/*
* Copyright (c) OpenSim project, http://sim.opensecondlife.org/
*
* 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 <organization> 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 <copyright holder> 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.Generic;
using System.Text;
using Db4objects.Db4o;
using OpenGrid.Framework.Data;
using libsecondlife;

namespace OpenGrid.Framework.Data.DB4o
{
    /// <summary>
    /// A Database manager for Db4o
    /// </summary>
    class DB4oGridManager
    {
        /// <summary>
        /// A list of the current regions connected (in-memory cache)
        /// </summary>
        public Dictionary<LLUUID, SimProfileData> simProfiles = new Dictionary<LLUUID, SimProfileData>();
        /// <summary>
        /// Database File Name
        /// </summary>
        string dbfl;

        /// <summary>
        /// Creates a new grid storage manager
        /// </summary>
        /// <param name="db4odb">Filename to the database file</param>
        public DB4oGridManager(string db4odb)
        {
            dbfl = db4odb;
            IObjectContainer database;
            database = Db4oFactory.OpenFile(dbfl);
            IObjectSet result = database.Get(typeof(SimProfileData));
            // Loads the file into the in-memory cache
            foreach(SimProfileData row in result) {
                simProfiles.Add(row.UUID, row);
            }
            database.Close();
        }

        /// <summary>
        /// Adds a new profile to the database (Warning: Probably slow.)
        /// </summary>
        /// <param name="row">The profile to add</param>
        /// <returns>Successful?</returns>
        public bool AddRow(SimProfileData row)
        {
            if (simProfiles.ContainsKey(row.UUID))
            {
                simProfiles[row.UUID] = row;
            }
            else
            {
                simProfiles.Add(row.UUID, row);
            }

            try
            {
                IObjectContainer database;
                database = Db4oFactory.OpenFile(dbfl);
                database.Set(row);
                database.Close();
                return true;
            }
            catch (Exception e)
            {
                return false;
            }
        }


    }

    /// <summary>
    /// A manager for the DB4o database (user profiles)
    /// </summary>
    class DB4oUserManager
    {
        /// <summary>
        /// A list of the user profiles (in memory cache)
        /// </summary>
        public Dictionary<LLUUID, UserProfileData> userProfiles = new Dictionary<LLUUID, UserProfileData>();
        /// <summary>
        /// Database filename
        /// </summary>
        string dbfl;

        /// <summary>
        /// Initialises a new DB manager
        /// </summary>
        /// <param name="db4odb">The filename to the database</param>
        public DB4oUserManager(string db4odb)
        {
            dbfl = db4odb;
            IObjectContainer database;
            database = Db4oFactory.OpenFile(dbfl);
            // Load to cache
            IObjectSet result = database.Get(typeof(UserProfileData));
            foreach (UserProfileData row in result)
            {
                userProfiles.Add(row.UUID, row);
            }
            database.Close();
        }

        /// <summary>
        /// Adds a new profile to the database (Warning: Probably slow.)
        /// </summary>
        /// <param name="row">The profile to add</param>
        /// <returns>Successful?</returns>
        public bool AddRow(UserProfileData row)
        { 
            if (userProfiles.ContainsKey(row.UUID))
            {
                userProfiles[row.UUID] = row;
            }
            else
            {
                userProfiles.Add(row.UUID, row);
            }

            try
            {
                IObjectContainer database;
                database = Db4oFactory.OpenFile(dbfl);
                database.Set(row);
                database.Close();
                return true;
            }
            catch (Exception e)
            {
                return false;
            }
        }


    }
}