/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates
 * and other contributors as indicated by the @author tags.
 *
 * 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.keycloak.example.oauth;

import org.jboss.logging.Logger;
import org.keycloak.servlet.ServletOAuthClient;
import org.keycloak.servlet.ServletOAuthClientBuilder;

import javax.inject.Inject;
import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;

/**
 * @author <a href="mailto:mposolda@redhat.com">Marek Posolda</a>
 */
@WebListener
public class AppContextListener implements ServletContextListener {

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

    @Inject
    private ServletOAuthClient oauthClient;

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        ServletContext context = sce.getServletContext();

        InputStream is = null;
        String path = context.getInitParameter("keycloak.config.file");
        if (path == null) {
            is = context.getResourceAsStream("/WEB-INF/keycloak.json");
        } else {
            try {
                is = new FileInputStream(path);
            } catch (FileNotFoundException e) {
                throw new RuntimeException(e);
            }
        }
        ServletOAuthClientBuilder.build(is, oauthClient);
        logger.info("OAuth client configured and started");
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        oauthClient.stop();
        logger.info("OAuth client stopped");
    }
}