using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static public void Main(string[] args)
        {
            Console.WriteLine("Welcome to tic-tac-toe!");
            Console.WriteLine("Press enter to begin...");
            Console.ReadLine();
            int[] Data = Init();
            int Turn = 1;
            while(!(bool)Victory(Data)[0])
            {
                switch (Turn)
                {
                    case 1:
                        Turn = 2;
                        break;
                    case 2:
                        Turn = 1;
                        break;
                }
                Draw(Data);
                Input(Turn, Data);
            }
            Draw(Data);
            Console.WriteLine(Symbol((int)Victory(Data)[1]) + " wins the game!");
            Console.ReadLine();
        }
        static private int[] Init()
        {
            return new int[9];
        }
        static private void Draw(int[] Data)
        {
            Console.Clear();
            Console.WriteLine("Controls:\n"); //Show controls
            Console.WriteLine("+-+-+-+");
            Console.WriteLine("|1|2|3|");
            Console.WriteLine("+-+-+-+");
            Console.WriteLine("|4|5|6|");
            Console.WriteLine("+-+-+-+");
            Console.WriteLine("|7|8|9|");
            Console.WriteLine("+-+-+-+\n\n");

            Console.WriteLine("Playing...\n"); //Show active board
            Console.WriteLine("+-+-+-+");
            Console.WriteLine("|" + Symbol(Data[0]) + "|" + Symbol(Data[1]) + "|" + Symbol(Data[2]) + "|");
            Console.WriteLine("+-+-+-+");
            Console.WriteLine("|" + Symbol(Data[3]) + "|" + Symbol(Data[4]) + "|" + Symbol(Data[5]) + "|");
            Console.WriteLine("+-+-+-+");
            Console.WriteLine("|" + Symbol(Data[6]) + "|" + Symbol(Data[7]) + "|" + Symbol(Data[8]) + "|");
            Console.WriteLine("+-+-+-+\n");
        }
        static private string Symbol(int Val)
        {
            switch (Val)
            {
                case 1:
                        return "O";
                case 2:
                        return "X";
                default:
                        return " ";
            }
        }
        static private object[] Victory(int[] Data)
        {
            object[] Win = new object[2];
            Win[0] = false;
            Win[1] = 0;
            for (int i = 0; i < 9; i+=3) //Check for horizontal line
            {
                if (Data[i] == 0 || Data[i + 1] == 0 || Data[i + 2] == 0)
                    continue;
                if (Data[i] == Data[i + 1] && Data[i + 1] == Data[i + 2])
                {
                    Win[0] = true;
                    Win[1] = Data[i];
                    return Win;
                }
            }
            for (int i = 0; i < 3; i++) //Check for vertical line
            {
                if (Data[i] == 0 || Data[i + 3] == 0 || Data[i + 6] == 0)
                    continue;
                if (Data[i] == Data[i + 3] && Data[i + 3] == Data[i + 6])
                {
                    Win[0] = true;
                    Win[1] = Data[i];
                    return Win;
                }
            }
            if (Data[4] == 0)
                return Win;
            if (Data[0] == Data[4] && Data[4] == Data[8])
            {
                Win[0] = true;
                Win[1] = Data[4];
                return Win;
            }
            if (Data[6] == Data[4] && Data[4] == Data[2])
            {
                Win[0] = true;
                Win[1] = Data[4];
                return Win;
            }
            return Win;
        }
        static private void Input(int Turn, int[] Data)
        {
            Console.WriteLine("Place an " + Symbol(Turn));
            int Pos = 0;
            while (Pos == 0)
            {
                Console.WriteLine("Use numbers 1-9 to place");
                try
                {
                    Pos = Convert.ToInt32(Console.ReadLine());
                }
                catch (FormatException)
                {
                    Console.WriteLine("ERROR: Not an int");
                }
                catch (OverflowException)
                {
                    Console.WriteLine("ERROR: Number too large");
                }
                if (1 <= Pos && Pos <= 9)
                {
                    if (Data[Pos - 1] == 0)
                        Data[Pos - 1] = Turn;
                    else
                        Pos = 0;
                }
            }
        }
    }
}