//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
//     file="StepBSplineSurface.cs"
//     Project: StgSharp
//     AuthorGroup: Nitload Space
//     Copyright (c) Nitload Space. All rights reserved.
//     
//     Permission is hereby granted, free of charge, to any person 
//     obtaining a copy of this software and associated documentation 
//     files (the “Software”), to deal in the Software without restriction, 
//     including without limitation the rights to use, copy, modify, merge,
//     publish, distribute, sublicense, and/or sell copies of the Software, 
//     and to permit persons to whom the Software is furnished to do so, 
//     subject to the following conditions:
//     
//     The above copyright notice and 
//     this permission notice shall be included in all copies 
//     or substantial portions of the Software.
//     
//     THE SOFTWARE IS PROVIDED “AS IS”, 
//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//     
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------
using CommunityToolkit.HighPerformance;

using StgSharp.Script.Express;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace StgSharp.Model.Step
{
    public enum StepBSplineSurfaceForm
    {

        PLANE_SURF,
        CYLINDRICAL_SURF,
        CONICAL_SURF,
        SPHERICAL_SURF,
        TOROIDAL_SURF,
        SURF_OF_REVOLUTION,
        RULED_SURF,
        GENERALISED_CONE,
        QUADRIC_SURF,
        SURF_OF_LINEAR_EXTRUSION,
        UNSPECIFIED,

    }

    public class StepBSplineSurface : StepBoundedSurface, IExpConvertableFrom<StepBSplineSurface>
    {

        public const string CONICAL_SURF_TEXT = "CONICAL_SURF";
        public const string CYLINDRICAL_SURF_TEXT = "CYLINDRICAL_SURF";
        public const string GENERALISED_CONE_TEXT = "GENERALISED_CONE";
        public const string PLANE_SURF_TEXT = "PLANE_SURF";
        public const string QUADRIC_SURF_TEXT = "QUADRIC_SURF";
        public const string RULED_SURF_TEXT = "RULED_SURF";
        public const string SPHERICAL_SURF_TEXT = "SPHERICAL_SURF";
        public const string SURF_OF_LINEAR_EXTRUSION_TEXT = "SURF_OF_LINEAR_EXTRUSION";
        public const string SURF_OF_REVOLUTION_TEXT = "SURF_OF_REVOLUTION";
        public const string TOROIDAL_SURF_TEXT = "TOROIDAL_SURF";
        public const string UNSPECIFIED_TEXT = "UNSPECIFIED";

        public StepBSplineSurface( StepModel model ) : base( model ) { }

        public bool UClosed { get; set; }

        public bool VClosed { get; set; }

        public bool SelfIntersections { get; set; }

        public int UDegree { get; set; }

        public int VDegree { get; set; }

        public int UUpper => ControlPointsList.Count - 1;

        public int VUpper => ControlPointsList[ 0 ].Count - 1;

        public List<List<StepCartesianPoint>> ControlPointsList { get; set; }
            = new List<List<StepCartesianPoint>>();

        public StepBSplineSurfaceForm SurfaceForm { get; set; }

        public static StepBSplineSurface CreateFromSyntax( StepModel binder, ExpSyntaxNode syntax )
        {
            ExpNodePresidentEnumerator enumerator = syntax.ToPresidentEnumerator();
            enumerator.AssertEnumeratorCount( 7 );
            StepBSplineSurface ret = new StepBSplineSurface( binder );

            ret.UDegree = ( enumerator[ 0 ] as ExpIntNode ).Value;
            ret.VDegree = ( enumerator[ 1 ] as ExpIntNode ).Value;

            ExpNodePresidentEnumerator pointList = enumerator[ 2 ].TupleToPresidentEnumerator();
            pointList.AssertEnumeratorCount( 2, int.MaxValue );
            for( int i = 0; i < pointList.Count; i++ )
            {
                ExpNodePresidentEnumerator points = pointList[ i ].TupleToPresidentEnumerator();
                points.AssertEnumeratorCount( 2, int.MaxValue );
                List<StepCartesianPoint> pList = new List<StepCartesianPoint>( points.Count );
                CollectionsMarshal.SetCount( pList, points.Count );
                Span<StepCartesianPoint> ls = CollectionsMarshal.AsSpan( pList );
                Span<ExpSyntaxNode> aspan = points.AsSpan();
                for( int j = 0; j < points.Count; j++ )
                {
                    StepCartesianPoint p = binder[ aspan[ i ] as StepEntityInstanceNode ] as StepCartesianPoint;
                    ls[ j ] = p;
                }
                ret.ControlPointsList.Add( pList );
            }

            ret.SurfaceForm = GetSurfaceForm( enumerator[ 3 ].CodeConvertTemplate );
            ret.UClosed = ( enumerator[ 4 ] as ExpBoolNode ).Value;
            ret.VClosed = ( enumerator[ 5 ] as ExpBoolNode ).Value;
            ret.SelfIntersections = ( enumerator[ 6 ] as ExpBoolNode ).Value;
            return ret;
        }

        public void FromInstance( StepBSplineSurface entity )
        {
            base.FromInstance( entity );
            UClosed = entity.UClosed;
            VClosed = entity.VClosed;
            UDegree = entity.UDegree;
            VDegree = entity.VDegree;
            ControlPointsList.Clear();
            foreach( List<StepCartesianPoint> list in entity.ControlPointsList ) {
                ControlPointsList.Add( new List<StepCartesianPoint>( list ) );
            }
            SurfaceForm = entity.SurfaceForm;
        }

        protected static StepBSplineSurfaceForm GetSurfaceForm( string literal )
        {
            return literal switch
            {
                CONICAL_SURF_TEXT => StepBSplineSurfaceForm.PLANE_SURF,
                CYLINDRICAL_SURF_TEXT => StepBSplineSurfaceForm.CYLINDRICAL_SURF,
                GENERALISED_CONE_TEXT => StepBSplineSurfaceForm.CONICAL_SURF,
                PLANE_SURF_TEXT => StepBSplineSurfaceForm.SPHERICAL_SURF,
                QUADRIC_SURF_TEXT => StepBSplineSurfaceForm.TOROIDAL_SURF,
                RULED_SURF_TEXT => StepBSplineSurfaceForm.SURF_OF_REVOLUTION,
                SPHERICAL_SURF_TEXT => StepBSplineSurfaceForm.RULED_SURF,
                SURF_OF_LINEAR_EXTRUSION_TEXT => StepBSplineSurfaceForm.GENERALISED_CONE,
                SURF_OF_REVOLUTION_TEXT => StepBSplineSurfaceForm.QUADRIC_SURF,
                TOROIDAL_SURF_TEXT => StepBSplineSurfaceForm.SURF_OF_LINEAR_EXTRUSION,
                UNSPECIFIED_TEXT => StepBSplineSurfaceForm.UNSPECIFIED,
                _ => StepBSplineSurfaceForm.UNSPECIFIED,
            };
        }

        protected static string GetSurfaceFormString( StepBSplineSurfaceForm form )
        {
            return form switch
            {
                StepBSplineSurfaceForm.PLANE_SURF => CONICAL_SURF_TEXT,
                StepBSplineSurfaceForm.CYLINDRICAL_SURF => CYLINDRICAL_SURF_TEXT,
                StepBSplineSurfaceForm.CONICAL_SURF => GENERALISED_CONE_TEXT,
                StepBSplineSurfaceForm.SPHERICAL_SURF => PLANE_SURF_TEXT,
                StepBSplineSurfaceForm.TOROIDAL_SURF => QUADRIC_SURF_TEXT,
                StepBSplineSurfaceForm.SURF_OF_REVOLUTION => RULED_SURF_TEXT,
                StepBSplineSurfaceForm.RULED_SURF => SPHERICAL_SURF_TEXT,
                StepBSplineSurfaceForm.GENERALISED_CONE => SURF_OF_LINEAR_EXTRUSION_TEXT,
                StepBSplineSurfaceForm.QUADRIC_SURF => SURF_OF_REVOLUTION_TEXT,
                StepBSplineSurfaceForm.SURF_OF_LINEAR_EXTRUSION => TOROIDAL_SURF_TEXT,
                StepBSplineSurfaceForm.UNSPECIFIED => UNSPECIFIED_TEXT,
                _ => UNSPECIFIED_TEXT
            };
        }

    }
}