using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

namespace Mouse_Test
{
    public partial class Form1 : Form
    {
        private bool draw = false;
        private bool clearPoints = false;
        private bool drawOnlyOnMove = false;
        private bool connectDrawToLastPoint = false;
        private bool drawAutomatic = true;
        private Timer timer = new Timer();
        private IList<List<Point>> _paths = new List<List<Point>>();
        private List<Point> _currentPath = null; // Initialize to null
        private Random rnd = new Random();

        public Form1()
        {
            InitializeComponent();
            this.DoubleBuffered = true;

            timer.Interval = 10; // Set interval for smoother drawing
            timer.Tick += Timer_Tick;

            if (drawAutomatic)
            {
                _currentPath = new List<Point>();
                _paths.Add(_currentPath); // Initialize the path list
                timer.Start();
            }
        }

        private void Timer_Tick(object sender, EventArgs e)
        {
            if (_currentPath == null || _currentPath.Count == 0)
            {
                int xStart = rnd.Next(pictureBox1.Location.X, pictureBox1.Location.X + pictureBox1.Width);
                int yStart = rnd.Next(pictureBox1.Location.Y, pictureBox1.Location.Y + pictureBox1.Height);
                _currentPath = new List<Point> { new Point(xStart, yStart) };
                _paths.Add(_currentPath);
            }

            Point lastPoint = _currentPath[_currentPath.Count - 1];
            int x = lastPoint.X + rnd.Next(-20, 21);
            int y = lastPoint.Y + rnd.Next(-20, 21);

            if (x < pictureBox1.Location.X) x = pictureBox1.Location.X;
            if (x > pictureBox1.Location.X + pictureBox1.Width) x = pictureBox1.Location.X + pictureBox1.Width;
            if (y < pictureBox1.Location.Y) y = pictureBox1.Location.Y;
            if (y > pictureBox1.Location.Y + pictureBox1.Height) y = pictureBox1.Location.Y + pictureBox1.Height;

            Point randomPoint = new Point(x, y);
            _currentPath.Add(randomPoint);

            // Simulate random "mouse up" and "mouse down" events
            if (rnd.NextDouble() < 0.05) // 5% chance to lift the "pen"
            {
                _currentPath = new List<Point>(); // Lift the pen
                _paths.Add(_currentPath); // Start a new path
            }

            pictureBox1.Invalidate();
        }

        private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                if (clearPoints)
                {
                    _paths.Clear(); // Clear previous paths
                }

                if (_currentPath == null || _currentPath.Count == 0 || connectDrawToLastPoint)
                {
                    if (_currentPath == null || _currentPath.Count == 0)
                    {
                        _currentPath = new List<Point>();
                        _paths.Add(_currentPath);
                    }
                    AddPointAndInvalidate(e.Location, true); // Add the starting point and invalidate
                }
                else
                {
                    // Start a new path without connecting to the last point
                    _currentPath = new List<Point> { e.Location };
                    _paths.Add(_currentPath); // Add the new path to the list of paths
                    pictureBox1.Invalidate(); // Force a repaint
                }

                draw = true;
            }
        }

        private void pictureBox1_Paint(object sender, PaintEventArgs e)
        {
            Pen pen = new Pen(Color.Red, 5);
            foreach (var path in _paths)
            {
                if (path.Count > 1)
                {
                    e.Graphics.DrawLines(pen, path.ToArray());
                }
            }
        }

        private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
        {
            draw = false;
            pictureBox1.Invalidate(); // Ensure the points are drawn
        }

        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
        {
            if (draw && e.Button == MouseButtons.Left)
            {
                AddPointAndInvalidate(e.Location, true); // Add point and invalidate
            }

            if (drawOnlyOnMove)
            {
                AddPointAndInvalidate(e.Location, true); // Add point and invalidate
            }
        }

        private void AddPointAndInvalidate(Point point, bool invalidate)
        {
            if (_currentPath == null)
            {
                _currentPath = new List<Point>();
                _paths.Add(_currentPath);
            }

            _currentPath.Add(point);
            if (invalidate)
            {
                pictureBox1.Invalidate(); // Force a repaint
            }
        }
    }
}