using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static System.Console;

namespace _2018_08
{
    class Program
    {
        static void Main(string[] args)
        {
            //string[] resTab = File.ReadAllText(@"..\..\..\Data\Adventofcode_181208\2018_08_data.txt").Split(' ');
            string[] resTab = @"2 3 0 3 10 11 12 1 1 0 1 99 2 1 1 2".Split(' ');
            int[] numbers = new int[resTab.Length];
            for (int i = 0; i < resTab.Length; i++)
            {
                numbers[i] = int.Parse(resTab[i]);
            }
            WriteLine($"Antal värden = {resTab.Length}");
            ReadKey();

            var pgm = new Program();
            int x = pgm.CalculateMetaData(numbers);

        }

        private int CalculateMetaData(int[] numbers)
        {
            int tempSum = 0;
            LinkedList<TreeNode> llT = new LinkedList<TreeNode>();
            TreeNode strtNode = new TreeNode(0, numbers);
            llT.AddLast(strtNode);
            int headEnd = 0;
            int firstAnt = strtNode.AntChilds;

            TreeNode nxt = new TreeNode(strtNode.HeaderStart+2, numbers);

            for (int i = 0; i < firstAnt; i++)
            {
                headEnd = this.SubProc(nxt, numbers, llT);
                if (i < firstAnt - 1)
                {
                    nxt = new TreeNode(headEnd , numbers);
                    llT.AddLast(nxt);
                }
            }

            return tempSum;
        }

        private int SubProc(TreeNode tn, int[] numbers, LinkedList<TreeNode> ll)
        {
            int nEnd = 0;

            if (tn.AntChilds > 0)
            {
                var tnx = new TreeNode(tn.HeaderStart + 2, numbers);
                ll.AddLast(tnx);
                nEnd = SubProc(tnx, numbers, ll);

            }

            tn.PrepMetatab(nEnd);
            return tn.NodeEnd;
        }

    }

    public class TreeNode
    {
        public int HeaderStart { get; set; }
        public int AntChilds { get; set; }
        public int AntMetaEntries { get; set; }
        public int[] MetaTab { get; set; }
        public int NodeEnd { get; set; }
        public int[] NumberTab { get; set; }

        public TreeNode(int treeNodeStart, int[] NumTab)
        {
            NumberTab = NumTab;
            HeaderStart = treeNodeStart;
            AntChilds = NumberTab[HeaderStart];
            AntMetaEntries = NumberTab[HeaderStart + 1];
            NodeEnd = HeaderStart + 2 + AntMetaEntries;
        }

        public void PrepMetatab(int subLen)
        {
            NodeEnd += subLen;
            MetaTab = new int[AntMetaEntries];
            for (int i = 0, j = NodeEnd - AntMetaEntries; j < NodeEnd; j++, i++)
            {
                MetaTab[i] = NumberTab[j];
            }
        }

    }
}