using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Deltares.DamEngine.Data.Geotechnics
{
    public class SoilProfileHelper
    {
        public static SoilProfile1D DetermineForSurfaceLineCorrected1DProfileAtX(SoilProfile1D originalSoilProfile1D,
            SurfaceLine2 surfaceLine, double xCoordinate, Soil dikeEmbankmentMaterial)
        {
            var soilProfile = new SoilProfile1D();
            soilProfile.Assign(originalSoilProfile1D);
            var top = surfaceLine.Geometry.GetZatX(xCoordinate);
            if (soilProfile.TopLevel < top)
            {
                var topLayer = new SoilLayer1D
                {
                    TopLevel = top,
                    Soil = dikeEmbankmentMaterial,
                    SoilProfile = soilProfile,
                    BottomLevel = soilProfile.TopLevel
                };
                soilProfile.Layers.Insert(0, topLayer);
            }
            // Todo #Bka: I believe this code should be here to ensure you do not take soil above surface line into account.
            // Todo However, it causes a series of errors in the tests which I do not get. Have to look at that together with Tom
            // else if (soilProfile.TopLevel > top) 
            // {
            //     var bottom = RemoveLayersAboveTop(originalSoilProfile1D.LayerCount, soilProfile, top);
            //     var topLayer = new SoilLayer1D
            //     {
            //         TopLevel = top,
            //         Soil = originalSoilProfile1D.Layers[bottom].Soil,
            //         SoilProfile = soilProfile,
            //         IsAquifer = originalSoilProfile1D.Layers[bottom].IsAquifer,
            //         BottomLevel = originalSoilProfile1D.Layers[bottom].BottomLevel
            //     };
            //     soilProfile.Layers.Insert(0, topLayer);
            // }

            soilProfile.BottomLevel = originalSoilProfile1D.BottomLevel;
            return soilProfile;
        }

        private static int RemoveLayersAboveTop(int layerCount, SoilProfile1D soilProfile, double top)
        {
            var index = layerCount;
            for (int i = layerCount - 1; i >= 0; i--)
            {
                if (soilProfile.Layers[i].TopLevel > top)
                {
                    soilProfile.Layers.RemoveAt(i);
                    if (index == layerCount)
                    {
                        index = i;
                    }
                }
            }

            return index; //soilProfile.Layers[0].TopLevel;
        }
    }
}