using System;

namespace connect4
{
    class Program
    {
        static void Main(string[] args)
        {
            //Setting column and row length
            //int rowLength = 3;
            //int columnLength = 3;
            //int checkOne = [0, 1];
           
            char player = 'O';
            //int emptyCellCheck = 6;
            //initializing 2D array (playing board)
            char[,] playingBoard = new char[7, 6]; 
            
            initialize(playingBoard);

            
            
            
            while (true)
            {
                Console.Clear();
                printBoard(playingBoard); // Call

                //Enter Row             
                int row = 6;

                //Enter column
                Console.Write("Please enter column: ");
                int col = int.Parse(Console.ReadLine());

                //Check for space taken


                /*if (playingBoard[6, col] == 'X' || playingBoard[6, col] == 'O')
                {
                emptyCellCheck = emptyCellCheck - 1;
                playingBoard[emptyCellCheck, col] = player;
                Console.WriteLine(emptyCellCheck);

                }*/
                
                for (int i = 0; i < 8; i++)
                {
                    //Invalid move
                    if (row == -1)//Higher than the board
                    {
                        Console.WriteLine("INVALID MOVE");
                        if (player == 'X')
                        {
                            player = 'O';
                        }
                        else
                        {
                            player = 'X';
                        }
                        
                        break;

                    }

                    //Checks chosen column
                    if (playingBoard[row, col] == 'X' || playingBoard[row, col] == 'O')
                    {
                        row = row - 1;
                        Console.WriteLine("SPACE TAKEN");
                        //Console.ReadLine();

                        
                        
                    }
                    //If space is not taken
                    else
                    {
                        //Update board with player
                        playingBoard[row, col] = player;
                        break;
                    }
                    
                }
               
                

                player = changeTurn(player);
                

                //checkWin(player);

            }
            

            

           
            


            
           
        }
        /*static void checkWin(player)
        {
            if (player == playingBoard[0, 0] && player == playingBoard[0, 0] && player == playingBoard[0, 0])
            {

            }
        }*/
        static char changeTurn(char player)
        {
            if (player == 'X')
            {
                return 'O';
            }
            else
            {
                return 'X';
            }
        }

        

        //initialize board (pulling set array)
        static void initialize(char[,] playingBoard)
        {
            for (int row = 0; row < 7; row++)
            {              
                for (int col = 0; col < 6; col++)
                {
                    playingBoard[row, col] = ' ';
                }         
            }
        }


        //Generate board (pulling array)
        static void printBoard(char[,] playingBoard)
        {
            Console.WriteLine(" | 0| 1 | 2 | 3 | 4 | 5 |");
            for (int row = 0; row < 7; row++)
            {
                Console.Write(row + "|");
                for (int col = 0; col < 6; col++)
                {
                    Console.Write(playingBoard[row, col]);
                    Console.Write(" | ");
                }
                Console.WriteLine();
            }
        }
    }
}