/*
 * 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;
 * 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 Db4objects.Db4o;
using OpenSim.Framework.Configuration;
using OpenSim.Framework.Console;
using OpenSim.Framework.Interfaces;

namespace OpenGrid.Config.GridConfigDb4o
{
    /// <summary>
    /// A grid configuration interface for returning the DB4o Config Provider
    /// </summary>
    public class Db40ConfigPlugin: IGridConfig
    {
        private static readonly log4net.ILog m_log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

        /// <summary>
        /// Loads and returns a configuration objeect
        /// </summary>
        /// <returns>A grid configuration object</returns>
        public GridConfig GetConfigObject()
        {
            m_log.Info("[DBGRIDCONFIG]: Loading Db40Config dll");
            return new DbGridConfig();
        }
    }

    /// <summary>
    /// A DB4o based Gridserver configuration object
    /// </summary>
    public class DbGridConfig : GridConfig
    {
        /// <summary>
        /// The DB4o Database
        /// </summary>
        private IObjectContainer db;

        /// <summary>
        /// User configuration for the Grid Config interfaces
        /// </summary>
        public void LoadDefaults()
        {
            MainConsole.Instance.Info("DbGridConfig.cs:LoadDefaults() - Please press enter to retain default or enter new settings");

            // About the grid options
            this.GridOwner = MainConsole.Instance.CmdPrompt("Grid owner", "OGS development team");

            // Asset Options
            this.DefaultAssetServer = MainConsole.Instance.CmdPrompt("Default asset server","http://127.0.0.1:" + AssetConfig.DefaultHttpPort.ToString() + "/");
            this.AssetSendKey = MainConsole.Instance.CmdPrompt("Key to send to asset server","null");
            this.AssetRecvKey = MainConsole.Instance.CmdPrompt("Key to expect from asset server","null");

            // User Server Options
            this.DefaultUserServer = MainConsole.Instance.CmdPrompt("Default user server","http://127.0.0.1:" + UserConfig.DefaultHttpPort.ToString() + "/");
            this.UserSendKey = MainConsole.Instance.CmdPrompt("Key to send to user server","null");
            this.UserRecvKey = MainConsole.Instance.CmdPrompt("Key to expect from user server","null");

            // Region Server Options
            this.SimSendKey = MainConsole.Instance.CmdPrompt("Key to send to sims","null");
            this.SimRecvKey = MainConsole.Instance.CmdPrompt("Key to expect from sims","null");
        }

        /// <summary>
        /// Initialises a new configuration object
        /// </summary>
        public override void InitConfig()
        {
            try
            {
                // Perform Db4o initialisation
                db = Db4oFactory.OpenFile("opengrid.yap");

                // Locate the grid configuration object
                IObjectSet result = db.Get(typeof(DbGridConfig));
                // Found?
                if (result.Count==1)
                {
                    m_log.Info("[DBGRIDCONFIG]: Found a GridConfig object in the local database, loading");
                    foreach (DbGridConfig cfg in result)
                    {
                        // Import each setting into this class
                        // Grid Settings
                        this.GridOwner=cfg.GridOwner;
                        // Asset Settings
                        this.DefaultAssetServer=cfg.DefaultAssetServer;
                        this.AssetSendKey=cfg.AssetSendKey;
                        this.AssetRecvKey=cfg.AssetRecvKey;
                        // User Settings
                        this.DefaultUserServer=cfg.DefaultUserServer;
                        this.UserSendKey=cfg.UserSendKey;
                        this.UserRecvKey=cfg.UserRecvKey;
                        // Region Settings
                        this.SimSendKey=cfg.SimSendKey;
                        this.SimRecvKey=cfg.SimRecvKey;
                    }
                    // Create a new configuration object from this class
                }
                else
                {
                    m_log.Info("[DBGRIDCONFIG]: Could not find object in database, loading precompiled defaults");

                    // Load default settings into this class
                    LoadDefaults();

                    // Saves to the database file...
                    m_log.Info("[DBGRIDCONFIG]: Writing out default settings to local database");
                    db.Set(this);

                    // Closes file locks
                    db.Close();
                }
            }
            catch(Exception e)
            {
                m_log.Warn("DbGridConfig.cs:InitConfig() - Exception occured");
                m_log.Warn(e.ToString());
            }

            // Grid Settings
            m_log.Info("[DBGRIDCONFIG]: Grid settings loaded:");
            m_log.Info("[DBGRIDCONFIG]: Grid owner: " + this.GridOwner);

            // Asset Settings
            m_log.Info("[DBGRIDCONFIG]: Default asset server: " + this.DefaultAssetServer);
            m_log.Info("[DBGRIDCONFIG]: Key to send to asset server: " + this.AssetSendKey);
            m_log.Info("[DBGRIDCONFIG]: Key to expect from asset server: " + this.AssetRecvKey);

            // User Settings
            m_log.Info("[DBGRIDCONFIG]: Default user server: " + this.DefaultUserServer);
            m_log.Info("[DBGRIDCONFIG]: Key to send to user server: " + this.UserSendKey);
            m_log.Info("[DBGRIDCONFIG]: Key to expect from user server: " + this.UserRecvKey);

            // Region Settings
            m_log.Info("[DBGRIDCONFIG]: Key to send to sims: " + this.SimSendKey);
            m_log.Info("[DBGRIDCONFIG]: Key to expect from sims: " + this.SimRecvKey);
        }

        /// <summary>
        /// Closes down the database and releases filesystem locks
        /// </summary>
        public void Shutdown()
        {
            db.Close();
        }
    }
}
