/*
 * 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.Reflection;
using System.Net;
using Nini.Config;
using OpenSim.Framework;
using OpenSim.Server.Base;
using OpenSim.Services.Interfaces;
using OpenSim.Framework.Servers.HttpServer;
using OpenSim.Server.Handlers.Base;
using GridRegion = OpenSim.Services.Interfaces.GridRegion;

using OpenMetaverse;
using log4net;
using Nwc.XmlRpc;

namespace OpenSim.Server.Handlers.Hypergrid
{
    public class GatekeeperServiceInConnector : ServiceConnector
    {
        private static readonly ILog m_log =
                LogManager.GetLogger(
                MethodBase.GetCurrentMethod().DeclaringType);

        private IGatekeeperService m_GatekeeperService;

        public GatekeeperServiceInConnector(IConfigSource config, IHttpServer server, ISimulationService simService) :
                base(config, server, String.Empty)
        {
            IConfig gridConfig = config.Configs["GatekeeperService"];
            if (gridConfig != null)
            {
                string serviceDll = gridConfig.GetString("LocalServiceModule", string.Empty);
                Object[] args = new Object[] { config, simService };
                m_GatekeeperService = ServerUtils.LoadPlugin<IGatekeeperService>(serviceDll, args);
            }
            if (m_GatekeeperService == null)
                throw new Exception("Gatekeeper server connector cannot proceed because of missing service");

            server.AddXmlRPCHandler("link_region", LinkRegionRequest, false);
            server.AddXmlRPCHandler("get_region", GetRegion, false);
        }

        public GatekeeperServiceInConnector(IConfigSource config, IHttpServer server)
            : this(config, server, null)
        {
        }

        /// <summary>
        /// Someone wants to link to us
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        public XmlRpcResponse LinkRegionRequest(XmlRpcRequest request, IPEndPoint remoteClient)
        {
            Hashtable requestData = (Hashtable)request.Params[0];
            //string host = (string)requestData["host"];
            //string portstr = (string)requestData["port"];
            string name = (string)requestData["region_name"];

            m_log.DebugFormat("[HGrid]: Hyperlink request");

            UUID regionID = UUID.Zero;
            string imageURL = string.Empty;
            ulong regionHandle = 0;
            string reason = string.Empty;
            
            bool success = m_GatekeeperService.LinkRegion(name, out regionID, out regionHandle, out imageURL, out reason);

            Hashtable hash = new Hashtable();
            hash["result"] = success.ToString();
            hash["uuid"] = regionID.ToString();
            hash["handle"] = regionHandle.ToString();
            hash["region_image"] = imageURL;

            XmlRpcResponse response = new XmlRpcResponse();
            response.Value = hash;
            return response;
        }

        public XmlRpcResponse GetRegion(XmlRpcRequest request, IPEndPoint remoteClient)
        {
            Hashtable requestData = (Hashtable)request.Params[0];
            //string host = (string)requestData["host"];
            //string portstr = (string)requestData["port"];
            string regionID_str = (string)requestData["regionID"];
            UUID regionID = UUID.Zero;
            UUID.TryParse(regionID_str, out regionID);

            GridRegion regInfo = m_GatekeeperService.GetHyperlinkRegion(regionID);

            Hashtable hash = new Hashtable();
            if (regInfo == null)
                hash["result"] = "false";
            else
            {
                hash["result"] = "true";
                hash["uuid"] = regInfo.RegionID.ToString();
                hash["x"] = regInfo.RegionLocX.ToString();
                hash["y"] = regInfo.RegionLocY.ToString();
                hash["region_name"] = regInfo.RegionName;
                hash["hostname"] = regInfo.ExternalHostName;
                hash["http_port"] = regInfo.HttpPort.ToString();
                hash["internal_port"] = regInfo.InternalEndPoint.Port.ToString();
            }
            XmlRpcResponse response = new XmlRpcResponse();
            response.Value = hash;
            return response;

        }
    }
}