using ProjectGrid.Models;
using ProjectGrid.TicTacToc;
using System;
using System.Collections.Generic;
using System.Linq;

namespace ProjectGrid.AI
{
  public class TicTacTocBrain
  {
    private TicTacTocBoard _board;
    private int _player;

    private List<int> _prio;

    public TicTacTocBrain(TicTacTocBoard board, Player player)
    {
      _board = board;
      _player = (int)player;

      var rand = new Random();
      _prio = (new List<int> { 0, 1, 2, 3, 4, 5, 6, 7, 8 }).OrderBy(i => rand.Next()).ToList();
    }

    public int Turn()
    {
      if (_board.Field[5] == (int)Player.EMPTY)
      {
        //_board.SetFieldValue(_player, 5);
        return 5;
      }

      for (int x = 0; x < TicTacTocBoard._winning.GetLength(0); x++)
      {
        var _1 = TicTacTocBoard._winning[x, 0];
        var _2 = TicTacTocBoard._winning[x, 1];
        var _3 = TicTacTocBoard._winning[x, 2];

        int result = Match2(_1, _2, _3);
        if (result > 0)
        {
          //_board.SetFieldValue(_player, );
          return TicTacTocBoard._winning[x, result];
        }
      }

      foreach (var i in _prio)
        if (_board.Field[i] == 0)
          return i;

      return -1;
    }

    private int Match2(int _1, int _2, int _3)
    {
      if (_1 == _player && _2 == _player && _3 == 0)
        return 3;

      if (_1 == _player && _2 == 0 && _3 == _player)
        return 2;

      if (_1 == 0 && _2 == _player && _3 == _player)
        return 1;

      return 0;
    }
  }
}