// Copyright (C) Stichting Deltares 2018. 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;
using System.Collections.Generic;
using System.IO;
using System.Text;
using Deltares.DamEngine.Calculators.KernelWrappers.Common;
using Deltares.DamEngine.Calculators.KernelWrappers.Interfaces;
using Deltares.DamEngine.Calculators.Properties;
using Deltares.DamEngine.Data.General;
using Deltares.DamEngine.Data.General.Results;
using Deltares.DamEngine.Data.Standard.Logging;

namespace Deltares.DamEngine.Calculators.DikesDesign
{
    /// <summary>
    /// The Dam Engine design calculator
    /// </summary>
    public class DesignCalculator
    {
        /// <summary>
        /// Performs the design calculation
        /// </summary>
        /// <param name="damProjectData">The dam project data.</param>
        /// <returns></returns>
        public List<LogMessage> Execute(DamProjectData damProjectData)
        {
            IKernelWrapper kernelWrapper = KernelWrapperHelper.CreateKernelWrapper(damProjectData.DamProjectCalculationSpecification.CurrentSpecification);

            if (kernelWrapper == null)
            {
                throw new NotImplementedException(Resources.DesignCalculatorKernelNotImplemented);
            }

            damProjectData.DesignCalculations = new List<DesignResult>();
            var calculationMessages = new List<LogMessage>();
            for (int locationIndex = 0; locationIndex < damProjectData.Dike.Locations.Count; locationIndex++)
            {
                var location = damProjectData.Dike.Locations[locationIndex];
                for (int subSoilScenarioIndex = 0; subSoilScenarioIndex < location.Segment.SoilProfileProbabilities.Count; subSoilScenarioIndex++)
                {
                    var soiProfileProbability = location.Segment.SoilProfileProbabilities[subSoilScenarioIndex];
                    for (int designScenarioIndex = 0; designScenarioIndex < location.Scenarios.Count; designScenarioIndex++)
                    {

                        // Prepare input
                        var damKernelInput = new DamKernelInput();
                        var projectPath = damProjectData.ProjectPath != "" ? damProjectData.ProjectPath : Directory.GetCurrentDirectory();
                        damKernelInput.WorkingDir = Path.Combine(projectPath, damProjectData.CalculationMap);
                        damKernelInput.Location = location;
                        damKernelInput.SubSoilScenario = soiProfileProbability;
                        damKernelInput.DesignScenario = location.Scenarios[designScenarioIndex];
                        damKernelInput.DamFailureMechanismeCalculationSpecification = damProjectData.DamProjectCalculationSpecification.CurrentSpecification;
                        AnalysisType analysisType = DamProjectCalculationSpecification.SelectedAnalysisType;

                        IKernelDataInput kernelDataInput;
                        IKernelDataOutput kernelDataOutput;
                        PrepareResult prepareResult = kernelWrapper.Prepare(damKernelInput, 0, out kernelDataInput, out kernelDataOutput);

                        // Sometimes the kernelDataInput is not created (p.e when soilprofileprobablility is meant for 
                        // stability where Piping calc is wanted). In that case, do nothing but just skip.
                        if (prepareResult == PrepareResult.Successful)
                        {
                            switch (analysisType)
                            {
                                case AnalysisType.AdaptGeometry:
//                                    PerformDesignCalculation(kernelWrapper, kernelDataInput, kernelDataOutput,
//                                        damKernelInput, calculationMessages, damProjectData.DesignCalculations);
//                                    break;
                                case AnalysisType.NoAdaption:
                                    PerformSingleCalculation(kernelWrapper, kernelDataInput, kernelDataOutput,
                                        damKernelInput, calculationMessages, damProjectData.DesignCalculations);
                                    break;

                            }
                        }
                        else
                        {
                            if (prepareResult == PrepareResult.NotRelevant)
                            {
                                calculationMessages.Add(new LogMessage(LogMessageType.Info, null,
                                    string.Format(Resources.DesignCalculatorIrrelevant,
                                    location.Name,
                                    soiProfileProbability.ToString(),
                                    damKernelInput.DesignScenario.LocationScenarioID)));
                            }
                            if (prepareResult == PrepareResult.Failed)
                            {
                                calculationMessages.Add(new LogMessage(LogMessageType.Error, null,
                                    string.Format(Resources.DesignCalculatorPrepareError,
                                    location.Name,
                                    soiProfileProbability.ToString(),
                                    damKernelInput.DesignScenario.LocationScenarioID)));
                            }
                        }

                    }
                }
            }
            return calculationMessages;
        }

        private static void PerformSingleCalculation(IKernelWrapper kernelWrapper, IKernelDataInput kernelDataInput, IKernelDataOutput kernelDataOutput, DamKernelInput damKernelInput,
            List<LogMessage> calculationMessages, List<DesignResult> designCalculations)
        {
            // Perform validation
            List<LogMessage> locationCalculationMessages = new List<LogMessage>();
            List<LogMessage> validationMessages;
            int errorCount = kernelWrapper.Validate(kernelDataInput, kernelDataOutput, out validationMessages);
            if (errorCount > 0)
            {
                locationCalculationMessages.Add(new LogMessage(LogMessageType.Error, null,
                                                               string.Format(Resources.DesignCalculatorValidationFailed,
                                                                             damKernelInput.Location.Name,
                                                                             damKernelInput.SubSoilScenario.ToString(),
                                                                             damKernelInput.DesignScenario.LocationScenarioID)));
                locationCalculationMessages.AddRange(validationMessages);
            }
            else
            {
                // Perform calculation
                kernelWrapper.Execute(kernelDataInput, kernelDataOutput, out locationCalculationMessages);
            }
            // Process output
            calculationMessages.AddRange(locationCalculationMessages);
            List<DesignResult> designResults;
            StringBuilder sb = new StringBuilder();
            foreach (var message in locationCalculationMessages)
            {
                sb.Append(message.Message + Environment.NewLine);
            }
            string resultMessage = sb.ToString();

            kernelWrapper.PostProcess(damKernelInput, kernelDataOutput, resultMessage, out designResults);
            foreach (var designResult in designResults)
            {
                designCalculations.Add(designResult);
            }
        }

        private static void PerformDesignCalculation(IKernelWrapper kernelWrapper, IKernelDataInput kernelDataInput, IKernelDataOutput kernelDataOutput, DamKernelInput damKernelInput,
                                                     List<LogMessage> calculationMessages, List<DesignResult> designCalculations)
        {
            
        }
    }
}