import cv2
from matplotlib import pyplot as plt

# Load the image
image = cv2.imread('../../mm_agents/stackoverflow.png')

# Convert to grayscale
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

# Apply adaptive thresholding to get a binary image
thresh = cv2.adaptiveThreshold(
    gray, 255, cv2.ADAPTIVE_THRESH_GAUSSIAN_C, cv2.THRESH_BINARY_INV, 11, 2
)

# Find contours
contours, _ = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

# Filter out contours that are not of cell size
# This is done by assuming that cells will have a relatively standard size
# The size filter is just a placeholder, real values depend on the actual image size
min_cell_size = 500
max_cell_size = 5000
cell_contours = [cnt for cnt in contours if min_cell_size < cv2.contourArea(cnt) < max_cell_size]

# Draw contours on the image
contour_output = image.copy()
cv2.drawContours(contour_output, cell_contours, -1, (0, 255, 0), 2)

# Display the image with cell contours
plt.figure(figsize=(12,6))
plt.imshow(cv2.cvtColor(contour_output, cv2.COLOR_BGR2RGB))
plt.title('Spreadsheet with Cell Contours')
plt.axis('off')
plt.show()