// Copyright (C) Stichting Deltares 2025. All rights reserved.
// 
// This file is part of the Dam Engine.
// 
// The Dam Engine 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 System.Collections.Generic;
using Deltares.DamEngine.Data.Geometry;
using NUnit.Framework;

namespace Deltares.DamEngine.Data.Tests.Geometry;

[TestFixture]
public class LineHelperTests
{
    [Test]
    public void Given2DPointsListWithDuplicatedPoints_WhenRemovingDuplicatedPoints_ThenCorrectListReturned()
    {
        var pointList = new List<Point2D>();

        // The list contains only 2 times coinciding points => expected 3 points
        pointList.Add(new Point2D(2, 3));
        pointList.Add(new Point2D(2, 3));
        pointList.Add(new Point2D(4, 3));
        pointList.Add(new Point2D(2, 3));
        pointList.Add(new Point2D(2, 3));
        pointList.Add(new Point2D(2, 3));
        pointList.Add(new Point2D(1, 2));
        pointList.Add(new Point2D(1, 2));

        LineHelper.RemoveDuplicatedPoints(pointList, 1e-12);

        Assert.That(pointList, Has.Count.EqualTo(4));
        Assert.Multiple(() =>
        {
            Assert.That(pointList[0].X, Is.EqualTo(2));
            Assert.That(pointList[0].Z, Is.EqualTo(3));
            Assert.That(pointList[1].X, Is.EqualTo(4));
            Assert.That(pointList[1].Z, Is.EqualTo(3));
            Assert.That(pointList[2].X, Is.EqualTo(2));
            Assert.That(pointList[2].Z, Is.EqualTo(3));
            Assert.That(pointList[3].X, Is.EqualTo(1));
            Assert.That(pointList[3].Z, Is.EqualTo(2));
        });
    }
}