namespace AdventOfCodeLibrary._2022
{
    using AdventOfCodeLibrary.Shared;

    public class Day03Part2 : Answerable
    {
        public override int Year { get; set; } = 2022;
        public override int Day { get; set; } = 3;
        public override int Part { get; set; } = 2;

        public override string GetAnswer(byte[] data)
        {
            string[] rucksackData = GetAsStringArray(data);
            int priorityCount = 0;

            // go throu each ruchsack
            for (int index = 0; index < rucksackData.Length; index += 3)
            {
                // get the 3 ruchsacks
                string[] ruchsacks = rucksackData.Skip(index).Take(3).ToArray();
                char prioChar = ruchsacks[0].Where(x => ruchsacks[1].Contains(x) && ruchsacks[2].Contains(x)).First();
                priorityCount += prioChar > 'Z' ? (prioChar - 'a' + 1) : (prioChar - 'A' + 27);
            }

            return priorityCount.ToString();
        }
    }
}