/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSimulator Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Reflection;
using System.Security;
using System.Text;
using log4net;
using OpenMetaverse;
using OpenMetaverse.StructuredData;
using Nini.Config;
using OpenSim.Framework;
using OpenSim.Framework.Servers.HttpServer;
using OpenSim.Server.Handlers.Base;

namespace OpenSim.Server.Handlers.Web
{
    public class WebServerInConnector : ServiceConnector
    {
	// This is all slow and clunky, it's not a real web server, just something to use if you don't want a real one.
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
        private IConfigSource m_Config;
        private Hashtable mime = new Hashtable();
    	private Hashtable ssi = new Hashtable();

        public WebServerInConnector(IConfigSource config, IHttpServer server, string configName) : base(config, server, configName)
        {
            m_Config = config;
            mime.Add(".gz",	"application/gzip");
            mime.Add(".js",	"application/javascript");
            mime.Add(".json",	"application/json");
            mime.Add(".pdf",	"application/pdf");
            mime.Add(".rtf",	"application/rtf");
            mime.Add(".zip",	"application/zip");
            mime.Add(".xz",	"application/x-xz");
            mime.Add(".gif",	"image/gif");
            mime.Add(".png",	"image/png");
            mime.Add(".jp2",	"image/jp2");
            mime.Add(".jpg2",	"image/jp2");
            mime.Add(".jpe",	"image/jpeg");
            mime.Add(".jpg",	"image/jpeg");
            mime.Add(".jpeg",	"image/jpeg");
            mime.Add(".svg",	"image/svg+xml");
            mime.Add(".svgz",	"image/svg+xml");
            mime.Add(".tif",	"image/tiff");
            mime.Add(".tiff",	"image/tiff");
            mime.Add(".css",	"text/css");
            mime.Add(".html",	"text/html");
            mime.Add(".htm",	"text/html");
            mime.Add(".shtml",	"text/html");
//            mime.Add(".md",	"text/markdown");
//            mime.Add(".markdown","text/markdown");
            mime.Add(".txt",	"text/plain");

            IConfig cfg = m_Config.Configs["GridInfoService"];
            string HomeURI = Util.GetConfigVarFromSections<string>(m_Config, "HomeURI", new string[] { "Startup", "Hypergrid" }, String.Empty);
    	    ssi.Add("grid", cfg.GetString("gridname",  "my grid"));
    	    ssi.Add("uri",  cfg.GetString("login", HomeURI));
    	    ssi.Add("version", VersionInfo.Version);
            server.AddHTTPHandler("/web/", WebRequestHandler);
        }

        private Hashtable WebRequestHandler(Hashtable request)
        {
            Hashtable reply = new Hashtable();
            // Looks like we have to jump through hoops to do simple database queries.  B-(
    	    ssi["members"]	= "?";	// SELECT COUNT(PrincipalID) FROM UserAccounts
    	    ssi["inworld"]	= "?";	// SELECT COUNT(UserID) FROM presence_culled;  Includes locals and HGers in world, but not locals HGing.
    					// SELECT COUNT(UserID) FROM users_online;    Includes local online only.
    	    ssi["outworld"]	= "?";	// SELECT COUNT(UserID) FROM hg_traveling_data WHERE GridExternalName != ssi["uri"];	Includes locals that are HGing.
//    	    ssi["hgers"]	= "?";	// This is complex.
    	    ssi["sims"]		= "?";	// SELECT COUNT(uuid) FROM regions
//    	    ssi["month"]	= "?";	// SELECT COUNT(UserID) FROM Presence WHERE LastSeen < one month ago 2017-11-28 09:01:51;  Includes external HGers, and locals on now.

            string reqpath	= (string)	request["uri"];
            string[] query	= (string[])	request["querystringkeys"];
            Hashtable headers	= (Hashtable)	request["headers"];
	    string method	= (string)	request["http-method"];
	    string type		= (string)	request["content-type"];
	    string body		= (string)	request["body"];
	    string file = Path.Combine(Util.webDir(), reqpath.Remove(0, 5));

            reply["int_response_code"] = 200;
            if (File.Exists(file))
            {
        	string m = (string) mime[Path.GetExtension(file).ToLower()];
        	reply["content_type"] = m;
                if ((null == m) || ("text/" != m.Substring(0, 5)))
                {
        	    reply["bin_response_data"] = File.ReadAllBytes(file);
        	}
        	else
        	{
        	    StreamReader csr = File.OpenText(file);
        	    string content = csr.ReadToEnd();
        	    // Slow and wasteful, but I'm expecting only tiny web files, not accessed very often.
        	    foreach (DictionaryEntry v in ssi)
        	    {
        		content = content.Replace("<!--#echo var=\"" + ((string) v.Key) + "\" -->", (string) v.Value);
        	    }
        	    reply["str_response_string"] = content;
        	    csr.Close();
        	}
            }
            else
	    {
		m_log.ErrorFormat("[WEB SERVICE]:  Unable to read {0}.", file);
		reply["int_response_code"] = 404;
		reply["content_type"] = "text/html";
		reply["str_response_string"] = "<html><title>404 Unknown page</title><head></head><body bgcolor=\"black\" text=\"white\" alink=\"red\" link=\"blue\" vlink=\"purple\">" +
		    "404 error, can't find the " + reqpath + " page.<p>&nbsp;</p></body></html>";
	    }

            return reply;
        }

    }
}