// Copyright (C) Stichting Deltares 2023. All rights reserved.
// 
// This file is part of the application DAM - Live.
// 
// DAM - Live 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.IO;
using CommandLine;
using Deltares.Dam.Data;
using Deltares.Dam.Data.License;
using Deltares.Standard.Application;
using Deltares.Standard.Reflection;
using log4net.Config;

namespace Deltares.DamLive.Application;

internal class Program
{
    internal static readonly LogHelper Logger = LogHelper.Create("DamLive");

    private const string dAuthFeature = "DGS_27_00";
    static readonly AssemblyInfoHelper info = new AssemblyInfoHelper(typeof(Program));

    /// <summary>
    /// Starts the calculations.
    /// </summary>
    /// <param name="damXFile">The path of the .damx file</param>
    /// <param name="fewsInputFile">The FEWS input file.</param>
    /// <param name="fewsOutputFile">The FEWS output file.</param>
    /// <param name="calculationParametersFile">Settings of calculation parameters</param>
    /// <param name="filter">Filter to specify locations to handle</param>        
    internal void StartCalculations(string damXFile, string fewsInputFile, string fewsOutputFile, string calculationParametersFile = "", string filter = "")
    {
        if (string.IsNullOrWhiteSpace(damXFile))
        {
            throw new ArgumentException("damXFile");
        }

        if (string.IsNullOrWhiteSpace(fewsInputFile))
        {
            throw new ArgumentException("fewsOutputFile");
        }

        if (string.IsNullOrWhiteSpace(fewsOutputFile))
        {
            throw new ArgumentException("fewsExportFile");
        }

        if (!File.Exists(damXFile))
        {
            throw new FileNotFoundException(damXFile);
        }

        string workDir = Path.GetDirectoryName(damXFile) ?? ".\\";
        if (!File.Exists(fewsInputFile))
        {
            fewsInputFile = Path.Combine(workDir, fewsInputFile);
            if (!File.Exists(fewsInputFile))
            {
                throw new FileNotFoundException(fewsInputFile);
            }
        }

        if (!File.Exists(fewsOutputFile))
        {
            fewsOutputFile = Path.Combine(workDir, fewsOutputFile);
            if (!File.Exists(fewsOutputFile))
            {
                throw new FileNotFoundException(fewsOutputFile);
            }
        }

        if (!File.Exists(calculationParametersFile))
        {
            calculationParametersFile = Path.Combine(workDir, calculationParametersFile);
            if (!File.Exists(calculationParametersFile))
            {
                throw new FileNotFoundException(calculationParametersFile);
            }
        }

        var damEngineRunner = new DamEngineRunner
        {
            ParametersFile = new FileInfo(calculationParametersFile),
            FewsInputFile = new FileInfo(fewsInputFile),
            FewsOutputFile = new FileInfo(fewsOutputFile),
            DamXFile = new FileInfo(damXFile),
            Filter = filter
        };
        DamProject.SetTestProgramVersion("19.1");
        damEngineRunner.Run();
    }

    static void Main(string[] args)
    {
        DamLicense.CheckoutLicense(dAuthFeature, info.AssemblyVersion);

        XmlConfigurator.Configure();
        try
        {
            if (DamLicense.DamLicenseType == DamLicenseType.None)
            {
                throw new Exception("No license found for DamLive");
            }

            Run(args);
        }
        catch (Exception e)
        {
            Console.WriteLine();
            Logger.LogFatal("There was an unexpected error. Program terminated", e);
        }

        DamLicense.CheckinLicense();
    }

    static void Run(string[] args)
    {
        var commandLineArguments = new CommandOptions();
        ICommandLineParser parser = new CommandLineParser();
        bool success = parser.ParseArguments(args, commandLineArguments);
        if (success)
        {
            var program = new Program();

            CreateOutputTimeSeriesFileIfNeeded(
                commandLineArguments.TimeSeriesOutputFileName,
                Path.GetDirectoryName(commandLineArguments.TimeSeriesOutputFileName));

            var thisAssembly = new AssemblyInfoHelper(typeof(Program));
            Logger.LogInfo(thisAssembly.Title + " " + thisAssembly.AssemblyVersion);
            Logger.LogInfo(thisAssembly.Copyright);
            Logger.LogInfo("Model runner started");
            Console.WriteLine();
            program.StartCalculations(
                commandLineArguments.DamXFileName,
                commandLineArguments.TimeSeriesInputFileName,
                commandLineArguments.TimeSeriesOutputFileName,
                commandLineArguments.ParameterFileName,
                commandLineArguments.Filter);
            Console.WriteLine();
            Logger.LogInfo("Model runner ended");
        }
        else
        {
            Console.WriteLine();
            Console.WriteLine(commandLineArguments.GetUsage());
        }
    }

    private static void CreateOutputTimeSeriesFileIfNeeded(string fileName, string path)
    {
        string filePath = Path.Combine(path, Path.GetFileName(fileName));
        if (!File.Exists(filePath))
        {
            using (StreamWriter stream = File.CreateText(filePath))
            {
                string xml =
                    "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>" + Environment.NewLine +
                    "<TimeSeries xmlns=\"http://www.wldelft.nl/fews/PI\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" version=\"1.2\">" +
                    Environment.NewLine +
                    "\t<timeZone>0</timeZone> " + Environment.NewLine +
                    "</TimeSeries>";

                stream.Write(xml);
            }
        }
    }
}