package com.ximple.eofms.jobs.context.postgis;

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

import org.apache.commons.digester.Digester;
import org.apache.commons.digester.xmlrules.DigesterLoader;
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.DataStore;
import org.geotools.data.FeatureWriter;
import org.geotools.data.Transaction;
import org.geotools.feature.Feature;
import org.geotools.feature.FeatureType;
import org.geotools.feature.IllegalAttributeException;
import org.geotools.feature.SchemaException;
import org.geotools.feature.SimpleFeature;
import org.xml.sax.SAXException;

import com.vividsolutions.jts.geom.GeometryFactory;

import com.ximple.eofms.filter.AbstractFLinkageDispatchableFilter;
import com.ximple.eofms.filter.ElementDispatchableFilter;
import com.ximple.eofms.filter.ElementDispatcher;
import com.ximple.eofms.filter.TypeCompIdDispatchableFilter;
import com.ximple.eofms.filter.TypeCompLevelIdDispatchableFilter;
import com.ximple.eofms.filter.TypeIdDispatchableFilter;
import com.ximple.io.dgn7.ComplexElement;
import com.ximple.io.dgn7.Element;
import com.ximple.io.dgn7.FrammeAttributeData;
import com.ximple.io.dgn7.UserAttributeData;

public class DummyFeatureConvertPostGISJobContext extends AbstractDgnToPostGISJobContext
{
    static final Log logger = LogFactory.getLog(DummyFeatureConvertPostGISJobContext.class);
    static final LoggerFacade sLogger = new CommonsLoggingLogger(logger);
    static final GeometryFactory geometryFactory = new GeometryFactory();

    private String dataOut = null;

    private HashMap<String, ArrayList<Feature>> featuresContext = new HashMap<String, ArrayList<Feature>>();
    private HashMap<String, FeatureWriter> featuresWriterContext = new HashMap<String, FeatureWriter>();

    private PessimisticMapWrapper txFeaturesContext;

    private ElementDispatcher elementDispatcher;
    private String _filterConfig;
    private boolean withIndex = false;

    public DummyFeatureConvertPostGISJobContext(String dataPath, DataStore targetDataStore, String targetSchema, String filterConfig)
    {
        super(dataPath, targetDataStore, targetSchema);
        txFeaturesContext = new PessimisticMapWrapper(featuresContext, sLogger);
        _filterConfig = filterConfig;
        elementDispatcher = createElementDispatcher();
    }

    private ElementDispatcher createElementDispatcher()
    {
        try
        {
            URL rulesURL = ElementDispatcher.class.getResource("ElementDispatcherRules.xml");
            assert rulesURL != null;
            Digester digester = DigesterLoader.createDigester(rulesURL);
            URL filterURL = null;
            if (_filterConfig != null)
            {
                File config = new File(_filterConfig);
                if (config.exists())
                {
                    filterURL = config.toURI().toURL();
                }
            }
            if (filterURL == null)
            {
                // config = new File("conf/DefaultConvertShpFilter.xml");
                filterURL = this.getClass().getResource("/conf/DefaultConvertShpFilter.xml");
                // filterURL = this.getClass().getResource("/conf/ConvertShpFilterForLevel.xml");
            }
            assert filterURL != null;
            return (ElementDispatcher) digester.parse(filterURL);
        } catch (UnsupportedEncodingException e)
        {
            logger.info(e.getMessage(), e);
            throw new RuntimeException(e.getMessage(), e);
        } catch (MalformedURLException e)
        {
            logger.info(e.getMessage(), e);
            throw new RuntimeException(e.getMessage(), e);
        } catch (IOException e)
        {
            logger.info(e.getMessage(), e);
            throw new RuntimeException(e.getMessage(), e);
        } catch (SAXException e)
        {
            logger.info(e.getMessage(), e);
            throw new RuntimeException(e.getMessage(), e);
        }
    }

    public void putFeatureCollection(Element element) throws IllegalAttributeException, SchemaException
    {
        assert elementDispatcher != null;

        if (element == null)
        {
            logger.warn("Unknown Element:" + null);
            return;
        }

        // 判斷是否符和條件
        Feature feature = elementDispatcher.execute(element, true);
        if (feature == null)
        {
            FrammeAttributeData linkage =
                    AbstractFLinkageDispatchableFilter.getFeatureLinkage(element);
            logger.warn("Unknown Element:" + element.getElementType().toString() +
                    ":type=" + element.getType() + ":lv=" + element.getLevelIndex() + ":id=" +
                    (linkage == null ? "NULL" : (linkage.getFsc() + "|" + linkage.getComponentID())));
            if (element instanceof ComplexElement)
            {
                ComplexElement complex = (ComplexElement) element;
                logger.warn("----Complex Element size=" + complex.size());
            }

            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()
    {
        assert elementDispatcher != null;
        for (ElementDispatchableFilter filter : elementDispatcher.getRules())
        {
            if (filter instanceof TypeCompIdDispatchableFilter)
            {
                ((TypeCompIdDispatchableFilter) filter).getCreateStrategy();
            } else if (filter instanceof TypeCompLevelIdDispatchableFilter)
            {
                ((TypeCompIdDispatchableFilter) filter).getCreateStrategy();
            } else if (filter instanceof TypeIdDispatchableFilter)
            {
                ((TypeCompIdDispatchableFilter) filter).getCreateStrategy();
            }
        }
    }

    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();
                logger.debug("Begin Save PostGIS:" + featureType.getTypeName());

                FeatureWriter writer;
                if (featuresWriterContext.containsKey(featureType.getTypeName()))
                {
                    writer = featuresWriterContext.get(featureType.getTypeName());
                } else
                {
                    if (!isExistFeature(featureType))
                    {
                        targetDataStore.createSchema(featureType);
                        writer = targetDataStore.getFeatureWriter(featureType.getTypeName(), Transaction.AUTO_COMMIT);
                    } else
                    {
                        writer = targetDataStore.getFeatureWriterAppend(featureType.getTypeName(), Transaction.AUTO_COMMIT);
                    }
                    featuresWriterContext.put(featureType.getTypeName(), writer);
                }

                ArrayList<Feature> features = 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 PostGIS:" + featureType.getTypeName());
            }
            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 void closeFeatureWriter() throws IOException
    {

        for (FeatureWriter featureWriter : this.featuresWriterContext.values())
        {
            featureWriter.close();
        }

        this.featuresWriterContext.clear();
    }

    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;
    }


    public boolean isWithIndex()
    {
        return withIndex;
    }

    public void setWithIndex(boolean withIndex)
    {
        this.withIndex = withIndex;
    }

    public Log getLogger()
    {
        return logger;
    }
}