using GpsClient2.Exceptions;
using GpsClient2.NmeaMessages;
using System;
using System.Collections.Generic;

namespace GpsClient2 {
    public static class NmeaConstants {
        private static readonly Dictionary<string, Type> TypeDictionary = new Dictionary<string, Type>
        {
            {"GPGGA", typeof(GpggaMessage)},
            {"GPRMC", typeof(GprmcMessage)},
            {"GPVTG", typeof(GpvtgMessage)},
            {"GPGSA", typeof(GpgsaMessage)}
        };

        /// <summary>
        /// Returns the correct class type of the message.
        /// </summary>
        /// <param name="typeName">The type name given.</param>
        /// <returns>The class type.</returns>
        /// <exception cref="UnknownTypeException">Given if the type is unkown.</exception>
        public static Type GetClassType(string typeName) {
            Type result;
            TypeDictionary.TryGetValue(typeName, out result);

            if (result == null) {
                throw new UnknownTypeException();
            }

            return result;
        }
    }
}