/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.felix.scrplugin.tags.annotation.defaulttag;

import java.util.*;

import org.apache.felix.scr.annotations.AutoDetect;
import org.apache.felix.scr.annotations.Service;
import org.apache.felix.scrplugin.Constants;
import org.apache.felix.scrplugin.tags.JavaClassDescription;
import org.apache.felix.scrplugin.tags.annotation.AbstractTag;
import org.apache.felix.scrplugin.tags.annotation.Util;

import com.thoughtworks.qdox.model.Annotation;

/**
 * Description of a java tag for components.
 */
public class ServiceTag extends AbstractTag {

    protected final Service annotation;

    protected final String serviceInterface;

    /**
     * @param annotation Annotation
     * @param desc Description
     */
    public ServiceTag(final Annotation annotation,
            final JavaClassDescription desc,
            final Service tag,
            final String serviceInterface) {
        super(annotation, desc, null);
        this.annotation = tag;
        this.serviceInterface = serviceInterface;
    }

    @Override
    public String getName() {
        return Constants.SERVICE;
    }

    @Override
    public String getSourceName() {
        return "Service";
    }

    @Override
    public Map<String, String> createNamedParameterMap() {
        final Map<String, String> map = new HashMap<String, String>();

        map.put(Constants.SERVICE_INTERFACE, this.serviceInterface);
        map.put(Constants.SERVICE_FACTORY, String.valueOf(this.annotation.serviceFactory()));

        return map;
    }

    public static List<ServiceTag> createServiceTags(final Annotation annotation, JavaClassDescription desc) {
        final Service tag = new Service() {

            public boolean serviceFactory() {
                return Util.getBooleanValue(annotation, "serviceFactory", Service.class);
            }

            public Class<?>[] value() {
                return Util.getClassArrayValue(annotation, "value", Service.class);
            }

            public Class<? extends java.lang.annotation.Annotation> annotationType() {
                return null;
            }
        };
        final Class<?>[] classes = tag.value();
        if ( classes != null && classes.length > 0
             && (classes.length != 1 || !classes[0].getName().equals(AutoDetect.class.getName()))) {
            final List<ServiceTag> tags = new ArrayList<ServiceTag>();
            for(final Class<?> c : classes ) {
                tags.add(new ServiceTag(annotation, desc, tag, c.getName()));
            }
            return tags;
        }
        return Collections.singletonList(new ServiceTag(annotation, desc, tag, null));
    }
}