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/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * 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 General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

package org.gvsig.annotation.impl;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.annotation.AnnotationCreationException;

import org.gvsig.annotation.AnnotationCreationFinishAction;

import org.gvsig.annotation.AnnotationCreationService;

import org.gvsig.annotation.AnnotationDataTypes;

import org.gvsig.annotation.AnnotationManager;

import org.gvsig.annotation.calculator.AnnotationPositionCalculationException;

import org.gvsig.annotation.calculator.AnnotationPositionCalculator;

import org.gvsig.annotation.calculator.AnnotationPositionCalculatorCreationException;

import org.gvsig.fmap.dal.DALLocator;

import org.gvsig.fmap.dal.DataManager;

import org.gvsig.fmap.dal.DataTypes;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.exception.InitializeException;

import org.gvsig.fmap.dal.exception.ProviderNotRegisteredException;

import org.gvsig.fmap.dal.exception.ValidateDataParametersException;

import org.gvsig.fmap.dal.feature.EditableFeature;

import org.gvsig.fmap.dal.feature.EditableFeatureAttributeDescriptor;

import org.gvsig.fmap.dal.feature.EditableFeatureType;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.FeatureAttributeDescriptor;

import org.gvsig.fmap.dal.feature.FeatureSet;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.dal.feature.NewFeatureStoreParameters;

import org.gvsig.fmap.dal.serverexplorer.filesystem.FilesystemServerExplorer;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.tools.dispose.DisposableIterator;

import org.gvsig.tools.dynobject.exception.DynFieldNotFoundException;

import org.gvsig.tools.task.AbstractMonitorableTask;

/**

 * Default {@link AnnotationCreationService} implementation.

 * 

 * @author gvSIG Team

 * @version $Id$

 */

public class DefaultAnnotationCreationService extends AbstractMonitorableTask implements AnnotationCreationService {

        private static final Logger LOG = LoggerFactory.getLogger(DefaultAnnotationCreationService.class);

        private static DataManager dataManager = DALLocator.getDataManager();

        private AnnotationManager manager;

        private FeatureStore sourceStore;

        private int sourceFontTypeAttribute = -1;

        private int sourceFontStyleAttribute = -1;

        private int sourceFontColorAttribute = -1;

        private int sourceRotationAttribute = -1;

        private int sourceHeigthAttribute = -1;

        private AnnotationPositionCalculator annotationPositionCalculator = null;

        private String destinationGeometryAttributeName = null;

        private AnnotationCreationFinishAction annotationCreationFinishAction = null; 

        /**

         * {@link DefaultAnnotationCreationService} constructor with a

         * {@link AnnotationManager}.

         * 

         * @param manager

         *            to use in the service

         * @throws DataException 

         */

        public DefaultAnnotationCreationService(FeatureStore featureStore, AnnotationManager manager) throws DataException {

                super("annotation");

            this.sourceStore = featureStore; 

                this.manager = manager;

                destinationGeometryAttributeName = featureStore.getDefaultFeatureType().getDefaultGeometryAttributeName();

        }

        public AnnotationManager getManager() {

                return this.manager;

        }

        public FeatureStore createAnnotationStore(String destinationShapeFile, int textValueAttribute)

        throws AnnotationCreationException {                

                try {

                        if (destinationShapeFile == null){

                                throw new AnnotationCreationException("File can not be null");

                        }        

                        String destinationShapeFileWithoutExtension = destinationShapeFile.toLowerCase().replaceAll("\\.shp", "");

                        if (destinationShapeFileWithoutExtension.length() == destinationShapeFile.length()-4){

                                destinationShapeFileWithoutExtension =  destinationShapeFile.substring(0, destinationShapeFile.length()-4);

                        }else{

                                destinationShapeFileWithoutExtension = destinationShapeFile;

                        }                        

                        NewFeatureStoreParameters newFeatureStoreParameters = (NewFeatureStoreParameters)dataManager.createNewStoreParameters("FilesystemExplorer", "Shape");

                        newFeatureStoreParameters.setDynValue("shpfile", destinationShapeFileWithoutExtension + ".shp");

                        newFeatureStoreParameters.setDynValue("dbffile", destinationShapeFileWithoutExtension + ".dbf");

                        newFeatureStoreParameters.setDynValue("shxfile", destinationShapeFileWithoutExtension + ".shx");

                        newFeatureStoreParameters.setDynValue("crs", sourceStore.getDefaultFeatureType().getDefaultSRS());

                        EditableFeatureType editableFeatureType = sourceStore.getDefaultFeatureType().getEditable();//newFeatureStoreParameters.getDefaultFeatureType().getEditable();

                        FeatureAttributeDescriptor[] featureAttributeDescriptors = editableFeatureType.getAttributeDescriptors();

                        for (int i=featureAttributeDescriptors.length-1  ; i>=0 ; i--){

                                editableFeatureType.remove(i);

                        }

                        initializeFeatureType(editableFeatureType);

                        newFeatureStoreParameters.setDefaultFeatureType(editableFeatureType);

                        dataManager.newStore("FilesystemExplorer", "Shape", newFeatureStoreParameters, true);

                        //If there is not an annotationPositionCalculator it gets the default 

                        if (annotationPositionCalculator == null){

                                annotationPositionCalculator = manager.getDefaultAnnotationPositionCalculator();

                        }        

                        FeatureStore destinationStore = (FeatureStore) dataManager.openStore("Shape", newFeatureStoreParameters);

                        copyFeatureStore(sourceStore, 

                                        destinationStore,

                                        textValueAttribute);        

                        try {

                                copyLegend(destinationStore);

                        } catch (IOException e) {

                                LOG.error("Error copying the legend");

                        }

                        if (annotationCreationFinishAction != null){

                                annotationCreationFinishAction.finished(destinationStore);

                        }

                        return destinationStore;

                } catch (InitializeException e) {

                        throw new AnnotationCreationException(e);

                } catch (ProviderNotRegisteredException e) {

                        throw new AnnotationCreationException(e);

                } catch (ValidateDataParametersException e) {

                        throw new AnnotationCreationException(e);

                } catch (DynFieldNotFoundException e) {

                        throw new AnnotationCreationException(e);

                } catch (DataException e) {

                        throw new AnnotationCreationException(e);

                } catch (AnnotationPositionCalculatorCreationException e) {

                        throw new AnnotationCreationException(e);

                }                         

        }        

        public FeatureStore createAnnotationStore(String destinationShapeFile,

                        String textValueAttributeName) throws AnnotationCreationException {

                try {

                        return createAnnotationStore(destinationShapeFile, getIndex(textValueAttributeName));

                } catch (DataException e) {

                        throw new AnnotationCreationException(e);

                }                        

        }

        private void initializeFeatureType(EditableFeatureType editableFeatureType) throws DataException

        {                

                EditableFeatureAttributeDescriptor geometryType = editableFeatureType.add(destinationGeometryAttributeName, DataTypes.GEOMETRY);

                geometryType.setAllowNull(false);                

                geometryType.setGeometryType(Geometry.TYPES.POINT).setGeometrySubType(Geometry.SUBTYPES.GEOM2D);

                geometryType.setSRS(sourceStore.getDefaultFeatureType().getDefaultSRS());

                geometryType.setObjectClass(Geometry.class);

                editableFeatureType.add(AnnotationManager.TEXTVALUE_ATTRIBUTE_NAME, AnnotationDataTypes.TEXT, 256).setAllowNull(true);

                editableFeatureType.add(AnnotationManager.FONTTYPE_ATTRIBUTE_NAME, AnnotationDataTypes.FONTTYPE, 30).setAllowNull(true);

                editableFeatureType.add(AnnotationManager.FONTSTYLE_ATTRIBUTE_NAME, AnnotationDataTypes.FONTSTYLE, 30).setAllowNull(true);

                editableFeatureType.add(AnnotationManager.FONTCOLOR_ATTRIBUTE_NAME, AnnotationDataTypes.FONTCOLOR, 20).setAllowNull(true);

                editableFeatureType.add(AnnotationManager.FONTROTATION_ATTRIBUTE_NAME, AnnotationDataTypes.FONTROTATION, 5).setAllowNull(true);

                editableFeatureType.add(AnnotationManager.FONTHEGTH_ATTRIBUTE_NAME, AnnotationDataTypes.FONTHEIGHT, 5).setAllowNull(true);

        }

        private AttributeInserter createInserter(int attributePosition, Object defaultValue)

        {

                if (attributePosition > -1){

                        return new StoreAttributeInserter(attributePosition);

                }else{

                        return new DefaultAttributeInserter(defaultValue);

                }

        }

        private void copyFeatureStore(FeatureStore sourceStore,

                        FeatureStore destinationStore, int textAttribute)

        throws AnnotationCreationException, DataException {                

                //Start the edition

                destinationStore.edit();

                //Copy data

                FeatureSet featureSet = sourceStore.getFeatureSet();

                DisposableIterator iterator = featureSet.iterator();

                taskStatus.setRangeOfValues(0, featureSet.getSize());

                //Create the attribute inserter's

                AttributeInserter fontTypeAttributeInserter = createInserter(sourceFontTypeAttribute, manager.getDefaultFontType());                

                AttributeInserter fontStyleAttributeInserter = createInserter(sourceFontStyleAttribute, manager.getDefaultFontStyle());                

                AttributeInserter fontColorAttributeInserter = createInserter(sourceFontColorAttribute, manager.getDefaultFontColor());                

                AttributeInserter fontRotationAttributeInserter = createInserter(sourceRotationAttribute, manager.getDefaultFontRotation());                

                AttributeInserter fontHeigthAttributeInserter = createInserter(sourceHeigthAttribute, manager.getDefaultFontHeight());                

                Feature sourceFeature;

                long featureCount = 0;

                while (iterator.hasNext()) {                        

                        sourceFeature = (Feature) iterator.next();

                        EditableFeature destinationFeature = destinationStore.createNewFeature().getEditable();

                        try {

                                destinationFeature.set(destinationGeometryAttributeName, annotationPositionCalculator.getAnnotationPosition(sourceFeature));

                        } catch (AnnotationPositionCalculationException e) {

                                LOG.error("Not possible to get the point for the geometry", e);                                

                        }

                        destinationFeature.set(AnnotationManager.TEXTVALUE_ATTRIBUTE_NAME, sourceFeature.get(textAttribute));

                        destinationFeature.set(AnnotationManager.FONTTYPE_ATTRIBUTE_NAME, fontTypeAttributeInserter.getValue(sourceFeature));

                        destinationFeature.set(AnnotationManager.FONTSTYLE_ATTRIBUTE_NAME, fontStyleAttributeInserter.getValue(sourceFeature));

                        destinationFeature.set(AnnotationManager.FONTCOLOR_ATTRIBUTE_NAME, fontColorAttributeInserter.getValue(sourceFeature));

                        destinationFeature.set(AnnotationManager.FONTROTATION_ATTRIBUTE_NAME, fontRotationAttributeInserter.getValue(sourceFeature));

                        destinationFeature.set(AnnotationManager.FONTHEGTH_ATTRIBUTE_NAME, fontHeigthAttributeInserter.getValue(sourceFeature));

                        destinationStore.insert(destinationFeature);

                    featureCount++;  

                    this.taskStatus.setCurValue(featureCount);

            if (this.taskStatus.isCancellationRequested()) {

                return;

            }

                }

                //Finish the edition

                destinationStore.finishEditing();

                //Dispose resources

                iterator.dispose();                

                featureSet.dispose();

                this.taskStatus.terminate();

        this.taskStatus.remove();                

        }

        private void copyLegend(FeatureStore destinationStore) throws ValidateDataParametersException, DataException, IOException {

                FilesystemServerExplorer filesystemServerExplorer = (FilesystemServerExplorer)destinationStore.getExplorer();

                File target = filesystemServerExplorer.getResourcePath(destinationStore, "gvl");

                //Copy the template

                InputStream in = getClass().getClassLoader().getResourceAsStream("legend.template.gvl");

                OutputStream out = null;

                out = new FileOutputStream(target);

                byte[] buf = new byte[1024];

                int len;

                while ((len = in.read(buf)) > 0) { 

                        out.write(buf, 0, len); 

                } 

                in.close();

                out.close();                 

        }

        private void checkAttribute(int index, int type) throws DataException{

                if (index >= sourceStore.getDefaultFeatureType().size()){

                        throw new IllegalArgumentException("Attribute not found");

                }

                if (sourceStore.getDefaultFeatureType().getAttributeDescriptor(index).getDataType().getType() != type){

                        throw new IllegalArgumentException("The Attribute has not have the fine type");

                }

        }

        public void setFontTypetAttribute(int index) throws DataException {

                checkAttribute(index, AnnotationDataTypes.FONTTYPE);

                this.sourceFontTypeAttribute = index;                

        }

        public void setFontStyleAttribute(int index) throws DataException {

                checkAttribute(index, AnnotationDataTypes.FONTSTYLE);

                this.sourceFontStyleAttribute = index;                

        }

        public void setFontColorAttribute(int index) throws DataException {

                checkAttribute(index, AnnotationDataTypes.FONTCOLOR);

                this.sourceFontColorAttribute = index;                

        }

        public void setFontHeigthAttribute(int index) throws DataException {

                checkAttribute(index, AnnotationDataTypes.FONTHEIGHT);

                this.sourceHeigthAttribute = index;                

        }

        public void setFontRotationAttribute(int index) throws DataException {

                checkAttribute(index, AnnotationDataTypes.FONTROTATION);

                this.sourceRotationAttribute = index;                

        }

        public void setAnnotationPositionCalculator(

                        AnnotationPositionCalculator annotationPositionCalculator) {                

                this.annotationPositionCalculator = annotationPositionCalculator;                

        }

        public int getIndex(String attributeName) throws DataException{

                FeatureAttributeDescriptor featureAttributeDescriptor = sourceStore.getDefaultFeatureType().getAttributeDescriptor(attributeName);

                if (featureAttributeDescriptor != null){

                        return featureAttributeDescriptor.getIndex();

                }

                return -1;

        }

        public void setFontColorAttribute(String attributeName) throws DataException {

                setFontColorAttribute(getIndex(attributeName));                

        }

        public void setFontHeigthAttribute(String attributeName) throws DataException {

                setFontHeigthAttribute(getIndex(attributeName));                                

        }

        public void setFontRotationAttribute(String attributeName) throws DataException {

                setFontRotationAttribute(getIndex(attributeName));                                

        }

        public void setFontStyleAttribute(String attributeName) throws DataException {

                setFontStyleAttribute(getIndex(attributeName));                                

        }

        public void setFontTypetAttribute(String attributeName) throws DataException {

                setFontTypetAttribute(getIndex(attributeName));                                

        }

        public FeatureStore getFeatureStore() {

                return sourceStore;

        }

        private interface AttributeInserter{

                public Object getValue(Feature feature);

        }

        private class StoreAttributeInserter implements AttributeInserter{

                private int attributePosition = -1;

                public StoreAttributeInserter(int attributePosition) {

                        super();

                        this.attributePosition = attributePosition;                        

                }

                public Object getValue(Feature feature){

                        return feature.get(attributePosition);

                }

        }

        private class DefaultAttributeInserter implements AttributeInserter{

                private Object defaultValue = null;

                public DefaultAttributeInserter(Object defaultValue) {

                        super();        

                        this.defaultValue = defaultValue;

                }

                public Object getValue(Feature feature){

                        return defaultValue;

                }

        }

        public AnnotationCreationFinishAction getAnnotationCreationFinishAction() {

                return annotationCreationFinishAction;

        }

        public void setAnnotationCreationFinishAction(

                        AnnotationCreationFinishAction annotationCreationFinishAction) {

                this.annotationCreationFinishAction = annotationCreationFinishAction;        

        }

}