import asyncio
import os
import time
from datetime import datetime


def hhmmss(seconds):
    x = time.strftime('%H:%M:%S', time.gmtime(seconds))
    return x


async def screenshot(video, duration, sender):
    if os.path.exists(f'{sender}.jpg'):
        return f'{sender}.jpg'
    time_stamp = hhmmss(int(duration)/2)
    out = datetime.now().isoformat("-", "seconds")+".jpg"
    cmd = ["ffmpeg",
           "-ss",
           f"{time_stamp}",
           "-i",
           f"{video}"
           "-frames:v",
           "1",
           f"{out}"
           "-y"
           ]
    process = await asyncio.create_subprocess_exec(
        *cmd,
        stdout=asyncio.subprocess.PIPE,
        stderr=asyncio.subprocess.PIPE
    )
    stdout, stderr = await process.communicate()
    x = stderr.decode().strip()
    y = stdout.decode().strip()
    if os.path.isfile(out):
        return out
    else:
        None
    if os.path.isfile(out):
        return out
    else:
        None