/*
 * Licensed to DuraSpace under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership.
 *
 * DuraSpace 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.fcrepo.http.commons.test.util;

import static org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpServerFactory.createHttpServer;
import static org.slf4j.LoggerFactory.getLogger;

import java.net.URI;
import java.util.Collection;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Unmarshaller;

import org.fcrepo.http.commons.webxml.WebAppConfig;
import org.fcrepo.http.commons.webxml.bind.ContextParam;
import org.fcrepo.http.commons.webxml.bind.Filter;
import org.fcrepo.http.commons.webxml.bind.FilterMapping;
import org.fcrepo.http.commons.webxml.bind.InitParam;
import org.fcrepo.http.commons.webxml.bind.Listener;
import org.fcrepo.http.commons.webxml.bind.Servlet;
import org.fcrepo.http.commons.webxml.bind.ServletMapping;
import org.glassfish.grizzly.http.server.HttpServer;
import org.glassfish.grizzly.servlet.FilterRegistration;
import org.glassfish.grizzly.servlet.ServletRegistration;
import org.glassfish.grizzly.servlet.WebappContext;
import org.slf4j.Logger;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

/**
 * <p>ContainerWrapper class.</p>
 *
 * @author awoods
 */
public class ContainerWrapper implements ApplicationContextAware {

    private static final Logger logger = getLogger(ContainerWrapper.class);

    private int port;

    private HttpServer server;

    private WebappContext appContext;

    private String configLocation;

    public void setConfigLocation(final String configLocation) {
        this.configLocation = configLocation.replaceFirst("^classpath:", "/");
    }

    public void setPort(final int port) {
        this.port = port;
    }

    @PostConstruct
    public void start() throws Exception {

        final JAXBContext context = JAXBContext.newInstance(WebAppConfig.class);
        final Unmarshaller u = context.createUnmarshaller();
        final WebAppConfig o =
                (WebAppConfig) u.unmarshal(getClass().getResource(
                        this.configLocation));

        final URI uri = URI.create("http://localhost:" + port);

        server = createHttpServer(uri);

        // create a "root" web application
        appContext = new WebappContext(o.displayName(), "/");

        for (final ContextParam p : o.contextParams()) {
            appContext.addContextInitParameter(p.name(), p.value());
        }

        for (final Listener l : o.listeners()) {
            appContext.addListener(l.className());
        }

        for (final Servlet s : o.servlets()) {
            final ServletRegistration servlet =
                    appContext.addServlet(s.servletName(), s.servletClass());

            final Collection<ServletMapping> mappings =
                    o.servletMappings(s.servletName());
            for (final ServletMapping sm : mappings) {
                servlet.addMapping(sm.urlPattern());
            }
            for (final InitParam p : s.initParams()) {
                servlet.setInitParameter(p.name(), p.value());
            }
        }

        for (final Filter f : o.filters()) {
            final FilterRegistration filter =
                    appContext.addFilter(f.filterName(), f.filterClass());

            final Collection<FilterMapping> mappings =
                    o.filterMappings(f.filterName());
            for (final FilterMapping sm : mappings) {
                final String urlPattern = sm.urlPattern();
                final String servletName = sm.servletName();
                if (urlPattern != null) {
                    filter.addMappingForUrlPatterns(null, urlPattern);
                } else {
                    filter.addMappingForServletNames(null, servletName);
                }

            }
            for (final InitParam p : f.initParams()) {
                filter.setInitParameter(p.name(), p.value());
            }
        }

        appContext.deploy(server);

        logger.debug("started grizzly webserver endpoint at " +
                server.getHttpHandler().getName());
    }

    @PreDestroy
    public void stop() {
        try {
            appContext.undeploy();
        } catch (final Exception e) {
            logger.warn(e.getMessage(), e);
        } finally {
            server.shutdownNow();
        }
    }

    @Override
    public void setApplicationContext(final ApplicationContext applicationContext)
            throws BeansException {
        // this.applicationContext = applicationContext;

    }

}