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;
using System.Threading;
namespace Pong
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
        }

        Graphics g;
        Graphics bbg;
        Bitmap bb;

        public int firstDisplacement = 0;
        public int secondDisplacement = 0;

        public Rectangle paddle1 ;
        public Rectangle paddle2 ;

        public Thread mainThread;
        Font transitionFont;

        private void Form1_Load(object sender, EventArgs e)
        {

        }
        public bool gameEnd = false;
        public void Game_Loop()
        {

            Rectangle ball = new Rectangle(this.Width / 2, this.Height / 2, 16, 16);
            Point velocity = new Point(1, 1);
            do
            {
                g.Clear(Color.Black);

                if (gameEnd == false)
                {
                    if (CheckCollision(paddle1, ball))
                    {
                        velocity.X *= -1;
                    }
                    if (CheckCollision(paddle2, ball))
                    {
                        velocity.X *= -1;
                    }
                    if (ball.Location.Y <= 0 || ball.Location.Y >= this.Height - ball.Height - 34)
                    {
                        velocity.Y *= -1;
                    }

                    if (firstDisplacement == 1)
                    {
                        paddle1.Y -= 3;
                    }
                    else if (firstDisplacement == 2)
                    {
                        paddle1.Y += 3;

                    }
                    else
                    {

                    }

                    if (secondDisplacement == 1)
                    {
                        paddle2.Y -= 3;

                    }
                    else if (secondDisplacement == 2)
                    {
                        paddle2.Y += 3;

                    }
                    else
                    {

                    }
                    ball.X += velocity.X;
                    ball.Y += velocity.Y;

                    if (ball.X > this.Width || ball.X < 0)
                    {
                        gameEnd = true;
                    }

                    g.FillRectangle(Brushes.White, paddle1);
                    g.FillRectangle(Brushes.White, paddle2);
                    g.FillEllipse(Brushes.White, ball);
                }
                else
                {
                    if (ball.X > this.Width) {
                        g.DrawString("Right lost!", transitionFont, Brushes.White, new Point(this.Width / 2 - 40, this.Height / 2 - 15));
                    }  else
                    {
                    g.DrawString("Left lost!", transitionFont, Brushes.White, new Point(this.Width / 2 - 40, this.Height / 2 - 15));

                    }
                }


                bbg.DrawImageUnscaled(bb, 0, 0);
            } while (true);
        }

        public bool CheckCollision(Rectangle mainREct, Rectangle Collider)
        {
            if (mainREct.Contains(Collider))
            {
                return true;
            } else
            {
                return false;
            }
        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.W)
            {
                firstDisplacement = 1;

            }
            if (e.KeyCode == Keys.Up)
            {
                secondDisplacement = 1;
            }
            if (e.KeyCode == Keys.S)
            {
                firstDisplacement = 2;
            }
            if (e.KeyCode == Keys.Down )
            {
                secondDisplacement = 2;
            }
        }

        private void Form1_KeyUp(object sender, KeyEventArgs e)
        {

            if (e.KeyCode == Keys.W) {
                firstDisplacement = 0;

            }
            if (e.KeyCode == Keys.Up)
            {
                secondDisplacement = 0;
            }
            if (e.KeyCode == Keys.S)
            {
               firstDisplacement = 0;
            }
            if (e.KeyCode == Keys.Down)
            {
               secondDisplacement = 0;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.Show();
            bb = new Bitmap(this.Width, this.Height, System.Drawing.Imaging.PixelFormat.Format32bppPArgb);
            g = Graphics.FromImage(bb);
            bbg = this.CreateGraphics();
            transitionFont = new Font("Arial", 24);


            paddle1 = new Rectangle(0, this.Height / 2 - 150, 20, 100);
            paddle2 = new Rectangle(this.Width - 35, this.Height / 2 - 150, 20, 100);
            mainThread = new Thread(Game_Loop);
            button1.Hide();
            this.Focus();
            mainThread.Start();
        }
    }
}