/**
 *
 *   Copyright 2015 sourceforge.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
package org.gwtopenmaps.openlayers.client;

import org.gwtopenmaps.openlayers.client.feature.VectorFeature;
import org.gwtopenmaps.openlayers.client.style.Rule;
import org.gwtopenmaps.openlayers.client.util.JObjectArray;
import org.gwtopenmaps.openlayers.client.util.JSObject;

/**
 *
 * StyleMap contais a set of tree styles
 * <ul>
 * <li>default : the default style to render the feature </li>
 * <li>select : the style to render the feature when it is selected </li>
 * <li> temporary: style to render the feature when it is temporarily selected
 * </li>
 * </ul>
 *
 * @author Rafael Ceravolo - LOGANN
 * @author Lukas Johansson
 */
public class StyleMap extends OpenLayersObjectWrapper {

    protected StyleMap(JSObject openLayersObject) {
        super(openLayersObject);
    }

    /**
     * Creates a StyleMap with default properties
     */
    public StyleMap() {
        this(StyleMapImpl.create());
    }

    /**
     * Creates a StyleMap setting the same style for all renderer intents.
     * <p>
     * From OpenLayers documentation: If just one style hash or style object is
     * passed, this will be used for all known render intents (default, select,
     * temporary)
     */
    public StyleMap(Style style) {
        this(
                StyleMapImpl.create(
                        style.getJSObject(),
                        style.getJSObject(),
                        style.getJSObject()
                )
        );
    }

    /**
     * Creates a StyleMap setting different styles for renderer intents.
     * <p>
     * Avoid passing null for one of the styles. If just want to use 2 style,
     * pass the same style for selectStyle and tempraryStyle parameters.
     *
     * @param defaultStyle the default style to render the feature
     * @param selectStyle the style to render the feature when it is selected
     * @param temporaryStyle style to render the feature when it is temporarily
     * selected
     */
    public StyleMap(Style defaultStyle, Style selectStyle, Style temporaryStyle) {
        this(
                StyleMapImpl.create(
                        defaultStyle == null ? null : defaultStyle.getJSObject(),
                        selectStyle == null ? null : selectStyle.getJSObject(),
                        temporaryStyle == null ? null : temporaryStyle.getJSObject()
                )
        );
    }

    public StyleMap(OpenLayersStyle defaultStyle, OpenLayersStyle selectStyle, OpenLayersStyle temporaryStyle) {
        this(
                defaultStyle == null ? null : defaultStyle.getJSObject(),
                selectStyle == null ? null : selectStyle.getJSObject(),
                temporaryStyle == null ? null : temporaryStyle.getJSObject()
        );
    }

    private StyleMap(JSObject defaultStyle, JSObject selectStyle, JSObject temporaryStyle) {
        this(StyleMapImpl.create(defaultStyle, selectStyle, temporaryStyle));
    }

    public static StyleMap narrowToOpenLayersStyleMap(JSObject element) {
        return (element == null) ? null : new StyleMap(element);
    }

    public Style createSymbolizer(VectorFeature feature, String renderIntent) {
        return Style.narrowToOpenLayersStyle(
                StyleImpl.createSymbolizer(
                        getJSObject(),
                        feature.getJSObject(),
                        renderIntent
                )
        );
    }

    /**
     * Add rules to the given Style of a StyleMap
     *
     * @param rules The rules to add
     * @param symbolizer The symbolizer of the style (default, temporary,
     * select, delete, ...)
     * @return
     */
    public void addRules(Rule[] rules, String symbolizer) {
        JObjectArray array = new JObjectArray(rules);
        JSObject style = getJSObject().getProperty("styles").getProperty(symbolizer);
        StyleImpl.addRules(style, array.getJSObject());
    }
}