ConsoleArguments

using System.Collections.Generic;

namespace w3x.Common
{
    /// <summary>
    /// Example input:
    ///   app.exe -port 1234 -enableSomething -mode elevated silent somethingElse
    /// Interpreted as:
    ///   { port : { 0 : "1234" } },
    ///   { enableSomething },
    ///   { mode : { 0 : elevated, 1 : silent, 2 : somethingElse } }
    /// </summary>
    public class ConsoleArguments : IArguments
    {
        public static class Arg
        {
            public const string Port = "port";
        }

        private IDictionary<string, IList<string>> _internal;
        private readonly ILogger _logger;

        public ConsoleArguments(ILogger logger)
        {
            _logger = logger;
        }

        #region IArguments
        public void Set(IEnumerable<string> args)
        {
            ProcessArguments(args);
        }

        public IList<string> Get(string name)
        {
            _logger.Debug(string.Format("Argument '{0}' accessed", name));

            return _internal[name];
        }
        #endregion

        private void ProcessArguments(IEnumerable<string> args)
        {
            _logger.Debug("Processing the arguments");

            _internal = new Dictionary<string, IList<string>>();

            var lastArg = string.Empty;

            foreach (var arg in args)
            {
                if (!arg.StartsWith("-"))
                {
                    if (!string.IsNullOrEmpty(lastArg))
                        _internal[lastArg].Add(arg);

                    continue;
                }

                lastArg = arg.Substring(1);
                _internal.Add(lastArg, new List<string>());
            }
        }
    }
}