using System;
using CommandLine;
using CommandLine.Text;
using Deltares.Standard;
using Deltares.Standard.Reflection;

namespace Deltares.Dam.Application.Live
{
    internal class CommandOptions : CommandLineOptionsBase
    {
        public const string DefaultOutputTimeSeriesFileName = "live.OutputTimeSeries.xml";
        public const string DefaultInputTimeSeriesFileName = "live.InputTimeSeries.xml";
        public const string DefaultParamFileName = "live.ParametersFile.xml";

        [Option("d", "damxFile", Required = true, HelpText = "Name and path of the input DAMX file")]
        public string DamXFileName { get; set; }

        [Option("i", "inTimeSeriesFile", Required = false, DefaultValue = DefaultInputTimeSeriesFileName, HelpText = "Name and path of the input time series file. Should contain all locations or sensors")]
        public string TimeSeriesInputFileName { get; set; }

        [Option("o", "outTimeSeriesFile", Required = false,  DefaultValue = DefaultOutputTimeSeriesFileName, HelpText = "Name and path of the output time series file")]
        public string TimeSeriesOutputFileName { get; set; }

        [Option("p", "paramFile", Required = false, DefaultValue = DefaultParamFileName, HelpText = "Name and path of the calculation parameters file")]
        public string ParameterFileName { get; set; }

        [Option("f", "filter", Required = false, HelpText = "Filter to tell the runner only to handle the locations specified")]
        public string Filter { get; set; }

        readonly AssemblyInfoHelper assemblyInfoHelper = new AssemblyInfoHelper(typeof(Program));
        private AssemblyInfoHelper ThisAssembly
        {
            get
            {                
                return assemblyInfoHelper;
            }
        }

        [HelpOption]			
        public string GetUsage()
        {
            var help = new HelpText
                       {
                           Heading = new HeadingInfo(ThisAssembly.Title, ThisAssembly.AssemblyVersion),					
                           Copyright = new CopyrightInfo(ThisAssembly.Company, 2012),					
                           AdditionalNewLineAfterOption = true,					
                           AddDashesToOption = true
                       };	
            
            this.HandleParsingErrorsInHelp(help);	
            
            //help.AddPreOptionsLine("<<license details here.>>");
            help.AddPreOptionsLine("Usage: damlive[.exe] -d DamXInputFile -i InputTimeSeriesFileName  -o OutputTimeSeriesFileName [-p CalculationParametersFileName] [-f LocationFilter(comma separated)");				
            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);
                }
            }
        }

    }
}