package com.ximple.eofms.filter;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.List;
import java.util.TreeMap;

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.GeometryFactory;

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.TextElement;
import com.ximple.io.dgn7.UserAttributeData;

public class CreateSymbolStrategy implements CreateFeatureTypeStrategy
{
    static final Log logger = LogFactory.getLog(CreateSymbolStrategy.class);
    GeometryFactory geometryFactory = new GeometryFactory();
    TreeMap<String, FeatureTypeBuilder> typeBuilders = new TreeMap<String, FeatureTypeBuilder>();
    TWD97GeometryConverterDecorator convertDecorator = new TWD97GeometryConverterDecorator();

    public CreateSymbolStrategy()
    {
    }

    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.createSymbolFeatureTypeBuilder(featureName);
            typeBuilders.put(featureName, typeBuilder);
        }
        return typeBuilders.get(featureName).getFeatureType();
    }

    public Feature createFeature(FeatureType featureType, Element element) 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("CreateSymbolStrategy 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());

            convertDecorator.setConverter(txtElement);
            feature = featureType.create(new Object[]{
                    convertDecorator.toGeometry(geometryFactory),
                    fLinkage.getFsc(),
                    (long) fLinkage.getUfid(),
                    (short) fLinkage.getComponentID(),
                    (short) 0,
                    (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
        {
            logger.info("CreateSymbolStrategy cannot conver " + element.toString() + "to Feature");
        }
        return feature;
    }
}