package com.ximple.eofms.filter;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.List;
import java.util.TreeMap;
import javax.swing.event.EventListenerList;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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 com.vividsolutions.jts.geom.Geometry;
import com.vividsolutions.jts.geom.GeometryFactory;
import com.vividsolutions.jts.geom.CoordinateList;
import com.vividsolutions.jts.geom.Coordinate;
import com.vividsolutions.jts.util.Assert;

import com.ximple.eofms.util.DefaultColorTable;
import com.ximple.eofms.util.FeatureTypeBuilderUtil;
import com.ximple.eofms.util.TWD97GeometryConverterDecorator;
import com.ximple.io.dgn7.Element;
import com.ximple.io.dgn7.FrammeAttributeData;
import com.ximple.io.dgn7.GeometryConverter;
import com.ximple.io.dgn7.TextElement;
import com.ximple.io.dgn7.TextNodeElement;
import com.ximple.io.dgn7.UserAttributeData;

public class CreateMultiSymbolStrategy implements CreateFeatureTypeStrategy
{
    static final Log logger = LogFactory.getLog(CreateMultiSymbolStrategy.class);
    GeometryFactory geometryFactory = new GeometryFactory();
    TreeMap<String, FeatureTypeBuilder> typeBuilders = new TreeMap<String, FeatureTypeBuilder>();
    TWD97AnchorGeometryConverterDecorator convertDecorator = new TWD97AnchorGeometryConverterDecorator();

    // Create the listener list
    protected EventListenerList listenerList = new EventListenerList();

    public CreateMultiSymbolStrategy()
    {
    }

    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 FeatureType createFeatureElement(String featureName) throws SchemaException
    {
        if (!typeBuilders.containsKey(featureName))
        {
            FeatureTypeBuilder typeBuilder = FeatureTypeBuilderUtil.createMultiSymbolFeatureTypeBuilder(featureName);
            typeBuilders.put(featureName, typeBuilder);
            fireFeatureTypeEvent(new FeatureTypeEvent(this, typeBuilder.getFeatureType()));
        }
        return typeBuilders.get(featureName).getFeatureType();
    }

    public Feature createFeature(FeatureType featureType, Element element, boolean useTransform) throws IllegalAttributeException
    {
        DefaultColorTable colorTable = (DefaultColorTable) DefaultColorTable.getInstance();
        FrammeAttributeData fLinkage = getFeatureLinkage(element);
        Feature feature = null;
        if (fLinkage == null) return null;
        if (element instanceof TextElement)
        {
            TextElement txtElement = (TextElement) element;
            double angle = txtElement.getRotationAngle();
            angle = BigDecimal.valueOf(angle).setScale(3, RoundingMode.HALF_UP).doubleValue();
            if (txtElement.getText().length() == 0)
            {
                logger.info("CreateMultiSymbolStrategy cannot conver " + element.toString() +
                        "to Feature - getText() is empty.");
                return null;
            }
            StringBuilder sb = new StringBuilder();
            sb.append("OCT");
            char id = txtElement.getText().toCharArray()[0];
            sb.append(Integer.toOctalString((int) id));
            sb.append("-");
            sb.append(txtElement.getFontIndex());

            Geometry gobj;
            if (useTransform)
            {
            convertDecorator.setConverter(txtElement);
            gobj = convertDecorator.toGeometry(geometryFactory);
            } else {
                gobj = txtElement.toGeometry(geometryFactory);
            }
            if (gobj != null)
                feature = featureType.create(new Object[]{
                        gobj,
                        fLinkage.getFsc(),
                        (long) fLinkage.getUfid(),
                        (short) fLinkage.getComponentID(),
                        fLinkage.getOccID(),
                        (short) txtElement.getLevelIndex(),
                        colorTable.getColorCode(txtElement.getColorIndex()),
                        (short) txtElement.getWeight(),
                        (short) txtElement.getLineStyle(),
                        (short) txtElement.getJustification(),
                        (float) txtElement.getTextHeight(),
                        (float) txtElement.getTextWidth(),
                        (float) angle,
                        sb.toString()
                });
        } else if (element instanceof TextNodeElement)
        {
            TextNodeElement nodeElement = (TextNodeElement) element;
            double angle = nodeElement.getRotationAngle();
            angle = BigDecimal.valueOf(angle).setScale(3, RoundingMode.HALF_UP).doubleValue();
            if (nodeElement.size() == 0)
            {
                logger.info("CreateMultiSymbolStrategy cannot conver " + element.toString() +
                        "to Feature - getText() is empty.");
                return null;
            }

            String[] tmpstrs = nodeElement.getTextArray();

            StringBuilder sb = new StringBuilder();
            sb.append("OCT");
            char id = tmpstrs[0].toCharArray()[0];
            sb.append(Integer.toOctalString((int) id));
            sb.append("-");
            sb.append(nodeElement.getFontIndex());

            Geometry gobj;
            if (useTransform)
            {
                convertDecorator.setConverter(nodeElement);
            gobj = convertDecorator.toGeometry(geometryFactory);
            } else {
                gobj = nodeElement.toGeometry(geometryFactory);
            }
            if (gobj != null)
                feature = featureType.create(new Object[]{
                        gobj,
                        fLinkage.getFsc(),
                        (long) fLinkage.getUfid(),
                        (short) fLinkage.getComponentID(),
                        fLinkage.getOccID(),
                        (short) nodeElement.getLevelIndex(),
                        colorTable.getColorCode(nodeElement.getColorIndex()),
                        (short) nodeElement.getWeight(),
                        (short) nodeElement.getLineStyle(),
                        (short) nodeElement.getJustification(),
                        (float) nodeElement.getTextNodeHeight(),
                        (float) nodeElement.getTextNodeLength(),
                        (float) angle,
                        sb.toString()
                });
        } else
        {
            logger.info("CreateMultiSymbolStrategy cannot conver " + element.toString() + "to Feature");
        }
        return feature;
    }


    public void addCreateFeatureTypeEventListener(CreateFeatureTypeEventListener listener)
    {
        listenerList.add(CreateFeatureTypeEventListener.class, listener);
    }

    public void removeCreateFeatureTypeEventListener(CreateFeatureTypeEventListener listener)
    {
        listenerList.remove(CreateFeatureTypeEventListener.class, listener);
    }

    protected void fireFeatureTypeEvent(FeatureTypeEvent evt)
    {
        Object[] listeners = listenerList.getListenerList();
        for (int i = 0; i < listeners.length; i += 2)
        {
            if (listeners[i] == CreateFeatureTypeEventListener.class)
            {
                ((CreateFeatureTypeEventListener) listeners[i + 1]).createFeatureTypeOccurred(evt);
            }
        }
    }

    private static class TWD97AnchorGeometryConverterDecorator extends TWD97GeometryConverterDecorator
    {
        public Geometry toGeometry(GeometryFactory factory)
        {
            if (getConverter() == null) Assert.shouldNeverReachHere();

            getCoordinatesFilter().reset();

            GeometryConverter converter = getConverter();
            Geometry geom = null;
            try
            {
                if (converter instanceof TextElement)
                {
                    geom = ((TextElement) converter).toAnchorGeometry(factory);
                } else if (converter instanceof TextNodeElement)
                {
                    geom = ((TextNodeElement) converter).toAnchorGeometry(factory);
                }
            } catch (ArrayStoreException e)
            {
                logger.warn(e.getMessage(), e);
                if (converter instanceof TextNodeElement)
                {
                    TextNodeElement node = (TextNodeElement) converter;
                    CoordinateList pts = new CoordinateList();
                    for (int i = 0; i < node.size(); i++)
                    {
                        TextElement txtElm = (TextElement) node.get(i);
                        Coordinate[] coords = txtElm.toAnchorCoordinates();
                        logger.warn("-coords=[" + coords.length + "]");
                        for (int j = 0; j < coords.length; j++)
                        {
                            logger.warn("[" + j + "]-" + coords.toString());
                        }
                    }
                }
            }
            if (geom == null) return null;
            geom.apply(getCoordinatesFilter());
            return geom;
        }
    }
}