#!/usr/bin/env python

import subprocess
import pathlib
import os
import logging
import asyncio


async def notify(level, message):
    # notify = desktop_notify.aio.Notify(level, message)
    # await notify.show()
    notify_cmd = ["backup/notify.sh", level, message]
    notify = subprocess.run(notify_cmd, capture_output=True)

def is_mountpoint(path):
    mountpoint_cmd = ["mountpoint", str(path)]
    logging.info(' '.join(mountpoint_cmd))
    check = subprocess.run(mountpoint_cmd, capture_output=True)
    if check.returncode != 0:  # not a mountpoint
        logging.error(check.stdout.decode().strip())
        return False
    else:
        logging.info(check.stdout.decode().strip())
        return True


async def main():
    logging.basicConfig(format='%(asctime)s %(levelname)s: %(message)s', level=logging.DEBUG)

    subvolumes_to_backup = ["home", "root"]
    logging.info(f"Backing up {', '.join(subvolumes_to_backup)}")
    btrfs_subvolume = "/btrfs"
    snapshot_subvolume = f"{btrfs_subvolume}/snapshots"
    snapshot_path = pathlib.Path(snapshot_subvolume)
    old_snapshots = os.listdir(snapshot_path)

    for snapshot in old_snapshots:
        delete_cmd = ["btrfs", "sub", "del", f"{snapshot_path}/{snapshot}"]
        logging.info(' '.join(delete_cmd))
        delete = subprocess.run(delete_cmd, capture_output=True)

    for subvolume in subvolumes_to_backup:
        snapshot_cmd = [
            "btrfs", "sub", "snap", "-r", f"{btrfs_subvolume}/{subvolume}", f"{snapshot_path}"]
        logging.info(' '.join(snapshot_cmd))
        create_new_snap = subprocess.run(snapshot_cmd, capture_output=True)

    backup_mountpoint = pathlib.Path("/mnt/53de8433-6394-408c-a856-5f3b9908f21f")
    snapshots = os.listdir(snapshot_path)

    if is_mountpoint(backup_mountpoint):
        for new_snapshot in snapshots:
            backup_cmd = ["rsync", "-av", "--delete",
                          f"{snapshot_path}/{new_snapshot}/",
                          f"{backup_mountpoint}/{new_snapshot}/"]
            logging.info(' '.join(backup_cmd))
            rsync = subprocess.run(backup_cmd, capture_output=True)
            await notify(f"{new_snapshot} backup successful", ' '.join(backup_cmd))
    else:
        await notify(f"{new_snapshot} backup failed", f"{backup_mountpoint} is not mounted")


if __name__ == "__main__":
    asyncio.run(main())