/*
 * Copyright (c) 2007, 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;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
using System.Collections.Generic;
using System.Threading;
using libsecondlife;
using libsecondlife.Utilities.Assets;
using libsecondlife.Packets;

namespace libsecondlife.Utilities.Appearance
{
    /// <summary>
    /// 
    /// </summary>
    public class Wearable
    {
        /// <summary>
        /// 
        /// </summary>
        public enum WearableType : byte
        {
            /// <summary></summary>
            Shape = 0,
            /// <summary></summary>
            Skin,
            /// <summary></summary>
            Hair,
            /// <summary></summary>
            Eyes,
            /// <summary></summary>
            Shirt,
            /// <summary></summary>
            Pants,
            /// <summary></summary>
            Shoes,
            /// <summary></summary>
            Socks,
            /// <summary></summary>
            Jacket,
            /// <summary></summary>
            Gloves,
            /// <summary></summary>
            Undershirt,
            /// <summary></summary>
            Underpants,
            /// <summary></summary>
            Skirt,
            /// <summary></summary>
            Invalid = 255
        };

        /// <summary>
        /// 
        /// </summary>
        public enum ForSale
        {
            /// <summary>Not for sale</summary>
            Not = 0,
            /// <summary>The original is for sale</summary>
            Original = 1,
            /// <summary>Copies are for sale</summary>
            Copy = 2,
            /// <summary>The contents of the object are for sale</summary>
            Contents = 3
        }


        public string Name = String.Empty;
        public string Description = String.Empty;
        public WearableType Type = WearableType.Shape;
        public ForSale Sale = ForSale.Not;
        public int SalePrice = 0;
        public LLUUID Creator = LLUUID.Zero;
        public LLUUID Owner = LLUUID.Zero;
        public LLUUID LastOwner = LLUUID.Zero;
        public LLUUID Group = LLUUID.Zero;
        public bool GroupOwned = false;
        public Helpers.PermissionType BasePermissions;
        public Helpers.PermissionType EveryonePermissions;
        public Helpers.PermissionType OwnerPermissions;
        public Helpers.PermissionType NextOwnerPermissions;
        public Helpers.PermissionType GroupPermissions;
        public Dictionary<int, float> Params = new Dictionary<int, float>();
        public Dictionary<int, LLUUID> Textures = new Dictionary<int, LLUUID>();


        private SecondLife Client;
        private string[] ForSaleNames = new string[]
        {
            "not",
            "orig",
            "copy",
            "cntn"
        };


        /// <summary>
        /// Default constructor
        /// </summary>
        /// <param name="client">Reference to the SecondLife client</param>
        public Wearable(SecondLife client)
        {
            Client = client;
        }

        public static AssetType WearableTypeToAssetType(WearableType type)
        {
            switch (type)
            {
                case WearableType.Shape:
                case WearableType.Skin:
                case WearableType.Hair:
                case WearableType.Eyes:
                    return AssetType.Bodypart;
                case WearableType.Shirt:
                case WearableType.Pants:
                case WearableType.Shoes:
                case WearableType.Socks:
                case WearableType.Jacket:
                case WearableType.Gloves:
                case WearableType.Undershirt:
                case WearableType.Underpants:
                    return AssetType.Clothing;
                default:
                    return AssetType.Unknown;
            }
        }

        public bool ImportAsset(string data)
        {
            int version = -1;
            int n = -1;

            try
            {
                n = data.IndexOf('\n');
                version = Int32.Parse(data.Substring(19, n - 18));
                data = data.Remove(0, n);

                if (version != 22)
                {
                    Client.Log("Wearable asset has unrecognized version " + version, Helpers.LogLevel.Warning);
                    return false;
                }
                
                n = data.IndexOf('\n');
                Name = data.Substring(0, n);
                data = data.Remove(0, n);

                n = data.IndexOf('\n');
                Description = data.Substring(0, n);
                data = data.Remove(0, n);

                // Split in to an upper and lower half
                string[] parts = data.Split(new string[] { "parameters" }, StringSplitOptions.None);
                parts[1] = "parameters" + parts[1];

                // Parse the upper half
                string[] lines = parts[0].Split('\n');
                foreach (string thisline in lines)
                {
                    string line = thisline.Trim();
                    string[] fields = line.Split('\t');

                    if (fields.Length == 2)
                    {
                        if (fields[0] == "creator_mask")
                        {
                            // Deprecated, apply this as the base mask
                            BasePermissions = (Helpers.PermissionType)UInt32.Parse(fields[1], System.Globalization.NumberStyles.HexNumber);
                        }
                        else if (fields[0] == "base_mask")
                        {
                            BasePermissions = (Helpers.PermissionType)UInt32.Parse(fields[1], System.Globalization.NumberStyles.HexNumber);
                        }
                        else if (fields[0] == "owner_mask")
                        {
                            OwnerPermissions = (Helpers.PermissionType)UInt32.Parse(fields[1], System.Globalization.NumberStyles.HexNumber);
                        }
                        else if (fields[0] == "group_mask")
                        {
                            GroupPermissions = (Helpers.PermissionType)UInt32.Parse(fields[1], System.Globalization.NumberStyles.HexNumber);
                        }
                        else if (fields[0] == "everyone_mask")
                        {
                            EveryonePermissions = (Helpers.PermissionType)UInt32.Parse(fields[1], System.Globalization.NumberStyles.HexNumber);
                        }
                        else if (fields[0] == "next_owner_mask")
                        {
                            NextOwnerPermissions = (Helpers.PermissionType)UInt32.Parse(fields[1], System.Globalization.NumberStyles.HexNumber);
                        }
                        else if (fields[0] == "creator_id")
                        {
                            Creator = new LLUUID(fields[1]);
                        }
                        else if (fields[0] == "owner_id")
                        {
                            Owner = new LLUUID(fields[1]);
                        }
                        else if (fields[0] == "last_owner_id")
                        {
                            LastOwner = new LLUUID(fields[1]);
                        }
                        else if (fields[0] == "group_id")
                        {
                            Group = new LLUUID(fields[1]);
                        }
                        else if (fields[0] == "group_owned")
                        {
                            GroupOwned = (Int32.Parse(fields[1]) != 0);
                        }
                        else if (fields[0] == "sale_type")
                        {
                            for (int i = 0; i < ForSaleNames.Length; i++)
                            {
                                if (fields[1] == ForSaleNames[i])
                                {
                                    Sale = (ForSale)i;
                                    break;
                                }
                            }
                        }
                        else if (fields[0] == "sale_price")
                        {
                            SalePrice = Int32.Parse(fields[1]);
                        }
                        else if (fields[0] == "perm_mask")
                        {
                            Client.Log("Wearable asset has deprecated perm_mask field, ignoring", Helpers.LogLevel.Warning);
                        }
                    }
                    else if (line.StartsWith("type "))
                    {
                        Type = (WearableType)Int32.Parse(line.Substring(5));
                        break;
                    }
                }

                // Break up the lower half in to parameters and textures
                string[] lowerparts = parts[1].Split(new string[] { "textures" }, StringSplitOptions.None);
                lowerparts[1] = "textures" + lowerparts[1];

                // Parse the parameters
                lines = lowerparts[0].Split('\n');
                foreach (string line in lines)
                {
                    string[] fields = line.Split(' ');

                    // Use exception handling to deal with all the lines we aren't interested in
                    try
                    {
                        int id = Int32.Parse(fields[0]);
                        float weight = Single.Parse(fields[1]);

                        Params[id] = weight;
                    }
                    catch (Exception)
                    {
                    }
                }

                // Parse the textures
                lines = lowerparts[1].Split('\n');
                foreach (string line in lines)
                {
                    string[] fields = line.Split(' ');

                    // Use exception handling to deal with all the lines we aren't interested in
                    try
                    {
                        int id = Int32.Parse(fields[0]);
                        LLUUID texture = LLUUID.Parse(fields[1]);

                        Textures[id] = texture;
                    }
                    catch (Exception)
                    {
                    }
                }

                return true;
            }
            catch (Exception e)
            {
                Client.Log("Failed to parse wearable asset: " + e.ToString(), Helpers.LogLevel.Warning);
            }

            return false;
        }

        public string ExportAsset()
        {
            StringBuilder data = new StringBuilder("LLWearable version 22\n");
            data.Append(Name); data.Append("\n\n");
            data.Append("\tpermissions 0\n\t{\n");
            data.Append("\t\tbase_mask\t"); data.Append(Helpers.UIntToHexString((uint)BasePermissions)); data.Append("\n");
            data.Append("\t\towner_mask\t"); data.Append(Helpers.UIntToHexString((uint)OwnerPermissions)); data.Append("\n");
            data.Append("\t\tgroup_mask\t"); data.Append(Helpers.UIntToHexString((uint)GroupPermissions)); data.Append("\n");
            data.Append("\t\teveryone_mask\t"); data.Append(Helpers.UIntToHexString((uint)EveryonePermissions)); data.Append("\n");
            data.Append("\t\tnext_owner_mask\t"); data.Append(Helpers.UIntToHexString((uint)NextOwnerPermissions)); data.Append("\n");
            data.Append("\t\tcreator_id\t"); data.Append(Creator.ToStringHyphenated()); data.Append("\n");
            data.Append("\t\towner_id\t"); data.Append(Owner.ToStringHyphenated()); data.Append("\n");
            data.Append("\t\tlast_owner_id\t"); data.Append(LastOwner.ToStringHyphenated()); data.Append("\n");
            data.Append("\t\tgroup_id\t"); data.Append(Group.ToStringHyphenated()); data.Append("\n");
            if (GroupOwned) data.Append("\t\tgroup_owned\t1\n");
            data.Append("\t}\n");
            data.Append("\tsale_info\t0\n");
            data.Append("\t{\n");
            data.Append("\t\tsale_type\t"); data.Append(ForSaleNames[(int)Sale]); data.Append("\n");
            data.Append("\t\tsale_price\t"); data.Append(SalePrice); data.Append("\n");
            data.Append("\t}\n");
            data.Append("type "); data.Append((int)Type); data.Append("\n");

            data.Append("parameters "); data.Append(Params.Count); data.Append("\n");
            foreach (KeyValuePair<int, float> param in Params)
            {
                data.Append(param.Key); data.Append(" "); data.Append(Helpers.FloatToTerseString(param.Value)); data.Append("\n");
            }

            data.Append("textures "); data.Append(Textures.Count); data.Append("\n");
            foreach (KeyValuePair<int, LLUUID> texture in Textures)
            {
                data.Append(texture.Key); data.Append(" "); data.Append(texture.Value.ToStringHyphenated()); data.Append("\n");
            }

            return data.ToString();
        }
    }

    /// <summary>
    /// 
    /// </summary>
    public struct WearableData
    {
        public Wearable Wearable;
        public LLUUID AssetID;
        public LLUUID ItemID;
    }

    /// <summary>
    /// 
    /// </summary>
    public class AppearanceManager
    {
        /// <summary>
        /// 
        /// </summary>
        public enum TextureIndex
        {
            Unknown = -1,
            HeadBodypaint = 0,
            UpperShirt,
            LowerPants,
            EyesIris,
            Hair,
            UpperBodypaint,
            LowerBodypaint,
            LowerShoes,
            HeadBaked,
            UpperBaked,
            LowerBaked,
            EyesBaked,
            LowerSocks,
            UpperJacket,
            LowerJacket,
            UpperUndershirt,
            LowerUnderpants,
            Skirt,
            SkirtBaked
        }

        /// <summary>
        /// 
        /// </summary>
        public enum BakeType
        {
            Head = 0,
            UpperBody = 1,
            LowerBody = 2,
            Eyes = 3,
            Skirt = 4
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="wearables">A mapping of WearableTypes to KeyValuePairs
        /// with Asset ID of the wearable as key and Item ID as value</param>
        public delegate void AgentWearablesCallback(Dictionary<Wearable.WearableType, KeyValuePair<LLUUID, LLUUID>> wearables);


        /// <summary></summary>
        public event AgentWearablesCallback OnAgentWearables;

        /// <summary>Total number of wearables for each avatar</summary>
        public const int WEARABLE_COUNT = 13;
        /// <summary></summary>
        public const int BAKED_TEXTURE_COUNT = 5;
        /// <summary></summary>
        public const int WEARABLES_PER_LAYER = 7;
        /// <summary></summary>
        public const int AVATAR_TEXTURE_COUNT = 20;
        /// <summary>Map of what wearables are included in each bake</summary>
        public static readonly Wearable.WearableType[][] WEARABLE_BAKE_MAP = new Wearable.WearableType[][]
        {
            new Wearable.WearableType[] { Wearable.WearableType.Shape, Wearable.WearableType.Skin,    Wearable.WearableType.Hair,    Wearable.WearableType.Invalid, Wearable.WearableType.Invalid, Wearable.WearableType.Invalid,    Wearable.WearableType.Invalid    },
            new Wearable.WearableType[] { Wearable.WearableType.Shape, Wearable.WearableType.Skin,    Wearable.WearableType.Shirt,   Wearable.WearableType.Jacket,  Wearable.WearableType.Gloves,  Wearable.WearableType.Undershirt, Wearable.WearableType.Invalid    },
            new Wearable.WearableType[] { Wearable.WearableType.Shape, Wearable.WearableType.Skin,    Wearable.WearableType.Pants,   Wearable.WearableType.Shoes,   Wearable.WearableType.Socks,   Wearable.WearableType.Jacket,     Wearable.WearableType.Underpants },
            new Wearable.WearableType[] { Wearable.WearableType.Eyes,  Wearable.WearableType.Invalid, Wearable.WearableType.Invalid, Wearable.WearableType.Invalid, Wearable.WearableType.Invalid, Wearable.WearableType.Invalid,    Wearable.WearableType.Invalid    },
            new Wearable.WearableType[] { Wearable.WearableType.Skin,  Wearable.WearableType.Invalid, Wearable.WearableType.Invalid, Wearable.WearableType.Invalid, Wearable.WearableType.Invalid, Wearable.WearableType.Invalid,    Wearable.WearableType.Invalid    }
        };
        /// <summary>Secret values to finalize the cache check hashes for each
        /// bake</summary>
        public static readonly LLUUID[] BAKED_TEXTURE_HASH = new LLUUID[]
        {
            new LLUUID("18ded8d6-bcfc-e415-8539-944c0f5ea7a6"),
	        new LLUUID("338c29e3-3024-4dbb-998d-7c04cf4fa88f"),
	        new LLUUID("91b4a2c7-1b1a-ba16-9a16-1f8f8dcc1c3f"),
	        new LLUUID("b2cf28af-b840-1071-3c6a-78085d8128b5"),
	        new LLUUID("ea800387-ea1a-14e0-56cb-24f2022f969a")
        };
        /// <summary>Default avatar texture, used to detect when a custom
        /// texture is not set for a face</summary>
        public static readonly LLUUID DEFAULT_AVATAR_TEXTURE = new LLUUID("c228d1cf-4b5d-4ba8-84f4-899a0796aa97");


        private SecondLife Client;
        private AssetManager Assets;
        private Dictionary<Wearable.WearableType, WearableData> Wearables = new Dictionary<Wearable.WearableType, WearableData>();
        // As wearable assets are downloaded and decoded, the textures are added to this list
        private Dictionary<TextureIndex, LLUUID> AgentTextures = new Dictionary<TextureIndex, LLUUID>();
        // Wearable assets are downloaded one at a time, a new request is pulled off the queue
        // and started when the previous one completes
        private Queue<KeyValuePair<LLUUID, AssetType>> DownloadQueue = new Queue<KeyValuePair<LLUUID, AssetType>>();
        // A list of all the images we are currently downloading, prior to baking
        private Dictionary<LLUUID, TextureIndex> ImageDownloads = new Dictionary<LLUUID, TextureIndex>();
        // A list of all the bakes we need to complete
        private Dictionary<BakeType, BakeLayer> PendingBakes = new Dictionary<BakeType, BakeLayer>(BAKED_TEXTURE_COUNT);
        // A list of all the uploads that are in progress
        private Dictionary<LLUUID, TextureIndex> PendingUploads = new Dictionary<LLUUID, TextureIndex>(BAKED_TEXTURE_COUNT);
        // Whether the handler for our current wearable list should automatically start downloading the assets
        private bool DownloadWearables = false;
        private int CacheCheckSerialNum = 0;
        private uint SetAppearanceSerialNum = 0;
        private ManualResetEvent WearablesDownloadedEvent = new ManualResetEvent(false);
        private ManualResetEvent CachedResponseEvent = new ManualResetEvent(false);
        // FIXME: Create a class-level appearance thread so multiple threads can't be launched

        /// <summary>
        /// Default constructor
        /// </summary>
        /// <param name="client"></param>
        /// <param name="assets"></param>
        public AppearanceManager(SecondLife client, libsecondlife.Utilities.Assets.AssetManager assets)
        {
            Client = client;
            Assets = assets;

            Client.Network.RegisterCallback(PacketType.AgentWearablesUpdate, new NetworkManager.PacketCallback(AgentWearablesHandler));
            Client.Network.RegisterCallback(PacketType.AgentCachedTextureResponse, new NetworkManager.PacketCallback(AgentCachedTextureResponseHandler));
        }

        /// <summary>
        /// If the appearance thread is running it is terminated here
        /// </summary>
        ~AppearanceManager()
        {
            WearablesDownloadedEvent.Set();
            CachedResponseEvent.Set();
        }

        /// <summary>
        /// Returns the assetID for a given WearableType 
        /// </summary>
        /// <param name="type"></param>
        /// <returns></returns>
        public LLUUID GetWearableAsset(Wearable.WearableType type)
        {
            if (Wearables.ContainsKey(type))
                return Wearables[type].AssetID;
            else
                return null;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public void SetPreviousAppearance()
        {
            // Clear out any previous data
            DownloadWearables = false;
            lock (Wearables) Wearables.Clear();
            lock (AgentTextures) AgentTextures.Clear();
            lock (DownloadQueue) DownloadQueue.Clear();

            Thread appearanceThread = new Thread(new ThreadStart(StartSetPreviousAppearance));
            appearanceThread.Start();
        }

        /// <summary>
        /// Build hashes out of the texture assetIDs for each baking layer to
        /// ask the simulator whether it has cached copies of each baked layer
        /// </summary>
        public void RequestCachedBakes()
        {
            List<KeyValuePair<int, LLUUID>> hashes = new List<KeyValuePair<int,LLUUID>>();

            AgentCachedTexturePacket cache = new AgentCachedTexturePacket();
            cache.AgentData.AgentID = Client.Network.AgentID;
            cache.AgentData.SessionID = Client.Network.SessionID;
            cache.AgentData.SerialNum = CacheCheckSerialNum;

            // Build hashes for each of the bake layers from the individual components
            for (int bakedIndex = 0; bakedIndex < BAKED_TEXTURE_COUNT; bakedIndex++)
            {
                // Don't do a cache request for a skirt bake if we're not wearing a skirt
                if (bakedIndex == (int)BakeType.Skirt && 
                    (!Wearables.ContainsKey(Wearable.WearableType.Skirt) || Wearables[Wearable.WearableType.Skirt].AssetID == LLUUID.Zero))
                    continue;

                LLUUID hash = new LLUUID();

                for (int wearableIndex = 0; wearableIndex < WEARABLES_PER_LAYER; wearableIndex++)
                {
                    Wearable.WearableType type = WEARABLE_BAKE_MAP[bakedIndex][wearableIndex];
                    LLUUID assetID = GetWearableAsset(type);

                    // Build a hash of all the texture asset IDs in this baking layer
                    if (assetID != null) hash ^= assetID;
                }

                if (hash != LLUUID.Zero)
                {
                    // Hash with our secret value for this baked layer
                    hash ^= BAKED_TEXTURE_HASH[bakedIndex];

                    // Add this to the list of hashes to send out
                    hashes.Add(new KeyValuePair<int, LLUUID>(bakedIndex, hash));
                }
            }

            // Only send the packet out if there's something to check
            if (hashes.Count > 0)
            {
                cache.WearableData = new AgentCachedTexturePacket.WearableDataBlock[hashes.Count];

                for (int i = 0; i < hashes.Count; i++)
                {
                    cache.WearableData[i] = new AgentCachedTexturePacket.WearableDataBlock();
                    cache.WearableData[i].TextureIndex = (byte)hashes[i].Key;
                    cache.WearableData[i].ID = hashes[i].Value;

                    Client.DebugLog("Checking cache for index " + cache.WearableData[i].TextureIndex +
                        ", ID: " + cache.WearableData[i].ID);
                }

                // Increment our serial number for this packet
                CacheCheckSerialNum++;

                // Send it out
                Client.Network.SendPacket(cache);
            }
        }

        /// <summary>
        /// Ask the server what textures our avatar is currently wearing
        /// </summary>
        public void RequestAgentWearables()
        {
            AgentWearablesRequestPacket request = new AgentWearablesRequestPacket();
            request.AgentData.AgentID = Client.Network.AgentID;
            request.AgentData.SessionID = Client.Network.SessionID;

            Client.Network.SendPacket(request);
        }

        private void StartSetPreviousAppearance()
        {
            WearablesDownloadedEvent.Reset();
            CachedResponseEvent.Reset();
            DownloadWearables = true;

            // Register an asset download callback to get wearable data
            AssetManager.AssetReceivedCallback assetCallback = new AssetManager.AssetReceivedCallback(Assets_OnAssetReceived);
            AssetManager.ImageReceivedCallback imageCallback = new AssetManager.ImageReceivedCallback(Assets_OnImageReceived);
            AssetManager.AssetUploadedCallback uploadCallback = new AssetManager.AssetUploadedCallback(Assets_OnAssetUploaded);
            Assets.OnAssetReceived += assetCallback;
            Assets.OnImageReceived += imageCallback;
            Assets.OnAssetUploaded += uploadCallback;

            // Ask the server what we are currently wearing
            RequestAgentWearables();

            WearablesDownloadedEvent.WaitOne();

            // Unregister the asset download callback
            Assets.OnAssetReceived -= assetCallback;

            Client.DebugLog("WearablesDownloadEvent completed");

            // Now that we know what the avatar is wearing, we can check if anything needs to be rebaked
            RequestCachedBakes();

            // Send a list of what we are currently wearing
            SendAgentWearables();

            CachedResponseEvent.WaitOne();

            // Unregister the image download and asset upload callbacks
            Assets.OnImageReceived -= imageCallback;
            Assets.OnAssetUploaded -= uploadCallback;

            Client.DebugLog("CachedResponseEvent completed");

            // Send all of the visual params and textures for our agent
            SendAgentSetAppearance();
        }

        private void SendAgentSetAppearance()
        {
            AgentSetAppearancePacket set = new AgentSetAppearancePacket();
            set.AgentData.AgentID = Client.Network.AgentID;
            set.AgentData.SessionID = Client.Network.SessionID;
            set.AgentData.SerialNum = SetAppearanceSerialNum++;
            set.VisualParam = new AgentSetAppearancePacket.VisualParamBlock[VisualParams.Params.Length];

            lock (Wearables)
            {
                // Only for debugging output
                int count = 0;

                // Build the visual param array
                for (int i = 0; i < VisualParams.Params.Length; i++)
                {
                    bool found = false;
                    set.VisualParam[i] = new AgentSetAppearancePacket.VisualParamBlock();

                    // Try and find this value in our collection of downloaded wearables
                    foreach (WearableData data in Wearables.Values)
                    {
                        if (data.Wearable.Params.ContainsKey(i))
                        {
                            set.VisualParam[i].ParamValue = Helpers.FloatToByte(data.Wearable.Params[i], 
                                VisualParams.Params[i].MinValue, VisualParams.Params[i].MaxValue);
                            found = true;
                            count++;
                            break;
                        }
                    }

                    // Use a default value if we don't have one set for it
                    if (!found)
                    {
                        set.VisualParam[i].ParamValue = Helpers.FloatToByte(VisualParams.Params[i].DefaultValue,
                            VisualParams.Params[i].MinValue, VisualParams.Params[i].MaxValue);
                    }
                }

                Client.DebugLog("Sending " + count + " VisualParams");

                // Build the texture entry for our agent
                LLObject.TextureEntry te = new LLObject.TextureEntry(DEFAULT_AVATAR_TEXTURE);

                // Put our AgentTextures dictionary in to TextureEntry
                lock (AgentTextures)
                {
                    foreach (KeyValuePair<TextureIndex, LLUUID> texture in AgentTextures)
                    {
                        LLObject.TextureEntryFace face = te.CreateFace((uint)texture.Key);
                        face.TextureID = texture.Value;
                    }
                }

                foreach (WearableData data in Wearables.Values)
                {
                    foreach (KeyValuePair<int, LLUUID> texture in data.Wearable.Textures)
                    {
                        LLObject.TextureEntryFace face = te.CreateFace((uint)texture.Key);
                        face.TextureID = texture.Value;

                        Client.DebugLog("Setting texture " + ((TextureIndex)texture.Key).ToString() + " to " +
                            texture.Value.ToStringHyphenated());
                    }
                }

                // Set the packet TextureEntry
                set.ObjectData.TextureEntry = te.ToBytes();
            }

            // This is a bit hackish, but a whole lot better than implementing the actual algorithm
            float height = Helpers.ByteToFloat(set.VisualParam[25].ParamValue, VisualParams.Params[25].MinValue,
                VisualParams.Params[25].MaxValue);
            set.AgentData.Size = new LLVector3(0.45f, 0.6f, 1.50856f + ((height / 255.0f) * (2.025506f - 1.50856f)));

            // TODO: Account for not having all the textures baked yet
            set.WearableData = new AgentSetAppearancePacket.WearableDataBlock[BAKED_TEXTURE_COUNT];

            // Build hashes for each of the bake layers from the individual components
            for (int bakedIndex = 0; bakedIndex < BAKED_TEXTURE_COUNT; bakedIndex++)
            {
                LLUUID hash = new LLUUID();

                for (int wearableIndex = 0; wearableIndex < WEARABLES_PER_LAYER; wearableIndex++)
                {
                    Wearable.WearableType type = WEARABLE_BAKE_MAP[bakedIndex][wearableIndex];
                    LLUUID assetID = GetWearableAsset(type);

                    // Build a hash of all the texture asset IDs in this baking layer
                    if (assetID != null) hash ^= assetID;
                }

                if (hash != LLUUID.Zero)
                {
                    // Hash with our secret value for this baked layer
                    hash ^= BAKED_TEXTURE_HASH[bakedIndex];
                }

                // Tell the server what cached texture assetID to use for each bake layer
                set.WearableData[bakedIndex] = new AgentSetAppearancePacket.WearableDataBlock();
                set.WearableData[bakedIndex].TextureIndex = (byte)bakedIndex;
                set.WearableData[bakedIndex].CacheID = hash;
            }

            // Finally, send the packet
            Client.Network.SendPacket(set);
        }

        private void SendAgentWearables()
        {
            Client.DebugLog("Wearables contains " + Wearables.Count + " entries");

            AgentIsNowWearingPacket wearing = new AgentIsNowWearingPacket();
            wearing.AgentData.AgentID = Client.Network.AgentID;
            wearing.AgentData.SessionID = Client.Network.SessionID;
            wearing.WearableData = new AgentIsNowWearingPacket.WearableDataBlock[WEARABLE_COUNT];

            for (int i = 0; i < WEARABLE_COUNT; i++)
            {
                Wearable.WearableType type = (Wearable.WearableType)i;
                wearing.WearableData[i] = new AgentIsNowWearingPacket.WearableDataBlock();
                wearing.WearableData[i].WearableType = (byte)i;

                if (Wearables.ContainsKey(type))
                    wearing.WearableData[i].ItemID = Wearables[type].ItemID;
                else
                    wearing.WearableData[i].ItemID = LLUUID.Zero;
            }

            Client.Network.SendPacket(wearing);
        }

        private TextureIndex BakedIndexToAgentTextureIndex(BakeType index)
        {
            switch (index)
            {
                case BakeType.Head:
                    return TextureIndex.HeadBaked;
                case BakeType.UpperBody:
                    return TextureIndex.UpperBaked;
                case BakeType.LowerBody:
                    return TextureIndex.LowerBaked;
                case BakeType.Eyes:
                    return TextureIndex.EyesBaked;
                case BakeType.Skirt:
                    return TextureIndex.SkirtBaked;
                default:
                    return TextureIndex.Unknown;
            }
        }

        private void AgentWearablesHandler(Packet packet, Simulator simulator)
        {
            // Lock to prevent a race condition with multiple AgentWearables packets
            lock (WearablesDownloadedEvent)
            {
                AgentWearablesUpdatePacket update = (AgentWearablesUpdatePacket)packet;

                // Reset the Wearables collection
                lock (Wearables) Wearables.Clear();

                for (int i = 0; i < update.WearableData.Length; i++)
                {
                    if (update.WearableData[i].AssetID != LLUUID.Zero)
                    {
                        Wearable.WearableType type = (Wearable.WearableType)update.WearableData[i].WearableType;
                        WearableData data = new WearableData();
                        data.AssetID = update.WearableData[i].AssetID;
                        data.ItemID = update.WearableData[i].ItemID;
                        data.Wearable = new Wearable(Client);
                        data.Wearable.Type = type;

                        // Add this wearable to our collection
                        lock (Wearables) Wearables[type] = data;

                        // Convert WearableType to AssetType
                        AssetType assetType = Wearable.WearableTypeToAssetType(type);

                        Client.DebugLog("Downloading wearable " + type.ToString() + ": " +
                            data.AssetID.ToStringHyphenated());

                        // Add this wearable asset to the download queue
                        if (DownloadWearables)
                        {
                            KeyValuePair<LLUUID, AssetType> download = 
                                new KeyValuePair<LLUUID,AssetType>(data.AssetID, assetType);
                            DownloadQueue.Enqueue(download);
                        }
                    }
                }

                if (DownloadQueue.Count > 0)
                {
                    KeyValuePair<LLUUID, AssetType> download = DownloadQueue.Dequeue();
                    Assets.RequestAsset(download.Key, download.Value, true);
                }

                // Don't download wearables twice in a row
                DownloadWearables = false;
            }

            if (OnAgentWearables != null)
            {
                // Refactor our internal Wearables dictionary in to something for the callback
                Dictionary<Wearable.WearableType, KeyValuePair<LLUUID, LLUUID>> wearables =
                    new Dictionary<Wearable.WearableType, KeyValuePair<LLUUID, LLUUID>>();

                lock (Wearables)
                {
                    foreach (KeyValuePair<Wearable.WearableType, WearableData> data in Wearables)
                        wearables.Add(data.Key, new KeyValuePair<LLUUID,LLUUID>(data.Value.AssetID, data.Value.ItemID));
                }

                try { OnAgentWearables(wearables); }
                catch (Exception e) { Client.Log(e.ToString(), Helpers.LogLevel.Error); }
            }
        }

        private void AgentCachedTextureResponseHandler(Packet packet, Simulator simulator)
        {
            AgentCachedTextureResponsePacket response = (AgentCachedTextureResponsePacket)packet;
            Dictionary<int, float> paramValues = new Dictionary<int, float>(VisualParams.Params.Length);

            // Build a dictionary of appearance parameter indices and values from the wearables
            for (int i = 0; i < VisualParams.Params.Length; i++)
            {
                bool found = false;

                // Try and find this value in our collection of downloaded wearables
                foreach (WearableData data in Wearables.Values)
                {
                    if (data.Wearable.Params.ContainsKey(i))
                    {
                        paramValues.Add(i,data.Wearable.Params[i]);
                        found = true;
                        break;
                    }
                }

                // Use a default value if we don't have one set for it
                if (!found) paramValues.Add(i, VisualParams.Params[i].DefaultValue);
            }

            lock (AgentTextures)
            {
                foreach (AgentCachedTextureResponsePacket.WearableDataBlock block in response.WearableData)
                {
                    // For each missing element we need to bake our own texture
                    Client.DebugLog("Cache response, index: " + block.TextureIndex + ", ID: " +
                        block.TextureID.ToStringHyphenated());

                    // FIXME: Use this. Right now we treat baked images on other sims as if they were missing
                    string host = Helpers.FieldToUTF8String(block.HostName);

                    if (host.Length > 0)
                        Client.DebugLog("Cached bake exists on foreign host " + host);

                    // Convert the baked index to an AgentTexture index
                    if (block.TextureID != LLUUID.Zero && host.Length == 0)
                    {
                        TextureIndex index = BakedIndexToAgentTextureIndex((BakeType)block.TextureIndex);
                        AgentTextures[index] = block.TextureID;
                    }
                    else
                    {
                        // Download all of the images in this layer. This is kind of hacky to be
                        // hardcoded in but it is the most straightforward way to do what we need
                        switch ((BakeType)block.TextureIndex)
                        {
                            case BakeType.Head:
                                lock (ImageDownloads)
                                {
                                    PendingBakes.Add(BakeType.Head, new BakeLayer(Client, 2, paramValues));
                                    ImageDownloads.Add(AgentTextures[TextureIndex.HeadBodypaint], TextureIndex.HeadBodypaint);
                                    ImageDownloads.Add(AgentTextures[TextureIndex.Hair], TextureIndex.Hair);
                                }
                                break;
                            case BakeType.UpperBody:
                                lock (ImageDownloads)
                                {
                                    PendingBakes.Add(BakeType.UpperBody, new BakeLayer(Client, 4, paramValues));
                                    ImageDownloads.Add(AgentTextures[TextureIndex.UpperBodypaint], TextureIndex.UpperBodypaint);
                                    ImageDownloads.Add(AgentTextures[TextureIndex.UpperUndershirt], TextureIndex.UpperUndershirt);
                                    ImageDownloads.Add(AgentTextures[TextureIndex.UpperShirt], TextureIndex.UpperShirt);
                                    ImageDownloads.Add(AgentTextures[TextureIndex.UpperJacket], TextureIndex.UpperJacket);
                                    // TODO: Where are the gloves?
                                }
                                break;
                            case BakeType.LowerBody:
                                lock (ImageDownloads)
                                {
                                    PendingBakes.Add(BakeType.LowerBody, new BakeLayer(Client, 6, paramValues));
                                    ImageDownloads.Add(AgentTextures[TextureIndex.LowerBodypaint], TextureIndex.LowerBodypaint);
                                    ImageDownloads.Add(AgentTextures[TextureIndex.LowerUnderpants], TextureIndex.LowerUnderpants);
                                    ImageDownloads.Add(AgentTextures[TextureIndex.LowerSocks], TextureIndex.LowerSocks);
                                    ImageDownloads.Add(AgentTextures[TextureIndex.LowerShoes], TextureIndex.LowerShoes);
                                    ImageDownloads.Add(AgentTextures[TextureIndex.LowerPants], TextureIndex.LowerPants);
                                    ImageDownloads.Add(AgentTextures[TextureIndex.LowerJacket], TextureIndex.LowerJacket);
                                }
                                break;
                            case BakeType.Eyes:
                                lock (ImageDownloads)
                                {
                                    PendingBakes.Add(BakeType.Eyes, new BakeLayer(Client, 1, paramValues));
                                    ImageDownloads.Add(AgentTextures[TextureIndex.EyesIris], TextureIndex.EyesIris);
                                }
                                break;
                            case BakeType.Skirt:
                                if (Wearables.ContainsKey(Wearable.WearableType.Skirt))
                                {
                                    lock (ImageDownloads)
                                    {
                                        PendingBakes.Add(BakeType.Skirt, new BakeLayer(Client, 1, paramValues));
                                        ImageDownloads.Add(AgentTextures[TextureIndex.Skirt], TextureIndex.Skirt);
                                    }
                                }
                                break;
                            default:
                                Client.Log("Unknown BakeType " + block.TextureIndex, Helpers.LogLevel.Warning);
                                break;
                        }
                    }
                }
            }

            if (ImageDownloads.Count == 0)
            {
                // No pending downloads for baking, we're done
                CachedResponseEvent.Set();
            }
            else
            {
                lock (ImageDownloads)
                {
                    foreach (LLUUID image in ImageDownloads.Keys)
                    {
                        // Download all the images we need for baking
                        Assets.RequestImage(image, ImageType.Normal, 1013000.0f, 0);
                    }
                }
            }
        }

        private void Assets_OnAssetReceived(AssetDownload asset)
        {
            lock (Wearables)
            {
                // Check if this is a wearable we were waiting on
                foreach (WearableData data in Wearables.Values)
                {
                    if (data.AssetID == asset.AssetID)
                    {
                        // Make sure the download succeeded
                        if (asset.Success)
                        {
                            // Convert the downloaded asset to a string
                            string wearableData = Helpers.FieldToUTF8String(asset.AssetData);

                            // Attempt to parse the wearable data
                            if (data.Wearable.ImportAsset(wearableData))
                            {
                                lock (AgentTextures)
                                {
                                    foreach (KeyValuePair<int, LLUUID> texture in data.Wearable.Textures)
                                        AgentTextures[(TextureIndex)texture.Key] = texture.Value;
                                }

                                Client.DebugLog("Imported wearable asset " + data.Wearable.Type.ToString());
                            }
                            else
                            {
                                Client.Log("Failed to decode wearable asset " + asset.AssetID.ToStringHyphenated(),
                                    Helpers.LogLevel.Warning);
                            }
                        }
                        else
                        {
                            Client.Log("Wearable " + data.Wearable.Type.ToString() + "(" +
                                asset.AssetID.ToStringHyphenated() + ") failed to download, " + asset.Status.ToString(),
                                Helpers.LogLevel.Warning);
                        }

                        break;
                    }
                }
            }

            if (DownloadQueue.Count > 0)
            {
                // Dowload the next wearable in line
                KeyValuePair<LLUUID, AssetType> download = DownloadQueue.Dequeue();
                Assets.RequestAsset(download.Key, download.Value, true);
            }
            else
            {
                // Everything is downloaded
                WearablesDownloadedEvent.Set();
            }
        }

        private void Assets_OnImageReceived(ImageDownload image)
        {
            lock (ImageDownloads)
            {
                if (ImageDownloads.ContainsKey(image.ID))
                {
                    TextureIndex index = ImageDownloads[image.ID];
                    BakeType type = BakeType.Head;
                    BakeLayer.BakeOrder order = BakeLayer.BakeOrder.HeadBodypaint;

                    if (image.Success)
                    {
                        // Add this image to a baking layer
                        switch (index)
                        {
                            case TextureIndex.HeadBodypaint:
                                type = BakeType.Head;
                                order = BakeLayer.BakeOrder.HeadBodypaint;
                                break;
                            case TextureIndex.Hair:
                                type = BakeType.Head;
                                order = BakeLayer.BakeOrder.Hair;
                                break;
                            case TextureIndex.UpperBodypaint:
                                type = BakeType.UpperBody;
                                order = BakeLayer.BakeOrder.UpperBodypaint;
                                break;
                            case TextureIndex.UpperUndershirt:
                                type = BakeType.UpperBody;
                                order = BakeLayer.BakeOrder.UpperUndershirt;
                                break;
                            case TextureIndex.UpperShirt:
                                type = BakeType.UpperBody;
                                order = BakeLayer.BakeOrder.UpperShirt;
                                break;
                            case TextureIndex.UpperJacket:
                                type = BakeType.UpperBody;
                                order = BakeLayer.BakeOrder.UpperJacket;
                                break;
                            case TextureIndex.LowerBodypaint:
                                type = BakeType.LowerBody;
                                order = BakeLayer.BakeOrder.LowerBodypaint;
                                break;
                            case TextureIndex.LowerUnderpants:
                                type = BakeType.LowerBody;
                                order = BakeLayer.BakeOrder.LowerUnderpants;
                                break;
                            case TextureIndex.LowerSocks:
                                type = BakeType.LowerBody;
                                order = BakeLayer.BakeOrder.LowerSocks;
                                break;
                            case TextureIndex.LowerShoes:
                                type = BakeType.LowerBody;
                                order = BakeLayer.BakeOrder.LowerShoes;
                                break;
                            case TextureIndex.LowerPants:
                                type = BakeType.LowerBody;
                                order = BakeLayer.BakeOrder.LowerPants;
                                break;
                            case TextureIndex.LowerJacket:
                                type = BakeType.LowerBody;
                                order = BakeLayer.BakeOrder.LowerJacket;
                                break;
                            case TextureIndex.EyesIris:
                                type = BakeType.Eyes;
                                order = BakeLayer.BakeOrder.EyesIris;
                                break;
                            case TextureIndex.Skirt:
                                type = BakeType.Skirt;
                                order = BakeLayer.BakeOrder.Skirt;
                                break;
                            default:
                                Client.Log("Image downloaded for unknown TextureIndex " + index.ToString(),
                                    Helpers.LogLevel.Warning);
                                break;
                        }

                        if (PendingBakes.ContainsKey(type) && PendingBakes[type].AddImage(order, image.AssetData))
                        {
                            // Create a transactionID and assetID for this upload
                            LLUUID transactionID = LLUUID.Random();
                            LLUUID assetID = transactionID.Combine(Client.Network.SecureSessionID);

                            // Upload the completed bake data
                            Assets.RequestUpload(transactionID, AssetType.Texture, PendingBakes[type].FinalData, 
                                true, true, false);

                            // Add it to a pending uploads list
                            lock (PendingUploads) PendingUploads.Add(assetID, index);

                            // Remove this bake from the pending list
                            PendingBakes.Remove(type);
                        }
                    }
                    else
                    {
                        Client.Log("Texture " + image.ID.ToStringHyphenated() + " failed to download, " +
                            "bake will be incomplete", Helpers.LogLevel.Warning);
                    }

                    ImageDownloads.Remove(image.ID);

                    if (ImageDownloads.Count == 0 && PendingUploads.Count == 0)
                    {
                        // This is a failsafe catch, as the upload completed callback should normally 
                        // be triggering the event
                        CachedResponseEvent.Set();
                    }
                }
            }
        }

        private void Assets_OnAssetUploaded(AssetUpload upload)
        {
            lock (PendingUploads)
            {
                if (PendingUploads.ContainsKey(upload.AssetID))
                {
                    if (upload.Success)
                    {
                        // FIXME: Setup the TextureEntry with the new baked upload
                    }
                    else
                    {
                        Client.Log("Asset upload " + upload.AssetID.ToStringHyphenated() + " failed", 
                            Helpers.LogLevel.Warning);
                    }

                    PendingUploads.Remove(upload.AssetID);

                    if (PendingUploads.Count == 0 && ImageDownloads.Count == 0)
                    {
                        CachedResponseEvent.Set();
                    }
                }
                else
                {
                    // TEMP
                    Client.DebugLog("Upload " + upload.AssetID.ToStringHyphenated() + " was not found in PendingUploads");
                }
            }
        }
    }
}