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

namespace ArraysnShit
{
    class ChessGame
    {
        static byte[,] chessGrid = new byte[8, 8];
        static string moveFrom;
        static string moveTo;
        static int rowNum;
        static void Main(string[] args)
        {
            PieceInit();
            while (true)
            {
                Console.Clear();
                DrawGrid();
                Console.Write("Move from:");
                moveFrom = Console.ReadLine();

                if (CheckInput(moveFrom))
                {
                    Console.Clear();
                    DrawGrid();
                    Console.Write("Move to:");
                    moveTo = Console.ReadLine();
                    if (CheckInput(moveTo))
                    {
                        //do THE move
                        byte temp = chessGrid[moveFrom[0] - 97, moveFrom[1] - 49];
                        chessGrid[moveTo[0] - 97, moveTo[1] - 49] = temp; //copy paste
                        if(moveFrom != moveTo)
                        {
                            chessGrid[moveFrom[0] - 97, moveFrom[1] - 49] = 0; //delete first copy
                        }
                    }
                }
                Console.Clear();
                DrawGrid();
            }
            Console.ReadKey();
        }

        static bool CheckInput(string input)
        {
            input.ToLower();
            if (input.Length == 2)
            {
                if (input[0] >= 97 && input[0] <= 104 && input[1] >= 49 && input[1] <= 57)
                {
                    return true;
                }
            }
            return false;
        }

        static void DrawGrid()
        {
            rowNum = 1;
            for (int y = 0; y < chessGrid.GetLength(0); y++)
            {
                Console.Write(rowNum++ + " | ");
                for (int x = 0; x < chessGrid.GetLength(0); x++)
                {
                    if (chessGrid[x, y] == 0)
                    {
                        Console.Write((char)48);
                    }
                    else
                    {
                        Console.Write((char)chessGrid[x, y]);
                    }
                    Console.Write(" ");
                }
                Console.WriteLine("");
            }
            Console.WriteLine("    _______________\n    a b c d e f g h\n");
        }

        static void PieceInit()
        {
            PawnsAss();
            RooksAss();
            KnightsAss();
            BishopsAss();
            RoyalsAss();
        }

        static void PawnsAss()
        {
            //black pawns
            for (int x = 0; x < chessGrid.GetLength(0); x++)
            {
                chessGrid[x, 1] = 80; //R
            }

            //white pawns
            for (int x = 0; x < chessGrid.GetLength(0); x++)
            {
                chessGrid[x, 6] = 112; //r
            }
        }

        static void RooksAss()
        {
            //black rooks
            chessGrid[0, 0] = 82; //R
            chessGrid[7, 0] = 82; //R

            //white rooks
            chessGrid[0, 7] = 114; //r
            chessGrid[7, 7] = 114; //r
        }

        static void KnightsAss()
        {
            //black knights
            chessGrid[1, 0] = 72; //H
            chessGrid[6, 0] = 72; //H

            //white knights
            chessGrid[1, 7] = 104; //h
            chessGrid[6, 7] = 104; //h
        }

        static void BishopsAss()
        {
            //black bishops
            chessGrid[2, 0] = 66; //B
            chessGrid[5, 0] = 66; //B

            //white bishops
            chessGrid[2, 7] = 98; //b
            chessGrid[5, 7] = 98; //b
        }

        static void RoyalsAss()
        {
            //black pieces
            chessGrid[3, 0] = 81; //Q
            chessGrid[4, 0] = 75; //K

            //white pieces
            chessGrid[3, 7] = 113; //q
            chessGrid[4, 7] = 107; //k
        }
    }
}