using Deltares.Geometry;
using NUnit.Framework;

namespace Deltares.Geotechnics.WaternetCreator.Tests
{
    [TestFixture]
    public class LineHelperTests
    {
        [Test]
        public void GetIntersectPointTest()
        {
            var line1 = new Line();
            line1.BeginPoint = new GeometryPoint(0.0, 0, 0.0);
            line1.EndPoint = new GeometryPoint(10.0, 0, 0.0);
            var line2 = new Line();
            line2.BeginPoint = new GeometryPoint(0.0, 0, -5.0);
            line2.EndPoint = new GeometryPoint(10.0, 0, 5.0);
            GeometryPoint isp = LineHelper.GetIntersectPoint(line1, line2, PointType.XZ);
            Assert.AreEqual(5.0, isp.X);
            Assert.AreEqual(0.0, isp.Z);
        }

        [Test]
        public void GetIntersectPointTestInvalidInputReturnsNaN()
        {
            var line1 = new Line();
            line1.BeginPoint = new GeometryPoint();
            line1.EndPoint = new GeometryPoint();
            var line2 = new Line();
            line2.BeginPoint = new GeometryPoint(0.0, 0, 0.0);
            line2.EndPoint = new GeometryPoint(10.0, 0, 5.0);
            GeometryPoint isp = LineHelper.GetIntersectPoint(line1, line2, PointType.XZ);
            Assert.AreEqual(double.NaN, isp.X);
            Assert.AreEqual(double.NaN, isp.Z);
        }

        [Test]
        public void GetIntersectPointTestReturnsBeginPoint()
        {
            var line1 = new Line();
            line1.BeginPoint = new GeometryPoint(0.0, 0, 0.0);
            line1.EndPoint = new GeometryPoint(10.0, 0, 0.0);
            var line2 = new Line();
            line2.BeginPoint = new GeometryPoint(0.0, 0, 0.0);
            line2.EndPoint = new GeometryPoint(10.0, 0, 5.0);
            GeometryPoint isp = LineHelper.GetIntersectPoint(line1, line2, PointType.XZ);
            Assert.AreEqual(0.0, isp.X);
            Assert.AreEqual(0.0, isp.Z);
        }

        [Test]
        public void GetIntersectPointTestReturnsNaN()
        {
            var line1 = new Line();
            line1.BeginPoint = new GeometryPoint(0.0, 0, 0.0);
            line1.EndPoint = new GeometryPoint(10.0, 0, 0.0);
            var line2 = new Line();
            line2.BeginPoint = new GeometryPoint(0.0, 0, -5.0);
            line2.EndPoint = new GeometryPoint(10.0, 0, -5.0);
            GeometryPoint isp = LineHelper.GetIntersectPoint(line1, line2, PointType.XZ);
            Assert.AreEqual(double.NaN, isp.X);
            Assert.AreEqual(double.NaN, isp.Z);
        }
    }
}