		if (noMatches > 0) {
			writer.write("No Match," + noMatches + ",\n");
		}
		if (cannotParse > 0) {
			writer.write("Could not understand," + cannotParse + ",\n");
		}
	}

	/* (non-Javadoc)
	 * @see org.springframework.batch.core.StepExecutionListener#beforeStep(org.springframework.batch.core.StepExecution)
	 */
	@Override
	public void beforeStep(StepExecution stepExecution) {
		//Initialise totals
		singleMatches = 0;
		multipleMatches = 0;
		noExactMatches = 0;
		noMatches = 0;
		cannotParse = 0;
	}

	/* (non-Javadoc)
	 * @see org.springframework.batch.core.StepExecutionListener#afterStep(org.springframework.batch.core.StepExecution)
	 */
	@Override
	public ExitStatus afterStep(StepExecution stepExecution) {
		return stepExecution.getExitStatus();
	}

}