using log4net;
using Mono.Addins;
using Nini.Config;
using OpenMetaverse;
using OpenMetaverse.StructuredData;
using OpenSim.Framework;
using OpenSim.Modules.Appearance2Avatar.helper;
using OpenSim.Region.Framework.Interfaces;
using OpenSim.Region.Framework.Scenes;
using OpenSim.Region.ScriptEngine.Interfaces;
using OpenSim.Region.ScriptEngine.Shared.Api;
using OpenSim.Region.ScriptEngine.Shared.Api.Interfaces;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

[assembly: Addin("Appearance2Avatar", "0.1")]
[assembly: AddinDependency("OpenSim.Region.Framework", OpenSim.VersionInfo.VersionNumber)]
namespace OpenSim.Modules.Appearance2Avatar
{
    [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "Appearance2Avatar")]

    public class Appearance2Avatar : INonSharedRegionModule
    {
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        private IScriptModuleComms m_scriptModule = null;
        public static Scene m_scene = null;

        public string Name
        {
            get { return "Appearance2Avatar"; }
        }

        public Type ReplaceableInterface
        {
            get { return null; }
        }

        public void AddRegion(Scene scene)
        {

        }

        public void Close()
        {

        }

        public void Initialise(IConfigSource source)
        {
            
        }

        public void RegionLoaded(Scene scene)
        {
            m_scriptModule = scene.RequestModuleInterface<IScriptModuleComms>();
            if (m_scriptModule != null)
            {
                m_scriptModule.RegisterScriptInvocation(this, "osAppearance2Avatar");
            }

            m_scene = scene;
        }

        public void RemoveRegion(Scene scene)
        {
            
        }

        protected string LoadNotecard(SceneObjectPart host, String notecardname)
        {
            IScriptEngine wComm = m_scene.RequestModuleInterface<IScriptEngine>();

            IOSSL_Api _api = (IOSSL_Api)wComm.GetApi(host.UUID, "LSL");
            return _api.osGetNotecard(notecardname);
        }

        [ScriptInvocation]
        public void osAppearance2Avatar(UUID hostID, UUID scriptID, String notecard, String targetAvatar)
        {
            SceneObjectPart _host = m_scene.GetSceneObjectPart(hostID);
            ScenePresence sp = m_scene.GetScenePresence(UUID.Parse(targetAvatar));

            if(_host != null)
            {
                if (sp != null)
                {
                    TaskInventoryItem notecardItem = _host.Inventory.GetInventoryItems().Find(X => X.Name == notecard);

                    if (notecardItem != null)
                    {
                        if (notecardItem.Type != 7)
                        {
                            throw new Exception("Given item is not a notecard.");
                            return;
                        }

                        m_log.Info("[" + Name + "] Info: Fetch asset data for notecard.");
                        String asset = LoadNotecard(_host, notecard);

                        if (asset != null)
                        {
                            m_log.Info(asset);

                            m_log.Info("[" + Name + "] Info: Deserialize notecard.");
                            OSDMap appearanceOsd = (OSDMap)OSDParser.DeserializeLLSDXml(asset);
                            AvatarAppearance appearance = new AvatarAppearance();
                            appearance.Unpack(appearanceOsd);

                            m_log.Info("[" + Name + "] Info: Overwrite appearance");
                            sp.Appearance = appearance;
                            sp.TriggerScenePresenceUpdated();

                            m_scene.ForEachClient(
                            client =>
                            {
                                sp.SendFullUpdateToClient(client);
                            });
                        }
                        else
                        {
                            m_log.Error("[" + Name + "] ERROR: Cant get asset data for appearance notecard");
                            throw new Exception("Cant get asset data for appearance notecard");
                        }

                    }
                    else
                    {
                        m_log.Error("[" + Name + "] ERROR: Notecard not found in objekt inventory");
                        throw new Exception("Notecard not found in objekt inventory");
                    }
                }
                else
                {
                    m_log.Error("[" + Name + "] ERROR: Target not found in region");
                    throw new Exception("Target not found in region");
                }
            }
            else
            {
                m_log.Error("[" + Name + "] ERROR: Cant find objekt inworld");
                throw new Exception("Cant find objekt inworld");
            }
        }
    }
}