/**
 * 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.cxf.jaxrs.spring;

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

import javax.xml.namespace.QName;

import org.w3c.dom.Element;

import org.apache.cxf.Bus;
import org.apache.cxf.BusFactory;
import org.apache.cxf.bus.spring.BusWiringBeanFactoryPostProcessor;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.configuration.spring.AbstractBeanDefinitionParser;
import org.apache.cxf.jaxrs.JAXRSServerFactoryBean;
import org.apache.cxf.jaxrs.JAXRSServiceFactoryBean;
import org.apache.cxf.jaxrs.lifecycle.ResourceProvider;
import org.apache.cxf.jaxrs.model.UserResource;
import org.apache.cxf.jaxrs.utils.ResourceUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanDefinitionStoreException;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;



public class JAXRSServerFactoryBeanDefinitionParser extends AbstractBeanDefinitionParser {
    
    public JAXRSServerFactoryBeanDefinitionParser() {
        super();
        setBeanClass(SpringJAXRSServerFactoryBean.class);
    }
    
    @Override
    protected void mapAttribute(BeanDefinitionBuilder bean, Element e, String name, String val) {
        if ("beanNames".equals(name)) {
            String[] values = val.split(" ");
            List<SpringResourceFactory> tempFactories = new ArrayList<SpringResourceFactory>(values.length);
            for (String v : values) {
                String theValue = v.trim();
                if (theValue.length() > 0) {
                    tempFactories.add(new SpringResourceFactory(theValue));
                }
            }
            bean.addPropertyValue("tempResourceProviders", tempFactories);
        } else if ("serviceName".equals(name)) {
            QName q = parseQName(e, val);
            bean.addPropertyValue(name, q);
        } else {
            mapToProperty(bean, name, val);
        }
    }

    @Override
    protected void mapElement(ParserContext ctx, BeanDefinitionBuilder bean, Element el, String name) {
        if ("properties".equals(name) 
            || "extensionMappings".equals(name)
            || "languageMappings".equals(name)) {
            Map map = ctx.getDelegate().parseMapElement(el, bean.getBeanDefinition());
            bean.addPropertyValue(name, map);
        } else if ("executor".equals(name)) {
            setFirstChildAsProperty(el, ctx, bean, "serviceFactory.executor");
        } else if ("invoker".equals(name)) {
            setFirstChildAsProperty(el, ctx, bean, "serviceFactory.invoker");
        } else if ("binding".equals(name)) {
            setFirstChildAsProperty(el, ctx, bean, "bindingConfig");
        } else if ("inInterceptors".equals(name) || "inFaultInterceptors".equals(name)
            || "outInterceptors".equals(name) || "outFaultInterceptors".equals(name)) {
            List list = ctx.getDelegate().parseListElement(el, bean.getBeanDefinition());
            bean.addPropertyValue(name, list);
        } else if ("features".equals(name) || "schemaLocations".equals(name) 
            || "providers".equals(name) || "serviceBeans".equals(name)
            || "modelBeans".equals(name)) {
            List list = ctx.getDelegate().parseListElement(el, bean.getBeanDefinition());
            bean.addPropertyValue(name, list);
        }  else if ("serviceFactories".equals(name)) {
            List list = ctx.getDelegate().parseListElement(el, bean.getBeanDefinition());
            bean.addPropertyValue("resourceProviders", list);
        } else if ("model".equals(name)) {
            List<UserResource> resources = ResourceUtils.getResourcesFromElement(el);
            bean.addPropertyValue("modelBeans", resources);
        } else {
            setFirstChildAsProperty(el, ctx, bean, name);            
        }        
    }
    

    @Override
    protected void doParse(Element element, ParserContext ctx, BeanDefinitionBuilder bean) {
        super.doParse(element, ctx, bean);

        bean.setInitMethodName("create");
        
        // We don't really want to delay the registration of our Server
        bean.setLazyInit(false);
    }

    @Override
    protected String resolveId(Element elem, 
                               AbstractBeanDefinition definition, 
                               ParserContext ctx) 
        throws BeanDefinitionStoreException {
        String id = super.resolveId(elem, definition, ctx);
        if (StringUtils.isEmpty(id)) {
            id = getBeanClass().getName() + "--" + definition.hashCode();
        }
        
        return id;
    }

    @Override
    protected boolean hasBusProperty() {
        return true;
    }
    
    public static class SpringJAXRSServerFactoryBean extends JAXRSServerFactoryBean implements
        ApplicationContextAware {
        
        private List<SpringResourceFactory> tempFactories;

        public SpringJAXRSServerFactoryBean() {
            super();
        }

        public SpringJAXRSServerFactoryBean(JAXRSServiceFactoryBean sf) {
            super(sf);
        }
        
        public void setTempResourceProviders(List<SpringResourceFactory> providers) {
            tempFactories = providers;
        }

        public void setApplicationContext(ApplicationContext ctx) throws BeansException {
            if (tempFactories != null) {
                List<ResourceProvider> factories = new ArrayList<ResourceProvider>(
                    tempFactories.size());
                for (int i = 0; i < tempFactories.size(); i++) {
                    SpringResourceFactory factory = tempFactories.get(i);
                    factory.setApplicationContext(ctx);
                    factories.add(factory);
                }
                tempFactories.clear();
                super.setResourceProviders(factories);
            }
            if (getBus() == null) {
                Bus bus = BusFactory.getThreadDefaultBus();
                BusWiringBeanFactoryPostProcessor.updateBusReferencesInContext(bus, ctx);
                setBus(bus);
            }
        }
    }
}
