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

namespace ConsoleApp4
{
    class Program
    {
        static void Main(string[] args)
        {
            Random random = new Random();
            Console.CursorVisible = false;

            bool isPlaying = true;
            int pacmanX, pacmanY;
            int pacmanDX = 0, pacmanDY = 1;
            bool isAlive = true;

            int ghostX, ghostY;
            int ghostDX = 0, ghostDY = -1 ;
            int allDots = 0;
            int collectDots = 0;

            char[,] map = ReadMap("Map1", out pacmanX, out pacmanY, out ghostX, out ghostY, ref allDots);

            DrawMap(map);

            while (isPlaying)
            {
                Console.SetCursorPosition(0, 20);
                Console.WriteLine($"Собрано {collectDots}/{allDots}");

                if (Console.KeyAvailable)
                {
                    ConsoleKeyInfo key = Console.ReadKey(true);
                    ChangeDirection(key,ref pacmanDX, ref pacmanDY);

                }
                if (map[pacmanX + pacmanDX, pacmanY + pacmanDY] != '#')
                {
                    CollectDots(map, pacmanX, pacmanY, ref collectDots);
                    Move(map,'@',ref pacmanX, ref pacmanY, pacmanDX, pacmanDY);
                }

                if (map[ghostX + ghostDX, ghostY + ghostDY] != '#')
                {
                    Move(map,'$', ref ghostX, ref ghostY, ghostDX, ghostDY);
                }else
                {
                    ChangeDirection(random, ref ghostDX, ref ghostDY);
                }
                System.Threading.Thread.Sleep(250);

                if (ghostX == pacmanX && ghostY == pacmanY)
                {
                    isAlive = false;
                }
                if (collectDots == allDots || !isAlive)
                {
                    isPlaying = false;
                }
            }
            Console.SetCursorPosition(0, 21);
            if (collectDots== allDots)
            {
                Console.WriteLine("Вы победили! ");
            }
            else if (!isAlive)
            {
                Console.WriteLine("Вас съели");
            }
        }

        static void Move(char[,] map, char symbol, ref int X, ref int Y, int DX, int DY)
        {
            Console.SetCursorPosition(Y, X);
            Console.Write(map[X,Y]);

            X += DX;
            Y += DY;

            Console.SetCursorPosition(Y, X);
            Console.Write(symbol);
        }

        static void CollectDots (char [,] map, int pacmanX,int pacmanY, ref int collectDots )
        {
            if (map[pacmanX, pacmanY] == '.')
            {
                collectDots++;
                map[pacmanX, pacmanY] = ' ';
            }
        }
        static void ChangeDirection (ConsoleKeyInfo key, ref int DX, ref int DY)
        {
            switch (key.Key)
            {
                case ConsoleKey.UpArrow:
                    DX = -1; DY = 0;
                    break;
                case ConsoleKey.DownArrow:
                    DX = 1; DY = 0;
                    break;
                case ConsoleKey.LeftArrow:
                    DX = 0; DY = -1;
                    break;
                case ConsoleKey.RightArrow:
                    DX = 0; DY = 1;
                    break;
            }
        }
        static void ChangeDirection (Random random, ref int DX, ref int DY)
        {
            int ghostDir = random.Next(1, 5);

            switch (ghostDir)
            {
                case 1:
                    DX = -1; DY = 0;
                    break;
                case 2:
                    DX = 1; DY = 0;
                    break;
                case 3:
                    DX = 0; DY = -1;
                    break;
                case 4:
                    DX = 0; DY = 1;
                    break;
            }
        }
        static void DrawMap(char[,] map)
        {
            for (int i = 0; i < map.GetLength(0); i++)
            {
                for (int j = 0; j < map.GetLength(1); j++)
                {
                    Console.Write(map[i, j]);
                }
                Console.WriteLine();
            }
        }
        static char[,] ReadMap(string mapName, out int pacmanX, out int pacmanY,out int ghostX,out int ghostY, ref int allDots)
        {
            pacmanX = 0;
            pacmanY = 0;
            ghostX = 0;
            ghostY = 0;
            string[] newFile = File.ReadAllLines($"Maps/{mapName}.txt");
            char[,] map = new char[newFile.Length, newFile[0].Length];

            for (int i = 0; i < map.GetLength(0); i++)
            {
                for (int j = 0; j < map.GetLength(1); j++)
                {
                   map[i, j] = newFile[i][j];
                    if(map[i,j]== '@')
                    {
                        pacmanX = i;
                        pacmanY = j;
                        map[i, j] = '.';
                    }
                    else if(map[i, j] == '$')
                    {
                        ghostX = i;
                        ghostY = j;
                        map[i, j] = '.';
                    }
                    else if(map [i,j]== ' ')
                    {
                        map[i, j] = '.';
                        allDots++;
                    }
                }
            }
            return map;
        }
    }
}