// Copyright (C) Stichting Deltares 2020. 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 CommandLine;
using CommandLine.Text;

namespace Deltares.LayerOnSlopeTool.Application
{
    internal class CommandOptions : CommandLineOptionsBase
    {
        public const string DefaultInputFolder = "Input";
        public const string DefaultOutputFolder = "Output";
        public const string DefaultGeometriesFolder = "Geometries";

        [Option("i", "input", Required = true, DefaultValue = DefaultInputFolder, HelpText = "Name and path of the input folder.")]
        public string InputFolderName { get; set; }

        [Option("g", "geometries", Required = true, DefaultValue = DefaultGeometriesFolder, HelpText = "Name and path of the geometries folder.")]
        public string GeometriesFolderName { get; set; }

        [Option("o", "output", Required = false, DefaultValue = DefaultOutputFolder, HelpText = "Name and path of the output folder.")]
        public string OutputFolderName { get; set; }

        [HelpOption]
        public string GetUsage()
        {
            var help = new HelpText
            {
                Heading = "Layer on Slope Tool",
                Copyright = "Copyright (c) 2020 Deltares",
                AdditionalNewLineAfterOption = true,
                AddDashesToOption = true
            };

            this.HandleParsingErrorsInHelp(help);

            help.AddPreOptionsLine("Usage: LayerOnSlopeTool[.exe] -i InputFile [ -o OutputFile]");
            help.AddOptions(this);

            return help;
        }

        void HandleParsingErrorsInHelp(HelpText help)
        {
            if (this.LastPostParsingState.Errors.Count > 0)
            {
                var errors = help.RenderParsingErrorsText(this, 2); // indent with two spaces					
                if (!string.IsNullOrEmpty(errors))
                {
                    help.AddPreOptionsLine(string.Concat(Environment.NewLine, "ERROR(S):"));
                    help.AddPreOptionsLine(errors);
                }
            }
        }

    }

}