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//  Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others.
//  ------------------------------------------------------------------------
//  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
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//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
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//  You may elect to redistribute this code under either of these licenses.
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package org.eclipse.jetty.websocket.server.misbehaving;

import java.nio.channels.ClosedChannelException;
import java.util.concurrent.Future;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;

import org.eclipse.jetty.http.HttpHeader;
import org.eclipse.jetty.util.log.StacklessLogging;
import org.eclipse.jetty.websocket.api.StatusCode;
import org.eclipse.jetty.websocket.common.CloseInfo;
import org.eclipse.jetty.websocket.common.OpCode;
import org.eclipse.jetty.websocket.common.WebSocketFrame;
import org.eclipse.jetty.websocket.common.WebSocketSession;
import org.eclipse.jetty.websocket.common.test.BlockheadClient;
import org.eclipse.jetty.websocket.common.test.BlockheadClientRequest;
import org.eclipse.jetty.websocket.common.test.BlockheadConnection;
import org.eclipse.jetty.websocket.common.test.Timeouts;
import org.eclipse.jetty.websocket.server.SimpleServletServer;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.greaterThanOrEqualTo;
import static org.hamcrest.Matchers.instanceOf;
import static org.hamcrest.Matchers.is;

/**
 * Testing badly behaving Socket class implementations to get the best
 * error messages and state out of the websocket implementation.
 */
public class MisbehavingClassTest
{
    private static SimpleServletServer server;
    private static BadSocketsServlet badSocketsServlet;
    private static BlockheadClient client;

    @BeforeAll
    public static void startServer() throws Exception
    {
        badSocketsServlet = new BadSocketsServlet();
        server = new SimpleServletServer(badSocketsServlet);
        server.start();
    }

    @AfterAll
    public static void stopServer()
    {
        server.stop();
    }

    @BeforeAll
    public static void startClient() throws Exception
    {
        client = new BlockheadClient();
        client.setIdleTimeout(TimeUnit.SECONDS.toMillis(2));
        client.start();
    }

    @AfterAll
    public static void stopClient() throws Exception
    {
        client.stop();
    }

    @Test
    public void testListenerRuntimeOnConnect() throws Exception
    {
        BlockheadClientRequest request = client.newWsRequest(server.getServerUri());
        request.header(HttpHeader.SEC_WEBSOCKET_SUBPROTOCOL, "listener-runtime-connect");
        request.idleTimeout(1, TimeUnit.SECONDS);

        ListenerRuntimeOnConnectSocket socket = badSocketsServlet.listenerRuntimeConnect;
        socket.reset();

        Future<BlockheadConnection> connFut = request.sendAsync();

        try (StacklessLogging ignore = new StacklessLogging(ListenerRuntimeOnConnectSocket.class, WebSocketSession.class);
             BlockheadConnection clientConn = connFut.get(Timeouts.CONNECT, Timeouts.CONNECT_UNIT))
        {
            LinkedBlockingQueue<WebSocketFrame> frames = clientConn.getFrameQueue();
            WebSocketFrame frame = frames.poll(Timeouts.POLL_EVENT, Timeouts.POLL_EVENT_UNIT);
            assertThat("frames[0].opcode", frame.getOpCode(), is(OpCode.CLOSE));
            CloseInfo close = new CloseInfo(frame);
            assertThat("Close Status Code", close.getStatusCode(), is(StatusCode.SERVER_ERROR));

            clientConn.write(close.asFrame()); // respond with close

            // ensure server socket got close event
            assertThat("Close Latch", socket.closeLatch.await(1, TimeUnit.SECONDS), is(true));
            assertThat("closeStatusCode", socket.closeStatusCode, is(StatusCode.SERVER_ERROR));

            // Validate errors (must be "java.lang.RuntimeException: Intentional Exception from onWebSocketConnect")
            assertThat("socket.onErrors", socket.errors.size(), greaterThanOrEqualTo(1));
            Throwable cause = socket.errors.pop();
            assertThat("Error type", cause, instanceOf(RuntimeException.class));
            // ... with optional ClosedChannelException
            cause = socket.errors.peek();
            if (cause != null)
                assertThat("Error type", cause, instanceOf(ClosedChannelException.class));
        }
    }

    @Test
    public void testAnnotatedRuntimeOnConnect() throws Exception
    {
        BlockheadClientRequest request = client.newWsRequest(server.getServerUri());
        request.header(HttpHeader.SEC_WEBSOCKET_SUBPROTOCOL, "annotated-runtime-connect");
        request.idleTimeout(1, TimeUnit.SECONDS);

        AnnotatedRuntimeOnConnectSocket socket = badSocketsServlet.annotatedRuntimeConnect;
        socket.reset();

        Future<BlockheadConnection> connFut = request.sendAsync();

        try (StacklessLogging ignore = new StacklessLogging(AnnotatedRuntimeOnConnectSocket.class /*, WebSocketSession.class*/);
             BlockheadConnection clientConn = connFut.get(Timeouts.CONNECT, Timeouts.CONNECT_UNIT))
        {
            LinkedBlockingQueue<WebSocketFrame> frames = clientConn.getFrameQueue();
            WebSocketFrame frame = frames.poll(Timeouts.POLL_EVENT, Timeouts.POLL_EVENT_UNIT);
            assertThat("frames[0].opcode", frame.getOpCode(), is(OpCode.CLOSE));
            CloseInfo close = new CloseInfo(frame);
            assertThat("Close Status Code", close.getStatusCode(), is(StatusCode.SERVER_ERROR));

            clientConn.write(close.asFrame()); // respond with close

            // ensure server socket got close event
            assertThat("Close Latch", socket.closeLatch.await(1, TimeUnit.SECONDS), is(true));
            assertThat("closeStatusCode", socket.closeStatusCode, is(StatusCode.SERVER_ERROR));

            // Validate errors (must be "java.lang.RuntimeException: Intentional Exception from onWebSocketConnect")
            assertThat("socket.onErrors", socket.errors.size(), greaterThanOrEqualTo(1));
            Throwable cause = socket.errors.pop();
            assertThat("Error type", cause, instanceOf(RuntimeException.class));
            // ... with optional ClosedChannelException
            cause = socket.errors.peek();
            if (cause != null)
                assertThat("Error type", cause, instanceOf(ClosedChannelException.class));
        }
    }
}
