using CaeGlobals;
using System;
using System.Collections.Generic;
using System.Linq;

namespace CaeMesh
{
    [Serializable]
    public class FeNodeSet : FeGroup
    {
        // Variables                                                                                                                
        private Selection _creationData;
        private int[] _creationIds;
        private double[] _centerOfGravity;
        private double[][] _boundingBox;


        // Properties                                                                                                               
        public Selection CreationData 
        { 
            get => _creationData;
            set => _creationData = value;
        }
        public int[] CreationIds
        {
            get => _creationIds;
            set => _creationIds = value;
        }
        public double[] CenterOfGravity 
        { 
            get => _centerOfGravity;
            set => _centerOfGravity = value;
        }
        public double[][] BoundingBox 
        {
            get => _boundingBox;
            set => _boundingBox = value;
        }

        // Constructors                                                                                                             
        public FeNodeSet(string name, int[] labels) 
            : base(name, labels)
        {
            _creationData = null;
            _creationIds = null;
            _centerOfGravity = null;
            _boundingBox = null;
        }
        public FeNodeSet(string name, int[] labels, double[] centerOfGravity)
            : base(name, labels)
        {
            _creationData = null;
            _creationIds = null;
            _centerOfGravity = centerOfGravity;
            _boundingBox = null;
        }


        // Methods                                                                                                                  
        public int[] GetMaxNRandomNodeIds(int n)
        {
            if (Labels.Length < n) return Labels;
            else
            {
                List<int> notSelectedNodes = new List<int>(Labels);
                int[] selectedNodes = new int[n];
                Random rand = new Random();
                int id;
                for (int i = 0; i < n; i++)
                {
                    id = rand.Next(0, notSelectedNodes.Count - 1);
                    selectedNodes[i] = notSelectedNodes[id];
                    notSelectedNodes.RemoveAt(id);
                }
                return selectedNodes.ToArray();
            }
        }
    }
}