/*
 * 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;
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 * 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.Generic;
using OpenMetaverse;
using OpenSim.Framework.Communications.Cache;

namespace OpenSim.Framework.Communications
{
    /// <summary>
    /// This class manages references to OpenSim non-region services (inventory, user, etc.)
    /// </summary>
    /// 
    /// TODO: Service retrieval needs to be managed via plugin and interfaces requests, as happens for region
    /// modules from scene.  Among other things, this will allow this class to be used in many different contexts
    /// (from a grid service executable, to provide services on a region) without lots of messy nulls and confusion.
    /// Also, a post initialize step on the plugins will be needed so that we don't get tortuous problems with 
    /// circular dependencies between plugins.
    public class CommunicationsManager
    {
        //private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        protected Dictionary<UUID, string[]> m_nameRequestCache = new Dictionary<UUID, string[]>();

        public IUserService UserService
        {
            get { return m_userService; }
        }
        protected IUserService m_userService;

        public UserProfileCacheService UserProfileCacheService
        {
            get { return m_userProfileCacheService; }
        }
        protected UserProfileCacheService m_userProfileCacheService;

        public IAvatarService AvatarService
        {
            get { return m_avatarService; }
        }
        protected IAvatarService m_avatarService;

        public IInterServiceInventoryServices InterServiceInventoryService
        {
            get { return m_interServiceInventoryService; }
        }
        protected IInterServiceInventoryServices m_interServiceInventoryService;

        public NetworkServersInfo NetworkServersInfo
        {
            get { return m_networkServersInfo; }
        }
        protected NetworkServersInfo m_networkServersInfo;
             
        /// <summary>
        /// Interface to user service for administrating users.
        /// </summary>
        public IUserAdminService UserAdminService
        {
            get { return m_userAdminService; }
        }
        protected IUserAdminService m_userAdminService;

        /// <summary>
        /// Constructor
        /// </summary>
        /// <param name="serversInfo"></param>
        public CommunicationsManager(NetworkServersInfo serversInfo,
                                     LibraryRootFolder libraryRootFolder)
        {
            m_networkServersInfo = serversInfo;
            m_userProfileCacheService = new UserProfileCacheService(this, libraryRootFolder);
        }



        /// <summary>
        /// Logs off a user and does the appropriate communications
        /// </summary>
        /// <param name="userid"></param>
        /// <param name="regionid"></param>
        /// <param name="regionhandle"></param>
        /// <param name="position"></param>
        /// <param name="lookat"></param>
        public void LogOffUser(UUID userid, UUID regionid, ulong regionhandle, Vector3 position, Vector3 lookat)
        {
            m_userService.LogOffUser(userid, regionid, regionhandle, position, lookat);
        }

        /// <summary>
        /// Logs off a user and does the appropriate communications (deprecated as of 2008-08-27)
        /// </summary>
        /// <param name="userid"></param>
        /// <param name="regionid"></param>
        /// <param name="regionhandle"></param>
        /// <param name="posx"></param>
        /// <param name="posy"></param>
        /// <param name="posz"></param>
        public void LogOffUser(UUID userid, UUID regionid, ulong regionhandle, float posx, float posy, float posz)
        {
            m_userService.LogOffUser(userid, regionid, regionhandle, posx, posy, posz);
        }


        #region Packet Handlers

        public void UpdateAvatarPropertiesRequest(IClientAPI remote_client, UserProfileData UserProfile)
        {
            m_userService.UpdateUserProfile(UserProfile);
            return;
        }

        public void HandleUUIDNameRequest(UUID uuid, IClientAPI remote_client)
        {
            if (uuid == m_userProfileCacheService.LibraryRoot.Owner)
            {
                remote_client.SendNameReply(uuid, "Mr", "OpenSim");
            }
            else
            {
                string[] names = doUUIDNameRequest(uuid);
                if (names.Length == 2)
                {
                    remote_client.SendNameReply(uuid, names[0], names[1]);
                }

            }
        }

        private string[] doUUIDNameRequest(UUID uuid)
        {
            lock (m_nameRequestCache)
            {
                if (m_nameRequestCache.ContainsKey(uuid))
                    return m_nameRequestCache[uuid];
            }

            string[] returnstring = new string[0];
            CachedUserInfo uinfo = UserProfileCacheService.GetUserDetails(uuid);

            if ((uinfo != null) && (uinfo.UserProfile != null))
            {
                returnstring = new string[2];
                returnstring[0] = uinfo.UserProfile.FirstName;
                returnstring[1] = uinfo.UserProfile.SurName;
                lock (m_nameRequestCache)
                {
                    if (!m_nameRequestCache.ContainsKey(uuid))
                        m_nameRequestCache.Add(uuid, returnstring);
                }
            }
            
            return returnstring;
        }

        public bool UUIDNameCachedTest(UUID uuid)
        {
            lock (m_nameRequestCache)
                return m_nameRequestCache.ContainsKey(uuid);
        }

        public string UUIDNameRequestString(UUID uuid)
        {
            string[] names = doUUIDNameRequest(uuid);
            if (names.Length == 2)
            {
                string firstname = names[0];
                string lastname = names[1];

                return firstname + " " + lastname;

            }
            return "(hippos)";
        }

        public List<AvatarPickerAvatar> GenerateAgentPickerRequestResponse(UUID queryID, string query)
        {
            List<AvatarPickerAvatar> pickerlist = m_userService.GenerateAgentPickerRequestResponse(queryID, query);
            return pickerlist;
        }

        #endregion
    }
}