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/**
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 *
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 */
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package com.iver.cit.gvsig.fmap.edition;
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import java.awt.geom.Rectangle2D;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Hashtable;
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import java.util.List;
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import com.hardcode.driverManager.Driver;
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import com.iver.cit.gvsig.fmap.DriverException;
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import com.iver.cit.gvsig.fmap.DriverIOExceptionType;
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import com.iver.cit.gvsig.fmap.core.IFeature;
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import com.iver.cit.gvsig.fmap.core.IRow;
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import com.iver.cit.gvsig.fmap.core.v02.FConverter;
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import com.iver.cit.gvsig.fmap.drivers.DBLayerDefinition;
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import com.iver.cit.gvsig.fmap.drivers.DriverIOException;
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import com.iver.cit.gvsig.fmap.drivers.IFeatureIterator;
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import com.iver.cit.gvsig.fmap.drivers.VectorialDatabaseDriver;
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import com.iver.cit.gvsig.fmap.layers.ISpatialDB;
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import com.iver.cit.gvsig.fmap.layers.VectorialDBAdapter;
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import com.vividsolutions.jts.geom.Envelope;
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import com.vividsolutions.jts.index.quadtree.Quadtree;
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/**
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 * @author fjp
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 *
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 */
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public class VectorialEditableDBAdapter extends VectorialEditableAdapter
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                implements ISpatialDB {
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        private class MyIterator implements IFeatureIterator {
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                private Rectangle2D extent = null;
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                private VectorialDBAdapter orig;
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                private IFeature feat;
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                private IFeatureIterator featIt;
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                private String epsg;
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                private VectorialDatabaseDriver dbDriver;
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                Hashtable alreadyDone = new Hashtable();
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                private int idFromExpansion = 0;
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                private List listFromExpansion;
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                private boolean bOriginalCursorOpened = true;
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                public MyIterator(Rectangle2D r, String strEPSG) throws DriverException {
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                        extent = r;
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                        epsg = strEPSG;
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                        orig = (VectorialDBAdapter) ova;
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                        featIt = orig.getFeatureIterator(extent, epsg);
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                        dbDriver = (VectorialDatabaseDriver) getOriginalDriver();
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                        getFeaturesFromExpansionFile();
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                }
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                public boolean hasNext() throws DriverException {
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                        feat = null;
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                        int calculatedIndex = -1;
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                        if (bOriginalCursorOpened) // Si hay originales (Es porque si se ha
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                                                                                // llegado al final, se cierra el
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                                                                                // iterador y salta un fallo
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                        {
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                                bOriginalCursorOpened = featIt.hasNext();
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                                if (bOriginalCursorOpened) {
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                                        feat = featIt.next();
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                                        int originalIndex = dbDriver.getRowIndexByFID(feat);
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                                        // Iteramos hasta que encontremos alguno no borrado.
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                                        // Aqu? suponemos que el orden es el original. Si no, no funcionar?.
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                                        if (delRows.get(originalIndex)) // Si est? borrado
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                                        {
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                                                feat = null;
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                                                boolean bFound = false;
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                                                while (featIt.hasNext())
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                                                {
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                                                        feat = featIt.next();
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                                                        originalIndex = dbDriver.getRowIndexByFID(feat);
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                                                        // calculatedIndex = getCalculatedIndex(originalIndex);
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                                                        if (delRows.get(originalIndex) == false) // Si NO est? borrado
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                                                        {
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                                                                bFound = true;
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                                                                break;
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                                                        }
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                                                }
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                                                if (bFound == false) // Todos los ?ltimos est?n borrados.
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                                                {
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                                                        bOriginalCursorOpened = false; // para que busque en el fichero de expansi?n
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                                                        feat = null;
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                                                }
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                                        } // if delRows
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                                        if (bOriginalCursorOpened) // Si todav?a quedan features por leer, y no est?n borradas
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                                        {
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                                                calculatedIndex = originalIndex; //getCalculatedIndex(originalIndex);
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                                                Integer integer = new Integer(calculatedIndex);
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                                                if (!relations.containsKey(integer)) { // Si no est? en el
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                                                                                                                                // fichero de
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                                                                                                                                // expansi?n
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                                                        alreadyDone.put(integer, feat);
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                                                } else { // Si est? en el fichero de expansi?n
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                                                        int num = ((Integer) relations.get(integer)).intValue();
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                                                        IRowEdited auxR;
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                                                        try {
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                                                                auxR = expansionFile.getRow(num);
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                                                                feat = (IFeature) auxR.getLinkedRow().cloneRow();
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                                                                // feat = (IFeature) auxR.getLinkedRow();
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                                                                alreadyDone.put(integer, feat);
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                                                        } catch (IOException e) {
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                                                                DriverIOExceptionType type =
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                                                                        new DriverIOExceptionType();
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                                                                type.setDriverName(getDriver().getName());
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                                                                throw new DriverException(e, type);
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                                                        }
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                                                } // else
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                                        } // if tercer bOriginalCursorOpened
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                                } // if segundo bOriginalCursorOpened
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                        } // if primer bOriginalCursorOpened
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                        if (!bOriginalCursorOpened) {
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                                // Si ya no hay m?s de las originales, todav?a tenemos
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                                // que revisar las a?adidas que hay en el fichero
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                                // de expansi?n
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                                try {
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                                        while ((idFromExpansion < expansionFile.getSize()) && (feat == null))
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                                        {
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                                                IRowEdited rowEd = expansionFile.getRow(idFromExpansion);
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                                                IFeature aux = (IFeature) rowEd.getLinkedRow();
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                                                Integer calculated = (Integer) mapFID2index.get(aux.getID());
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                                                calculatedIndex = calculated.intValue();
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                                                System.out.println("El elemento idFromExpansion = " + idFromExpansion + " es " + aux.getID());
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                                                // Revisamos los borrados
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                                                if (delRows.get(calculatedIndex) == true)
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                                                {
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                                                        boolean bFound = false;
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                                                        while ((!bFound) && (idFromExpansion < expansionFile.getSize()-1))
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                                                        {
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                                                                // calculatedIndex++;
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                                                                idFromExpansion++;
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                                                                rowEd = expansionFile.getRow(idFromExpansion);
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                                                                aux = (IFeature) rowEd.getLinkedRow();
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                                                                Integer auxCalculated = (Integer) mapFID2index.get(aux.getID());
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                                                                calculatedIndex = auxCalculated.intValue();
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                                                                // Si no est? borrado y es una entidad v?lida, que est? siendo usada (no es algo que est? en el expansionFile sin usarse)
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                                                                if ((delRows.get(calculatedIndex) == false) && (relations.containsKey(auxCalculated)))
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                                                                {
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                                                                        bFound = true;
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                                                                        calculated = auxCalculated;
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                                                                        break;
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                                                                }
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                                                                else
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                                                                {
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                                                                        System.out.println("El elemento idFromExpansion = " + idFromExpansion + " est? borrado");
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                                                                }
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                                                        }
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                                                        if (bFound)
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                                                        {
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                                                                calculated = new Integer(calculatedIndex);
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                                                                rowEd = expansionFile.getRow(idFromExpansion);
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                                                                aux = (IFeature) rowEd.getLinkedRow();
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                                                        }
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                                                        else
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                                                        {
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                                                                return false; // El resto est?n borrados
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                                                        }
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                                                } // if primer borrado
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                                                if (relations.containsKey(calculated))
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                                                {
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                                                        Integer realExpansionIndex = (Integer) relations.get(calculated);
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                                                        if (realExpansionIndex.intValue() == idFromExpansion)
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                                                        {
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                                                                feat = (IFeature) aux.cloneRow();
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                                                        }
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                                                }
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                                                idFromExpansion++;
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                                        }
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                                } catch (IOException e) {
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                                        throw new DriverException(e);
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                                }
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                        }
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                        if (calculatedIndex == -1)
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                                return false;
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                        else {
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                                if (feat == null)
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                                {
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                                        if (idFromExpansion == expansionFile.getSize())
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                                                return false;
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                                        else
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                                                System.err.println("ERROR DE ENTREGA DE FEATURE EN hasNext del Iterador");
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                                }
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                                /* if (delRows.get(calculatedIndex))
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                                        feat = null; */
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                                return true;
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                        }
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                }
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                public IFeature next() throws DriverException {
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                        return feat;
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                }
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                public void closeIterator() throws DriverException {
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                        // TODO Auto-generated method stub
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                }
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                private void getFeaturesFromExpansionFile() {
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                        Envelope e = FConverter.convertRectangle2DtoEnvelope(extent);
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                        listFromExpansion = index.query(e);
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                }
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        }
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        private Hashtable mapFID2index = new Hashtable();
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        private Hashtable mapIndex2FID = new Hashtable();
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        /**
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         *
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         */
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        public VectorialEditableDBAdapter() {
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                super();
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        }
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        /*
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         * (non-Javadoc)
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         *
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         * @see com.iver.cit.gvsig.fmap.edition.VectorialEditableAdapter#getFeatures(java.awt.geom.Rectangle2D,
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         *      java.lang.String)
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         */
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        public IRowEdited[] getFeatures(Rectangle2D r, String strEPSG)
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                        throws DriverException {
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                ArrayList aux = new ArrayList();
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                IFeatureIterator featIt = getFeatureIterator(r, strEPSG, null);
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                int numEntities = 0;
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                while (featIt.hasNext()) {
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                        IFeature feat = featIt.next();
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                        // TODO:
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                        assert(feat !=null);
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                        int index = getRowIndexByFID(feat);
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                        IRowEdited edRow = new DefaultRowEdited(feat, IRowEdited.STATUS_ORIGINAL, index);
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                        aux.add(edRow);
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                        numEntities++;
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                }
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                return (IRowEdited[]) aux.toArray(new IRowEdited[0]);
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                // return (IFeature[]) aux.toArray(new IFeature[0]);
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        }
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        /*
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         * (non-Javadoc)
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         *
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         * @see com.iver.cit.gvsig.fmap.edition.VectorialEditableAdapter#startEdition()
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         */
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        public void startEdition(int sourceType) throws EditionException {
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                isEditing = true;
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                Driver drv = ova.getDriver();
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                if (drv instanceof IWriteable)
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                {
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                        setWriter(((IWriteable) drv).getWriter());
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                }
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                try {
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                        expansionFile.open();
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                        // TODO: Si la capa dispone de un ?ndice espacial, hacer
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                        // algo aqu? para que se use ese ?ndice espacial.
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                        index = new Quadtree();
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                        // No metemos ninguna entidad de las originales dentro
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                        // de la base de datos porque esa consulta ya la
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                        // hace getFeatures sin tener en cuenta el ?ndice local.
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                        // TODO: URGENTE !!!!!
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                        // PONER ALGO EN LAS DRIVERS DE BASE DE DATOS PARA QUE
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                        // ESTO SEA R?PIDO!!! No podemos pedir TOOOOOODAS las features
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                        // para hacer un ?ndice que YA EXISTE dentro del VectorialDriver!!.
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                         for (int i = 0; i < ova.getShapeCount(); i++)
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                         {
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                                 IFeature feat = ova.getFeature(i);
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                                 Integer calculatedIndex = new Integer(i);
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                                 mapFID2index.put(feat.getID(), calculatedIndex);
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                                 mapIndex2FID.put(calculatedIndex, feat.getID());
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                         }
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                        /*
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                         * for (int i = 0; i < ova.getShapeCount(); i++) { IGeometry g=null;
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                         * try { g = ((DefaultFeature) ova.getFeature(i)).getGeometry(); }
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                         * catch (DriverException e1) { // TODO Auto-generated catch block
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                         * e1.printStackTrace(); }
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                         *
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                         * if (g == null) { continue; }
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                         *
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                         * Rectangle2D r = g.getBounds2D(); Envelope e = new
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                         * Envelope(r.getX(), r.getX() + r.getWidth(), r.getY(), r.getY() +
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                         * r.getHeight()); index.insert(e, new Integer(i)); } } catch
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                         * (DriverIOException e) { throw new EditionException(e);
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                         */
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                } catch (IOException e) {
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                        throw new EditionException(e);
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                } catch (DriverIOException e) {
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                        throw new EditionException(e);
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                } catch (DriverException e) {
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                        throw new EditionException(e);
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                }
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                System.err.println("Se han metido en el ?ndice "
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                                + index.queryAll().size() + " geometr?as");
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        }
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        public IFeatureIterator getFeatureIterator(Rectangle2D r, String strEPSG)
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                        throws DriverException {
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                return new MyIterator(r, strEPSG);
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        }
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        public IFeatureIterator getFeatureIterator(Rectangle2D r, String strEPSG,
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                        String[] alphaNumericFieldsNeeded) throws DriverException {
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                return new MyIterator(r, strEPSG);
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        }
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        public DBLayerDefinition getLyrDef() {
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                VectorialDBAdapter orig = (VectorialDBAdapter) ova;
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                return orig.getLyrDef();
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        }
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        public int getRowIndexByFID(IFeature feat) {
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                Integer calculatedIndex = (Integer) mapFID2index.get(feat.getID());
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                return getInversedIndex(calculatedIndex.intValue());
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        }
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        /* (non-Javadoc)
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         * @see com.iver.cit.gvsig.fmap.edition.VectorialEditableAdapter#doAddRow(com.iver.cit.gvsig.fmap.core.IRow)
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         */
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        public int doAddRow(IRow feat, int sourceType) throws DriverIOException, IOException {
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                int calculatedIndex = super.doAddRow(feat, sourceType);
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                // Integer posInExpansionFile = (Integer) relations.get(new Integer(calculatedIndex));
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                Integer virtual = new Integer(calculatedIndex); // calculatedIndex es igual al numero de shapes originales + el numero de entidades a?adidas.
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                                        // es decir, virtual es el calculatedIndex (no tiene en cuenta los borrados)
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                                        // calculatedIndex = indiceExterno + borrados hasta ese punto.
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                mapFID2index.put(feat.getID(), virtual);
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                mapIndex2FID.put(virtual, feat.getID());
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                return calculatedIndex;
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        }
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        /* (non-Javadoc)
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         * @see com.iver.cit.gvsig.fmap.edition.VectorialEditableAdapter#doModifyRow(int, com.iver.cit.gvsig.fmap.core.IRow)
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         */
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        public int doModifyRow(int calculatedIndex, IRow feat,int sourceType) throws IOException, DriverIOException {
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                int posAnteriorInExpansionFile = super.doModifyRow(calculatedIndex, feat, sourceType); // devolver? -1 si es original
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                // No hacemos nada con las modificaciones sobre los ?ndices.
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                // Suponiendo que feat tenga la misma ID que la que hab?a antes.
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                Integer virtual = new Integer(calculatedIndex);
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                String theIDoriginal = (String) mapIndex2FID.get(virtual);
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                if (!theIDoriginal.equals(feat.getID()))
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                {
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                        AssertionError err = new AssertionError("Fallo al modificar la fila. ID viejo=" + theIDoriginal + " ID nuevo = " + feat.getID());
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                        err.printStackTrace();
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                }
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                // hashFIDtoExpansionFile.put(feat.getID(), new Integer(posInExpansionFile));
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                mapFID2index.put(feat.getID(), virtual);
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                mapIndex2FID.put(virtual, feat.getID());
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                return posAnteriorInExpansionFile;
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        }
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        /* (non-Javadoc)
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         * @see com.iver.cit.gvsig.fmap.edition.VectorialEditableAdapter#doRemoveRow(int)
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         */
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        public IRow doRemoveRow(int index,int sourceType) throws DriverIOException, IOException {
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                // Le entra un calculatedIndex, as? que delRows tiene guardados
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                // los ?ndices internos, no los externos.
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                IFeature deletedFeat = (IFeature) super.doRemoveRow(index, sourceType);
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                // Lo borramos de hashFIDtoExpansionFile
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                // hashFIDtoExpansionFile.remove(deletedFeat.getID());
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                return deletedFeat;
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        }
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        /* (non-Javadoc)
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         * @see com.iver.cit.gvsig.fmap.edition.VectorialEditableAdapter#undoAddRow(int)
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         */
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        public void undoAddRow(int calculatedIndex, int sourceType) throws DriverIOException, IOException {
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                // TODO Auto-generated method stub
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                super.undoAddRow(calculatedIndex,sourceType);
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                Integer calculated = new Integer(calculatedIndex);
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                String theID = (String) mapIndex2FID.get(calculated);
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                mapFID2index.remove(calculated);
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                mapIndex2FID.remove(theID);
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        }
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        public void cancelEdition(int sourceType) throws IOException {
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                super.cancelEdition(sourceType);
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                mapFID2index.clear();
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                mapIndex2FID.clear();
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        }
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        public void stopEdition(IWriter writer, int sourceType) throws EditionException {
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                super.stopEdition(writer, sourceType);
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                mapFID2index.clear();
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                mapIndex2FID.clear();
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        }
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}