// Copyright (C) Stichting Deltares 2016. All rights reserved.
//
// This file is part of Ringtoets.
//
// Ringtoets is free software: you can redistribute it and/or modify
// it under the terms of the GNU 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 General Public License for more details.
//
// You should have received a copy of the GNU 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;
using System.Collections.Generic;
using System.Linq;
using Core.Common.Base;
using Ringtoets.ClosingStructures.Data;
using Ringtoets.ClosingStructures.Service;
using Ringtoets.Common.Data.AssessmentSection;
using Ringtoets.Common.Data.DikeProfiles;
using Ringtoets.Common.Data.FailureMechanism;
using Ringtoets.Common.Data.Hydraulics;
using Ringtoets.Common.Data.Structures;
using Ringtoets.Common.Service;
using Ringtoets.GrassCoverErosionInwards.Data;
using Ringtoets.GrassCoverErosionInwards.Service;
using Ringtoets.GrassCoverErosionInwards.Utils;
using Ringtoets.GrassCoverErosionOutwards.Data;
using Ringtoets.GrassCoverErosionOutwards.Service;
using Ringtoets.HeightStructures.Data;
using Ringtoets.HeightStructures.Service;
using Ringtoets.Piping.Data;
using Ringtoets.Piping.Service;
using Ringtoets.Revetment.Data;
using Ringtoets.StabilityPointStructures.Data;
using Ringtoets.StabilityPointStructures.Service;
using Ringtoets.StabilityStoneCover.Data;
using Ringtoets.StabilityStoneCover.Service;
using Ringtoets.WaveImpactAsphaltCover.Data;
using Ringtoets.WaveImpactAsphaltCover.Service;

namespace Ringtoets.Integration.Service
{
    /// <summary>
    /// Service for synchronizing ringtoets.
    /// </summary>
    public static class RingtoetsDataSynchronizationService
    {
        /// <summary>
        /// Clears all the output data and hydraulic boundary locations within the <see cref="IAssessmentSection"/>.
        /// </summary>
        /// <param name="assessmentSection">The <see cref="IAssessmentSection"/> to clear the data for.</param>
        /// <returns>An <see cref="IEnumerable{T}"/> of calculations which are affected by
        /// removing data.</returns>
        /// /// <exception cref="ArgumentNullException">Thrown when <paramref name="assessmentSection"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> ClearAllCalculationOutputAndHydraulicBoundaryLocations(IAssessmentSection assessmentSection)
        {
            if (assessmentSection == null)
            {
                throw new ArgumentNullException("assessmentSection");
            }

            var affectedItems = new List<IObservable>();

            foreach (var failureMechanism in assessmentSection.GetFailureMechanisms())
            {
                var pipingFailureMechanism = failureMechanism as PipingFailureMechanism;
                var grassCoverErosionInwardsFailureMechanism = failureMechanism as GrassCoverErosionInwardsFailureMechanism;
                var stabilityStoneCoverFailureMechanism = failureMechanism as StabilityStoneCoverFailureMechanism;
                var heightStructuresFailureMechanism = failureMechanism as HeightStructuresFailureMechanism;
                var closingStructuresFailureMechanism = failureMechanism as ClosingStructuresFailureMechanism;
                var stabilityPointStructuresFailureMechanism = failureMechanism as StabilityPointStructuresFailureMechanism;
                var grassCoverErosionOutwardsFailureMechanism = failureMechanism as GrassCoverErosionOutwardsFailureMechanism;
                var waveImpactAsphaltCoverFailureMechanism = failureMechanism as WaveImpactAsphaltCoverFailureMechanism;

                if (pipingFailureMechanism != null)
                {
                    affectedItems.AddRange(PipingDataSynchronizationService.ClearAllCalculationOutputAndHydraulicBoundaryLocations(pipingFailureMechanism));
                }
                if (grassCoverErosionInwardsFailureMechanism != null)
                {
                    affectedItems.AddRange(GrassCoverErosionInwardsDataSynchronizationService.ClearAllCalculationOutputAndHydraulicBoundaryLocations(grassCoverErosionInwardsFailureMechanism));
                }
                if (stabilityStoneCoverFailureMechanism != null)
                {
                    affectedItems.AddRange(StabilityStoneCoverDataSynchronizationService.ClearAllWaveConditionsCalculationOutputAndHydraulicBoundaryLocations(stabilityStoneCoverFailureMechanism));
                }
                if (waveImpactAsphaltCoverFailureMechanism != null)
                {
                    affectedItems.AddRange(WaveImpactAsphaltCoverDataSynchronizationService.ClearAllWaveConditionsCalculationOutputAndHydraulicBoundaryLocations(waveImpactAsphaltCoverFailureMechanism));
                }
                if (grassCoverErosionOutwardsFailureMechanism != null)
                {
                    affectedItems.AddRange(GrassCoverErosionOutwardsDataSynchronizationService.ClearAllWaveConditionsCalculationOutputAndHydraulicBoundaryLocations(grassCoverErosionOutwardsFailureMechanism));
                }
                if (heightStructuresFailureMechanism != null)
                {
                    affectedItems.AddRange(HeightStructuresDataSynchronizationService.ClearAllCalculationOutputAndHydraulicBoundaryLocations(heightStructuresFailureMechanism));
                }
                if (closingStructuresFailureMechanism != null)
                {
                    affectedItems.AddRange(ClosingStructuresDataSynchronizationService.ClearAllCalculationOutputAndHydraulicBoundaryLocations(closingStructuresFailureMechanism));
                }
                if (stabilityPointStructuresFailureMechanism != null)
                {
                    affectedItems.AddRange(StabilityPointStructuresDataSynchronizationService.ClearAllCalculationOutputAndHydraulicBoundaryLocations(stabilityPointStructuresFailureMechanism));
                }
            }

            return affectedItems;
        }

        /// <summary>
        /// Clears the output of all calculations in the <see cref="IAssessmentSection"/>.
        /// </summary>
        /// <param name="assessmentSection">The <see cref="IAssessmentSection"/> which contains the calculations.</param>
        /// <returns>An <see cref="IEnumerable{T}"/> of calculations which are affected by clearing the output.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="assessmentSection"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> ClearFailureMechanismCalculationOutputs(IAssessmentSection assessmentSection)
        {
            if (assessmentSection == null)
            {
                throw new ArgumentNullException("assessmentSection");
            }

            var affectedItems = new List<IObservable>();

            foreach (var failureMechanism in assessmentSection.GetFailureMechanisms())
            {
                var pipingFailureMechanism = failureMechanism as PipingFailureMechanism;
                var grassCoverErosionInwardsFailureMechanism = failureMechanism as GrassCoverErosionInwardsFailureMechanism;
                var stabilityStoneCoverFailureMechanism = failureMechanism as StabilityStoneCoverFailureMechanism;
                var heightStructuresFailureMechanism = failureMechanism as HeightStructuresFailureMechanism;
                var closingStructuresFailureMechanism = failureMechanism as ClosingStructuresFailureMechanism;
                var stabilityPointStructuresFailureMechanism = failureMechanism as StabilityPointStructuresFailureMechanism;
                var grassCoverErosionOutwardsFailureMechanism = failureMechanism as GrassCoverErosionOutwardsFailureMechanism;
                var waveImpactAsphaltCoverFailureMechanism = failureMechanism as WaveImpactAsphaltCoverFailureMechanism;

                if (pipingFailureMechanism != null)
                {
                    affectedItems.AddRange(PipingDataSynchronizationService.ClearAllCalculationOutput(pipingFailureMechanism));
                }
                if (grassCoverErosionInwardsFailureMechanism != null)
                {
                    affectedItems.AddRange(GrassCoverErosionInwardsDataSynchronizationService.ClearAllCalculationOutput(grassCoverErosionInwardsFailureMechanism));
                }
                if (stabilityStoneCoverFailureMechanism != null)
                {
                    affectedItems.AddRange(StabilityStoneCoverDataSynchronizationService.ClearAllWaveConditionsCalculationOutput(stabilityStoneCoverFailureMechanism));
                }
                if (waveImpactAsphaltCoverFailureMechanism != null)
                {
                    affectedItems.AddRange(WaveImpactAsphaltCoverDataSynchronizationService.ClearAllWaveConditionsCalculationOutput(waveImpactAsphaltCoverFailureMechanism));
                }
                if (grassCoverErosionOutwardsFailureMechanism != null)
                {
                    affectedItems.AddRange(GrassCoverErosionOutwardsDataSynchronizationService.ClearAllWaveConditionsCalculationOutput(grassCoverErosionOutwardsFailureMechanism));
                }
                if (heightStructuresFailureMechanism != null)
                {
                    affectedItems.AddRange(HeightStructuresDataSynchronizationService.ClearAllCalculationOutput(heightStructuresFailureMechanism));
                }
                if (closingStructuresFailureMechanism != null)
                {
                    affectedItems.AddRange(ClosingStructuresDataSynchronizationService.ClearAllCalculationOutput(closingStructuresFailureMechanism));
                }
                if (stabilityPointStructuresFailureMechanism != null)
                {
                    affectedItems.AddRange(StabilityPointStructuresDataSynchronizationService.ClearAllCalculationOutput(stabilityPointStructuresFailureMechanism));
                }
            }

            return affectedItems;
        }

        /// <summary>
        /// Clears the output of the hydraulic boundary locations within the <paramref name="hydraulicBoundaryDatabase"/>
        /// and <paramref name="failureMechanism"/>.
        /// </summary>
        /// <param name="hydraulicBoundaryDatabase">The <see cref="HydraulicBoundaryDatabase"/> wich contains the locations.</param>
        /// <param name="failureMechanism">The <see cref="GrassCoverErosionOutwardsFailureMechanism"/> which contains the locations.</param>
        /// <returns>All objects affected by the operation.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="hydraulicBoundaryDatabase"/> 
        /// or <paramref name="failureMechanism"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> ClearHydraulicBoundaryLocationOutput(HydraulicBoundaryDatabase hydraulicBoundaryDatabase,
                                                                                    GrassCoverErosionOutwardsFailureMechanism failureMechanism)
        {
            if (hydraulicBoundaryDatabase == null)
            {
                throw new ArgumentNullException("hydraulicBoundaryDatabase");
            }
            if (failureMechanism == null)
            {
                throw new ArgumentNullException("failureMechanism");
            }

            return RingtoetsCommonDataSynchronizationService.ClearHydraulicBoundaryLocationOutput(failureMechanism.HydraulicBoundaryLocations)
                                                            .Concat(RingtoetsCommonDataSynchronizationService.ClearHydraulicBoundaryLocationOutput(
                                                                hydraulicBoundaryDatabase.Locations))
                                                            .ToArray();
        }

        /// <summary>
        /// Clears the reference line and all data that depends on it, either directly or indirectly.
        /// </summary>
        /// <param name="assessmentSection">The assessment section.</param>
        /// <returns>All observable objects affected by this method.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="assessmentSection"/>
        /// is <c>null</c>.</exception>
        public static IEnumerable<IObservable> ClearReferenceLine(IAssessmentSection assessmentSection)
        {
            if (assessmentSection == null)
            {
                throw new ArgumentNullException("assessmentSection");
            }

            var list = new List<IObservable>();

            foreach (IFailureMechanism failureMechanism in assessmentSection.GetFailureMechanisms())
            {
                var pipingFailureMechanism = failureMechanism as PipingFailureMechanism;
                var grassCoverErosionInwardsFailureMechanism = failureMechanism as GrassCoverErosionInwardsFailureMechanism;
                var stabilityStoneCoverFailureMechanism = failureMechanism as StabilityStoneCoverFailureMechanism;
                var heightStructuresFailureMechanism = failureMechanism as HeightStructuresFailureMechanism;
                var closingStructuresFailureMechanism = failureMechanism as ClosingStructuresFailureMechanism;
                var stabilityPointStructuresFailureMechanism = failureMechanism as StabilityPointStructuresFailureMechanism;
                var grassCoverErosionOutwardsFailureMechanism = failureMechanism as GrassCoverErosionOutwardsFailureMechanism;
                var waveImpactAsphaltCoverFailureMechanism = failureMechanism as WaveImpactAsphaltCoverFailureMechanism;

                if (pipingFailureMechanism != null)
                {
                    list.AddRange(PipingDataSynchronizationService.ClearReferenceLineDependentData(pipingFailureMechanism));
                }
                else if (grassCoverErosionInwardsFailureMechanism != null)
                {
                    list.AddRange(GrassCoverErosionInwardsDataSynchronizationService.ClearReferenceLineDependentData(grassCoverErosionInwardsFailureMechanism));
                }
                else if (stabilityStoneCoverFailureMechanism != null)
                {
                    list.AddRange(StabilityStoneCoverDataSynchronizationService.ClearReferenceLineDependentData(stabilityStoneCoverFailureMechanism));
                }
                else if (waveImpactAsphaltCoverFailureMechanism != null)
                {
                    list.AddRange(WaveImpactAsphaltCoverDataSynchronizationService.ClearReferenceLineDependentData(waveImpactAsphaltCoverFailureMechanism));
                }
                else if (grassCoverErosionOutwardsFailureMechanism != null)
                {
                    list.AddRange(GrassCoverErosionOutwardsDataSynchronizationService.ClearReferenceLineDependentData(grassCoverErosionOutwardsFailureMechanism));
                }
                else if (heightStructuresFailureMechanism != null)
                {
                    list.AddRange(HeightStructuresDataSynchronizationService.ClearReferenceLineDependentData(heightStructuresFailureMechanism));
                }
                else if (closingStructuresFailureMechanism != null)
                {
                    list.AddRange(ClosingStructuresDataSynchronizationService.ClearReferenceLineDependentData(closingStructuresFailureMechanism));
                }
                else if (stabilityPointStructuresFailureMechanism != null)
                {
                    list.AddRange(StabilityPointStructuresDataSynchronizationService.ClearReferenceLineDependentData(stabilityPointStructuresFailureMechanism));
                }
                else
                {
                    list.AddRange(ClearReferenceLineDependentData(failureMechanism));
                }
            }

            assessmentSection.ReferenceLine = null;
            list.Add(assessmentSection);

            return list;
        }

        /// <summary>
        /// Removes a given <see cref="ForeshoreProfile"/> from the <see cref="HeightStructuresFailureMechanism"/>
        /// and clears all data that depends on it, either directly or indirectly.
        /// </summary>
        /// <param name="failureMechanism">The failure mechanism containing <paramref name="profile"/>.</param>
        /// <param name="profile">The profile residing in <paramref name="failureMechanism"/>
        /// that should be removed.</param>
        /// <returns>All observable objects affected by this method.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="failureMechanism"/>
        /// or <paramref name="profile"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> RemoveForeshoreProfile(HeightStructuresFailureMechanism failureMechanism, ForeshoreProfile profile)
        {
            if (failureMechanism == null)
            {
                throw new ArgumentNullException("failureMechanism");
            }
            if (profile == null)
            {
                throw new ArgumentNullException("profile");
            }

            var changedObservables = new List<IObservable>();
            IEnumerable<StructuresCalculation<HeightStructuresInput>> calculations = failureMechanism.Calculations.Cast<StructuresCalculation<HeightStructuresInput>>();
            changedObservables.AddRange(RingtoetsCommonDataSynchronizationService.ClearForeshoreProfile<HeightStructuresInput, HeightStructure>(calculations, profile));

            failureMechanism.ForeshoreProfiles.Remove(profile);
            changedObservables.Add(failureMechanism.ForeshoreProfiles);

            return changedObservables;
        }

        /// <summary>
        /// Removes a given <see cref="ForeshoreProfile"/> from the <see cref="ClosingStructuresFailureMechanism"/>
        /// and clears all data that depends on it, either directly or indirectly.
        /// </summary>
        /// <param name="failureMechanism">The failure mechanism containing <paramref name="profile"/>.</param>
        /// <param name="profile">The profile residing in <paramref name="failureMechanism"/>
        /// that should be removed.</param>
        /// <returns>All observable objects affected by this method.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="failureMechanism"/>
        /// or <paramref name="profile"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> RemoveForeshoreProfile(ClosingStructuresFailureMechanism failureMechanism, ForeshoreProfile profile)
        {
            if (failureMechanism == null)
            {
                throw new ArgumentNullException("failureMechanism");
            }
            if (profile == null)
            {
                throw new ArgumentNullException("profile");
            }

            var changedObservables = new List<IObservable>();
            IEnumerable<StructuresCalculation<ClosingStructuresInput>> calculations = failureMechanism.Calculations.Cast<StructuresCalculation<ClosingStructuresInput>>();
            changedObservables.AddRange(RingtoetsCommonDataSynchronizationService.ClearForeshoreProfile<ClosingStructuresInput, ClosingStructure>(calculations, profile));

            failureMechanism.ForeshoreProfiles.Remove(profile);
            changedObservables.Add(failureMechanism.ForeshoreProfiles);

            return changedObservables;
        }

        /// <summary>
        /// Removes a given <see cref="ForeshoreProfile"/> from the <see cref="StabilityPointStructuresFailureMechanism"/>
        /// and clears all data that depends on it, either directly or indirectly.
        /// </summary>
        /// <param name="failureMechanism">The failure mechanism containing <paramref name="profile"/>.</param>
        /// <param name="profile">The profile residing in <paramref name="failureMechanism"/>
        /// that should be removed.</param>
        /// <returns>All observable objects affected by this method.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="failureMechanism"/>
        /// or <paramref name="profile"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> RemoveForeshoreProfile(StabilityPointStructuresFailureMechanism failureMechanism, ForeshoreProfile profile)
        {
            if (failureMechanism == null)
            {
                throw new ArgumentNullException("failureMechanism");
            }
            if (profile == null)
            {
                throw new ArgumentNullException("profile");
            }

            var changedObservables = new List<IObservable>();
            IEnumerable<StructuresCalculation<StabilityPointStructuresInput>> calculations = failureMechanism.Calculations.Cast<StructuresCalculation<StabilityPointStructuresInput>>();
            changedObservables.AddRange(RingtoetsCommonDataSynchronizationService.ClearForeshoreProfile<StabilityPointStructuresInput, StabilityPointStructure>(calculations, profile));

            failureMechanism.ForeshoreProfiles.Remove(profile);
            changedObservables.Add(failureMechanism.ForeshoreProfiles);

            return changedObservables;
        }

        /// <summary>
        /// Removes a given <see cref="ForeshoreProfile"/> from the <see cref="StabilityStoneCoverFailureMechanism"/>
        /// and clears all data that depends on it, either directly or indirectly.
        /// </summary>
        /// <param name="failureMechanism">The failure mechanism containing <paramref name="profile"/>.</param>
        /// <param name="profile">The profile residing in <paramref name="failureMechanism"/>
        /// that should be removed.</param>
        /// <returns>All observable objects affected by this method.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="failureMechanism"/>
        /// or <paramref name="profile"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> RemoveForeshoreProfile(StabilityStoneCoverFailureMechanism failureMechanism, ForeshoreProfile profile)
        {
            if (failureMechanism == null)
            {
                throw new ArgumentNullException("failureMechanism");
            }
            if (profile == null)
            {
                throw new ArgumentNullException("profile");
            }

            var changedObservables = new List<IObservable>();
            WaveConditionsInput[] calculationInputs = failureMechanism.Calculations
                                                                      .Cast<StabilityStoneCoverWaveConditionsCalculation>()
                                                                      .Select(c => c.InputParameters)
                                                                      .ToArray();
            changedObservables.AddRange(OnWaveConditionsInputForeshoreProfileRemoved(profile, calculationInputs));

            failureMechanism.ForeshoreProfiles.Remove(profile);
            changedObservables.Add(failureMechanism.ForeshoreProfiles);

            return changedObservables;
        }

        /// <summary>
        /// Removes a given <see cref="ForeshoreProfile"/> from the <see cref="WaveImpactAsphaltCoverFailureMechanism"/>
        /// and clears all data that depends on it, either directly or indirectly.
        /// </summary>
        /// <param name="failureMechanism">The failure mechanism containing <paramref name="profile"/>.</param>
        /// <param name="profile">The profile residing in <paramref name="failureMechanism"/>
        /// that should be removed.</param>
        /// <returns>All observable objects affected by this method.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="failureMechanism"/>
        /// or <paramref name="profile"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> RemoveForeshoreProfile(WaveImpactAsphaltCoverFailureMechanism failureMechanism, ForeshoreProfile profile)
        {
            if (failureMechanism == null)
            {
                throw new ArgumentNullException("failureMechanism");
            }
            if (profile == null)
            {
                throw new ArgumentNullException("profile");
            }

            var changedObservables = new List<IObservable>();
            WaveConditionsInput[] calculationInputs = failureMechanism.Calculations
                                                                      .Cast<WaveImpactAsphaltCoverWaveConditionsCalculation>()
                                                                      .Select(c => c.InputParameters)
                                                                      .ToArray();
            changedObservables.AddRange(OnWaveConditionsInputForeshoreProfileRemoved(profile, calculationInputs));

            failureMechanism.ForeshoreProfiles.Remove(profile);
            changedObservables.Add(failureMechanism.ForeshoreProfiles);

            return changedObservables;
        }

        /// <summary>
        /// Removes a given <see cref="ForeshoreProfile"/> from the <see cref="GrassCoverErosionOutwardsFailureMechanism"/>
        /// and clears all data that depends on it, either directly or indirectly.
        /// </summary>
        /// <param name="failureMechanism">The failure mechanism containing <paramref name="profile"/>.</param>
        /// <param name="profile">The profile residing in <paramref name="failureMechanism"/>
        /// that should be removed.</param>
        /// <returns>All observable objects affected by this method.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="failureMechanism"/>
        /// or <paramref name="profile"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> RemoveForeshoreProfile(GrassCoverErosionOutwardsFailureMechanism failureMechanism, ForeshoreProfile profile)
        {
            if (failureMechanism == null)
            {
                throw new ArgumentNullException("failureMechanism");
            }
            if (profile == null)
            {
                throw new ArgumentNullException("profile");
            }

            var changedObservables = new List<IObservable>();
            WaveConditionsInput[] calculationInputs = failureMechanism.Calculations
                                                                      .Cast<GrassCoverErosionOutwardsWaveConditionsCalculation>()
                                                                      .Select(c => c.InputParameters)
                                                                      .ToArray();
            changedObservables.AddRange(OnWaveConditionsInputForeshoreProfileRemoved(profile, calculationInputs));

            failureMechanism.ForeshoreProfiles.Remove(profile);
            changedObservables.Add(failureMechanism.ForeshoreProfiles);

            return changedObservables;
        }

        /// <summary>
        /// Removes a given <see cref="DikeProfile"/> from the <see cref="GrassCoverErosionInwardsFailureMechanism"/>
        /// and clears all data that depends on it, either directly or indirectly.
        /// </summary>
        /// <param name="failureMechanism">The failure mechanism containing <paramref name="profile"/>.</param>
        /// <param name="profile">The profile residing in <paramref name="failureMechanism"/>
        /// that should be removed.</param>
        /// <returns>All observable objects affected by this method.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="failureMechanism"/>
        /// or <paramref name="profile"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> RemoveDikeProfile(GrassCoverErosionInwardsFailureMechanism failureMechanism, DikeProfile profile)
        {
            if (failureMechanism == null)
            {
                throw new ArgumentNullException("failureMechanism");
            }
            if (profile == null)
            {
                throw new ArgumentNullException("profile");
            }

            var changedObservables = new HashSet<IObservable>();
            GrassCoverErosionInwardsCalculation[] calculations = failureMechanism.Calculations
                                                                                 .Cast<GrassCoverErosionInwardsCalculation>()
                                                                                 .ToArray();
            GrassCoverErosionInwardsCalculation[] calculationWithRemovedDikeProfile = calculations
                .Where(c => ReferenceEquals(c.InputParameters.DikeProfile, profile))
                .ToArray();
            foreach (GrassCoverErosionInwardsCalculation calculation in calculationWithRemovedDikeProfile)
            {
                calculation.InputParameters.DikeProfile = null;
                IEnumerable<GrassCoverErosionInwardsFailureMechanismSectionResult> changedSectionResults =
                    GrassCoverErosionInwardsHelper.Delete(failureMechanism.SectionResults, calculation, calculations);
                foreach (GrassCoverErosionInwardsFailureMechanismSectionResult result in changedSectionResults)
                {
                    changedObservables.Add(result);
                }
                changedObservables.Add(calculation.InputParameters);
            }

            failureMechanism.DikeProfiles.Remove(profile);
            changedObservables.Add(failureMechanism.DikeProfiles);

            return changedObservables;
        }

        private static IEnumerable<IObservable> ClearReferenceLineDependentData(IFailureMechanism failureMechanism)
        {
            failureMechanism.ClearAllSections();
            return new[]
            {
                failureMechanism
            };
        }

        private static IEnumerable<IObservable> OnWaveConditionsInputForeshoreProfileRemoved(ForeshoreProfile profile, WaveConditionsInput[] calculationInputs)
        {
            var changedObservables = new List<IObservable>();
            foreach (WaveConditionsInput input in calculationInputs.Where(input => ReferenceEquals(input.ForeshoreProfile, profile)))
            {
                input.ForeshoreProfile = null;
                changedObservables.Add(input);
            }
            return changedObservables;
        }
    }
}