package fr.ifremer.quadrige2.synchro.intercept.data;
   
   /*-
    * #%L
    * Quadrige2 Core :: Quadrige2 Synchro Core
    * $Id:$
    * $HeadURL:$
    * %%
    * Copyright (C) 2017 Ifremer
   * %%
   * This program 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.
   * 
   * This program 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 General Public License for more details.
   * 
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   * #L%
   */
  
  import com.google.common.eventbus.Subscribe;
  import fr.ifremer.common.synchro.meta.SynchroDatabaseMetadata;
  import fr.ifremer.common.synchro.meta.SynchroTableMetadata;
  import fr.ifremer.common.synchro.meta.event.LoadTableEvent;
  import fr.ifremer.quadrige2.synchro.intercept.data.internal.ConvertSdo2WktGeometryInterceptor;
  import fr.ifremer.quadrige2.synchro.intercept.data.internal.ConvertWkt2SdoGeometryInterceptor;
  import fr.ifremer.quadrige2.synchro.service.SynchroDirection;
  import org.hibernate.tool.hbm2ddl.TableMetadata;
  
  /**
   * Manage geometry columns rewriting
   * 
   * @author Benoit Lavenier <benoit.lavenier@e-is.pro>
   * @since 1.0
   */
  public class GeometryTablesInterceptor extends AbstractDataInterceptor {
  
  	/**
  	 * <p>
  	 * Constructor for GeometryTablesInterceptor.
  	 * </p>
  	 */
  	public GeometryTablesInterceptor() {
  		// Enable only when using a server (e.g. Oracle)
  		super(SynchroDirection.IMPORT_SERVER2TEMP,
  				SynchroDirection.EXPORT_TEMP2SERVER);
  	}
  
  	/** {@inheritDoc} */
  	@Override
  	public boolean doApply(SynchroDatabaseMetadata meta, TableMetadata table) {
  		String tableName = table.getName();
  		return tableName.endsWith("_AREA")
  				|| tableName.endsWith("_LINE")
  				|| tableName.endsWith("_POINT");
  	}
  
  	/**
  	 * <p>
  	 * handleLoadTable.
  	 * </p>
  	 * 
  	 * @param e
  	 *            a {@link fr.ifremer.common.synchro.meta.event.LoadTableEvent} object.
  	 */
  	@Subscribe
  	public void handleLoadTable(LoadTableEvent e) {
  
  		SynchroTableMetadata table = e.table;
  		SynchroDirection direction = getConfig().getDirection();
  		int columnPositionIndex = getPositionColumnIndex(table);
  		if (columnPositionIndex == -1) {
  			return;
  		}
  
  		if (direction == SynchroDirection.IMPORT_SERVER2TEMP) {
  
  			// Add a converter (from SDO_GEOMETRY to WKT string)
  			ConvertSdo2WktGeometryInterceptor sdoGeometryInterceptor = new ConvertSdo2WktGeometryInterceptor(columnPositionIndex);
  			table.addInterceptor(sdoGeometryInterceptor);
  		}
  		else if (direction == SynchroDirection.EXPORT_TEMP2SERVER) {
  
  			// Add a converter (from WKT to SDO_GEOMETRY)
  			ConvertWkt2SdoGeometryInterceptor sdoGeometryInterceptor = new ConvertWkt2SdoGeometryInterceptor(columnPositionIndex);
  			table.addInterceptor(sdoGeometryInterceptor);
  		}
  	}
  
  	/* -- Internal methods -- */
  
  	private int getPositionColumnIndex(SynchroTableMetadata table) {
  		for (String columnName : table.getColumnNames()) {
  			if (columnName.endsWith("_position")) {
 				return table.getColumnIndex(columnName);
 			}
 		}
 		return -1;
 	}
 }