using System;
using System.Runtime.InteropServices;
using UnityEngine;

namespace udSDK
{
    public enum udProjectGeometryType { 
        //These are the geometry types for nodes 
        udPGT_None, //!<There is no geometry associated with this node.
        udPGT_Point, //!<pCoordinates is a single 3D position
        udPGT_MultiPoint, //!<Array of udPGT_Point, pCoordinates is an array of 3D positions.
        udPGT_LineString, //!<pCoordinates is an array of 3D positions forming an open line
        udPGT_MultiLineString, //!<Array of udPGT_LineString; pCoordinates is NULL and children will be present.
        udPGT_Polygon, //!<pCoordinates will be a closed linear ring (the outside), there MAY be children that are interior as pChildren udPGT_MultiLineString items, these should be counted as islands of the external ring.
        udPGT_MultiPolygon, //!<pCoordinates is null, children will be udPGT_Polygon (which still may have internal islands)
        udPGT_GeometryCollection, //!<Array of geometries; pCoordinates is NULL and children may be present of any type.
        udPGT_Count, //!<Total number of geometry types. Used internally but can be used as an iterator max when displaying different type modes.
        udPGT_Internal, //!<Used internally when calculating other types. Do not use.
	}

    public enum udProjectNodeType
    {
        /*
        This represents the type of data stored in the node.

        Note

        The itemtypeStr in the udProjectNode is a string version. This enum serves to simplify the reading of standard types. The the string in brackets at the end of the comment is the string.
        */
        udPNT_Custom, //!< Need to check the itemtypeStr string manually

        udPNT_PointCloud, //!< A Euclideon Unlimited Detail Point Cloud file ("UDS")
        udPNT_PointOfInterest, //!< A point, line or region describing a location of interest ("POI")
        udPNT_Folder, //!< A folder of other nodes ("Folder")
        udPNT_Media, //!< An Image, Movie, Audio file or other media object ("Media")
        udPNT_Viewpoint, //!< An Camera Location & Orientation ("Camera")
        udPNT_VisualisationSettings, //!< Visualisation settings (itensity, map height etc) ("VizSet")
        udPNT_I3S, //!< An Indexed 3d Scene Layer (I3S) or Scene Layer Package (SLPK) dataset ("I3S")
        udPNT_Water, //!< A region describing the location of a body of water ("Water")
        udPNT_ViewShed, //!< A point describing where to generate a view shed from ("ViewMap")
        udPNT_Polygon, //!< A polygon model, usually an OBJ or FBX ("Polygon")
        udPNT_QueryFilter, //!< A query filter to be applied to all PointCloud types in the scene ("QFilter")
        udPNT_Places, //!< A collection of places that can be grouped together at a distance ("Places")
        udPNT_HeightMeasurement, //!< A height measurement object ("MHeight")
        udPNT_GTFS, //!< A General Transit Feed Specification object ("GTFS")
        udPNT_Count //!< Total number of node types. Used internally but can be used as an iterator max when displaying different type modes.
    }

    public enum udProjectLoadSource 
    {
        udProjectLoadSource_Memory, //!< The project source exists in memory; udProject_CreateInMemory, udProject_LoadFromMemory or udProject_SaveToMemory
        udProjectLoadSource_Server, //!< The project source exists from the server; udProject_CreateInServer, udProject_LoadFromServer or udProject_SaveToServer
        udProjectLoadSource_URI, //!< The project source exists from a file or URL; udProject_CreateInFile, udProject_LoadFromFile or udProject_SaveToFile

        udProjectLoadSource_Count //!< Total number of source types. Used internally but can be used as an iterator max when displaying different source types.
    }
    
    [StructLayout(LayoutKind.Sequential)]
    public struct udProjectNode
    {
        /*
        Stores the state of a node.

        Warning

            This struct is exposed to avoid having a huge API of accessor functions but it should be treated as read only with the exception of pUserData. Making changes to the internal data will cause issues syncronising data

        */
        public readonly bool isVisible;

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 37)]
        public readonly char[] UUID; //!<Unique identifier for this node “id”.

        public readonly double lastUpdate; //!<The last time this node was updated in UTC.

        public readonly udProjectNodeType itemtype; //!<The type of this node, see udProjectNodeType for more information.

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
        public readonly char[] itemtypeStr; //!<The string representing the type of node. If its a known type during node creation itemtype will be set to something other than udPNT_Custom.

        public readonly IntPtr pName; //!<Human readable name of the item.

        public readonly IntPtr pURI; //!<The address or filename that the resource can be found.

        public readonly bool hasBoundingBox; //!<Set to true if this nodes boundingBox item is filled out.

        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
        public readonly double[] boundingBox; //!<The bounds of this model, ordered as [West, South, Floor, East, North, Ceiling].

        public readonly udProjectGeometryType geomtype; //!<Indicates what geometry can be found in this model. See the udProjectGeometryType documentation for more information.

        public readonly int geomCount; //!<How many geometry items can be found on this model.

        public readonly IntPtr pCoordinates; //!<The positions of the geometry of this node (NULL this this node doesn’t have points). The format is [X0,Y0,Z0,…Xn,Yn,Zn].

        public readonly IntPtr pNextSibling; //!<This is the next item in the project (NULL if no further siblings)

        public readonly IntPtr pFirstChild; //!<Some types (“folder”, “collection”, “polygon”…) have children nodes, NULL if there are no children.

        IntPtr pUserData; //!<This is application specific user data. The application should traverse the tree to release these before releasing the udProject.

        public readonly IntPtr pInternalData; //!<Internal udSDK specific state for this node.
    }

	public class UDProject
	{
        IntPtr pudProject;
        public IntPtr pRootNode;

        public UDProject(string geoJSON)
        {
            if(!GlobalUDContext.isCreated)
                throw new Exception("Global context not loaded, cannot load project.");

            UnityEngine.Debug.Log("Attempting project load from memory"); 
            udError err = udProject_LoadFromMemory(GlobalUDContext.uContext.pContext, ref pudProject, geoJSON);

            if(err != udError.udE_Success)
                throw new Exception("project load failed: "+ err.ToString());

            pRootNode = IntPtr.Zero;
            udProject_GetProjectRoot(pudProject, ref pRootNode);
            UnityEngine.Debug.Log("Project loaded"); 
        }

        ~UDProject()
        {
            udProject_Release(ref pudProject);
        }

        
        //Create an empty, local only, instance of udProject.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProject_CreateLocal(ref IntPtr ppProject, string pName);
        //Create a local only instance of udProject filled in with the contents of a GeoJSON string.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProject_LoadFromMemory(IntPtr pContext, ref IntPtr ppProject, string pGeoJSON);
        //Destroy the instance of the project.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProject_Release(ref IntPtr ppProject);
        //Export a project to a GeoJSON string in memory.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProject_SaveToMemory(IntPtr pContext, IntPtr pProject, ref IntPtr ppMemory);
        //Get the project root node.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProject_GetProjectRoot(IntPtr pProject, ref IntPtr ppRootNode);
        //Get the state of unsaved local changes
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProject_HasUnsavedChanges(IntPtr pProject);
        [DllImport(UDSDKLibrary.name)]
        private static extern string udProject_GetTypeName(udProjectNodeType itemtype);
        
	}

    public class UDProjectNode
    {
        public IntPtr pNode;
        public udProjectNode nodeData;

        public UDProjectNode(IntPtr nodeAddr)
        {
            pNode = nodeAddr;
            this.nodeData = (udProjectNode) Marshal.PtrToStructure(nodeAddr, typeof(udProjectNode));
        }

        //Create a node in a project
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_Create(IntPtr pProject, IntPtr ppNode, ref udProjectNode pParent, string pType, string pName, string pURI, IntPtr pUserData);
        //Move a node to reorder within the current parent or move to a different parent.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_MoveChild(IntPtr pProject, ref udProjectNode pCurrentParent, ref udProjectNode pNewParent, ref udProjectNode pNode, ref udProjectNode pInsertBeforeChild);
        //Remove a node from the project.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_RemoveChild(IntPtr pProject, ref udProjectNode pParentNode, ref udProjectNode pNode);
        //Set the human readable name of a node.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_SetName(IntPtr pProject, ref udProjectNode pNode, string pNodeName);
        //Set the URI of a node.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_SetURI(IntPtr pProject, ref udProjectNode pNode, string pNodeURI);
        //Set the new geometry of a node.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_SetGeometry(IntPtr pProject, ref udProjectNode pNode, udProjectGeometryType nodeType, int geometryCount, ref double pCoordinates);
        //Get a metadata item of a node as an integer.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_GetMetadataInt(ref udProjectNode pNode, string pMetadataKey, ref Int32 pInt, Int32 defaultValue);
        //Set a metadata item of a node from an integer.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_SetMetadataInt(ref udProjectNode pNode, string pMetadataKey, Int32 iValue);
        //Get a metadata item of a node as an unsigned integer.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_GetMetadataUint(ref udProjectNode pNode, string pMetadataKey, ref UInt32 pInt, UInt32 defaultValue);
        //Set a metadata item of a node from an unsigned integer.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_SetMetadataUint(ref udProjectNode pNode, string pMetadataKey, UInt32 iValue);
        //Get a metadata item of a node as a 64 bit integer.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_GetMetadataInt64(ref udProjectNode pNode, string pMetadataKey, ref Int64 pInt64, Int64 defaultValue);
        //Set a metadata item of a node from a 64 bit integer.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_SetMetadataInt64(ref udProjectNode pNode, string pMetadataKey, Int64 i64Value);
        //Get a metadata item of a node as a double.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_GetMetadataDouble(ref udProjectNode pNode, string pMetadataKey, ref double pDouble, double defaultValue);
        //Set a metadata item of a node from a double.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_SetMetadataDouble(ref udProjectNode pNode, string pMetadataKey, double doubleValue);
        //Get a metadata item of a node as an boolean.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_GetMetadataBool(ref udProjectNode pNode, string pMetadataKey, ref bool pBool, bool defaultValue);
        //Set a metadata item of a node from an boolean.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_SetMetadataBool(ref udProjectNode pNode, string pMetadataKey, bool boolValue);
        //Get a metadata item of a node as a string.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_GetMetadataString(ref udProjectNode pNode, string pMetadataKey, ref string ppString, string pDefaultValue);
        //Set a metadata item of a node from a string.
        [DllImport(UDSDKLibrary.name)]
        private static extern udError udProjectNode_SetMetadataString(ref udProjectNode pNode, string pMetadataKey, string pString);
        //Get the standard type string name for an itemtype
    }
}