// 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 Core.Common.Base.Data;
using Ringtoets.Common.Data.Calculation;
using Ringtoets.Common.Data.Structures;
using Ringtoets.HydraRing.Data;

namespace Ringtoets.Common.Service
{
    /// <summary>
    /// Service for synchronizing common data 
    /// </summary>
    public static class RingtoetsCommonDataSynchronizationService
    {
        /// <summary>
        /// Clears the output of the hydraulic boundary locations within the collection.
        /// </summary>
        /// <param name="locations">The locations for which the output needs to be cleared.</param>
        /// <returns>All objects changed during the clear.</returns>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="locations"/> is <c>null</c>.</exception>
        public static IEnumerable<IObservable> ClearHydraulicBoundaryLocationOutput(IEnumerable<HydraulicBoundaryLocation> locations)
        {
            if (locations == null)
            {
                throw new ArgumentNullException("locations");
            }

            return locations.SelectMany(ClearHydraulicBoundaryLocationOutput)
                            .ToArray();
        }

        /// <summary>
        /// Clears the output of the given <see cref="StructuresCalculation{T}"/>.
        /// </summary>
        /// <param name="calculation">The <see cref="StructuresCalculation{T}"/> to clear the output for.</param>
        /// <exception cref="ArgumentNullException">Thrown when <paramref name="calculation"/> is <c>null</c>.</exception>
        /// <returns>All objects that have been changed.</returns>
        public static IEnumerable<IObservable> ClearCalculationOutput<T>(StructuresCalculation<T> calculation) where T : ICalculationInput, new()
        {
            if (calculation == null)
            {
                throw new ArgumentNullException("calculation");
            }

            if (calculation.HasOutput)
            {
                calculation.ClearOutput();
                return new[]
                {
                    calculation
                };
            }
            return Enumerable.Empty<IObservable>();
        }

        private static IEnumerable<IObservable> ClearHydraulicBoundaryLocationOutput(HydraulicBoundaryLocation location)
        {
            if (!double.IsNaN(location.DesignWaterLevel) ||
                !double.IsNaN(location.WaveHeight))
            {
                location.DesignWaterLevel = RoundedDouble.NaN;
                location.WaveHeight = RoundedDouble.NaN;
                location.DesignWaterLevelCalculationConvergence = CalculationConvergence.NotCalculated;
                location.WaveHeightCalculationConvergence = CalculationConvergence.NotCalculated;

                return new[]
                {
                    location
                };
            }
            return Enumerable.Empty<IObservable>();
        }
    }
}