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

namespace OpenNest.Geometry
{
    public class CollisionResult
    {
        public static readonly CollisionResult None = new(
            false,
            new List<Polygon>(),
            new List<Vector>()
        );

        public CollisionResult(
            bool overlaps,
            List<Polygon> overlapRegions,
            List<Vector> intersectionPoints
        )
        {
            Overlaps = overlaps;
            OverlapRegions = overlapRegions;
            IntersectionPoints = intersectionPoints;
            OverlapArea = overlapRegions.Sum(r => r.Area());
        }

        public bool Overlaps { get; }
        public IReadOnlyList<Polygon> OverlapRegions { get; }
        public IReadOnlyList<Vector> IntersectionPoints { get; }
        public double OverlapArea { get; }
    }
}