//
//  ========================================================================
//  Copyright (c) 1995-2019 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.hazelcast.session;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.eclipse.jetty.client.HttpClient;
import org.eclipse.jetty.client.api.ContentResponse;
import org.eclipse.jetty.client.api.Request;
import org.eclipse.jetty.server.HttpConnectionFactory;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.server.session.DefaultSessionCache;
import org.eclipse.jetty.server.session.SessionContext;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

public class TestHazelcastSessions
{
    public static class TestServlet
        extends HttpServlet
    {

        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException
        {
            String arg = req.getParameter("action");
            if (arg == null)
            {
                return;
            }
            HttpSession s = null;
            if ("set".equals(arg))
            {
                s = req.getSession(true);
                assertNotNull(s);
                s.setAttribute("val", req.getParameter("value"));
            }
            else if ("get".equals(arg))
            {
                s = req.getSession(false);
                System.err.println("GET: s=" + s + ",id=" + (s != null ? s.getId() : ""));
            }
            else if ("del".equals(arg))
            {
                s = req.getSession();
                assertNotNull(s);
                s.invalidate();
                s = null;
            }

            resp.setContentType("text/html");
            PrintWriter w = resp.getWriter();
            if (s == null)
            {
                w.write("No session");
            }
            else
            {
                w.write((String)s.getAttribute("val"));
            }
        }
    }

    private HazelcastSessionDataStore hazelcastSessionDataStore;
    private HazelcastSessionDataStoreFactory hazelcastSessionDataStoreFactory;

    private Server server;

    private ServerConnector serverConnector;

    String contextPath = "/";

    @BeforeEach
    public void initialize()
        throws Exception
    {

        server = new Server();
        serverConnector = new ServerConnector(server, new HttpConnectionFactory());
        server.addConnector(serverConnector);

        ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
        context.setContextPath(contextPath);
        context.setResourceBase(System.getProperty("java.io.tmpdir"));
        server.setHandler(context);

        SessionContext sessionContext = new SessionContext("foo", null);

        hazelcastSessionDataStoreFactory = new HazelcastSessionDataStoreFactory();
        hazelcastSessionDataStore = (HazelcastSessionDataStore)hazelcastSessionDataStoreFactory.getSessionDataStore(
            context.getSessionHandler());
        hazelcastSessionDataStore.initialize(sessionContext);

        DefaultSessionCache defaultSessionCache = new DefaultSessionCache(context.getSessionHandler());
        defaultSessionCache.setSessionDataStore(hazelcastSessionDataStore);
        context.getSessionHandler().setSessionCache(defaultSessionCache);
        // Add a test servlet
        context.addServlet(new ServletHolder(new TestServlet()), contextPath);

        server.start();
    }

    @AfterEach
    public void shutdown()
        throws Exception
    {
        hazelcastSessionDataStoreFactory.getHazelcastInstance().shutdown();
        server.stop();
    }

    @Test
    public void testHazelcast()
        throws Exception
    {

        int port = serverConnector.getLocalPort();
        HttpClient client = new HttpClient();
        client.start();
        try
        {
            int value = 42;
            ContentResponse response =
                client.GET("http://localhost:" + port + contextPath + "?action=set&value=" + value);
            assertEquals(HttpServletResponse.SC_OK, response.getStatus());
            String sessionCookie = response.getHeaders().get("Set-Cookie");
            assertTrue(sessionCookie != null);
            // Mangle the cookie, replacing Path with $Path, etc.
            sessionCookie = sessionCookie.replaceFirst("(\\W)(P|p)ath=", "$1\\$Path=");

            String resp = response.getContentAsString();
            assertEquals(resp.trim(), String.valueOf(value));

            // Be sure the session value is still there
            Request request = client.newRequest("http://localhost:" + port + contextPath + "?action=get");
            request.header("Cookie", sessionCookie);
            response = request.send();
            assertEquals(HttpServletResponse.SC_OK, response.getStatus());

            resp = response.getContentAsString();
            assertEquals(String.valueOf(value), resp.trim());

            //Delete the session
            request = client.newRequest("http://localhost:" + port + contextPath + "?action=del");
            request.header("Cookie", sessionCookie);
            response = request.send();
            assertEquals(HttpServletResponse.SC_OK, response.getStatus());

            //Check that the session is gone
            request = client.newRequest("http://localhost:" + port + contextPath + "?action=get");
            request.header("Cookie", sessionCookie);
            response = request.send();
            assertEquals(HttpServletResponse.SC_OK, response.getStatus());
            resp = response.getContentAsString();
            assertEquals("No session", resp.trim());
        }
        finally
        {
            client.stop();
        }
    }
}
