package com.ximple.eofms.jobs;

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.transaction.memory.PessimisticMapWrapper;
import org.apache.commons.transaction.util.CommonsLoggingLogger;
import org.apache.commons.transaction.util.LoggerFacade;
import org.geotools.data.FeatureWriter;
import org.geotools.data.Transaction;
import org.geotools.data.shapefile.ShapefileDataStore;
import org.geotools.feature.AttributeTypeFactory;
import org.geotools.feature.Feature;
import org.geotools.feature.FeatureType;
import org.geotools.feature.FeatureTypeBuilder;
import org.geotools.feature.IllegalAttributeException;
import org.geotools.feature.SchemaException;
import org.geotools.feature.SimpleFeature;

import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryFactory;

import com.ximple.eofms.util.DefaultColorTable;
import com.ximple.eofms.util.TPCLIDConverter;
import com.ximple.eofms.util.TWDDatumConverter;
import com.ximple.io.dgn7.Element;
import com.ximple.io.dgn7.FrammeAttributeData;
import com.ximple.io.dgn7.TextElement;
import com.ximple.io.dgn7.UserAttributeData;

public class IndexDgnConvertJobContext extends AbstractDgnFileJobContext
{
    static final Log logger = LogFactory.getLog(IndexDgnConvertJobContext.class);
    static final LoggerFacade sLogger = new CommonsLoggingLogger(logger);
    static final GeometryFactory geometryFactory = new GeometryFactory();
    static final String SHPOUTPATH = "shpout";

    private String dataOut = null;

    private HashMap featuresContext = new HashMap();
    private HashMap featuresWriterContext = new HashMap();

    private PessimisticMapWrapper txFeaturesContext;
    private FeatureTypeBuilder typeBuilder = null;
    private FeatureType featureType = null;

    public IndexDgnConvertJobContext(String dataPath)
    {
        super(dataPath);
        txFeaturesContext = new PessimisticMapWrapper(featuresContext, sLogger);
    }

    public void putFeatureCollection(Element element) throws IllegalAttributeException, SchemaException
    {
        if (!(element instanceof TextElement))
        {
            return;
        }

        Feature feature = createFeature((TextElement) element);
        if (feature == null)
        {
            logger.info("cannot craete feature." + element.toString() + "'" +
                    ((TextElement) element).getText() + "'");
            return;
        }

        if (!txFeaturesContext.containsKey(feature.getFeatureType()))
        {
            txFeaturesContext.put(feature.getFeatureType(), new ArrayList());
        }
        ArrayList arrayList = (ArrayList) txFeaturesContext.get(feature.getFeatureType());
        arrayList.add(feature);
    }

    public void startTransaction()
    {
    }

    public void commitTransaction()
    {
        if (!txFeaturesContext.isEmpty())
        {
             logger.debug("Transaction size = " + txFeaturesContext.size());
            //txFeaturesContext.commitTransaction();
         } else
         {
             logger.debug("Transaction is empty.");
         }

         if (!featuresContext.isEmpty())
         {
             updateDataStore();
         }
    }

    public void rollbackTransaction()
    {
        //txFeaturesContext.rollbackTransaction();
         if (!featuresContext.isEmpty())
         {
             updateDataStore();
         }
    }

    private void updateDataStore()
    {
        Iterator it = featuresContext.keySet().iterator();

        try
        {
            while (it.hasNext())
            {
                FeatureType featureType = (FeatureType) it.next();
                File sfile = new File(getDataOutPath() + "\\" + featureType.getTypeName());
                logger.debug("Begin Save shapefile:" + sfile.toURI());

                FeatureWriter writer;
                if(featuresWriterContext.containsKey(featureType.getTypeName()))
                {
                    writer = (FeatureWriter) featuresWriterContext.get(featureType.getTypeName()) ;
                }
                else
                {
                  ShapefileDataStore shapefileDataStore = new ShapefileDataStore(sfile.toURI().toURL());
                  shapefileDataStore.createSchema(featureType);
                  writer = shapefileDataStore.getFeatureWriter(featureType.getTypeName(), Transaction.AUTO_COMMIT);
                  if(this.featuresWriterContext == null)
                  {
                     this.featuresWriterContext =  new HashMap();
                  }
                  featuresWriterContext.put(featureType.getTypeName() , writer);
                }

                ArrayList features = (ArrayList) featuresContext.get(featureType);
                Iterator itFeature = features.iterator();
                while (itFeature.hasNext())
                {
                    Feature feature = (Feature) itFeature.next();
                    ((SimpleFeature) writer.next()).setAttributes(feature.getAttributes(null));
                }
                //writer.close();
                logger.debug("End Save shapefile:" + sfile.toURI());
            }
            featuresContext.clear();
        } catch (MalformedURLException e)
        {
            logger.error(e.getMessage(), e);
        } catch (IllegalAttributeException e)
        {
            logger.error(e.getMessage(), e);
        } catch (IOException e)
        {
            logger.error(e.getMessage(), e);
        }
    }

    public String getDataOutPath()
    {
        if (dataOut == null)
        {
            File outPath = new File(getDataPath(), SHPOUTPATH);
            if (!outPath.exists())
            {
                outPath.mkdir();
            } else if (!outPath.isDirectory())
            {
                outPath.mkdir();
            }
            dataOut = getDataPath() + SHPOUTPATH;
        }
        return dataOut;
    }

    public FeatureType createFeatureElement(String featureName) throws SchemaException
    {
        if (typeBuilder == null)
        {
            typeBuilder = FeatureTypeBuilder.newInstance(featureName);
            typeBuilder.addType(AttributeTypeFactory.newAttributeType("GEOM", Geometry.class));
            typeBuilder.addType(AttributeTypeFactory.newAttributeType("X1", Double.class));
            typeBuilder.addType(AttributeTypeFactory.newAttributeType("Y1", Double.class));
            typeBuilder.addType(AttributeTypeFactory.newAttributeType("X2", Double.class));
            typeBuilder.addType(AttributeTypeFactory.newAttributeType("Y2", Double.class));
            typeBuilder.addType(AttributeTypeFactory.newAttributeType("TPCID", String.class));
            typeBuilder.addType(AttributeTypeFactory.newAttributeType("SYMCOLOR", String.class));
            typeBuilder.addType(AttributeTypeFactory.newAttributeType("SYMWEIGHT", Integer.class));
            typeBuilder.addType(AttributeTypeFactory.newAttributeType("SYMSTYLE", Integer.class));
        }
        return typeBuilder.getFeatureType();
    }

    public Feature createFeature(FeatureType featureType, Element element) throws IllegalAttributeException
    {
        DefaultColorTable colorTable = (DefaultColorTable) DefaultColorTable.getInstance();
        if (element instanceof TextElement)
        {
            TextElement textElement = (TextElement) element;
            String tpclid = textElement.getText();

            Envelope extent = TPCLIDConverter.convertTpclIdToEnvelope(tpclid);
            Geometry geom = geometryFactory.createLinearRing(new Coordinate[]
            {
                    TWDDatumConverter.fromTM2ToTWD97(new Coordinate(extent.getMinX(), extent.getMinY())),
                    TWDDatumConverter.fromTM2ToTWD97(new Coordinate(extent.getMaxX(), extent.getMinY())),
                    TWDDatumConverter.fromTM2ToTWD97(new Coordinate(extent.getMaxX(), extent.getMaxY())),
                    TWDDatumConverter.fromTM2ToTWD97(new Coordinate(extent.getMinX(), extent.getMaxY())),
                    TWDDatumConverter.fromTM2ToTWD97(new Coordinate(extent.getMinX(), extent.getMinY())),
            });

            Feature feature = featureType.create(new Object[]{
                    geom,
                    extent.getMinX(),
                    extent.getMinY(),
                    extent.getMaxX(),
                    extent.getMaxY(),
                    tpclid,
                    colorTable.getColorCode(textElement.getColorIndex()),
                    textElement.getWeight(),
                    textElement.getLineStyle()
            });
            return feature;
        }
        return null;
    }
    
    private Feature createFeature(TextElement element) throws SchemaException, IllegalAttributeException
    {
        if (featureType == null)
        {
            String dgnname = getFilename().toLowerCase();
            int i = dgnname.lastIndexOf(".");
            if (i != -1)
            {
                dgnname = dgnname.substring(0, i);
            }
            featureType = createFeatureElement(dgnname);
        }
        return createFeature(featureType, element);
    }

    protected FrammeAttributeData getFeatureLinkage(Element element)
    {
        if (!element.hasUserAttributeData())
            return null;

        List<UserAttributeData> usrDatas = element.getUserAttributeData();
        for (UserAttributeData anUsrData : usrDatas)
        {
            if (anUsrData instanceof FrammeAttributeData)
            {
                return (FrammeAttributeData) anUsrData;
            }
        }
        return null;
    }
}