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

class EscapeFloor
{
    struct Player
    {
        public int X1;
        public int X2;
        public int Y1;
        public int Y2;
        public int Points;
        public string[] Skin;
    }
    struct PowerUps
    {
        public string Symbol;
        public int X;
        public int Y;
        public ConsoleColor Color;

        public PowerUps(string symbol, int x, int y, ConsoleColor color)
        {
            this.Symbol = symbol;
            this.X = x;
            this.Y = y;
            this.Color = color;
        }
    }

    static void Main()
    {
        int numberOfFloors = 30;
        Console.BufferHeight = Console.WindowHeight = numberOfFloors;
        Console.BufferWidth = Console.WindowWidth = 50;
        Random rng = new Random();
        StringBuilder floor = new StringBuilder();
        Player player1 = new Player();
        string scoreFileDir = Directory.GetCurrentDirectory() + @"\score.txt";
        string[] floors = new string[Console.WindowHeight + 1];

        int floorsLength = Console.BufferWidth - 20;
        int emptyRows = 3;

        PowerUps[] powerUp = new PowerUps[3];

        powerUp[0] = new PowerUps("@", 1, 1, ConsoleColor.Green);
        powerUp[1] = new PowerUps("$", 1, 1, ConsoleColor.Yellow);
        powerUp[2] = new PowerUps("!", 1, 1, ConsoleColor.Red);

        int fallingCounter = 0;
        bool hasFallen = false;
        bool isGameOver = false;
        int[] holePosition = new int[numberOfFloors];
        int[,] playfield = new int[Console.BufferHeight, Console.BufferWidth - 20];
        string[] difficulty = { "Easy", "Medium", "Hard" };
        string[] skin = { "_O_", " | ", @"/ \" };
        player1.Skin = skin;
        int holeWidth = 8;
        int holeX = 0;

        int floorsCounter = 0;

        int levelSpeed = 350;

        int currentPlayerRow = 0;

        /**/
        player1.X1 = playfield.GetLength(1) / 2; //start at the horizontal center of the playfield
        player1.X2 = player1.X1 + player1.Skin.Length - 1;
        player1.Y1 = playfield.GetLength(0) - 15;
        player1.Y2 = player1.Y1 + player1.Skin.Length - 1;
        /**/

        for (int i = 0; i < playfield.GetLength(0); i++)
        {
            Console.SetCursorPosition(playfield.GetLength(1), i);
            Console.Write("|");
        }

        while (!isGameOver)
        {

            for (int i = 1; i < player1.Skin.Length; i++)
            {
                for (int j = 0; j < player1.Skin.Length; j++)
                {
                    playfield[player1.Y1 + i, player1.X1 + j] = 2;
                }
            }

            //row generator
            if (floorsCounter % 4 == 0)
            {
                holeX = rng.Next(0, playfield.GetLength(1) - 5);
                for (int i = 0; i < playfield.GetLength(1); i++)
                {
                    if (i >= holeX && i < holeX + holeWidth)
                    {
                        playfield[playfield.GetLength(0) - 1, i] = 3;
                    }
                    else
                    {
                        playfield[playfield.GetLength(0) - 1, i] = 1;
                    }
                }
                floorsCounter = 0;
            }

            //rows moving
            for (int Y = 0; Y < playfield.GetLength(0); Y++)
            {
                for (int X = 0; X < playfield.GetLength(1); X++)
                {
                    //destroying the row when it reaches the top
                    if (playfield[0, X] != 0)
                    {
                        for (int i = 0; i < playfield.GetLength(1); i++)
                        {
                            playfield[0, X] = 0;
                            Console.SetCursorPosition(X, 0);
                            Console.Write(" ");
                        }
                    }
                    if (playfield[Y, X] == 3)
                    {
                        playfield[Y - 1, X] = 3;
                        playfield[Y, X] = 0;
                    }
                    if (playfield[Y, X] == 1)
                    {
                        Console.SetCursorPosition(X, Y - 1);
                        Console.Write("=");
                          playfield[Y - 1, X] = 1;
                        Console.SetCursorPosition(X, Y);
                        Console.Write(" ");
                        playfield[Y, X] = 0;
                        //print character
                        PrintCharacter(player1);
                    }
                     if (playfield[Y, X] == 0)
                     {
                         Console.SetCursorPosition(X, Y);
                         Console.Write(" ");
                     }

                }
            }

            floorsCounter++;
            Thread.Sleep(levelSpeed);

            //move through holes
            for (int i = 0; i < player1.Skin.Length; i++)
            {
                if (playfield[player1.Y2 + 1, player1.X1 + i] == 1 && player1.Y2 < 26)
                {
                    for (int j = 0; j < player1.Skin[0].Length; j++)
                    {
                        Console.SetCursorPosition(player1.X1 + j, player1.Y1 - 1);
                        Console.Write(" ");
                    }
                    player1.Y1--;
                    break;
                }
                else if (playfield[player1.Y2 + 1, player1.X1 + i] != 1 && player1.Y2 < 26)
                {
                    for (int j = 0; j < player1.Skin.Length; j++)
                    {
                        playfield[player1.Y1, player1.X1 + j] = 0;
                    }
                    player1.Y1++;
                    break;
                }
            }
            player1.Y2 = player1.Y1 + 2;

            if (playfield[player1.Y2 + 1, player1.X1] == 3 && playfield[player1.Y2 + 1, player1.X2] == 3)
            {
                player1.Points = player1.Points + 20;
            }

            if (Console.KeyAvailable == true)
            {
                ConsoleKeyInfo pressedKey = Console.ReadKey(true);
                while (Console.KeyAvailable) Console.ReadKey(true);

                if (pressedKey.Key == ConsoleKey.LeftArrow)
                {
                    //boundaries
                    if (player1.X1 - 1 >= 0 && playfield[player1.Y2 - 1, player1.X1 - 1] == 0)
                    {
                        player1.X1--;
                        player1.X2 = player1.X1 + player1.Skin.Length - 1;
                        for (int i = 0; i < player1.Skin.Length; i++)                           //extract to clear left or right side
                        {                                                                       //extract to clear left or right side
                            Console.SetCursorPosition(player1.X1, player1.Y1 + i);              //extract to clear left or right side
                            Console.Write(player1.Skin[i]);                                     //extract to clear left or right side
                            Console.SetCursorPosition(player1.X2, player1.Y1 + i);          //extract to clear left or right side
                            Console.Write(" ");                                                 //extract to clear left or right side
                            playfield[player1.Y1 + i, player1.X2 + 1] = 0;
                        }
                    }
                }
                else if (pressedKey.Key == ConsoleKey.RightArrow)
                {
                    //boundaries
                    if (player1.X2 + 1 != playfield.GetLength(1) && playfield[player1.Y2 - 1, player1.X2 + 1] == 0)
                    {
                        player1.X1++;
                        player1.X2 = player1.X1 + player1.Skin.Length - 1;
                        for (int i = 0; i < player1.Skin.Length; i++)
                        {
                            Console.SetCursorPosition(player1.X1, player1.Y1 + i);
                            Console.Write(player1.Skin[i]);
                            Console.SetCursorPosition(player1.X1 , player1.Y1 + i);
                            Console.Write(" ");
                            playfield[player1.Y1 + i, player1.X1 - 1] = 0;
                        }
                    }
                }
            }

            for (int i = 0; i < playfield.GetLength(0); i++)
            {
                Console.SetCursorPosition(playfield.GetLength(0), i);
                Console.ForegroundColor = ConsoleColor.White;
                Console.Write("|");
            }
            Console.SetCursorPosition(playfield.GetLength(1) + 2, 5); //row 5
            Console.Write("Score: {0}", player1.Points);
            Console.SetCursorPosition(playfield.GetLength(1) + 2, 15); //row 15
            Console.Write("Speed: {0}", levelSpeed);
            if (player1.Points < 200)
            {
                Console.SetCursorPosition(playfield.GetLength(1) + 2, 10); //row 10
                Console.ForegroundColor = ConsoleColor.Green;
                Console.Write("Difficulty: {0}     ", difficulty[0]);
                Console.ResetColor();
            }
            else if (player1.Points <= 400)
            {
                levelSpeed = 12;
                holeWidth = 5;
                Console.SetCursorPosition(playfield.GetLength(1) + 2, 10); //row 10
                Console.ForegroundColor = ConsoleColor.Yellow;
                Console.Write("Difficulty: {0}     ", difficulty[1]);
                Console.ResetColor();
            }
            else if (player1.Points >= 400)
            {
                levelSpeed = 100;
                holeWidth = 3;
                Console.SetCursorPosition(playfield.GetLength(1) + 2, 10); //row 10
                Console.ForegroundColor = ConsoleColor.Red;
                Console.Write("Difficulty: {0}     ", difficulty[2]);
                Console.ResetColor();
            }

            if (player1.Y1 == 0)
            {
                isGameOver = true;
            }


            player1.Points++;
        }/**/

        Console.Clear();
        Console.WriteLine("Game Over!");
        Console.WriteLine("Your score is: {0}", player1.Points);
        Console.Write("Your name: ");
        string name = Console.ReadLine();
        string score = player1.Points.ToString() + " - " + name;

        using (StreamWriter w = File.AppendText(scoreFileDir))
        {
                w.WriteLine(score);
        }
        Thread.Sleep(2000);
    }

    private static void PrintCharacter(Player player1)
    {
        for (int j = 0; j < player1.Skin.Length; j++)
        {
            Console.SetCursorPosition(player1.X1, player1.Y1 + j);
            Console.Write(player1.Skin[j]);
        }
    }
}