/*
* Copyright (c) OpenSim project, http://sim.opensecondlife.org/
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* modification, are permitted provided that the following conditions are met:
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*       documentation and/or other materials provided with the distribution.
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*       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 <copyright holder> ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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*/
using System;
using System.Collections.Generic;
using Db4objects.Db4o;
using Db4objects.Db4o.Query;
using libsecondlife;
using OpenSim.Framework.Interfaces;
using OpenSim.Framework.Assets;
using OpenSim.Framework.Terrain;

namespace OpenSim.Storage.LocalStorageDb4o
{
	/// <summary>
	/// 
	/// </summary>
	public class Db4LocalStorage : ILocalStorage
	{
		private IObjectContainer db;
		
		public Db4LocalStorage()
		{
			try 
			{
				db = Db4oFactory.OpenFile("localworld.yap");
				OpenSim.Framework.Console.MainConsole.Instance.WriteLine("Db4LocalStorage creation");
			}
			catch(Exception e) 
			{
				db.Close();
				OpenSim.Framework.Console.MainConsole.Instance.WriteLine("Db4LocalStorage :Constructor - Exception occured");
				OpenSim.Framework.Console.MainConsole.Instance.WriteLine(e.ToString());
			}
		}
		
		public void StorePrim(PrimData prim)
		{
			IObjectSet result = db.Query(new UUIDQuery(prim.FullID));
			if(result.Count>0)
			{
				//prim already in storage
				//so update it
				PrimData found = (PrimData) result.Next();
				found.PathBegin = prim.PathBegin;
				found.PathCurve= prim.PathCurve;
				found.PathEnd = prim.PathEnd;
				found.PathRadiusOffset = prim.PathRadiusOffset;
				found.PathRevolutions = prim.PathRevolutions;
				found.PathScaleX= prim.PathScaleX;
				found.PathScaleY = prim.PathScaleY;
				found.PathShearX = prim.PathShearX;
				found.PathShearY = prim.PathShearY;
				found.PathSkew = prim.PathSkew;
				found.PathTaperX = prim.PathTaperX;
				found.PathTaperY = prim.PathTaperY;
				found.PathTwist = prim.PathTwist;
				found.PathTwistBegin = prim.PathTwistBegin;
				found.PCode = prim.PCode;
				found.ProfileBegin = prim.ProfileBegin;
				found.ProfileCurve = prim.ProfileCurve;
				found.ProfileEnd = prim.ProfileEnd;
				found.ProfileHollow = prim.ProfileHollow;
				found.Position = prim.Position;
				found.Rotation = prim.Rotation;
                found.Texture = prim.Texture;
				db.Set(found);
				db.Commit();
			}
			else
			{
				//not in storage
				db.Set(prim);
				db.Commit();
			}
		}
		
		public void RemovePrim(LLUUID primID)
		{
			IObjectSet result = db.Query(new UUIDQuery(primID));
			if(result.Count>0)
			{
				PrimData found = (PrimData) result.Next();
				db.Delete(found);
			}
		}
		
		
		public void LoadPrimitives(ILocalStorageReceiver receiver)
		{
			IObjectSet result = db.Get(typeof(PrimData));
			OpenSim.Framework.Console.MainConsole.Instance.WriteLine("Db4LocalStorage.cs: LoadPrimitives() - number of prims in storages is "+result.Count);
			foreach (PrimData prim in result) {
				receiver.PrimFromStorage(prim);
			}
		}

        public float[,] LoadWorld()
        {
            OpenSim.Framework.Console.MainConsole.Instance.WriteLine("LoadWorld() - Loading world....");
            //World blank = new World();
            float[,] heightmap = null;
            OpenSim.Framework.Console.MainConsole.Instance.WriteLine("LoadWorld() - Looking for a heightmap in local DB");
            IObjectSet world_result = db.Get(typeof(MapStorage));
            if (world_result.Count > 0)
            {
                OpenSim.Framework.Console.MainConsole.Instance.WriteLine("LoadWorld() - Found a heightmap in local database, loading");
                MapStorage map = (MapStorage)world_result.Next();
                //blank.LandMap = map.Map;
                heightmap = map.Map;
            }
            else
            {
                OpenSim.Framework.Console.MainConsole.Instance.WriteLine("LoadWorld() - No heightmap found, generating new one");
                HeightmapGenHills hills = new HeightmapGenHills();
                // blank.LandMap = hills.GenerateHeightmap(200, 4.0f, 80.0f, false);
               // heightmap = hills.GenerateHeightmap(200, 4.0f, 80.0f, false);
                heightmap = new float[256, 256];
                OpenSim.Framework.Console.MainConsole.Instance.WriteLine("LoadWorld() - Saving heightmap to local database");
                MapStorage map = new MapStorage();
                map.Map = heightmap; //blank.LandMap;
                db.Set(map);
                db.Commit();
            }
            return heightmap;
        }

        public void SaveMap(float[,] heightmap)
        {
            IObjectSet world_result = db.Get(typeof(MapStorage));
            if (world_result.Count > 0)
            {
                OpenSim.Framework.Console.MainConsole.Instance.WriteLine("SaveWorld() - updating saved copy of heightmap in local database");
                MapStorage map = (MapStorage)world_result.Next();
                db.Delete(map);
            }
            MapStorage map1 = new MapStorage();
            map1.Map = heightmap; //OpenSim_Main.local_world.LandMap;
            db.Set(map1);
            db.Commit();
        }

		public void ShutDown()
		{
			db.Commit();
			db.Close();
		}
	}
}