/*
 * 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.Text;
using OpenMetaverse;
using log4net;
using Nini.Config;
using OpenSim.Services.Base;
using OpenSim.Services.Interfaces;
using OpenSim.Data;
using OpenSim.Framework;

namespace OpenSim.Services.EstateService
{
    public class MuteListService : ServiceBase, IMuteListService
    {
//        private static readonly ILog m_log =
//                LogManager.GetLogger(
//                MethodBase.GetCurrentMethod().DeclaringType);

        protected IMuteListData m_database;

        public MuteListService(IConfigSource config)
            : base(config)
        {
            string dllName = String.Empty;
            string connString = String.Empty;

            // Try reading the [DatabaseService] section, if it exists
            IConfig dbConfig = config.Configs["DatabaseService"];
            if (dbConfig != null)
            {
                dllName = dbConfig.GetString("StorageProvider", String.Empty);
                connString = dbConfig.GetString("ConnectionString", String.Empty);
                connString = dbConfig.GetString("MuteConnectionString", connString);
            }

            // Try reading the [MuteListStore] section, if it exists
            IConfig muteConfig = config.Configs["MuteListStore"];
            if (muteConfig != null)
            {
                dllName = muteConfig.GetString("StorageProvider", dllName);
                connString = muteConfig.GetString("ConnectionString", connString);
            }

            // We tried, but this doesn't exist. We can't proceed
            if (dllName.Length == 0)
                throw new Exception("No StorageProvider configured");

            m_database = LoadPlugin<IMuteListData>(dllName, new Object[] { connString });
            if (m_database == null)
                throw new Exception("Could not find a storage interface in the given module");
        }

        public Byte[] MuteListRequest(UUID agentID, uint crc)
        {
            if(m_database == null)
                return null;

            MuteData[] data = m_database.Get(agentID);
            if (data == null || data.Length == 0)
                return Array.Empty<byte>();

            StringBuilder sb = new StringBuilder(16384);
            foreach (MuteData d in data)
                sb.AppendFormat("{0} {1} {2}|{3}\n",
                        d.MuteType,
                        d.MuteID.ToString(),
                        d.MuteName,
                        d.MuteFlags);

            Byte[] filedata = Util.UTF8.GetBytes(sb.ToString());

            uint dataCrc = Crc32.Compute(filedata);

            if (dataCrc == crc)
            {
                if(crc == 0)
                     return Array.Empty<byte>();

                Byte[] ret = new Byte[1] {1};
                return ret;
            }

            return filedata;
        }

        public bool UpdateMute(MuteData mute)
        {
            if(m_database == null)
                return false;
            return m_database.Store(mute);
        }

        public bool RemoveMute(UUID agentID, UUID muteID, string muteName)
        {
            if(m_database == null)
                return false;
            return m_database.Delete(agentID, muteID, muteName);
        }
    }
}