import tkinter as tk
import random

stop_simulation = False

def estimate_pi(num_points):
    points_inside_circle = 0

    for _ in range(num_points):
        if stop_simulation:
            break

        x = random.uniform(0, 1)
        y = random.uniform(0, 1)

        distance = x**2 + y**2

        if distance <= 1:
            points_inside_circle += 1

    pi_estimate = 4 * points_inside_circle / num_points
    return pi_estimate

def draw_circle_and_square(canvas):
    # Draw square
    canvas.create_rectangle(100, 100, 300, 300)

    # Draw circle
    canvas.create_oval(100, 100, 300, 300, outline="blue")

def stop_simulation_func():
    global stop_simulation
    stop_simulation = True

def clear_canvas():
    global stop_simulation
    stop_simulation = True
    canvas.delete("all")
    draw_circle_and_square(canvas)

def start_simulation():
    global stop_simulation
    stop_simulation = False

    num_points = int(entry.get())

    # Clear canvas
    canvas.delete("all")

    # Draw circle and square
    draw_circle_and_square(canvas)

    # Draw points
    for _ in range(num_points):
        if stop_simulation:
            break

        x = random.randint(100, 300)
        y = random.randint(100, 300)
        distance = (x - 200) ** 2 + (y - 200) ** 2

        if distance <= 10000:
            canvas.create_oval(x, y, x, y, fill="green")
        else:
            canvas.create_oval(x, y, x, y, fill="red")

        canvas.update()

        if not stop_simulation:
            # Estimate pi and display result
            pi_value = estimate_pi(num_points)
            label_result.config(text=f"Estimated value of pi using {num_points} points: {pi_value}")

# Create the main window
root = tk.Tk()
root.title("Monte Carlo Pi Estimation App")

# Create GUI elements
label = tk.Label(root, text="Enter the number of points:")
label.pack()

entry = tk.Entry(root, justify="center")
entry.pack()

start_button = tk.Button(root, text="Start Simulation", command=start_simulation)
start_button.pack()

stop_button = tk.Button(root, text="Stop Simulation", command=stop_simulation_func)
stop_button.pack()

clear_button = tk.Button(root, text="Clear Points", command=clear_canvas)
clear_button.pack()

label_result = tk.Label(root, text="")
label_result.pack()

canvas = tk.Canvas(root, width=400, height=400)
canvas.pack()

# Draw circle and square initially
draw_circle_and_square(canvas)

# Run the main loop
root.mainloop()