using System;

using Deltares.Geotechnics;
using Deltares.Geotechnics.Soils;
using Deltares.Geotechnics.SurfaceLines;
using Deltares.Standard;
using Deltares.Standard.Logging;

namespace Deltares.Dam.Data
{
    public class WaterBoardPostProcessRelativeProfilesException : Exception
    {
        public WaterBoardPostProcessRelativeProfilesException(string message)
            : base(message)
        {
        }
    }

    public static class WaterBoardPostProcessRelativeProfiles
    {
        /// <summary>
        /// Creates the absolute profiles based on the original profiles.
        /// The original profiles are considered to be relative to the specified characteristic point
        /// 1) Create a copy of the assigned segment for each location
        /// 2) In the copy the toplevel of the soilprofile will be moved to the z-coordinate of the specified characteristic point
        /// </summary>
        /// <param name="waterBoard">The water board.</param>
        /// <param name="characteristicPointType">The characteristic point to which the soilprofile toplevel should be moved </param>
        public static void CreateAbsoluteProfiles(WaterBoard waterBoard, CharacteristicPointType characteristicPointType)
        {
            foreach (Dike dike in waterBoard.Dikes)
            {
                foreach (Location location in dike.Locations)
                {
                    var orgSegment = location.Segment;
                    if (orgSegment != null)
                    {
                        var newSegment = new Segment();
                        newSegment.Name = String.Format("Segment {0}", location.Name);
                        foreach (SoilGeometryProbability orgSoilGeometryProbability in orgSegment.SoilProfileProbabilities)
                        {
                            try
                            {
                                var characteristicGeometryPoint = location.SurfaceLine2.CharacteristicPoints.GetGeometryPoint(characteristicPointType);
                                if (characteristicGeometryPoint == null)
                                {
                                    throw new WaterBoardPostProcessRelativeProfilesException(String.Format("Characteristic point {0} is not defined", characteristicPointType));
                                }
                                if (orgSoilGeometryProbability.SoilGeometryType.Equals(SoilGeometryType.SoilGeometry2D))
                                {
                                    throw new WaterBoardPostProcessRelativeProfilesException("Cannnot apply releative profiles for 2d soilprofiles");
                                }

                                // Create a copy of the original SoilGeometryProbability
                                SoilGeometryProbability newSoilGeometryProbability = new SoilGeometryProbability();
                                newSoilGeometryProbability.Assign(orgSoilGeometryProbability);

                                // Move all layer boundaries so toplevel of the soilprofile1D will be at level of specified characteristic point
                                // Dependent if deltaZ is positive or negative, the bottomLevel should be adjusted before or after adjusting the layers
                                // This is necessary, because the bottomlevel is adjusted automatically during adjustment of layers
                                var soilProfile1D = newSoilGeometryProbability.SoilProfile;
                                double deltaZ = characteristicGeometryPoint.Z - soilProfile1D.TopLevel;
                                if (deltaZ < 0)
                                {
                                    soilProfile1D.BottomLevel += deltaZ;
                                }
                                foreach (SoilLayer1D soilLayer1D in soilProfile1D.Layers)
                                {
                                    soilLayer1D.TopLevel += deltaZ;
                                }
                                if (deltaZ > 0)
                                {
                                    soilProfile1D.BottomLevel += deltaZ;
                                }

                                // Add new SoilGeometryProbability to new segment and assign new segment to location
                                newSegment.SoilProfileProbabilities.Add(newSoilGeometryProbability);
                                location.Segment = newSegment;
                                waterBoard.Segments.Add(newSegment);
                            }
                            catch (Exception e)
                            {
                                LogManager.Messages.Add(new LogMessage(LogMessageType.Error, location,
                                    String.Format("Error in location '{0}' applying relative height for soilprofile '{1}': {2} ",
                                    location.Name, orgSoilGeometryProbability.SoilGeometryName, e.Message)));
                            }
                        }
                    }
                }
            }

        }
    }
}