using SharpDX;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace CodeWalker.GameFiles
{
    [TypeConverter(typeof(ExpandableObjectConverter))]
    public class YmapFile : GameFile, PackedFile
    {

        public Meta Meta { get; set; }
        public PsoFile Pso { get; set; }
        public RbfFile Rbf { get; set; }

        public CMapData _CMapData;

        public CMapData CMapData { get { return _CMapData; } set { _CMapData = value; } }
        public CEntityDef[] CEntityDefs { get; set; }
        public CMloInstanceDef[] CMloInstanceDefs { get; set; }
        public CCarGen[] CCarGens { get; set; }
        public CTimeCycleModifier[] CTimeCycleModifiers { get; set; }
        public MetaHash[] physicsDictionaries { get; set; }

        public Unk_975711773[] CBoxOccluders { get; set; }
        public Unk_2741784237[] COccludeModels { get; set; }


        public string[] Strings { get; set; }
        public YmapEntityDef[] AllEntities;
        public YmapEntityDef[] RootEntities;
        public YmapEntityDef[] MloEntities;

        public YmapFile[] ChildYmaps = null;
        public bool MergedWithParent = false;

        public YmapGrassInstanceBatch[] GrassInstanceBatches { get; set; }
        public YmapPropInstanceBatch[] PropInstanceBatches { get; set; }

        public YmapDistantLODLights DistantLODLights { get; set; }

        public YmapTimeCycleModifier[] TimeCycleModifiers { get; set; }

        public YmapCarGen[] CarGenerators { get; set; }

        public YmapBoxOccluder[] BoxOccluders { get; set; }
        public YmapOccludeModel[] OccludeModels { get; set; }


        //fields used by the editor:
        public bool HasChanged { get; set; } = false;
        public List<string> SaveWarnings = null;




        public YmapFile() : base(null, GameFileType.Ymap)
        {
        }
        public YmapFile(RpfFileEntry entry) : base(entry, GameFileType.Ymap)
        {
            RpfFileEntry = entry;
        }

        public void Load(byte[] data)
        {
            //direct load from a raw, compressed ymap file (openIV-compatible format)

            RpfResourceFileEntry resentry = new RpfResourceFileEntry();

            //hopefully this format has an RSC7 header...
            uint rsc7 = BitConverter.ToUInt32(data, 0);
            if (rsc7 == 0x37435352) //RSC7 header present!
            {
                int version = BitConverter.ToInt32(data, 4);
                resentry.SystemFlags = BitConverter.ToUInt32(data, 8);
                resentry.GraphicsFlags = BitConverter.ToUInt32(data, 12);
                if (data.Length > 16)
                {
                    int newlen = data.Length - 16; //trim the header from the data passed to the next step.
                    byte[] newdata = new byte[newlen];
                    Buffer.BlockCopy(data, 16, newdata, 0, newlen);
                    data = newdata;
                }
                else
                {
                    data = null; //shouldn't happen... empty..
                }
            }
            else
            {
                //direct load from file without the rpf header..
                //assume it's in resource meta format
                resentry.SystemFlags = RpfResourceFileEntry.GetFlagsFromSize(data.Length, 0);
                resentry.GraphicsFlags = RpfResourceFileEntry.GetFlagsFromSize(0, 2); //graphics type 2 for ymap
            }

            var oldresentry = RpfFileEntry as RpfResourceFileEntry;
            if (oldresentry != null) //update the existing entry with the new one
            {
                oldresentry.SystemFlags = resentry.SystemFlags;
                oldresentry.GraphicsFlags = resentry.GraphicsFlags;
                resentry.Name = oldresentry.Name;
                resentry.NameHash = oldresentry.NameHash;
                resentry.NameLower = oldresentry.NameLower;
                resentry.ShortNameHash = oldresentry.ShortNameHash;
            }
            else
            {
                RpfFileEntry = resentry; //just stick it in there for later...
            }

            data = ResourceBuilder.Decompress(data);


            Load(data, resentry);

            Loaded = true;
        }

        public void Load(byte[] data, RpfFileEntry entry)
        {
            Name = entry.Name;
            RpfFileEntry = entry;

            RpfResourceFileEntry resentry = entry as RpfResourceFileEntry;
            if (resentry == null)
            {
                NonMetaLoad(data);
                return;
            }

            ResourceDataReader rd = new ResourceDataReader(resentry, data);

            Meta = rd.ReadBlock<Meta>();



            CMapData = MetaTypes.GetTypedData<CMapData>(Meta, MetaName.CMapData);



            Strings = MetaTypes.GetStrings(Meta);
            if (Strings != null)
            {
                foreach (string str in Strings)
                {
                    JenkIndex.Ensure(str); //just shove them in there
                }
            }

            physicsDictionaries = MetaTypes.GetHashArray(Meta, CMapData.physicsDictionaries);


            EnsureEntities(Meta); //load all the entity data and create the YmapEntityDefs

            EnsureInstances(Meta);

            EnsureLodLights(Meta);

            EnsureDistantLODLights(Meta);

            EnsureTimeCycleModifiers(Meta);

            EnsureCarGens(Meta);

            EnsureBoxOccluders(Meta);

            EnsureOccludeModels(Meta);

            EnsureContainerLods(Meta);


            #region data block test and old code

            //foreach (var block in Meta.DataBlocks)
            //{
            //    switch (block.StructureNameHash)
            //    {
            //        case MetaName.STRING:
            //        case MetaName.POINTER:
            //        case MetaName.HASH:
            //        case MetaName.UINT:
            //        case MetaName.VECTOR3: //distant lod lights uses this
            //        case MetaName.CMapData:
            //        case MetaName.CEntityDef:
            //        case MetaName.CTimeCycleModifier: //these sections are handled already
            //        case MetaName.CCarGen:
            //        case MetaName.CLightAttrDef:
            //        case MetaName.CMloInstanceDef:
            //        case MetaName.CExtensionDefDoor:
            //        case MetaName.CExtensionDefLightEffect:
            //        case MetaName.CExtensionDefSpawnPointOverride:
            //        case MetaName.rage__fwGrassInstanceListDef: //grass instance buffer
            //        case MetaName.rage__fwGrassInstanceListDef__InstanceData: //grass instance buffer data
            //            break;
            //        case MetaName.PhVerletClothCustomBounds: //these sections still todo..
            //        case MetaName.SectionUNKNOWN1:
            //        case MetaName.SectionUNKNOWN5://occlusion vertex data container
            //        case MetaName.SectionUNKNOWN7://occlusion related?
            //            break;
            //        case (MetaName)17: //vertex data - occlusion related - SectionUNKNOWN5
            //            break;
            //        case (MetaName)33: //what is this? maybe lodlights related
            //            break;
            //        default:
            //            break;
            //    }
            //}



            //MetaTypes.ParseMetaData(Meta);

            //string shortname = resentry.Name.Substring(0, resentry.Name.LastIndexOf('.'));
            //uint namehash = JenkHash.GenHash(shortname);





            //CLightAttrDefs = MetaTypes.GetTypedDataArray<CLightAttrDef>(Meta, MetaName.CLightAttrDef);
            //if (CLightAttrDefs != null)
            //{ }


            //var unk5s = MetaTypes.GetTypedDataArray<SectionUNKNOWN5>(Meta, MetaName.SectionUNKNOWN5);
            //if (unk5s != null) //used in occlusion ymaps
            //{
            //    foreach (var unk5 in unk5s)
            //    {
            //        if ((unk5.verts.Ptr > 0) && (unk5.verts.Ptr <= (ulong)Meta.DataBlocks.Length))
            //        {
            //            var indicesoffset = unk5.Unk_853977995;
            //            var datablock = Meta.DataBlocks[((int)unk5.verts.Ptr) - 1];
            //            if (datablock != null)
            //            { }//vertex data... occlusion mesh?
            //        }
            //    }
            //}

            //var unk7s = MetaTypes.GetTypedDataArray<SectionUNKNOWN7>(Meta, MetaName.SectionUNKNOWN7);
            //if (unk7s != null)
            //{ } //used in occlusion ymaps

            //var unk10s = MetaTypes.GetTypedDataArray<SectionUNKNOWN10>(Meta, MetaName.SectionUNKNOWN10);
            //if (unk10s != null)
            //{ } //entity pointer array.. 

            //CDoors = MetaTypes.GetTypedDataArray<CExtensionDefDoor>(Meta, MetaName.CExtensionDefDoor);
            //if (CDoors != null)
            //{ } //needs work - doors can be different types? not enough bytes for one

            //CExtLightEffects = MetaTypes.GetTypedDataArray<CExtensionDefLightEffect>(Meta, MetaName.CExtensionDefLightEffect);
            //if (CExtLightEffects != null)
            //{ }

            //CSpawnOverrides = MetaTypes.GetTypedDataArray<CExtensionDefSpawnPointOverride>(Meta, MetaName.CExtensionDefSpawnPointOverride);
            //if (CSpawnOverrides != null)
            //{ }

            #endregion
        }



        private void NonMetaLoad(byte[] data)
        {
            //non meta not supported yet! but see what's in there...
            MemoryStream ms = new MemoryStream(data);
            if (RbfFile.IsRBF(ms))
            {
                var Rbf = new RbfFile();
                Rbf.Load(ms);
            }
            else if (PsoFile.IsPSO(ms))
            {
                var Pso = new PsoFile();
                Pso.Load(ms);
                //PsoTypes.EnsurePsoTypes(Pso);
            }
            else
            {
            }

        }



        private void EnsureEntities(Meta Meta)
        {
            //CMloInstanceDefs = MetaTypes.ConvertDataArray<CMloInstanceDef>(Meta, MetaName.CMloInstanceDef, CMapData.entities);
            CMloInstanceDefs = MetaTypes.GetTypedDataArray<CMloInstanceDef>(Meta, MetaName.CMloInstanceDef);
            if (CMloInstanceDefs != null)
            { }

            var eptrs = MetaTypes.GetPointerArray(Meta, CMapData.entities);
            //CEntityDefs = MetaTypes.ConvertDataArray<CEntityDef>(Meta, MetaName.CEntityDef, CMapData.entities);
            CEntityDefs = MetaTypes.GetTypedDataArray<CEntityDef>(Meta, MetaName.CEntityDef);
            if (CEntityDefs != null)
            { }




            int instcount = 0;
            if (CEntityDefs != null) instcount += CEntityDefs.Length;
            if (CMloInstanceDefs != null) instcount += CMloInstanceDefs.Length;

            if (instcount > 0)
            {

                //build the entity hierarchy.
                List<YmapEntityDef> roots = new List<YmapEntityDef>(instcount);
                List<YmapEntityDef> alldefs = new List<YmapEntityDef>(instcount);
                List<YmapEntityDef> mlodefs = null;

                if (CEntityDefs != null)
                {
                    for (int i = 0; i < CEntityDefs.Length; i++)
                    {
                        YmapEntityDef d = new YmapEntityDef(this, i, ref CEntityDefs[i]);
                        alldefs.Add(d);
                    }
                }
                if (CMloInstanceDefs != null)
                {
                    mlodefs = new List<YmapEntityDef>();
                    for (int i = 0; i < CMloInstanceDefs.Length; i++)
                    {
                        YmapEntityDef d = new YmapEntityDef(this, i, ref CMloInstanceDefs[i]);
                        uint[] unkuints = MetaTypes.GetUintArray(Meta, CMloInstanceDefs[i].Unk_1407157833);
                        if (d.MloInstance != null)
                        {
                            d.MloInstance.Unk_1407157833 = unkuints;
                        }
                        alldefs.Add(d);
                        mlodefs.Add(d);
                    }
                }


                for (int i = 0; i < alldefs.Count; i++)
                {
                    YmapEntityDef d = alldefs[i];
                    int pind = d.CEntityDef.parentIndex;
                    bool isroot = false;
                    if ((pind < 0) || (pind >= alldefs.Count) || (pind >= i)) //index check? might be a problem
                    {
                        isroot = true;
                    }
                    else
                    {
                        YmapEntityDef p = alldefs[pind];
                        if ((p.CEntityDef.lodLevel <= d.CEntityDef.lodLevel) ||
                            ((p.CEntityDef.lodLevel == Unk_1264241711.LODTYPES_DEPTH_ORPHANHD) &&
                             (d.CEntityDef.lodLevel != Unk_1264241711.LODTYPES_DEPTH_ORPHANHD)))
                        {
                            isroot = true;
                            p = null;
                        }
                    }

                    if (isroot)
                    {
                        roots.Add(d);
                    }
                    else
                    {
                        YmapEntityDef p = alldefs[pind];
                        p.AddChild(d);
                    }
                }
                for (int i = 0; i < alldefs.Count; i++)
                {
                    alldefs[i].ChildListToArray();
                }

                AllEntities = alldefs.ToArray();
                RootEntities = roots.ToArray();
                if (mlodefs != null)
                {
                    MloEntities = mlodefs.ToArray();
                }


                foreach (var ent in AllEntities)
                {
                    ent.Extensions = MetaTypes.GetExtensions(Meta, ent.CEntityDef.extensions);
                }
            }

        }

        private void EnsureInstances(Meta Meta)
        {
            if (CMapData.instancedData.GrassInstanceList.Count1 != 0)
            {
                rage__fwGrassInstanceListDef[] batches = MetaTypes.ConvertDataArray<rage__fwGrassInstanceListDef>(Meta, MetaName.rage__fwGrassInstanceListDef, CMapData.instancedData.GrassInstanceList);
                YmapGrassInstanceBatch[] gbatches = new YmapGrassInstanceBatch[batches.Length];
                for (int i = 0; i < batches.Length; i++)
                {
                    var batch = batches[i];
                    rage__fwGrassInstanceListDef__InstanceData[] instdatas = MetaTypes.ConvertDataArray<rage__fwGrassInstanceListDef__InstanceData>(Meta, MetaName.rage__fwGrassInstanceListDef__InstanceData, batch.InstanceList);
                    YmapGrassInstanceBatch gbatch = new YmapGrassInstanceBatch();
                    gbatch.Ymap = this;
                    gbatch.Batch = batch;
                    gbatch.Instances = instdatas;
                    gbatch.Position = (batch.BatchAABB.min.XYZ() + batch.BatchAABB.max.XYZ()) * 0.5f;
                    gbatch.Radius = (batch.BatchAABB.max.XYZ() - gbatch.Position).Length();
                    gbatch.AABBMin = (batch.BatchAABB.min.XYZ());
                    gbatch.AABBMax = (batch.BatchAABB.max.XYZ());
                    gbatches[i] = gbatch;
                }
                GrassInstanceBatches = gbatches;
            }
            if (CMapData.instancedData.PropInstanceList.Count1 != 0)
            {
            }
        }

        private void EnsureLodLights(Meta Meta)
        {
            //TODO!
            if (CMapData.LODLightsSOA.direction.Count1 != 0)
            {
            }
        }

        private void EnsureDistantLODLights(Meta Meta)
        {
            if (CMapData.DistantLODLightsSOA.position.Count1 != 0)
            {
                DistantLODLights = new YmapDistantLODLights();
                DistantLODLights.Ymap = this;
                DistantLODLights.CDistantLODLight = CMapData.DistantLODLightsSOA;
                DistantLODLights.colours = MetaTypes.GetUintArray(Meta, CMapData.DistantLODLightsSOA.RGBI);
                DistantLODLights.positions = MetaTypes.ConvertDataArray<MetaVECTOR3>(Meta, MetaName.VECTOR3, CMapData.DistantLODLightsSOA.position);
                DistantLODLights.CalcBB();
            }
        }

        private void EnsureTimeCycleModifiers(Meta Meta)
        {
            CTimeCycleModifiers = MetaTypes.ConvertDataArray<CTimeCycleModifier>(Meta, MetaName.CTimeCycleModifier, CMapData.timeCycleModifiers);
            if (CTimeCycleModifiers != null)
            {
                TimeCycleModifiers = new YmapTimeCycleModifier[CTimeCycleModifiers.Length];
                for (int i = 0; i < CTimeCycleModifiers.Length; i++)
                {
                    YmapTimeCycleModifier tcm = new YmapTimeCycleModifier();
                    tcm.Ymap = this;
                    tcm.CTimeCycleModifier = CTimeCycleModifiers[i];
                    tcm.BBMin = tcm.CTimeCycleModifier.minExtents;
                    tcm.BBMax = tcm.CTimeCycleModifier.maxExtents;
                    TimeCycleModifiers[i] = tcm;
                }
            }
        }

        private void EnsureCarGens(Meta Meta)
        {

            CCarGens = MetaTypes.ConvertDataArray<CCarGen>(Meta, MetaName.CCarGen, CMapData.carGenerators);
            if (CCarGens != null)
            {
                //string str = MetaTypes.GetTypesInitString(resentry, Meta); //to generate structinfos and enuminfos
                CarGenerators = new YmapCarGen[CCarGens.Length];
                for (int i = 0; i < CCarGens.Length; i++)
                {
                    CarGenerators[i] = new YmapCarGen(this, CCarGens[i]);
                }
            }
        }

        private void EnsureBoxOccluders(Meta meta)
        {
            CBoxOccluders = MetaTypes.ConvertDataArray<Unk_975711773>(Meta, (MetaName)975711773, CMapData.boxOccluders);
            if (CBoxOccluders != null)
            {
                BoxOccluders = new YmapBoxOccluder[CBoxOccluders.Length];
                for (int i = 0; i < CBoxOccluders.Length; i++)
                {
                    BoxOccluders[i] = new YmapBoxOccluder(this, CBoxOccluders[i]);
                }
            }
        }

        private void EnsureOccludeModels(Meta meta)
        {
            COccludeModels = MetaTypes.ConvertDataArray<Unk_2741784237>(Meta, (MetaName)2741784237, CMapData.occludeModels);
            if (COccludeModels != null)
            {
                OccludeModels = new YmapOccludeModel[COccludeModels.Length];
                for (int i = 0; i < COccludeModels.Length; i++)
                {
                    OccludeModels[i] = new YmapOccludeModel(this, COccludeModels[i]);
                }
            }
        }

        private void EnsureContainerLods(Meta meta)
        {

            //TODO: containerLods
            if (CMapData.containerLods.Count1 > 0)
            {
                //string str = MetaTypes.GetTypesInitString(Meta); //to generate structinfos and enuminfos


            }

        }


        public void BuildCEntityDefs()
        {
            //recreates the CEntityDefs array from AllEntities.
            if (AllEntities == null)
            {
                CEntityDefs = null;
                return;
            }

            int count = AllEntities.Length;
            CEntityDefs = new CEntityDef[count];
            for (int i = 0; i < count; i++)
            {
                CEntityDefs[i] = AllEntities[i].CEntityDef;
            }

            //TODO: MloInstanceDefs!

        }
        public void BuildCCarGens()
        {
            //recreates the CCarGens array from CarGenerators.
            if (CarGenerators == null)
            {
                CCarGens = null;
                return;
            }

            int count = CarGenerators.Length;
            CCarGens = new CCarGen[count];
            for (int i = 0; i < count; i++)
            {
                CCarGens[i] = CarGenerators[i].CCarGen;
            }
        }

        public byte[] Save()
        {
            //direct save to a raw, compressed ymap file (openIV-compatible format)


            //since Ymap object contents have been modified, need to recreate the arrays which are what is saved.
            BuildCEntityDefs();
            BuildCCarGens();


            //TODO:
            //BuildInstances();
            //BuildLodLights();
            //BuildDistantLodLights();
            //BuildTimecycleModifiers(); //already being saved - update them..
            //BuildBoxOccluders();
            //BuildOccludeModels();
            //BuildContainerLods();



            MetaBuilder mb = new MetaBuilder();


            var mdb = mb.EnsureBlock(MetaName.CMapData);

            CMapData mapdata = CMapData;


            if (CEntityDefs != null)
            {
                for (int i = 0; i < CEntityDefs.Length; i++)
                {
                    var yent = AllEntities[i]; //save the extensions..
                    CEntityDefs[i].extensions = mb.AddWrapperArrayPtr(yent.Extensions);
                }
            }

            mapdata.entities = mb.AddItemPointerArrayPtr(MetaName.CEntityDef, CEntityDefs);

            mapdata.timeCycleModifiers = mb.AddItemArrayPtr(MetaName.CTimeCycleModifier, CTimeCycleModifiers);

            mapdata.physicsDictionaries = mb.AddHashArrayPtr(physicsDictionaries);

            mapdata.carGenerators = mb.AddItemArrayPtr(MetaName.CCarGen, CCarGens);

            if (CMloInstanceDefs != null)
            {
                LogSaveWarning("CMloInstanceDefs were present, may not save properly. (TODO!)");
            }

            //clear everything out for now - TODO: fix
            if (mapdata.containerLods.Count1 != 0) LogSaveWarning("containerLods were not saved. (TODO!)");
            if (mapdata.occludeModels.Count1 != 0) LogSaveWarning("occludeModels were not saved. (TODO!)");
            if (mapdata.boxOccluders.Count1 != 0) LogSaveWarning("boxOccluders were not saved. (TODO!)");
            if (mapdata.instancedData.GrassInstanceList.Count1 != 0) LogSaveWarning("instancedData.GrassInstanceList was not saved. (TODO!)");
            if (mapdata.instancedData.PropInstanceList.Count1 != 0) LogSaveWarning("instancedData.PropInstanceList was not saved. (TODO!)");
            if (mapdata.LODLightsSOA.direction.Count1 != 0) LogSaveWarning("LODLightsSOA was not saved. (TODO!)");
            if (mapdata.DistantLODLightsSOA.position.Count1 != 0) LogSaveWarning("DistantLODLightsSOA was not saved. (TODO!)");
            mapdata.containerLods = new Array_Structure();
            mapdata.occludeModels = new Array_Structure();
            mapdata.boxOccluders = new Array_Structure();
            mapdata.instancedData = new rage__fwInstancedMapData();
            mapdata.LODLightsSOA = new CLODLight();
            mapdata.DistantLODLightsSOA = new CDistantLODLight();



            var block = new CBlockDesc();
            block.name = mb.AddStringPtr(Path.GetFileNameWithoutExtension(Name));
            block.exportedBy = mb.AddStringPtr("CodeWalker");
            block.time = mb.AddStringPtr(DateTime.UtcNow.ToString("dd MMMM yyyy HH:mm"));

            mapdata.block = block;


            string name = Path.GetFileNameWithoutExtension(Name);
            uint nameHash = JenkHash.GenHash(name);
            mapdata.name = new MetaHash(nameHash);//make sure name is upto date...


            mb.AddItem(MetaName.CMapData, mapdata);



            //make sure all the relevant structure and enum infos are present.
            mb.AddStructureInfo(MetaName.rage__fwInstancedMapData);
            mb.AddStructureInfo(MetaName.CLODLight);
            mb.AddStructureInfo(MetaName.CDistantLODLight);
            mb.AddStructureInfo(MetaName.CBlockDesc);
            mb.AddStructureInfo(MetaName.CMapData);
            mb.AddStructureInfo(MetaName.CEntityDef);
            mb.AddStructureInfo(MetaName.CTimeCycleModifier);
            if ((CCarGens != null) && (CCarGens.Length > 0))
            {
                mb.AddStructureInfo(MetaName.CCarGen);
            }

            mb.AddEnumInfo((MetaName)1264241711); //LODTYPES_
            mb.AddEnumInfo((MetaName)648413703);  //PRI_


            Meta meta = mb.GetMeta();

            byte[] data = ResourceBuilder.Build(meta, 2); //ymap is version 2...


            return data;
        }

        private void LogSaveWarning(string w)
        {
            if (SaveWarnings == null) SaveWarnings = new List<string>();
            SaveWarnings.Add(w);
        }




        public void EnsureChildYmaps(GameFileCache gfc)
        {
            if (ChildYmaps == null)
            {
                //no children here... look for child ymap....
                var node = gfc.GetMapNode(RpfFileEntry.ShortNameHash);
                if ((node != null) && (node.Children != null) && (node.Children.Length > 0))
                {
                    ChildYmaps = new YmapFile[node.Children.Length];
                    for (int i = 0; i < ChildYmaps.Length; i++)
                    {
                        var chash = node.Children[i].Name;
                        ChildYmaps[i] = gfc.GetYmap(chash);
                        if (ChildYmaps[i] == null)
                        {
                            //couldn't find child ymap..
                        }
                    }
                }
            }


            bool needupd = false;
            if (ChildYmaps != null)
            {
                for (int i = 0; i < ChildYmaps.Length; i++)
                {
                    var cmap = ChildYmaps[i];
                    if (cmap == null) continue; //nothing here..
                    if (!cmap.Loaded)
                    {
                        //ChildYmaps[i] = gfc.GetYmap(cmap.Hash); //incase no load was requested.
                        cmap = gfc.GetYmap(cmap.Key.Hash);
                        ChildYmaps[i] = cmap;
                    }
                    if ((cmap.Loaded) && (!cmap.MergedWithParent))
                    {
                        needupd = true;
                    }
                }
            }

            if ((ChildYmaps != null) && needupd)
            {
                List<YmapEntityDef> newroots = new List<YmapEntityDef>(RootEntities);
                for (int i = 0; i < ChildYmaps.Length; i++)
                {
                    var cmap = ChildYmaps[i];
                    if (cmap == null) continue; //nothing here..
                    //cmap.EnsureChildYmaps();
                    if ((cmap.Loaded) && (!cmap.MergedWithParent))
                    {
                        cmap.MergedWithParent = true;
                        if (cmap.RootEntities != null)
                        {
                            foreach (var rcent in cmap.RootEntities)
                            {
                                int pind = rcent.CEntityDef.parentIndex;
                                if (pind < 0)
                                {
                                    if (rcent.CEntityDef.lodLevel != Unk_1264241711.LODTYPES_DEPTH_ORPHANHD)
                                    {
                                    }
                                    //pind = 0;
                                }
                                if ((pind >= 0) && (pind < AllEntities.Length))
                                {
                                    var pentity = AllEntities[pind];
                                    pentity.AddChild(rcent);
                                }
                                else
                                {
                                    //TODO: fix this!!
                                    //newroots.Add(rcent); //not sure this is the right approach.
                                    //////rcent.Owner = this;
                                }
                            }
                        }
                    }
                }
                if (AllEntities != null)
                {
                    for (int i = 0; i < AllEntities.Length; i++)
                    {
                        AllEntities[i].ChildListToMergedArray();
                    }
                }

                RootEntities = newroots.ToArray();
            }


        }




        public void AddEntity(YmapEntityDef ent)
        {
            //used by the editor to add to the ymap.

            List<YmapEntityDef> allents = new List<YmapEntityDef>();
            if (AllEntities != null) allents.AddRange(AllEntities);
            ent.Index = allents.Count;
            ent.Ymap = this;
            allents.Add(ent);
            AllEntities = allents.ToArray();


            if ((ent.Parent == null) || (ent.Parent.Ymap != this))
            {
                //root entity, add to roots.

                List<YmapEntityDef> rootents = new List<YmapEntityDef>();
                if (RootEntities != null) rootents.AddRange(RootEntities);
                rootents.Add(ent);
                RootEntities = rootents.ToArray();
            }

            HasChanged = true;
        }

        public bool RemoveEntity(YmapEntityDef ent)
        {
            //used by the editor to remove from the ymap.
            if (ent == null) return false;

            var res = true;

            int idx = ent.Index;
            List<YmapEntityDef> newAllEntities = new List<YmapEntityDef>();
            List<YmapEntityDef> newRootEntities = new List<YmapEntityDef>();

            for (int i = 0; i < AllEntities.Length; i++)
            {
                var oent = AllEntities[i];
                oent.Index = newAllEntities.Count;
                if (oent != ent) newAllEntities.Add(oent);
                else if (i != idx)
                {
                    res = false; //indexes didn't match.. this shouldn't happen!
                }
            }
            for (int i = 0; i < RootEntities.Length; i++)
            {
                var oent = RootEntities[i];
                if (oent != ent) newRootEntities.Add(oent);
            }

            if ((AllEntities.Length == newAllEntities.Count) || (RootEntities.Length == newRootEntities.Count))
            {
                res = false;
            }

            AllEntities = newAllEntities.ToArray();
            RootEntities = newRootEntities.ToArray();

            HasChanged = true;

            return res;
        }


        public void AddCarGen(YmapCarGen cargen)
        {
            List<YmapCarGen> cargens = new List<YmapCarGen>();
            if (CarGenerators != null) cargens.AddRange(CarGenerators);
            cargen.Ymap = this;
            cargens.Add(cargen);
            CarGenerators = cargens.ToArray();

            HasChanged = true;
        }

        public bool RemoveCarGen(YmapCarGen cargen)
        {
            if (cargen == null) return false;

            List<YmapCarGen> newcargens = new List<YmapCarGen>();

            if (CarGenerators != null)
            {
                for (int i = 0; i < CarGenerators.Length; i++)
                {
                    var cg = CarGenerators[i];
                    if (cg != cargen)
                    {
                        newcargens.Add(cg);
                    }
                }
                if (newcargens.Count == CarGenerators.Length)
                {
                    return false; //nothing removed... wasn't present?
                }
            }


            CarGenerators = newcargens.ToArray();

            HasChanged = true;

            return true;
        }


    }


    [TypeConverter(typeof(ExpandableObjectConverter))]
    public class YmapEntityDef
    {
        public Archetype Archetype { get; set; } //cached by GameFileCache on loading...
        public Vector3 BBMin;//oriented archetype AABBmin
        public Vector3 BBMax;//oriented archetype AABBmax
        public Vector3 BSCenter; //oriented archetype BS center
        public float BSRadius;//cached from archetype

        public CEntityDef _CEntityDef;
        public CEntityDef CEntityDef { get { return _CEntityDef; } set { _CEntityDef = value; } }
        private List<YmapEntityDef> ChildList { get; set; }
        public YmapEntityDef[] Children { get; set; }
        public YmapEntityDef[] ChildrenMerged;// { get; set; }
        public Vector3 Position { get; set; }
        public Quaternion Orientation { get; set; }
        public Vector3 Scale { get; set; }
        public bool IsMlo { get; set; }
        public MloInstanceData MloInstance { get; set; }
        public YmapEntityDef MloParent { get; set; }
        public Vector3 MloRefPosition { get; set; }
        public Quaternion MloRefOrientation { get; set; }
        public MetaWrapper[] Extensions { get; set; }

        public bool ChildrenRendered; //used when rendering ymap mode to reduce LOD flashing...

        public int Index { get; set; }
        public Vector3 CamRel; //used for rendering...
        public float Distance; //used for rendering
        public bool IsVisible; //used for rendering
        public bool Rendered; //used for rendering
        public bool ChildRendered; //used for rendering
        public bool ChildrenVisible; //used for rendering
        public bool ChildrenLoading; //used for rendering
        public float LargestChildLodDist; //used for rendering
        public YmapEntityDef Parent { get; set; } //used for rendering
        public uint ParentGuid { get; set; } //used for rendering
        public MetaHash ParentName { get; set; } //used for rendering

        public YmapFile Ymap { get; set; }

        public Vector3 PivotPosition = Vector3.Zero;
        public Quaternion PivotOrientation = Quaternion.Identity;
        public Vector3 WidgetPosition = Vector3.Zero;
        public Quaternion WidgetOrientation = Quaternion.Identity;


        public string Name
        {
            get
            {
                return _CEntityDef.archetypeName.ToString();
            }
        }


        public YmapEntityDef()
        {
            Scale = Vector3.One;
            Position = Vector3.One;
            Orientation = Quaternion.Identity;
        }
        public YmapEntityDef(YmapFile ymap, int index, ref CEntityDef def)
        {
            Ymap = ymap;
            Index = index;
            CEntityDef = def;
            Scale = new Vector3(new Vector2(CEntityDef.scaleXY), CEntityDef.scaleZ);
            Position = CEntityDef.position;
            Orientation = new Quaternion(CEntityDef.rotation);
            if (Orientation != Quaternion.Identity)
            {
                Orientation = Quaternion.Invert(Orientation);
            }
            IsMlo = false;

            UpdateWidgetPosition();
            UpdateWidgetOrientation();
        }

        public YmapEntityDef(YmapFile ymap, int index, ref CMloInstanceDef mlo)
        {
            Ymap = ymap;
            Index = index;
            CEntityDef = mlo.CEntityDef;
            Scale = new Vector3(new Vector2(CEntityDef.scaleXY), CEntityDef.scaleZ);
            Position = CEntityDef.position;
            Orientation = new Quaternion(CEntityDef.rotation);
            //if (Orientation != Quaternion.Identity)
            //{
            //    Orientation = Quaternion.Invert(Orientation);
            //}
            IsMlo = true;

            MloInstance = new MloInstanceData();
            MloInstance.Instance = mlo;

            UpdateWidgetPosition();
            UpdateWidgetOrientation();
        }


        public void SetArchetype(Archetype arch)
        {
            Archetype = arch;
            if (Archetype != null)
            {
                float smax = Math.Max(Scale.X, Scale.Z);
                BSRadius = Archetype.BSRadius * smax;
                BSCenter = Orientation.Multiply(Archetype.BSCenter) * Scale;
                if (Orientation == Quaternion.Identity)
                {
                    BBMin = (Archetype.BBMin * Scale) + Position;
                    BBMax = (Archetype.BBMax * Scale) + Position;
                }
                else
                {
                    BBMin = Position - BSRadius;
                    BBMax = Position + BSRadius;
                    ////not ideal: should transform all 8 corners!
                }

                if (Archetype.Type == MetaName.CMloArchetypeDef)
                {
                    //transform interior entities into world space...
                    var mloa = Archetype as MloArchetype;
                    if (MloInstance == null)
                    {
                        MloInstance = new MloInstanceData();
                    }
                    MloInstance.CreateYmapEntities(this, mloa);

                    if (BSRadius == 0.0f)
                    {
                        BSRadius = CEntityDef.lodDist;//need something so it doesn't get culled...
                    }
                }

            }

        }

        public void SetPosition(Vector3 pos)
        {
            if (MloParent != null)
            {
                //TODO: SetPosition for interior entities!
                Position = pos;
                var inst = MloParent.MloInstance;
                if (inst != null)
                {
                    //transform world position into mlo space
                    //MloRefPosition = ...
                    //MloRefOrientation = ...
                }
            }
            else
            {
                Position = pos;
                _CEntityDef.position = pos;

                if (Archetype != null)
                {
                    BSCenter = Orientation.Multiply(Archetype.BSCenter) * Scale;
                }
                if ((Archetype != null) && (Orientation == Quaternion.Identity))
                {
                    BBMin = (Archetype.BBMin * Scale) + Position;
                    BBMax = (Archetype.BBMax * Scale) + Position;
                }
                else
                {
                    BBMin = Position - (BSRadius);
                    BBMax = Position + (BSRadius);
                    ////not ideal: should transform all 8 corners!
                }



                UpdateWidgetPosition();
            }


            if (MloInstance != null)
            {
                MloInstance.UpdateEntities();
            }

        }

        public void SetOrientation(Quaternion ori)
        {
            Orientation = ori;
            Quaternion qinv = Quaternion.Normalize(Quaternion.Invert(ori));
            _CEntityDef.rotation = new Vector4(qinv.X, qinv.Y, qinv.Z, qinv.W);

            if (Archetype != null)
            {
                BSCenter = Orientation.Multiply(Archetype.BSCenter) * Scale;
            }

            UpdateWidgetPosition();
            UpdateWidgetOrientation();
        }
        public void SetOrientationInv(Quaternion inv)
        {
            _CEntityDef.rotation = new Vector4(inv.X, inv.Y, inv.Z, inv.W);
            Orientation = Quaternion.Normalize(Quaternion.Invert(inv));

            if (Archetype != null)
            {
                BSCenter = Orientation.Multiply(Archetype.BSCenter) * Scale;
            }

            UpdateWidgetPosition();
            UpdateWidgetOrientation();
        }

        public void SetScale(Vector3 s)
        {
            Scale = new Vector3(s.X, s.X, s.Z);
            _CEntityDef.scaleXY = s.X;
            _CEntityDef.scaleZ = s.Z;
            if (Archetype != null)
            {
                float smax = Math.Max(Scale.X, Scale.Z);
                BSRadius = Archetype.BSRadius * smax;
            }
            SetPosition(Position);//update the BB
        }



        public void SetPivotPosition(Vector3 pos)
        {
            PivotPosition = pos;

            UpdateWidgetPosition();
        }

        public void SetPivotOrientation(Quaternion ori)
        {
            PivotOrientation = ori;

            UpdateWidgetOrientation();
        }


        public void SetPositionFromWidget(Vector3 pos)
        {
            SetPosition(pos - Orientation.Multiply(PivotPosition));
        }
        public void SetOrientationFromWidget(Quaternion ori)
        {
            var newori = Quaternion.Normalize(Quaternion.Multiply(ori, Quaternion.Invert(PivotOrientation)));
            var newpos = WidgetPosition - newori.Multiply(PivotPosition);
            SetOrientation(newori);
            SetPosition(newpos);
        }
        public void SetPivotPositionFromWidget(Vector3 pos)
        {
            var orinv = Quaternion.Invert(Orientation);
            SetPivotPosition(orinv.Multiply(pos - Position));
        }
        public void SetPivotOrientationFromWidget(Quaternion ori)
        {
            var orinv = Quaternion.Invert(Orientation);
            SetPivotOrientation(Quaternion.Multiply(orinv, ori));
        }


        public void UpdateWidgetPosition()
        {
            WidgetPosition = Position + Orientation.Multiply(PivotPosition);
        }
        public void UpdateWidgetOrientation()
        {
            WidgetOrientation = Quaternion.Multiply(Orientation, PivotOrientation);
        }


        public void AddChild(YmapEntityDef c)
        {
            if (ChildList == null)
            {
                ChildList = new List<YmapEntityDef>();
            }
            c.Parent = this;
            c.ParentGuid = CEntityDef.guid;
            c.ParentName = CEntityDef.archetypeName;

            ChildList.Add(c);
        }

        public void ChildListToArray()
        {
            if (ChildList == null) return;
            //if (Children == null)
            //{
            Children = ChildList.ToArray();
            ChildrenMerged = Children;//include these by default in merged array
            //}
            //else
            //{
            //    List<YmapEntityDef> newc = new List<YmapEntityDef>(Children.Length + ChildList.Count);
            //    newc.AddRange(Children);
            //    newc.AddRange(ChildList);
            //    Children = newc.ToArray();
            //}
            ChildList.Clear();
            ChildList = null;
        }
        public void ChildListToMergedArray()
        {
            if (ChildList == null) return;
            if (ChildrenMerged == null)
            {
                ChildrenMerged = ChildList.ToArray();
            }
            else
            {
                List<YmapEntityDef> newc = new List<YmapEntityDef>(ChildrenMerged.Length + ChildList.Count);
                newc.AddRange(ChildrenMerged);
                newc.AddRange(ChildList);
                ChildrenMerged = newc.ToArray();
            }
            ChildList.Clear();
            ChildList = null;
        }

        public override string ToString()
        {
            return CEntityDef.ToString() + ((ChildList != null) ? (" (" + ChildList.Count.ToString() + " children) ") : " ") + CEntityDef.lodLevel.ToString();
        }

    }


    [TypeConverter(typeof(ExpandableObjectConverter))]
    public class YmapGrassInstanceBatch
    {
        public Archetype Archetype { get; set; } //cached by GameFileCache on loading...
        public rage__fwGrassInstanceListDef Batch { get; set; }
        public rage__fwGrassInstanceListDef__InstanceData[] Instances { get; set; }
        public Vector3 Position { get; set; } //calculated from AABB
        public float Radius { get; set; } //calculated from AABB
        public Vector3 AABBMin { get; set; }
        public Vector3 AABBMax { get; set; }
        public Vector3 CamRel; //used for rendering...
        public float Distance; //used for rendering
        public YmapFile Ymap { get; set; }

        public override string ToString()
        {
            return Batch.ToString();
        }
    }

    [TypeConverter(typeof(ExpandableObjectConverter))]
    public class YmapPropInstanceBatch
    {
        public YmapFile Ymap { get; set; }

    }

    [TypeConverter(typeof(ExpandableObjectConverter))]
    public class YmapDistantLODLights
    {
        public CDistantLODLight CDistantLODLight { get; set; }
        public uint[] colours { get; set; }
        public MetaVECTOR3[] positions { get; set; }

        public Vector3 BBMin { get; set; }
        public Vector3 BBMax { get; set; }
        public YmapFile Ymap { get; set; }

        public void CalcBB()
        {
            if (positions != null)
            {
                Vector3 min = new Vector3(float.MaxValue);
                Vector3 max = new Vector3(float.MinValue);
                for (int i = 0; i < positions.Length; i++)
                {
                    var p = positions[i];
                    Vector3 pv = p.ToVector3();
                    min = Vector3.Min(min, pv);
                    max = Vector3.Max(max, pv);
                }
                BBMin = min;
                BBMax = max;
            }

        }
    }


    [TypeConverter(typeof(ExpandableObjectConverter))]
    public class YmapTimeCycleModifier
    {
        public CTimeCycleModifier CTimeCycleModifier { get; set; }
        public World.TimecycleMod TimeCycleModData { get; set; }

        public Vector3 BBMin { get; set; }
        public Vector3 BBMax { get; set; }

        public YmapFile Ymap { get; set; }
    }


    [TypeConverter(typeof(ExpandableObjectConverter))]
    public class YmapCarGen
    {
        public CCarGen _CCarGen;
        public CCarGen CCarGen { get { return _CCarGen; } set { _CCarGen = value; } }

        public Vector3 Position { get; set; }
        public Quaternion Orientation { get; set; }
        public Vector3 BBMin { get; set; }
        public Vector3 BBMax { get; set; }

        public YmapFile Ymap { get; set; }


        public YmapCarGen(YmapFile ymap, CCarGen cargen)
        {
            float hlen = cargen.perpendicularLength * 0.5f;
            Ymap = ymap;
            CCarGen = cargen;
            Position = cargen.position;
            CalcOrientation();
            BBMin = new Vector3(-hlen);
            BBMax = new Vector3(hlen);
        }


        public void CalcOrientation()
        {
            float angl = (float)Math.Atan2(_CCarGen.orientY, _CCarGen.orientX);
            Orientation = Quaternion.RotationYawPitchRoll(0.0f, 0.0f, angl);
        }

        public void SetPosition(Vector3 pos)
        {
            Position = pos;
            _CCarGen.position = pos;
        }
        public void SetOrientation(Quaternion ori)
        {
            Orientation = ori;

            float len = Math.Max(_CCarGen.perpendicularLength * 1.5f, 5.0f);
            Vector3 v = new Vector3(len, 0, 0);
            Vector3 t = ori.Multiply(v);

            _CCarGen.orientX = t.X;
            _CCarGen.orientY = t.Y;
        }
        public void SetScale(Vector3 scale)
        {
            float s = scale.X;
            float hlen = s * 0.5f;
            _CCarGen.perpendicularLength = s;

            BBMin = new Vector3(-hlen);
            BBMax = new Vector3(hlen);
        }

        public void SetLength(float length)
        {
            _CCarGen.perpendicularLength = length;
            float hlen = length * 0.5f;

            BBMin = new Vector3(-hlen);
            BBMax = new Vector3(hlen);
        }

        public override string ToString()
        {
            return _CCarGen.carModel.ToString() + ", " + Position.ToString() + ", " + _CCarGen.popGroup.ToString() + ", " + _CCarGen.livery.ToString();
        }
    }


    [TypeConverter(typeof(ExpandableObjectConverter))]
    public class YmapOccludeModel
    {
        public Unk_2741784237 _OccludeModel;
        public Unk_2741784237 OccludeModel { get { return _OccludeModel; } set { _OccludeModel = value; } }

        public YmapFile Ymap { get; set; }


        public YmapOccludeModel(YmapFile ymap, Unk_2741784237 model)
        {
            Ymap = ymap;
            _OccludeModel = model;
        }
    }

    [TypeConverter(typeof(ExpandableObjectConverter))]
    public class YmapBoxOccluder
    {
        public Unk_975711773 _Box;
        public Unk_975711773 Box { get { return _Box; } set { _Box = value; } }

        public YmapFile Ymap { get; set; }

        public YmapBoxOccluder(YmapFile ymap, Unk_975711773 box)
        {
            Ymap = ymap;
            _Box = box;
        }

    }

}