using System;
using System.Text;

namespace TicTacToeCommandLine
{
    class TicTacToe
    {
        enum GameValue { E, X, O};
        enum Winner { NONE , X, O};

        static Winner checkWinner(GameValue[] table)
        {
            //horizontal
            for (int j=0;j<3;++j)
                if (    table[3 * j] != GameValue.E 
                    &&  table[3 * j] == table[3 * j + 1] 
                    &&  table[3 * j+ 1] == table[3 * j + 2])
                {
                    if (table[3 * j] == GameValue.X)
                        return Winner.X;
                    else
                        return Winner.O;
                }
            //vertical
            for (int i = 0; i < 3; ++i)
                if (table[i] != GameValue.E
                    && table[i] == table[i + 3]
                    && table[i + 3] == table[i + 6])
                {
                    if (table[3 * i] == GameValue.X)
                        return Winner.X;
                    else
                        return Winner.O;
                }
            //diagonal
            if (table[0] != GameValue.E
                && table[0] == table[4]
                && table[4] == table[8])
            {
                if (table[0] == GameValue.X)
                    return Winner.X;
                else
                    return Winner.O;
            }
            if (table[2] != GameValue.E
                && table[2] == table[4]
                && table[4] == table[6])
            {
                if (table[2] == GameValue.X)
                    return Winner.X;
                else
                    return Winner.O;
            }
            return Winner.NONE;
        }

        static void showTable(GameValue[] table)
        {
            Console.WriteLine("---------------------");
            for (int j = 0; j < 3 ; ++j)
            {
                Console.Write("I");
                for (int i = 0; i < 3; ++i)
                {
                    Console.Write("{0} I ", table[i + 3 * j].ToString()); 
                }
                Console.WriteLine("");
                Console.WriteLine("---------------------");
            }
        }

        static void Main(string[] args)
        {
            GameValue[] table = new GameValue[9];
            for (int i = 0; i < table.Length; ++i)
                table[i] = GameValue.E;

            uint plays = 0;
            int currentPlayer = 0;
            Winner state=Winner.NONE;

            for (; plays < 9; )
            {
                showTable(table);
                Console.WriteLine("please enter a number (1-9): ");
                string k = Console.ReadLine();

                try
                {
                    Console.WriteLine("Entered: {0}", k);
                    int index;

                    try
                    {
                        index = Convert.ToInt32(k)-1;
                    }
                    catch (FormatException e)
                    {
                        Console.WriteLine("please enter a number!!!");
                        continue;
                    }
                    GameValue curr = table[index];
                    Console.WriteLine("Entered: {0}", index);

                    if (curr != GameValue.E)
                    {
                        Console.WriteLine("This is already taken");
                        continue;
                    }
                    if (currentPlayer == 0)
                    {
                        table[index] = GameValue.O;
                    }
                    else
                    {
                        table[index] = GameValue.X;
                    }

                    if ((state=checkWinner(table)) != Winner.NONE)
                    {
                        break;
                    }

                    currentPlayer++;
                    if (currentPlayer > 1)
                        currentPlayer = 0;
                    ++plays;
                }
                catch (IndexOutOfRangeException e)
                {
                    Console.WriteLine("Please enter a number between 1 and 9");
                }
            }

            if (state == Winner.O)
            {
                Console.WriteLine("Congratulations player 1");
            }
            else if (state == Winner.X)
            {
                Console.WriteLine("Congratulations player 2");
            }
            else
            {
                Console.WriteLine("DRAW!!!");
            }

            showTable(table);

            Console.ReadLine();
        }
    }
}