from flask import Response
from flask import Flask
from flask import render_template
import threading
import argparse
import datetime
import time

lock = threading.Lock()

# initialize a flask object
app = Flask(__name__)

NULL = chr(0)
hiddev = None

def init():
    hiddev=open('/dev/hidg0', 'rb+')

def hidwrite(data):
    if hiddev is None:
        return False

    hiddev.write(data.encode())
    hiddev.flush()


def send_key(hidkey, shift, alt, ctlr, superkey):
    # TODO handle mod keys
    hidwrite(NULL*2+chr(hidkey)+NULL*5)
    hidwrite(NULL*8)


def get_hid_by_scancode(scancode):
    

@app.route("/")
def index():
	return render_template("hid.html")


@app.route("/hid/keyboard", methods=["POST"])
def keypress():
	return Response("Stisknuto ", mimetype = "text/plain")


# check to see if this is the main thread of execution
if __name__ == '__main__':
	# construct the argument parser and parse command line arguments
	ap = argparse.ArgumentParser()
	ap.add_argument("-i", "--ip", type=str, required=True,
	        help="ip address of the device")
	ap.add_argument("-o", "--port", type=int, required=True,
		help="ephemeral port number of the server (1024 to 65535)")
	ap.add_argument("-f", "--frame-count", type=int, default=32,
		help="# of frames used to construct the background model")
	args = vars(ap.parse_args())

        app.run(host=args["ip"], port=args["port"], debug=True,
		threaded=True, use_reloader=False)


        # Clean up
        if hiddev is not None:
            print("Closing hid")
            hiddev.close()