using System;
using System.Collections.Generic;
using System.Linq;

namespace Xylem.Common.Logic.ProductionOrderCore.Vako
{
    /// <summary>
    /// VAKO decoder
    /// </summary>
    public static class VakoParser
    {
        /// <summary>
        /// Parser of VAKO code
        /// </summary>
        /// <param name="rawVako"></param>
        /// <param name="vakoMaps"></param>
        /// <returns></returns>
        public static VakoData Parse(RawVako rawVako, List<VakoMap> vakoMaps)
        {
            var ret = new VakoData
            {
                KeyValues = new List<VakoKeyValue>()
            };

            //var d = vakoMaps.GroupBy(g => new Tuple<Int32, Int32>(g.Stelle, g.Laenge));
            //d = 99
            foreach (var checkVakoIsMatching in vakoMaps.GroupBy(g => new Tuple<Int32, Int32>(g.Stelle, g.Laenge)))
            {
                var actualStart = checkVakoIsMatching.Key.Item1 - 1;
                var actualLength = checkVakoIsMatching.Key.Item2;
                var actualChars = rawVako.VakoString.Substring(actualStart, actualLength);
      
                var matches = checkVakoIsMatching.Where(c => c.Charcode == actualChars);
                // ReSharper disable once PossibleMultipleEnumeration
                if (!matches.Any())
                {
                    //no match warning!
                }
                // ReSharper disable once PossibleMultipleEnumeration
                if (matches.Count() == 1)
                {
                    // ReSharper disable once PossibleMultipleEnumeration
                    var match = matches.First();
                    ret.KeyValues.Add(new VakoKeyValue
                    {
                        Desc = match.Bemerkung,
                        Key = match.Schluessel,
                        Name = match.Name,
                        Charcode = match.Charcode,
                        Value = match.Wert,
                    });
                }
            }
 
            return ret;
        }
    }
}