import asyncio
import signal
import os
from .consts import RTSP_URL, VIDEO_OUT_FULL, VIDEO_OUT_ANAL

async def ffmpeg_start_recording(file):
    ffmpeg_args = [
        "-rtsp_transport", "tcp",
        "-timeout", "5000000",
        "-i", RTSP_URL,
        "-c:v", "libx264",
        "-pix_fmt", "yuv420p",
        "-preset", "fast",
        "-b:v", "1M",
        "-f", "mp4",
        "-an", file
    ]
    process = await asyncio.create_subprocess_exec('ffmpeg', *ffmpeg_args,
            stdout=asyncio.subprocess.DEVNULL,
            stderr=asyncio.subprocess.DEVNULL
            )
    return process

async def ffmpeg_stop_recording(process):
    # logger.debug("Inside ffmpeg_stop_recording")
    if process:
        # logger.debug(f"Sending SIGQUIT to recording_process: {process}")
        process.send_signal(signal.SIGQUIT)
        try:
            await asyncio.wait_for(process.wait(), timeout=2)
        except Exception as e:
            # logger.debug(f"Got an exception while waiting for the process to finish: {e}")
            process.kill()
            await process.wait()

async def ffmpeg_create_anal_file(file, anal_file):
    print("Inside ffmpeg_create_anal_file")
    print(f"VIDEO_OUT_FULL: {VIDEO_OUT_FULL}, VIDEO_OUT_ANAL: {VIDEO_OUT_ANAL}, file:{file}, anal_file: {anal_file} ")
    ffmpeg_args = [
       "-y", "-i", os.path.join(VIDEO_OUT_FULL, file), 
       "-vf", "scale=456:256,setsar=1",
       "-c:v", "libx264",
       "-pix_fmt", "yuv420p",
       "-an", "-movflags", "faststart",
       os.path.join(VIDEO_OUT_ANAL, anal_file)
    ]
    # logger.debug(f"writing to: {os.path.join(VIDEO_OUT_ANAL, anal_file)}")
    # logger.debug(f"calling ffmpeg with {' '.join(ffmpeg_args)}")
    process = await asyncio.create_subprocess_exec('ffmpeg', *ffmpeg_args,
        stdout=asyncio.subprocess.PIPE,
        stderr=asyncio.subprocess.PIPE
        )
    # monitor_task = asyncio.create_task(monitor_process(process))
    # monitor_task.add_done_callback(
    #     lambda task: asyncio.create_task(cb_completed(row_id, anal_file))
    #     )

    stdout, stderr = await process.communicate()
    return stdout, stderr
    # logger.debug(f"Process: {process} ended with return code: {process.returncode}")
    # if stderr:
    #     logger.debug("stderr:")
    #     logger.debug(stderr.decode())
    # if stdout:
    #     logger.debug("stdout:")
    #     logger.debug(stdout.decode())