/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2014, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library 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
 *    Lesser General Public License for more details.
 */
package org.geotools.styling.builder;

import java.util.ArrayList;
import java.util.List;

import org.geotools.styling.FeatureTypeConstraint;
import org.geotools.styling.NamedLayer;
import org.geotools.styling.Style;

/**
 * 
 *
 * @source $URL$
 */
public class NamedLayerBuilder extends AbstractSLDBuilder<NamedLayer> {

    List<FeatureTypeConstraintBuilder> featureTypeConstraint = new ArrayList<FeatureTypeConstraintBuilder>();

    private String name;

    List<StyleBuilder> styles = new ArrayList<StyleBuilder>();

    public NamedLayerBuilder() {
        this(null);
    }

    public NamedLayerBuilder(AbstractSLDBuilder<?> parent) {
        super(parent);
        reset();
    }

    public NamedLayerBuilder name(String name) {
        this.unset = false;
        this.name = name;
        return this;
    }

    public StyleBuilder style() {
        this.unset = false;
        StyleBuilder sb = new StyleBuilder(this);
        styles.add(sb);
        return sb;
    }

    @SuppressWarnings("unchecked")
    public NamedLayer build() {
        if (unset) {
            return null;
        }
        NamedLayer layer = sf.createNamedLayer();
        layer.setName(name);
        List<FeatureTypeConstraint> list = new ArrayList<FeatureTypeConstraint>();
        for (FeatureTypeConstraintBuilder constraint : featureTypeConstraint) {
            list.add(constraint.build());
        }
        layer.layerFeatureConstraints().addAll(list);
        for (StyleBuilder sb : styles) {
            layer.addStyle(sb.build());
        }

        if (parent == null) {
            reset();
        }

        return layer;
    }

    public NamedLayerBuilder reset() {
        unset = false;
        this.name = null;
        featureTypeConstraint.clear();
        return this;
    }

    public NamedLayerBuilder reset(NamedLayer layer) {
        if (layer == null) {
            return unset();
        }
        this.name = layer.getName();
        featureTypeConstraint.clear();
        if (layer.layerFeatureConstraints() != null) {
            for (FeatureTypeConstraint featureConstraint : layer.layerFeatureConstraints()) {
                featureTypeConstraint.add(new FeatureTypeConstraintBuilder(this)
                        .reset(featureConstraint));
            }
        }
        styles.clear();
        for (Style style : layer.getStyles()) {
            styles.add(new StyleBuilder().reset(style));
        }
        unset = false;
        return this;
    }

    public NamedLayerBuilder unset() {
        return (NamedLayerBuilder) super.unset();
    }

    @Override
    protected void buildSLDInternal(StyledLayerDescriptorBuilder sb) {
        sb.namedLayer().init(this);
    }

}