#!/usr/bin/env python
import os
import json
import rc_util
from pathlib import Path
from rc_rmq import RCRMQ
import rabbit_config as rcfg

task = "dir_verify"
dirs = rcfg.User_dirs

args = rc_util.get_args()
logger = rc_util.get_logger(args)

# Instantiate rabbitmq object
rc_rmq = RCRMQ({"exchange": "RegUsr", "exchange_type": "topic"})


def dir_verify(ch, method, properties, body):
    msg = json.loads(body)
    username = msg["username"]
    msg["task"] = task
    msg["success"] = True

    missing_dirs = []

    try:
        for d in dirs:
            path = Path(d) / msg["username"]

            if args.dry_run:
                logger.info(f"Checking dirs: {path}")

            else:
                if not path.exists():
                    # check if dirs exist and record any missing dirs
                    missing_dirs.append(path)
                    msg["success"] = False
                    msg["errmsg"] = f"Error: missing dirs {missing_dirs}"
                    logger.info(f"{path} does not exist")
                else:
                    # check existing dirs for correct ownership and permissions
                    status = os.stat(path)
                    mask = oct(status.st_mode)[-3:]
                    uid = str(status.st_uid)
                    gid = str(status.st_gid)
                    if mask != "700" or uid != msg["uid"] or gid != msg["gid"]:
                        msg["success"] = False
                        msg["errmsg"] = (
                            f"Error: dir {path} permissions or ownership are"
                            " wrong"
                        )

    except Exception:
        msg["success"] = False
        msg["errmsg"] = "Exception raised, check the logs for stack trace"
        logger.error("", exc_info=True)

    # send confirm message
    rc_rmq.publish_msg(
        {"routing_key": "confirm." + msg["queuename"], "msg": msg}
    )

    logger.debug(f"User {username} confirmation sent")

    ch.basic_ack(delivery_tag=method.delivery_tag)


logger.info(f"Start listening to queue: {task}")
rc_rmq.start_consume(
    {"queue": task, "routing_key": "verify.*", "cb": dir_verify}
)

logger.info("Disconnected")
rc_rmq.disconnect()