How do i work on venv remotely through Visual Studio Code on Raspberry Pi

Question

I'm trying very hard to get debugging to work remotely in VS Code. I'm working on a project that's meant to recognize dominant color of the picture from camera and send data to control RGB LED strip. The problem is i can't start debugging. I installed openCv following this tutorial: https://www.pyimagesearch.com/2018/09/26/install-opencv-4-on-your-raspberry-pi/ The opencv package i installed is linked to the venv "cv" that i created. Later on i installed pyserial package inside of this venv.

Anyways i can run the code remotely through command window and ssh. I just activate the envoirment through commands: "cd ~/.virtualenvs/; source cv/bin/activate" and then i can run it. It works perfectly fine but i want to have acces to debugger to make some tweaks in the code and make final version of it. When i try to run it or debug it through Visual studio code it doesn't work couse it can't import opencv package. My guess is it doesn't work inside virtualenv. I also can't run the code from raspberry locally. I only know how to activate virtual envoirnment through ssh.

I tried modyfing launch.json file in Visual Studio to put a bash command in it before it runs. It doesn't work either. Raspberry Pi and python is totally new for me. I have some experience with embedded C and STM32 but this is totally different and frustrating that i can't run my code in any other way then through ssh and i can't run debugger. Here's how i tried it:

{
    // Użyj funkcji IntelliSense, aby uzyskać informacje o możliwych atrybutach.
    // Najedź kursorem, aby wyświetlić opisy istniejących atrybutów.
    // Aby uzyskać więcej informacji, odwiedź stronę: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        
        {
            
            "command":"cd; source .virtualenvs/cv/bin/activate",
            "name": "Python: venv_cv",
            "type": "python",
            "request": "launch",
            "program": "${file}",
            "console": "integratedTerminal"
        }
    ],
    
}

Obviously it didn't work. I think making Visual studio to send this command before running debugger should work but most probably i just don't know how to do this.

And the code I'm trying to debug looks like this:

import cv2 as cv
import numpy as np
import serial
import picamera
import time

for i in range(10):
    with picamera.PiCamera() as camera:
        camera.resolution = (1280,720)
        camera.start_preview()
        time.sleep(0.1)
        camera.capture('testowe.jpg')
        camera.stop_preview()

    img = cv.imread('testowe.jpg')
    Z = img.reshape((-1,3))
    # convert to np.float32
    Z = np.float32(Z)
    # define criteria, number of clusters(K) and apply kmeans()
    criteria = (cv.TERM_CRITERIA_EPS + cv.TERM_CRITERIA_MAX_ITER, 5, 1.0)
    K = 8
    ret,label,center=  cv.kmeans(Z,K,None,criteria,1,cv.KMEANS_RANDOM_CENTERS)
    # Now convert back into uint8, and make original image
    center = np.uint8(center)
    #res = center[label.flatten()]
    #res2 = res.reshape((img.shape))
    #cv.imshow('res2',res2)
    #cv.waitKey(0)
   # cv.destroyAllWindows()
    print("\r\nCentroidy", center[2,2])
    print("\r\nCentroidy", center[2])


    ser = serial.Serial('/dev/rfcomm0')  # open serial port
    ser.write(b'R000G000B000\r\n')
    ser.close()  

As i mentioned it does work, but the problem is i can't run the debugger inside the virtual envoirnment and i can't run it in any other way then through ssh. When i try to debug it the error is "Import "cv2" could not be resolved". I would be really grateful if someone showed me a way how to make it debug inside the virtual env. It's my first project that I'm using Raspberry Pi and python, and especially venv so i hope you can explain it in a simple manner. Not being able to access the debugger and to run the code easily is frustrating. Thanks!