EDIT

/**

* Copyright (C) 2007 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.io.pesi.erms;

import java.lang.reflect.Method;

import java.sql.ResultSet;

import java.sql.ResultSetMetaData;

import java.sql.SQLException;

import java.sql.Timestamp;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Map;

import java.util.Set;

import java.util.UUID;

import org.apache.commons.lang3.StringUtils;

import org.apache.log4j.Logger;

import org.joda.time.DateTime;

import eu.etaxonomy.cdm.common.CdmUtils;

import eu.etaxonomy.cdm.io.common.CdmImportBase;

import eu.etaxonomy.cdm.io.common.ICdmIO;

import eu.etaxonomy.cdm.io.common.IImportConfigurator.EDITOR;

import eu.etaxonomy.cdm.io.common.IPartitionedIO;

import eu.etaxonomy.cdm.io.common.ImportHelper;

import eu.etaxonomy.cdm.io.common.ResultSetPartitioner;

import eu.etaxonomy.cdm.io.common.Source;

import eu.etaxonomy.cdm.io.common.mapping.DbImportMapping;

import eu.etaxonomy.cdm.model.common.AnnotatableEntity;

import eu.etaxonomy.cdm.model.common.Annotation;

import eu.etaxonomy.cdm.model.common.AnnotationType;

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.cdm.model.common.ExtensionType;

import eu.etaxonomy.cdm.model.common.IdentifiableEntity;

import eu.etaxonomy.cdm.model.common.Language;

import eu.etaxonomy.cdm.model.common.MarkerType;

import eu.etaxonomy.cdm.model.permission.User;

/**

 * @author a.mueller

 * @since 20.03.2008

 */

public abstract class ErmsImportBase<CDM_BASE extends CdmBase>

             extends CdmImportBase<ErmsImportConfigurator, ErmsImportState>

             implements ICdmIO<ErmsImportState>, IPartitionedIO<ErmsImportState> {

    private static final long serialVersionUID = 3856605408484122428L;

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

	public static final UUID ID_IN_SOURCE_EXT_UUID = UUID.fromString("23dac094-e793-40a4-bad9-649fc4fcfd44");

	//NAMESPACES

	protected static final String AREA_NAMESPACE = "gu";

	protected static final String DR_NAMESPACE = "dr";

	protected static final String IMAGE_NAMESPACE = "Images";

	protected static final String LINKS_NAMESPACE = "Links";

	protected static final String NOTES_NAMESPACE = "Notes";

	protected static final String LANGUAGE_NAMESPACE = "Language";

	protected static final String REFERENCE_NAMESPACE = "Source";

	protected static final String SOURCEUSE_NAMESPACE = "tu_sources";

	protected static final String TAXON_NAMESPACE = "Taxon";

	protected static final String NAME_NAMESPACE = "TaxonName";

	protected static final String VERNACULAR_NAMESPACE = "Vernaculars";

	protected static final String FEATURE_NAMESPACE = "note.type";

	protected static final String EXTENSION_TYPE_NAMESPACE = "ExtensionType";

	private String pluralString;

	private String dbTableName;

	//TODO needed?

	private Class cdmTargetClass;

	public ErmsImportBase(String pluralString, String dbTableName, Class cdmTargetClass) {

		this.pluralString = pluralString;

		this.dbTableName = dbTableName;

		this.cdmTargetClass = cdmTargetClass;

	}

	@Override

    protected void doInvoke(ErmsImportState state){

		logger.info("start make " + getPluralString() + " ...");

		ErmsImportConfigurator config = state.getConfig();

		Source source = config.getSource();

		String strIdQuery = getIdQuery();

		String strRecordQuery = getRecordQuery(config);

		int recordsPerTransaction = config.getRecordsPerTransaction();

		recordsPerTransaction = recordsPerTransaction / divideCountBy();

		try{

			ResultSetPartitioner<ErmsImportState> partitioner = ResultSetPartitioner.NewInstance(source, strIdQuery, strRecordQuery, recordsPerTransaction);

			while (partitioner.nextPartition()){

				partitioner.doPartition(this, state);

			}

		} catch (SQLException e) {

			logger.error("SQLException:" +  e);

			state.setUnsuccessfull();

			return;

		}

		logger.info("end make " + getPluralString() + " ... " + getSuccessString(true));

		return;

	}

	@Override

    public boolean doPartition(@SuppressWarnings("rawtypes") ResultSetPartitioner partitioner, ErmsImportState state) {

		boolean success = true ;

		Set<CdmBase> objectsToSave = new HashSet<>();

 		DbImportMapping<?, ?> mapping = getMapping();

		mapping.initialize(state, cdmTargetClass);

		ResultSet rs = partitioner.getResultSet();

		try{

			while (rs.next()){

			    if (!ignoreRecord(rs)) {

                    success &= mapping.invoke(rs, objectsToSave);

                }

			}

		} catch (SQLException e) {

			logger.error("SQLException:" +  e);

			return false;

		}

		partitioner.startDoSave();

		getCommonService().save(objectsToSave);

		return success;

	}

    /**

     * Returns <code>true</code> if the current

     * record should be ignored. Should be overriden

     * if a subclass does not want to handle all records.

     * This is primarily important for those subclasses

     * handling last action information which create multiple

     * records per base record.

     * @throws SQLException

     */

    protected boolean ignoreRecord(@SuppressWarnings("unused") ResultSet rs) throws SQLException {

        return false;

    }

    protected abstract DbImportMapping<?, ?> getMapping();

	protected abstract String getRecordQuery(ErmsImportConfigurator config);

	protected String getIdQuery(){

		String result = " SELECT id FROM " + getTableName();

		return result;

	}

	@Override

    public String getPluralString(){

		return pluralString;

	}

	protected String getTableName(){

		return this.dbTableName;

	}

	protected boolean doIdCreatedUpdatedNotes(ErmsImportState state, IdentifiableEntity identifiableEntity, ResultSet rs, long id, String namespace)

			throws SQLException{

		boolean success = true;

		//id

		success &= ImportHelper.setOriginalSource(identifiableEntity, state.getConfig().getSourceReference(), id, namespace);

		//createdUpdateNotes

		success &= doCreatedUpdatedNotes(state, identifiableEntity, rs, namespace);

		return success;

	}

	protected boolean doCreatedUpdatedNotes(ErmsImportState state, AnnotatableEntity annotatableEntity, ResultSet rs, String namespace)

			throws SQLException{

		ErmsImportConfigurator config = state.getConfig();

		Object createdWhen = rs.getObject("Created_When");

		String createdWho = rs.getString("Created_Who");

		Object updatedWhen = null;

		String updatedWho = null;

		try {

			updatedWhen = rs.getObject("Updated_When");

			updatedWho = rs.getString("Updated_who");

		} catch (SQLException e) {

			//Table "Name" has no updated when/who

		}

		String notes = rs.getString("notes");

		boolean success  = true;

		//Created When, Who, Updated When Who

		if (config.getEditor() == null || config.getEditor().equals(EDITOR.NO_EDITORS)){

			//do nothing

		}else if (config.getEditor().equals(EDITOR.EDITOR_AS_ANNOTATION)){

			String createdAnnotationString = "Berlin Model record was created By: " + String.valueOf(createdWho) + " (" + String.valueOf(createdWhen) + ") ";

			if (updatedWhen != null && updatedWho != null){

				createdAnnotationString += " and updated By: " + String.valueOf(updatedWho) + " (" + String.valueOf(updatedWhen) + ")";

			}

			Annotation annotation = Annotation.NewInstance(createdAnnotationString, Language.DEFAULT());

			annotation.setCommentator(config.getCommentator());

			annotation.setAnnotationType(AnnotationType.TECHNICAL());

			annotatableEntity.addAnnotation(annotation);

		}else if (config.getEditor().equals(EDITOR.EDITOR_AS_EDITOR)){

			User creator = getUser(createdWho, state);

			User updator = getUser(updatedWho, state);

			DateTime created = getDateTime(createdWhen);

			DateTime updated = getDateTime(updatedWhen);

			annotatableEntity.setCreatedBy(creator);

			annotatableEntity.setUpdatedBy(updator);

			annotatableEntity.setCreated(created);

			annotatableEntity.setUpdated(updated);

		}else {

			logger.warn("Editor type not yet implemented: " + config.getEditor());

		}

		//notes

		if (StringUtils.isNotBlank(notes)){

			String notesString = String.valueOf(notes);

			if (notesString.length() > 65530 ){

				notesString = notesString.substring(0, 65530) + "...";

				logger.warn("Notes string is longer than 65530 and was truncated: " + annotatableEntity);

			}

			Annotation notesAnnotation = Annotation.NewInstance(notesString, null);

			//notesAnnotation.setAnnotationType(AnnotationType.EDITORIAL());

			//notes.setCommentator(bmiConfig.getCommentator());

			annotatableEntity.addAnnotation(notesAnnotation);

		}

		return success;

	}

	private User getUser(String userString, ErmsImportState state){

		if (StringUtils.isBlank(userString)){

			return null;

		}

		userString = userString.trim();

		User user = state.getUser(userString);

		if (user == null){

			user = getTransformedUser(userString,state);

		}

		if (user == null){

			user = makeNewUser(userString, state);

		}

		if (user == null){

			logger.warn("User is null");

		}

		return user;

	}

	private User getTransformedUser(String userString, ErmsImportState state){

		Method method = state.getConfig().getUserTransformationMethod();

		if (method == null){

			return null;

		}

		try {

			userString = (String)state.getConfig().getUserTransformationMethod().invoke(null, userString);

		} catch (Exception e) {

			logger.warn("Error when trying to transform userString " +  userString + ". No transformation done.");

		}

		User user = state.getUser(userString);

		return user;

	}

	private User makeNewUser(String userString, ErmsImportState state){

		String pwd = getPassword();

		User user = User.NewInstance(userString, pwd);

		state.putUser(userString, user);

		getUserService().save(user);

		logger.info("Added new user: " + userString);

		return user;

	}

	private String getPassword(){

		String result = UUID.randomUUID().toString();

		return result;

	}

	private DateTime getDateTime(Object timeString){

		if (timeString == null){

			return null;

		}

		DateTime dateTime = null;

		if (timeString instanceof Timestamp){

			Timestamp timestamp = (Timestamp)timeString;

			dateTime = new DateTime(timestamp);

		}else{

			logger.warn("time ("+timeString+") is not a timestamp. Datetime set to current date. ");

			dateTime = new DateTime();

		}

		return dateTime;

	}

	protected boolean resultSetHasColumn(ResultSet rs, String columnName){

		try {

			ResultSetMetaData metaData = rs.getMetaData();

			for (int i = 0; i < metaData.getColumnCount(); i++){

				if (metaData.getColumnName(i + 1).equalsIgnoreCase(columnName)){

					return true;

				}

			}

			return false;

		} catch (SQLException e) {

            logger.warn("Exception in resultSetHasColumn");

            return false;

		}

	}

	protected boolean checkSqlServerColumnExists(Source source, String tableName, String columnName){

		String strQuery = "SELECT  Count(t.id) as n " +

				" FROM sysobjects AS t " +

				" INNER JOIN syscolumns AS c ON t.id = c.id " +

				" WHERE (t.xtype = 'U') AND " +

				" (t.name = '" + tableName + "') AND " +

				" (c.name = '" + columnName + "')";

		ResultSet rs = source.getResultSet(strQuery) ;

		int n;

		try {

			rs.next();

			n = rs.getInt("n");

			return n>0;

		} catch (SQLException e) {

			e.printStackTrace();

			return false;

		}

	}

	/**

	 * Returns a map that holds all values of a ResultSet. This is needed if a value needs to

	 * be accessed twice

	 */

	protected Map<String, Object> getValueMap(ResultSet rs) throws SQLException{

		try{

			Map<String, Object> valueMap = new HashMap<>();

			int colCount = rs.getMetaData().getColumnCount();

			for (int c = 0; c < colCount ; c++){

				Object value = rs.getObject(c+1);

				String label = rs.getMetaData().getColumnLabel(c+1).toLowerCase();

				if (value != null && ! CdmUtils.Nz(value.toString()).trim().equals("")){

					valueMap.put(label, value);

				}

			}

			return valueMap;

		}catch(SQLException e){

			throw e;

		}

	}

	protected ExtensionType getExtensionType(UUID uuid, String label, String text, String labelAbbrev){

		ExtensionType extensionType = (ExtensionType)getTermService().find(uuid);

		if (extensionType == null){

			extensionType = ExtensionType.NewInstance(text, label, labelAbbrev);

			extensionType.setUuid(uuid);

			getTermService().save(extensionType);

		}

		return extensionType;

	}

	protected MarkerType getMarkerType(UUID uuid, String label, String text, String labelAbbrev){

		MarkerType markerType = (MarkerType)getTermService().find(uuid);

		if (markerType == null){

			markerType = MarkerType.NewInstance(label, text, labelAbbrev);

			markerType.setUuid(uuid);

			getTermService().save(markerType);

		}

		return markerType;

	}

    protected AnnotationType getAnnotationType(UUID uuid, String label, String text, String labelAbbrev){

        AnnotationType annotationType = (AnnotationType)getTermService().find(uuid);

        if (annotationType == null){

            annotationType = AnnotationType.NewInstance(label, text, labelAbbrev);

            annotationType.setUuid(uuid);

            getTermService().save(annotationType);

        }

        return annotationType;

    }

	/**

	 * Reads a foreign key field from the result set and adds its value to the idSet.

	 */

	protected void handleForeignKey(ResultSet rs, Set<String> idSet, String attributeName)

			throws SQLException {

		Object idObj = rs.getObject(attributeName);

		if (idObj != null){

			String id  = String.valueOf(idObj);

			idSet.add(id);

		}

	}

	protected int divideCountBy() { return 1;}

	/**

	 * Returns true if i is a multiple of recordsPerTransaction

	 */

	protected boolean loopNeedsHandling(int i, int recordsPerLoop) {

		startTransaction();

		return (i % recordsPerLoop) == 0;

	}

	protected void doLogPerLoop(int count, int recordsPerLog, String pluralString){

		if ((count % recordsPerLog ) == 0 && count!= 0 ){ logger.info(pluralString + " handled: " + (count));}

	}

}