/*
 * Copyright (c) 2006, Second Life Reverse Engineering Team
 * All rights reserved.
 *
 * - 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.
 * - Neither the name of the Second Life Reverse Engineering Team 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 COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR 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;

namespace libsecondlife
{
       public delegate void ParcelCompleteCallback(Region region);

       /// <summary>
       /// Represents a region (also known as a sim) in Second Life.
       /// </summary>
       public class Region
       {
               public LLUUID ID;
               public U64 Handle;
               public string Name;
               public byte[] ParcelOverlay;
               public int ParcelOverlaysReceived;

               public int[,] ParcelMarked; // 64x64 Array of parcels which have been successfully downloaded. (and their LocalID's, 0 = Null)
               public bool ParcelDownloading; // Flag to indicate whether we are downloading a sim's parcels.
               public bool ParcelDwell;           // Flag to indicate whether to get Dwell values automatically (NOT USED YET).
                                                                               // Call <parcel>.GetDwell() instead.

               public System.Collections.Hashtable Parcels;
               public System.Threading.Mutex ParcelsMutex;

               public float TerrainHeightRange00;
               public float TerrainHeightRange01;
               public float TerrainHeightRange10;
               public float TerrainHeightRange11;
               public float TerrainStartHeight00;
               public float TerrainStartHeight01;
               public float TerrainStartHeight10;
               public float TerrainStartHeight11;
               public float WaterHeight;

               public LLUUID SimOwner;

               public LLUUID TerrainBase0;
               public LLUUID TerrainBase1;
               public LLUUID TerrainBase2;
               public LLUUID TerrainBase3;
               public LLUUID TerrainDetail0;
               public LLUUID TerrainDetail1;
               public LLUUID TerrainDetail2;
               public LLUUID TerrainDetail3;

               public bool IsEstateManager;
	       public EstateTools Estate;

               private SecondLife Client;

               public event ParcelCompleteCallback OnParcelCompletion;

               public Region(SecondLife client)
               {
		       Estate = new EstateTools(client);
                       Client = client;
                       ID = new LLUUID();
                       Handle = new U64();
                       Name = "";
                       ParcelOverlay = new byte[4096];
                       ParcelOverlaysReceived = 0;

                       ParcelMarked = new int[64,64];
                       ParcelDownloading = false;
                       ParcelDwell = false;

                       Parcels = new System.Collections.Hashtable();
                       ParcelsMutex = new System.Threading.Mutex(false,"ParcelsMutex");

                       SimOwner = new LLUUID();

                       TerrainBase0 = new LLUUID();
                       TerrainBase1 = new LLUUID();
                       TerrainBase2 = new LLUUID();
                       TerrainBase3 = new LLUUID();
                       TerrainDetail0 = new LLUUID();
                       TerrainDetail1 = new LLUUID();
                       TerrainDetail2 = new LLUUID();
                       TerrainDetail3 = new LLUUID();

                       IsEstateManager = false;
               }

               public Region(SecondLife client, LLUUID id, U64 handle, string name, float[] heightList,
                       LLUUID simOwner, LLUUID[] terrainImages, bool isEstateManager)
               {
                       Client = client;
		       Estate = new EstateTools(client);
                       ID = id;
                       Handle = handle;
                       Name = name;
                       ParcelOverlay = new byte[4096];
                       ParcelMarked = new int[64,64];
                       ParcelDownloading = false;
                       ParcelDwell = false;

                       TerrainHeightRange00 = heightList[0];
                       TerrainHeightRange01 = heightList[1];
                       TerrainHeightRange10 = heightList[2];
                       TerrainHeightRange11 = heightList[3];
                       TerrainStartHeight00 = heightList[4];
                       TerrainStartHeight01 = heightList[5];
                       TerrainStartHeight10 = heightList[6];
                       TerrainStartHeight11 = heightList[7];
                       WaterHeight = heightList[8];

                       SimOwner = simOwner;

                       TerrainBase0 = terrainImages[0];
                       TerrainBase1 = terrainImages[1];
                       TerrainBase2 = terrainImages[2];
                       TerrainBase3 = terrainImages[3];
                       TerrainDetail0 = terrainImages[4];
                       TerrainDetail1 = terrainImages[5];
                       TerrainDetail2 = terrainImages[6];
                       TerrainDetail3 = terrainImages[7];

                       IsEstateManager = isEstateManager;
               }

               public void ParcelSubdivide(float west, float south, float east, float north)
               {
                       Client.Network.SendPacket(
                               Packets.Parcel.ParcelDivide(Client.Protocol,Client.Avatar.ID,
                               west,south,east,north));
               }

               public void ParcelJoin(float west, float south, float east, float north)
               {
                       Client.Network.SendPacket(
                               Packets.Parcel.ParcelJoin(Client.Protocol,Client.Avatar.ID,
                               west,south,east,north));
               }

               public void RezObject(PrimObject prim, LLVector3 position, LLVector3 avatarPosition)
               {
                       byte[] textureEntry = new byte[40];
                       Array.Copy(prim.Texture.Data, textureEntry, 16);
                       textureEntry[35] = 0xe0; // No clue

                       Packet objectAdd = libsecondlife.Packets.Object.ObjectAdd(Client.Protocol, Client.Network.AgentID,
                               LLUUID.GenerateUUID(), avatarPosition,
                               position, prim, textureEntry);
                       Client.Network.SendPacket(objectAdd);
               }

               public void FillParcels()
               {
                       // Begins filling parcels
                       ParcelDownloading = true;

                       // TODO: Replace Client.Network with Region.Simulator, or similar?
                       Client.Network.SendPacket(libsecondlife.Packets.Parcel.ParcelPropertiesRequest(Client.Protocol,Client.Avatar.ID, -10000,
                               0.0f,0.0f,4.0f,4.0f, false));
               }

               public void ResetParcelDownload()
               {
                       Parcels = new System.Collections.Hashtable();
                       ParcelMarked = new int[64,64];
               }

               public void FilledParcels()
               {
                       if(OnParcelCompletion != null)
                       {
                               OnParcelCompletion(this);
                       }
               }

               public override int GetHashCode()
               {
                       return ID.GetHashCode();
               }

               public override bool Equals(object o)
               {
                       if (!(o is Region))
                       {
                               return false;
                       }

                       Region region = (Region)o;

                       return (region.ID == ID);
               }

               public static bool operator==(Region lhs, Region rhs)
               {
                       try
                       {
                               return (lhs.ID == rhs.ID);
                       }
                       catch (NullReferenceException)
                       {
                               byte test;
                               bool lhsnull = false;
                               bool rhsnull = false;

                               try
                               {
                                       test = lhs.ID.Data[0];
                               }
                               catch (NullReferenceException)
                               {
                                       lhsnull = true;
                               }

                               try
                               {
                                       test = rhs.ID.Data[0];
                               }
                               catch (NullReferenceException)
                               {
                                       rhsnull = true;
                               }

                               return (lhsnull == rhsnull);
                       }
               }

               public static bool operator!=(Region lhs, Region rhs)
               {
                       return !(lhs == rhs);
               }
       }
}