using System;
using System.Collections.Generic;
using System.Drawing.Design;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace PocketGoogle
{
    public class Indexer : IIndexer
    {
        public Dictionary<string, Dictionary<int, List<int>>> Dict =
            new Dictionary<string, Dictionary<int, List<int>>>();

        public int[] Intcol = new int[] { };

        // public Dictionary<int,Dictionary<int,char>> dict2 = new Dictionary<int, Dictionary<int, char>>();
        public Dictionary<int, char[]> Dict2 = new Dictionary<int, char[]>();

        public void Add(int id, string documentText)
        {
            var split = new char[] {' ', '.', ',', '!', '?', ':', '-', '\r', '\n'};
            var positionofWord = 0;
            var a = new List<int>();
            foreach (var word in documentText.Split(split))
            {
                if (!Dict.ContainsKey(word))
                {
                    var dictof = new Dictionary<int, List<int>>();
                    dictof.Add(id, new List<int> {positionofWord});
                    Dict.Add(word, dictof);
                }
                else if (!Dict[word].ContainsKey(id))
                    Dict[word][id] = new List<int> {positionofWord};
                else
                {
                    Dict[word][id].Add(positionofWord);
                }

                positionofWord += word.Length + 1;
            }
        }

        /*  int k = 0;
          var dict3 = new Dictionary<int,char>();
         var bukovki= new char[]{};
        */


        public List<int> GetIds(string word)
        {
            var result = new List<int>();

            if (Dict.ContainsKey(word))
            {
                foreach (var i in Dict[word].Keys)
                {
                    result.Add(i);
                }
            }

            return result;
        }

        public List<int> GetPositions(int id, string word)
        {
            if (Dict.ContainsKey(word) && Dict[word].ContainsKey(id))
            {
                return Dict[word][id];
            }

            return new List<int>();
        }

        public void Remove(int id)
        {
            foreach (var el in Dict.Values)
            {
                if (el.ContainsKey(id)) el.Remove(id);
            }
        }
    }
}