/*
 * 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 OpenSim 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 System.Data;
using System.Data.SqlClient;
using System.Reflection;
using libsecondlife;
using log4net;
using OpenSim.Framework;

namespace OpenSim.Data.MSSQL
{
    internal class MSSQLAssetData : AssetDataBase
    {
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        private MSSQLManager database;

        #region IAssetProvider Members

        private void UpgradeAssetsTable(string tableName)
        {
            // null as the version, indicates that the table didn't exist
            if (tableName == null)
            {
                m_log.Info("[ASSET DB]: Creating new database tables");
                database.ExecuteResourceSql("CreateAssetsTable.sql");
                return;
            }
        }

        /// <summary>
        /// Ensure that the assets related tables exists and are at the latest version
        /// </summary>
        private void TestTables()
        {
            Dictionary<string, string> tableList = new Dictionary<string, string>();

            tableList["assets"] = null;
            database.GetTableVersion(tableList);

            UpgradeAssetsTable(tableList["assets"]);
        }

        override public AssetBase FetchAsset(LLUUID assetID)
        {
            AssetBase asset = null;

            Dictionary<string, string> param = new Dictionary<string, string>();
            param["id"] = assetID.ToString();

            IDbCommand result = database.Query("SELECT * FROM assets WHERE id = @id", param);
            IDataReader reader = result.ExecuteReader();

            asset = database.getAssetRow(reader);
            reader.Close();
            result.Dispose();

            return asset;
        }

        override public void CreateAsset(AssetBase asset)
        {
            if (ExistsAsset((LLUUID) asset.FullID))
            {
                return;
            }


            SqlCommand cmd =
                new SqlCommand(
                    "INSERT INTO assets ([id], [name], [description], [assetType], [invType], [local], [temporary], [data])" +
                    " VALUES " +
                    "(@id, @name, @description, @assetType, @invType, @local, @temporary, @data)",
                    database.getConnection());

            using (cmd)
            {
                //SqlParameter p = cmd.Parameters.Add("id", SqlDbType.NVarChar);
                //p.Value = asset.FullID.ToString();
                cmd.Parameters.AddWithValue("id", asset.FullID.ToString());
                cmd.Parameters.AddWithValue("name", asset.Name);
                cmd.Parameters.AddWithValue("description", asset.Description);
                SqlParameter e = cmd.Parameters.Add("assetType", SqlDbType.TinyInt);
                e.Value = asset.Type;
                SqlParameter f = cmd.Parameters.Add("invType", SqlDbType.TinyInt);
                f.Value = asset.InvType;
                SqlParameter g = cmd.Parameters.Add("local", SqlDbType.TinyInt);
                g.Value = asset.Local;
                SqlParameter h = cmd.Parameters.Add("temporary", SqlDbType.TinyInt);
                h.Value = asset.Temporary;
                SqlParameter i = cmd.Parameters.Add("data", SqlDbType.Image);
                i.Value = asset.Data;
                try
                {
                    cmd.ExecuteNonQuery();
                }
                catch (Exception)
                {
                    throw;
                }

                cmd.Dispose();
            }
        }


        override public void UpdateAsset(AssetBase asset)
        {
            SqlCommand command = new SqlCommand("UPDATE assets set id = @id, " +
                                                "name = @name, " +
                                                "description = @description," +
                                                "assetType = @assetType," +
                                                "invType = @invType," +
                                                "local = @local," +
                                                "temporary = @temporary," +
                                                "data = @data where " +
                                                "id = @keyId;", database.getConnection());
            SqlParameter param1 = new SqlParameter("@id", asset.FullID.ToString());
            SqlParameter param2 = new SqlParameter("@name", asset.Name);
            SqlParameter param3 = new SqlParameter("@description", asset.Description);
            SqlParameter param4 = new SqlParameter("@assetType", asset.Type);
            SqlParameter param5 = new SqlParameter("@invType", asset.InvType);
            SqlParameter param6 = new SqlParameter("@local", asset.Local);
            SqlParameter param7 = new SqlParameter("@temporary", asset.Temporary);
            SqlParameter param8 = new SqlParameter("@data", asset.Data);
            SqlParameter param9 = new SqlParameter("@keyId", asset.FullID.ToString());
            command.Parameters.Add(param1);
            command.Parameters.Add(param2);
            command.Parameters.Add(param3);
            command.Parameters.Add(param4);
            command.Parameters.Add(param5);
            command.Parameters.Add(param6);
            command.Parameters.Add(param7);
            command.Parameters.Add(param8);
            command.Parameters.Add(param9);

            try
            {
                command.ExecuteNonQuery();
            }
            catch (Exception e)
            {
                m_log.Error(e.ToString());
            }
        }

        override public bool ExistsAsset(LLUUID uuid)
        {
            if (FetchAsset(uuid) != null)
            {
                return true;
            }
            return false;
        }

        /// <summary>
        /// All writes are immediately commited to the database, so this is a no-op
        /// </summary>
        override public void CommitAssets()
        {
        }

        #endregion

        #region IPlugin Members

        override public void Initialise(string connect)
        {
            // TODO: this would allow you to pass in connnect info as
            // a string instead of file, if someone writes the support
            Initialise();
        }

        override public void Initialise()
        {
            IniFile GridDataMySqlFile = new IniFile("mssql_connection.ini");
            string settingDataSource = GridDataMySqlFile.ParseFileReadValue("data_source");
            string settingInitialCatalog = GridDataMySqlFile.ParseFileReadValue("initial_catalog");
            string settingPersistSecurityInfo = GridDataMySqlFile.ParseFileReadValue("persist_security_info");
            string settingUserId = GridDataMySqlFile.ParseFileReadValue("user_id");
            string settingPassword = GridDataMySqlFile.ParseFileReadValue("password");

            database =
                new MSSQLManager(settingDataSource, settingInitialCatalog, settingPersistSecurityInfo, settingUserId,
                                 settingPassword);

            TestTables();
        }

        override public string Version
        {
//            get { return database.getVersion(); }
            get { return database.getVersion(); }
        }

        override public string Name
        {
            get { return "MSSQL Asset storage engine"; }
        }

        #endregion
    }
}
