import socket
import cv2
import pickle
import struct
import numpy

from PIL import ImageGrab


class Client:
    ENCODE_PARAM = [int(cv2.IMWRITE_JPEG_QUALITY), 90]

    def __init__(self, *address, ind=0, width=960, height=540):
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.connect(address)
        self.connection = self.sock.makefile('wb')

        self.ind = ind
        self.width = width
        self.height = height

    @property
    def camera(self):
        cam = cv2.VideoCapture(self.ind)
        cam.set(3, self.width)
        cam.set(4, self.height)
        return cam

    def capture_camera(self):
        while True:
            _, frame = self.camera.read()
            self.sock.sendall(self._pack_frame(frame))

    def capture_screen(self):
        while True:
            image = ImageGrab.grab((0, 0, self.width, self.height))
            frame = numpy.array(image)
            self.sock.sendall(self._pack_frame(frame))

    def _pack_frame(self, frame):
        _, frame = cv2.imencode('.jpg', frame, self.ENCODE_PARAM)
        data = pickle.dumps(frame, 0)

        return struct.pack('>L', len(data)) + data


# Example
def main():
    Client('localhost', 8485, width=1920, height=1080).capture_screen()


if __name__ == '__main__':
    main()