EDIT

// $Id$

/**

* Copyright (C) 2009 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.database.update;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.UUID;

import org.apache.log4j.Logger;

import eu.etaxonomy.cdm.common.CdmUtils;

import eu.etaxonomy.cdm.common.monitor.IProgressMonitor;

import eu.etaxonomy.cdm.database.ICdmDataSource;

/**

 * Class for updating term representations.

 * @author a.mueller

 * @date 27.09.2011

 *

 */

public class TermRepresentationUpdater extends SchemaUpdaterStepBase<TermRepresentationUpdater> implements ITermUpdaterStep{

	@SuppressWarnings("unused")

	private static final Logger logger = Logger.getLogger(TermRepresentationUpdater.class);

	public static final TermRepresentationUpdater NewInstance(String stepName, UUID uuidTerm, String description,  String label, String abbrev, UUID uuidLanguage){

		return new TermRepresentationUpdater(stepName, uuidTerm, description, label, abbrev, uuidLanguage, false);	

	}

	public static final TermRepresentationUpdater NewReverseInstance(String stepName, UUID uuidTerm, String description,  String label, String abbrev, UUID uuidLanguage){

		return new TermRepresentationUpdater(stepName, uuidTerm, description, label, abbrev, uuidLanguage, true);	

	}

	private UUID uuidTerm ;

	private String description;

	private String label;

	private String abbrev;

	private UUID uuidLanguage;

	private boolean isReverse = false;

	private TermRepresentationUpdater(String stepName, UUID uuidTerm, String description, String label, String abbrev, UUID uuidLanguage, boolean isReverse) {

		super(stepName);

		this.abbrev = abbrev;

		this.description = description;

		this.label = label;

		this.uuidTerm = uuidTerm;

		this.uuidLanguage = uuidLanguage;

		this.isReverse = isReverse;

	}

	public Integer invoke(ICdmDataSource datasource, IProgressMonitor monitor, CaseType caseType) throws SQLException{

		String sqlCheckTermExists = " SELECT count(*) as n FROM @@DefinedTermBase@@ WHERE uuid = '" + uuidTerm + "'";

		Long n = (Long)datasource.getSingleValue(caseType.replaceTableNames(sqlCheckTermExists));

		if (n == 0){

			String name = label != null ? label : abbrev != null ? abbrev : description;

			monitor.warning("Term for representations update does not exist. Term not updated: " + CdmUtils.Nz(name) + "(" + uuidTerm + ")");

			return null;

		}

		//language id

		Integer langId = null;

		if (uuidLanguage != null){

			langId = getLanguageId(uuidLanguage, datasource, monitor, caseType);

			if (langId == null){

				String warning = "Language for language uuid (%s) could not be found. Term representations not updated.";

				warning = String.format(warning, uuidLanguage.toString());

				monitor.warning(warning);

				return null;

			}

		}

		Integer repId = getRepresentationId(datasource, monitor, langId, caseType);

		if (repId == null){

			return null;

		}

		//standard representation

		String sqlUpdateRepresentationFormat = " UPDATE @@Representation@@ r SET %s = '%s' WHERE r.id = %d ";

		sqlUpdateRepresentationFormat = caseType.replaceTableNames(sqlUpdateRepresentationFormat);

		if (description != null){

			String sqlUpdateRepresentation = String.format(sqlUpdateRepresentationFormat, "text", description, repId);

			datasource.executeUpdate(sqlUpdateRepresentation);

		}

		if (label != null){

			String sqlUpdateRepresentation = String.format(sqlUpdateRepresentationFormat, "label", label, repId);

			datasource.executeUpdate(sqlUpdateRepresentation);

		}

		if (abbrev != null){

			String sqlUpdateRepresentation = String.format(sqlUpdateRepresentationFormat, "abbreviatedLabel", abbrev, repId);

			datasource.executeUpdate(sqlUpdateRepresentation);

		}

		return repId;

	}

	/**

	 * @param datasource

	 * @param monitor

	 * @param langId

	 * @param caseType 

	 * @return

	 * @throws SQLException

	 */

	private Integer getRepresentationId(ICdmDataSource datasource,

			IProgressMonitor monitor, Integer langId, CaseType caseType) throws SQLException {

		//representation

		String tableName = isReverse ? "RelationshipTermBase_inverseRepresentation" : "DefinedTermBase_Representation" ;

		String repIdFkCol = isReverse ? "inverserepresentations_id" : "representations_id";

		String sqlId = " SELECT rep.id " + 

			" FROM @@Representation@@ rep INNER JOIN %s MN ON MN.%s = rep.id " + 

			" INNER JOIN @@DefinedTermBase@@ dtb ON MN.DefinedTermBase_id = dtb.id " +

			" WHERE dtb.uuid = '%s' ";

		tableName = caseType.transformTo(tableName);

		sqlId = String.format(sqlId, tableName, repIdFkCol, uuidTerm.toString());

		sqlId = caseType.replaceTableNames(sqlId);

		if (uuidLanguage != null){

			sqlId += " AND rep.language_id = " + langId;

		}

		ResultSet rs = datasource.executeQuery(sqlId);

		Integer repId;

		if (rs.next()){

			repId = rs.getInt("id");

		}else{

			String warning = "No representations do exist yet. Can't update term representation for term '%s'!";

			warning = String.format(warning, uuidTerm.toString());

			monitor.warning(warning);

			repId = null;

		}

		return repId;

	}

}