using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Gui
{
    public partial class Gui : Form
    {
        private Map map;

        public Gui()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            map = new Map();
            // 将map类数据显示到图形化界面上
            DisplayMap(map.GetMap(), map.TopPoints(), map.Points());
        }

        private void DisplayMap(int[,] map, int topPoints, int points)
        {
            // 在best label上显示topPoints
            best.Text = topPoints.ToString();
            // 在score上显示points
            score.Text = points.ToString();
            // 循环将不为0的tile设置为可见并显示数字
            for (int row = 0; row < map.GetLength(0); row++)
            {
                for (int col = 0; col < map.GetLength(1); col++)
                {
                    string str = $"tile{row}{col}";
                    if (map[row, col] != 0)
                    {
                        foreach (Control ctol in panel3.Controls)
                        {
                            if (ctol is Label && ctol.Name == str)
                            {
                                int num = map[row, col];
                                ctol.Visible = true;
                                ctol.Text = num.ToString();
                                if (num == 2 || num == 8 || num == 32)
                                {
                                    ctol.ForeColor = Color.Beige;
                                }
                                else if (num == 4 || num == 16 || num == 64)
                                {
                                    ctol.ForeColor = Color.Bisque;
                                }
                                else if (num == 128 || num == 512)
                                {
                                    ctol.ForeColor = Color.BlanchedAlmond;
                                }
                                else if (num == 256 || num == 1028)
                                {
                                    ctol.ForeColor = Color.BlueViolet;
                                }
                                else
                                {
                                    ctol.ForeColor = Color.Chocolate;
                                }
                            }
                        }
                    }
                    else
                    {
                        foreach (Control ctol in panel3.Controls)
                        {
                            if (ctol is Label && ctol.Name == str)
                            {
                                ctol.Visible = false;
                                ctol.Text = "0";
                            }
                        }
                    }
                }
            }
        }

        private void help_Click(object sender, EventArgs e)
        {
            MessageBox.Show(
                "HOW TO PLAY: Use your arrow keys to move the tiles. When two tiles with the same number touch, they merge into one!\n" +
                "使用键盘方向键移动方块，当两个有着同样数字的方块碰到一起时，合并为一块。",
                "Help",
                MessageBoxButtons.OK,
                MessageBoxIcon.Information);
        }

        private void Gui_KeyDown(object sender, KeyEventArgs e)
        {
            // 获取键盘输入并更新数据
            if (e.KeyCode == Keys.Up || e.KeyCode == Keys.W)
            {
                map.UpMap();
                UpdateMap(ref map);
                DisplayMap(map.GetMap(), map.TopPoints(), map.Points());
            }
            else if (e.KeyCode == Keys.Down || e.KeyCode == Keys.S)
            {
                map.DownMap();
                DisplayMap(map.GetMap(), map.TopPoints(), map.Points());
            }
            else if (e.KeyCode == Keys.Right || e.KeyCode == Keys.D)
            {
                map.RightMap();
                UpdateMap(ref map);
                DisplayMap(map.GetMap(), map.TopPoints(), map.Points());
            }
            else if (e.KeyCode == Keys.Left || e.KeyCode == Keys.A)
            {
                map.LeftMap();
                UpdateMap(ref map);
                DisplayMap(map.GetMap(), map.TopPoints(), map.Points());
            }
        }

        private void UpdateMap(ref Map map)
        {
            // 在任意随机位置添加随机数字，如果没有空位置，失败退出
            if (!map.ShuffleMap())
            {
                MessageBox.Show("End", "Sorry, you failed!", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
                NewGame();
            }
        }

        private void newGame_Click(object sender, EventArgs e)
        {
            NewGame();
        }

        private void NewGame()
        {
            // 将记录重写
            map.SetTopPoints();
            map = new Map();
            DisplayMap(map.GetMap(), map.TopPoints(), map.Points());
        }
    }
}

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

namespace Gui
{
    class Map
    {
        // 私有属性
        // points 记录得分
        // map 为二维数组
        // randomNums 存储可以自动生成的数字
        // random 随机类实例化
        // topPoints为有记录的最高得分
        // fileName是存放topPoints的文本文件
        private int[,] map;
        private int points;
        private int topPoints;
        private readonly string fileName = @".\topPoints.txt";
        private readonly int[] randomNums = { 2, 4, 8 };
        private readonly Random random = new Random();


        public Map()
        {
            // 构造函数
            InitializeMap();
        }

        public int[,] GetMap()
        {
            // 返回Map类的map数组属性
            return map;
        }

        public int TopPoints()
        {
            // 返回topPoints属性
            return topPoints;
        }

        public int Points()
        {
            return points;
        }

        public void InitializeMap()
        {
            // 初始化类
            points = 0;
            GetTopPoints();
            map = new int[4, 4];

            // 为map随机填充一个或两个数字
            for (int i = 0; i < 2; i++)
            {
                map[random.Next(0, 3), random.Next(0, 3)] = randomNums[random.Next(0, 2)];
            }
        }

        public void GetTopPoints()
        {
            // 打开filename，并读取topPoints
            FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate);
            StreamReader sr = new StreamReader(fs);
            string txt = sr.ReadLine();
            if (txt == "")
            {
                topPoints = 0;
            }
            else
            {
                topPoints = Convert.ToInt32(txt);
            }
            sr.Close();
            fs.Close();
        }

        public void SetTopPoints()
        {
            // 打开filename，并写入topPoints
            FileStream fs = new FileStream(fileName, FileMode.Create);
            StreamWriter sw = new StreamWriter(fs);
            string txt = topPoints.ToString();
            sw.WriteLine(txt);
            sw.Close();
            fs.Close();
        }

        public bool ShuffleMap()
        {
            // 添加数字
            ArrayList zerosList = new ArrayList();

            // 如果points超过topPoints
            if (points > topPoints)
            {
                topPoints = points;
            }

            // 如果没有空位置（0），则判定失败，返回false
            int zeros = ZerosInMap(ref zerosList);
            if (zeros == 0)
            {
                return false;
            }
            // 随机在空位置填充随机数
            int num = random.Next(0, zeros - 1);
            int[] list = (int[])(zerosList[num]);
            map[list[0], list[1]] = randomNums[random.Next(0, 3)];

            return true;
        }

        public int ZerosInMap(ref ArrayList zerosList)
        {
            // 查看map中有多少空位置，并记录空位置的索引信息到zerosList中
            int zeros = 0;

            for (int row = 0; row < map.GetLength(0); row++)
            {
                for (int col = 0; col < map.GetLength(1); col++)
                {
                    if (map[row, col] == 0)
                    {
                        zeros++;
                        zerosList.Add(new int[2] { row, col });
                    }
                }
            }

            return zeros;
        }

        public void TraverseMap()
        {
            // 遍历 
            // 显示分数
            ShowPoints();

            // 遍历显示map
            // 0表示空位置，用Black黑色输出，以达到隐身的效果
            // 非空位置，用DarkCyan深紫色输出
            for (int row = 0; row < map.GetLength(0); row++)
            {
                Console.Write("\t\t[");
                for (int col = 0; col < map.GetLength(1); col++)
                {
                    if (map[row, col] == 0)
                    {
                        Console.ForegroundColor = ConsoleColor.Black;
                        Console.Write($"0, ");
                        Console.ResetColor();
                    }
                    else
                    {
                        Console.ForegroundColor = ConsoleColor.DarkCyan;
                        Console.Write($"{map[row, col]}, ");
                        Console.ResetColor();
                    }
                }
                Console.WriteLine("\b\b]");
            }
        }

        public bool ReadKey()
        {
            // 获取键盘输入
            ConsoleKeyInfo keyInfo;

            // 键盘上箭头、下箭头、左箭头、右箭头
            // 按Q键退出，返回false
            Console.Write("Please enter a key[↑、↓、←、→]（q to quit）: ");
            keyInfo = Console.ReadKey();
            if (keyInfo.Key == ConsoleKey.UpArrow)
            {
                UpMap();
            }
            else if (keyInfo.Key == ConsoleKey.DownArrow)
            {
                DownMap();
            }
            else if (keyInfo.Key == ConsoleKey.LeftArrow)
            {
                LeftMap();
            }
            else if (keyInfo.Key == ConsoleKey.RightArrow)
            {
                RightMap();
            }
            else if (keyInfo.Key == ConsoleKey.Q)
            {
                return false;
            }

            return true;
        }

        public void UpMap()
        {
            // 上移
            for (int col = 0; col < map.GetLength(1); col++)
            {
                for (int row = map.GetLength(0) - 1; row > 0; row--)
                {
                    if (map[row, col] == 0)
                    {
                        continue;
                    }
                    else if (map[row - 1, col] == 0)
                    {
                        for (int r = row - 1; r < map.GetLength(0) - 1; r++)
                        {
                            map[r, col] ^= map[r + 1, col];
                            map[r + 1, col] ^= map[r, col];
                            map[r, col] ^= map[r + 1, col];
                        }

                    }
                    else if (map[row, col] == map[row - 1, col])
                    {
                        map[row - 1, col] *= 2;
                        points += map[row - 1, col];
                        map[row, col] = 0;
                        for (int r = row; r < map.GetLength(0) - 1; r++)
                        {
                            map[r, col] ^= map[r + 1, col];
                            map[r + 1, col] ^= map[r, col];
                            map[r, col] ^= map[r + 1, col];
                        }
                    }
                }
            }
        }

        public void DownMap()
        {
            // 下移
            for (int col = 0; col < map.GetLength(1); col++)
            {
                for (int row = 0; row < map.GetLength(0) - 1; row++)
                {
                    if (map[row, col] == 0)
                    {
                        continue;
                    }
                    else if (map[row + 1, col] == 0)
                    {
                        for (int r = row + 1; r > 0; r--)
                        {
                            map[r - 1, col] ^= map[r, col];
                            map[r, col] ^= map[r - 1, col];
                            map[r - 1, col] ^= map[r, col];
                        }
                    }
                    else if (map[row, col] == map[row + 1, col])
                    {
                        map[row + 1, col] *= 2;
                        points += map[row + 1, col];
                        map[row, col] = 0;
                        for (int r = row; r > 0; r--)
                        {
                            map[r - 1, col] ^= map[r, col];
                            map[r, col] ^= map[r - 1, col];
                            map[r - 1, col] ^= map[r, col];
                        }
                    }
                }
            }
        }

        public void LeftMap()
        {
            // 左移
            for (int row = 0; row < map.GetLength(0); row++)
            {
                for (int col = map.GetLength(1) - 1; col > 0; col--)
                {
                    if (map[row, col] == 0)
                    {
                        continue;
                    }
                    else if (map[row, col - 1] == 0)
                    {
                        for (int c = col - 1; c < map.GetLength(1) - 1; c++)
                        {
                            map[row, c] ^= map[row, c + 1];
                            map[row, c + 1] ^= map[row, c];
                            map[row, c] ^= map[row, c + 1];
                        }
                    }
                    else if (map[row, col] == map[row, col - 1])
                    {
                        map[row, col - 1] *= 2;
                        points += map[row, col - 1];
                        map[row, col] = 0;
                        for (int c = col; c < map.GetLength(1) - 1; c++)
                        {
                            map[row, c] ^= map[row, c + 1];
                            map[row, c + 1] ^= map[row, c];
                            map[row, c] ^= map[row, c + 1];
                        }
                    }
                }
            }
        }

        public void RightMap()
        {
            // 右移
            for (int row = 0; row < map.GetLength(0); row++)
            {
                for (int col = 0; col < map.GetLength(1) - 1; col++)
                {
                    if (map[row, col] == 0)
                    {
                        continue;
                    }
                    else if (map[row, col + 1] == 0)
                    {
                        for (int c = col + 1; c > 0; c--)
                        {
                            map[row, c - 1] ^= map[row, c];
                            map[row, c] ^= map[row, c - 1];
                            map[row, c - 1] ^= map[row, c];
                        }
                    }
                    else if (map[row, col] == map[row, col + 1])
                    {
                        map[row, col + 1] *= 2;
                        points += map[row, col + 1];
                        map[row, col] = 0;
                        for (int c = col; c > 0; c--)
                        {
                            map[row, c - 1] ^= map[row, c];
                            map[row, c] ^= map[row, c - 1];
                            map[row, c - 1] ^= map[row, c];
                        }
                    }
                }
            }
        }

        public void ExitMap()
        {
            // 退出
            Console.WriteLine("See you next time!");
        }

        public void FailMap()
        {
            // 失败
            Console.WriteLine("Sorry, you failed!");
        }

        public void ShowPoints()
        {
            if (points > topPoints)
                topPoints = points;
            // 显示分数
            Console.WriteLine($"{points} Points!\t\tTop Score: {topPoints}");
        }
    }
}