//
//  ========================================================================
//  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
//
//      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.websocket.server.helper;

import java.io.IOException;
import java.util.List;
import java.util.Map;

import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
import org.eclipse.jetty.websocket.api.BatchMode;
import org.eclipse.jetty.websocket.api.RemoteEndpoint;
import org.eclipse.jetty.websocket.api.Session;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketConnect;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketError;
import org.eclipse.jetty.websocket.api.annotations.OnWebSocketMessage;
import org.eclipse.jetty.websocket.api.annotations.WebSocket;

@WebSocket
public class SessionSocket
{
    private static final Logger LOG = Log.getLogger(SessionSocket.class);
    private Session session;

    @OnWebSocketConnect
    public void onConnect(Session sess)
    {
        this.session = sess;
    }

    @OnWebSocketMessage
    public void onText(String message)
    {
        LOG.debug("onText({})", message);
        if (message == null)
        {
            return;
        }

        try
        {
            if (message.startsWith("getParameterMap"))
            {
                Map<String, List<String>> parameterMap = session.getUpgradeRequest().getParameterMap();

                int idx = message.indexOf('|');
                String key = message.substring(idx + 1);
                List<String> values = parameterMap.get(key);

                if (values == null)
                {
                    sendString("<null>");
                    return;
                }

                StringBuilder valueStr = new StringBuilder();
                valueStr.append('[');
                boolean delim = false;
                for (String value : values)
                {
                    if (delim)
                    {
                        valueStr.append(", ");
                    }
                    valueStr.append(value);
                    delim = true;
                }
                valueStr.append(']');
                LOG.debug("valueStr = {}", valueStr);
                sendString(valueStr.toString());
                return;
            }

            if ("session.isSecure".equals(message))
            {
                String issecure = String.format("session.isSecure=%b", session.isSecure());
                sendString(issecure);
                return;
            }

            if ("session.upgradeRequest.requestURI".equals(message))
            {
                String response = String.format("session.upgradeRequest.requestURI=%s", session.getUpgradeRequest().getRequestURI().toASCIIString());
                sendString(response);
                return;
            }

            if ("harsh-disconnect".equals(message))
            {
                session.disconnect();
                return;
            }

            // echo the message back.
            sendString(message);
        }
        catch (Throwable t)
        {
            LOG.warn(t);
        }
    }

    @OnWebSocketError
    public void onError(Throwable cause)
    {
        if (LOG.isDebugEnabled())
        {
            LOG.debug("onError()", cause);
        }
    }

    protected void sendString(String text) throws IOException
    {
        RemoteEndpoint remote = session.getRemote();
        remote.sendString(text, null);
        if (remote.getBatchMode() == BatchMode.ON)
            remote.flush();
    }
}
