// Copyright (C) Stichting Deltares 2020. All rights reserved.
//
// This file is part of the Layer On Slope Tool.
//
// The Layer On Slope Tool is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// All names, logos, and references to "Deltares" are registered trademarks of
// Stichting Deltares and remain full property of Stichting Deltares at all times.
// All rights reserved.

using Deltares.LayerOnSlopeTool.Data;
using NUnit.Framework;

namespace Deltares.LayerOnSlopeTool.LayerCreator.Tests
{
    [TestFixture]
    public class SurfaceLineProcessorTests
    {
        private const double Tolerance = 0.001;

        [Test]
        public void TestDetermineLoweredSurfaceLineForGivenLayerThickness()
        {
            var originalSurfaceLine = CreateSimpleStraightSurfaceLine();
            var surfacelineProcessor = new SurfaceLineProcessor(originalSurfaceLine);
            var loweredSurfaceLine = surfacelineProcessor.CreateLoweredSurfaceLine(1);
            Assert.AreEqual(11, loweredSurfaceLine.SurfaceLinePoints.Count);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[0].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[0].ZCoordinate, Tolerance);
            Assert.AreEqual(5, loweredSurfaceLine.SurfaceLinePoints[1].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[1].ZCoordinate, Tolerance);
            Assert.AreEqual(10, loweredSurfaceLine.SurfaceLinePoints[2].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[2].ZCoordinate, Tolerance);
            Assert.AreEqual(12, loweredSurfaceLine.SurfaceLinePoints[3].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[3].ZCoordinate, Tolerance);
            Assert.AreEqual(14, loweredSurfaceLine.SurfaceLinePoints[4].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[4].ZCoordinate, Tolerance);
            Assert.AreEqual(14.01, loweredSurfaceLine.SurfaceLinePoints[5].XCoordinate, Tolerance);
            Assert.AreEqual(-1, loweredSurfaceLine.SurfaceLinePoints[5].ZCoordinate, Tolerance);
            Assert.AreEqual(15, loweredSurfaceLine.SurfaceLinePoints[6].XCoordinate, Tolerance);
            Assert.AreEqual(-1, loweredSurfaceLine.SurfaceLinePoints[6].ZCoordinate, Tolerance);
            Assert.AreEqual(15.99, loweredSurfaceLine.SurfaceLinePoints[7].XCoordinate, Tolerance);
            Assert.AreEqual(-1, loweredSurfaceLine.SurfaceLinePoints[7].ZCoordinate, Tolerance);
            Assert.AreEqual(16, loweredSurfaceLine.SurfaceLinePoints[8].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[8].ZCoordinate, Tolerance);
            Assert.AreEqual(22, loweredSurfaceLine.SurfaceLinePoints[9].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[9].ZCoordinate, Tolerance);
            Assert.AreEqual(30, loweredSurfaceLine.SurfaceLinePoints[10].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[10].ZCoordinate, Tolerance);

        }

        [Test]
        public void TestDetermineLoweredSurfaceLineForGivenLayerThicknessWithAckwardPoints()
        {
            var originalSurfaceLine = CreateSimpleStraightSurfaceLineWithAckwardPoints();
            var surfacelineProcessor = new SurfaceLineProcessor(originalSurfaceLine);
            var loweredSurfaceLine = surfacelineProcessor.CreateLoweredSurfaceLine(1);
            Assert.AreEqual(11, loweredSurfaceLine.SurfaceLinePoints.Count);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[0].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[0].ZCoordinate, Tolerance);
            Assert.AreEqual(5, loweredSurfaceLine.SurfaceLinePoints[1].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[1].ZCoordinate, Tolerance);
            Assert.AreEqual(10, loweredSurfaceLine.SurfaceLinePoints[2].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[2].ZCoordinate, Tolerance);
            Assert.AreEqual(12, loweredSurfaceLine.SurfaceLinePoints[3].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[3].ZCoordinate, Tolerance);
            Assert.AreEqual(14, loweredSurfaceLine.SurfaceLinePoints[4].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[4].ZCoordinate, Tolerance);
            Assert.AreEqual(14.01, loweredSurfaceLine.SurfaceLinePoints[5].XCoordinate, Tolerance);
            Assert.AreEqual(-1, loweredSurfaceLine.SurfaceLinePoints[5].ZCoordinate, Tolerance);
            Assert.AreEqual(15.5, loweredSurfaceLine.SurfaceLinePoints[6].XCoordinate, Tolerance);
            Assert.AreEqual(-1, loweredSurfaceLine.SurfaceLinePoints[6].ZCoordinate, Tolerance);
            Assert.AreEqual(15.99, loweredSurfaceLine.SurfaceLinePoints[7].XCoordinate, Tolerance);
            Assert.AreEqual(-1, loweredSurfaceLine.SurfaceLinePoints[7].ZCoordinate, Tolerance);
            Assert.AreEqual(16, loweredSurfaceLine.SurfaceLinePoints[8].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[8].ZCoordinate, Tolerance);
            Assert.AreEqual(22, loweredSurfaceLine.SurfaceLinePoints[9].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[9].ZCoordinate, Tolerance);
            Assert.AreEqual(30, loweredSurfaceLine.SurfaceLinePoints[10].XCoordinate, Tolerance);
            Assert.AreEqual(0, loweredSurfaceLine.SurfaceLinePoints[10].ZCoordinate, Tolerance);

        }

        private SurfaceLine CreateSimpleStraightSurfaceLine()
        {
            var surfaceLine = new SurfaceLine();
            surfaceLine.SurfaceLineId = "SimpleStraightSurfaceLine";
            var point = new SurfaceLinePoint
            {
                XCoordinate = 0,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.SurfaceLevelOutside
            };
            surfaceLine.SurfaceLinePoints.Add(point);
            var pointA = new SurfaceLinePoint
            {
                XCoordinate = 5,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.None
            };
            surfaceLine.SurfaceLinePoints.Add(pointA);
            var point1 = new SurfaceLinePoint
            {
                XCoordinate = 10,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.DikeToeAtRiver
            };
            surfaceLine.SurfaceLinePoints.Add(point1);
            var point2 = new SurfaceLinePoint
            {
                XCoordinate = 12,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.DikeTopAtRiver
            };
            surfaceLine.SurfaceLinePoints.Add(point2);
            var point3 = new SurfaceLinePoint
            {
                XCoordinate = 14,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.DikeTopAtPolder
            };
            surfaceLine.SurfaceLinePoints.Add(point3);
            var point3A = new SurfaceLinePoint
            {
                XCoordinate = 15,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.None
            };
            surfaceLine.SurfaceLinePoints.Add(point3A);
            var point4 = new SurfaceLinePoint
            {
                XCoordinate = 16,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.DikeToeAtPolder
            };
            surfaceLine.SurfaceLinePoints.Add(point4);
            var point4A = new SurfaceLinePoint
            {
                XCoordinate = 22,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.None
            };
            surfaceLine.SurfaceLinePoints.Add(point4A);
            var point5 = new SurfaceLinePoint
            {
                XCoordinate = 30,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.SurfaceLevelInside
            };
            surfaceLine.SurfaceLinePoints.Add(point5);
            return surfaceLine;
        }

        private SurfaceLine CreateSimpleStraightSurfaceLineWithAckwardPoints()
        {
            var surfaceLine = new SurfaceLine();
            surfaceLine.SurfaceLineId = "SimpleStraightSurfaceLine";
            var point = new SurfaceLinePoint
            {
                XCoordinate = 0,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.SurfaceLevelOutside
            };
            surfaceLine.SurfaceLinePoints.Add(point);
            var pointA = new SurfaceLinePoint
            {
                XCoordinate = 5,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.None
            };
            surfaceLine.SurfaceLinePoints.Add(pointA);
            var point1 = new SurfaceLinePoint
            {
                XCoordinate = 10,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.DikeToeAtRiver
            };
            surfaceLine.SurfaceLinePoints.Add(point1);
            var point2 = new SurfaceLinePoint
            {
                XCoordinate = 12,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.DikeTopAtRiver
            };
            surfaceLine.SurfaceLinePoints.Add(point2);
            var point3 = new SurfaceLinePoint
            {
                XCoordinate = 14,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.DikeTopAtPolder
            };
            surfaceLine.SurfaceLinePoints.Add(point3);
            var point3A = new SurfaceLinePoint
            {
                // is less than 0.01 meter beyond the point that is to be lowered with offset of 0.01 m. So this point should NOT be found in the lowered line
                XCoordinate = 14.001,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.None
            };
            surfaceLine.SurfaceLinePoints.Add(point3A);
            var point3B = new SurfaceLinePoint
            {
                // make this 15.5 instead of 15 to be different from ordinary SimpleStraightSurfaceLine.
                XCoordinate = 15.5,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.None
            };
            surfaceLine.SurfaceLinePoints.Add(point3B);
            var point3C = new SurfaceLinePoint
            {
                // is less than 0.01 meter in front off the point that is to be lowered with offset of -0.01 m. So this point should NOT be found in the lowered line
                XCoordinate = 15.999,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.None
            };
            surfaceLine.SurfaceLinePoints.Add(point3C);
            var point4 = new SurfaceLinePoint
            {
                XCoordinate = 16,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.DikeToeAtPolder
            };
            surfaceLine.SurfaceLinePoints.Add(point4);
            var point4A = new SurfaceLinePoint
            {
                XCoordinate = 22,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.None
            };
            surfaceLine.SurfaceLinePoints.Add(point4A);
            var point5 = new SurfaceLinePoint
            {
                XCoordinate = 30,
                ZCoordinate = 0,
                PointType = CharacteristicPointType.SurfaceLevelInside
            };
            surfaceLine.SurfaceLinePoints.Add(point5);
            return surfaceLine;
        }
    }
}