import cv2 as cv
import numpy as np


def click_event(event, x, y, flags, params):
    if event == cv.EVENT_LBUTTONDOWN:
        # print(x, ' ', y)
        cv.circle(img, (int(x), int(y)), 10, [0, 255, 255], -1)
        cv.imshow('image', img)
        vertexes.append([x, y])
        if len(vertexes) == 4:
            add_img_in_area()


def add_img_in_area():
    # src_points = np.array([[0, 0], [bakery_w - 1, 0], [bakery_w - 1, bakery_h - 1], [0, bakery_h - 1]], dtype=float)
    dst_points = np.array(vertexes, dtype=float)
    

    vertexes.clear()


if __name__ == '__main__':
    vertexes = []
    img = cv.imread('../img/billboards.jpg')
    bakery = cv.imread('../img/bakery.jpg')
    bakery_h, bakery_w = bakery.shape[0:2]
    cv.imshow('image', img)
    cv.setMouseCallback('image', click_event)
    cv.waitKey(0)
    cv.destroyAllWindows()