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"""
Wrapper for at(1) on Solaris-like systems

.. note::
    we try to mirror the generic at module
    where possible

:maintainer:    jorge schrauwen <sjorge@blackdot.be>
:maturity:      new
:platform:      solaris,illumos,smartso

.. versionadded:: 2017.7.0
"""

import datetime
import logging
import re
import time

import salt.utils.files
import salt.utils.path
import salt.utils.platform
import salt.utils.stringutils

log = logging.getLogger(__name__)
__virtualname__ = "at"


def __virtual__():
    """
    We only deal with Solaris' specific version of at
    """
    if not salt.utils.platform.is_sunos():
        return (False, "The at module could not be loaded: unsupported platform")
    if (
        not salt.utils.path.which("at")
        or not salt.utils.path.which("atq")
        or not salt.utils.path.which("atrm")
    ):
        return (False, "The at module could not be loaded: at command not found")
    return __virtualname__


def atq(tag=None):
    """
    List all queued and running jobs or only those with
    an optional 'tag'.

    CLI Example:

    .. code-block:: bash

        salt '*' at.atq
        salt '*' at.atq [tag]
        salt '*' at.atq [job number]
    """
    jobs = []

    res = __salt__["cmd.run_all"]("atq")

    if res["retcode"] > 0:
        return {"error": res["stderr"]}

    # No jobs so return
    if res["stdout"] == "no files in queue.":
        return {"jobs": jobs}

    # Jobs created with at.at() will use the following
    # comment to denote a tagged job.
    job_kw_regex = re.compile(r"^### SALT: (\w+)")

    # Split each job into a dictionary and handle
    # pulling out tags or only listing jobs with a certain
    # tag
    for line in res["stdout"].splitlines():
        job_tag = ""

        # skip header
        if line.startswith(" Rank"):
            continue

        # parse job output
        tmp = line.split()
        timestr = " ".join(tmp[1:5])
        job = tmp[6]
        specs = (
            datetime.datetime(*(time.strptime(timestr, "%b %d, %Y %H:%M")[0:5]))
            .isoformat()
            .split("T")
        )
        specs.append(tmp[7])
        specs.append(tmp[5])

        # make sure job is str
        job = str(job)

        # search for any tags
        atjob_file = f"/var/spool/cron/atjobs/{job}"
        if __salt__["file.file_exists"](atjob_file):
            with salt.utils.files.fopen(atjob_file, "r") as atjob:
                for line in atjob:
                    line = salt.utils.stringutils.to_unicode(line)
                    tmp = job_kw_regex.match(line)
                    if tmp:
                        job_tag = tmp.groups()[0]

        # filter on tags
        if not tag:
            jobs.append(
                {
                    "job": job,
                    "date": specs[0],
                    "time": specs[1],
                    "queue": specs[2],
                    "user": specs[3],
                    "tag": job_tag,
                }
            )
        elif tag and tag in [job_tag, job]:
            jobs.append(
                {
                    "job": job,
                    "date": specs[0],
                    "time": specs[1],
                    "queue": specs[2],
                    "user": specs[3],
                    "tag": job_tag,
                }
            )

    return {"jobs": jobs}


def atrm(*args):
    """
    Remove jobs from the queue.

    CLI Example:

    .. code-block:: bash

        salt '*' at.atrm <jobid> <jobid> .. <jobid>
        salt '*' at.atrm all
        salt '*' at.atrm all [tag]
    """

    if not args:
        return {"jobs": {"removed": [], "tag": None}}

    if args[0] == "all":
        if len(args) > 1:
            opts = list(list(map(str, [j["job"] for j in atq(args[1])["jobs"]])))
            ret = {"jobs": {"removed": opts, "tag": args[1]}}
        else:
            opts = list(list(map(str, [j["job"] for j in atq()["jobs"]])))
            ret = {"jobs": {"removed": opts, "tag": None}}
    else:
        opts = list(
            list(map(str, [i["job"] for i in atq()["jobs"] if i["job"] in args]))
        )
        ret = {"jobs": {"removed": opts, "tag": None}}

    # call atrm for each job in ret['jobs']['removed']
    for job in ret["jobs"]["removed"]:
        res_job = __salt__["cmd.run_all"](f"atrm {job}")
        if res_job["retcode"] > 0:
            if "failed" not in ret["jobs"]:
                ret["jobs"]["failed"] = {}
            ret["jobs"]["failed"][job] = res_job["stderr"]

    # remove failed from list
    if "failed" in ret["jobs"]:
        for job in ret["jobs"]["failed"]:
            ret["jobs"]["removed"].remove(job)

    return ret


def at(*args, **kwargs):  # pylint: disable=C0103
    """
    Add a job to the queue.

    The 'timespec' follows the format documented in the
    at(1) manpage.

    CLI Example:

    .. code-block:: bash

        salt '*' at.at <timespec> <cmd> [tag=<tag>] [runas=<user>]
        salt '*' at.at 12:05am '/sbin/reboot' tag=reboot
        salt '*' at.at '3:05am +3 days' 'bin/myscript' tag=nightly runas=jim
    """

    # check args
    if len(args) < 2:
        return {"jobs": []}

    # build job
    if "tag" in kwargs:
        stdin = "### SALT: {}\n{}".format(kwargs["tag"], " ".join(args[1:]))
    else:
        stdin = " ".join(args[1:])

    cmd_kwargs = {"stdin": stdin, "python_shell": False}
    if "runas" in kwargs:
        cmd_kwargs["runas"] = kwargs["runas"]
    res = __salt__["cmd.run_all"](f'at "{args[0]}"', **cmd_kwargs)

    # verify job creation
    if res["retcode"] > 0:
        if "bad time specification" in res["stderr"]:
            return {"jobs": [], "error": "invalid timespec"}
        return {"jobs": [], "error": res["stderr"]}
    else:
        jobid = res["stderr"].splitlines()[1]
        jobid = str(jobid.split()[1])
        return atq(jobid)


def atc(jobid):
    """
    Print the at(1) script that will run for the passed job
    id. This is mostly for debugging so the output will
    just be text.

    CLI Example:

    .. code-block:: bash

        salt '*' at.atc <jobid>
    """

    atjob_file = f"/var/spool/cron/atjobs/{jobid}"
    if __salt__["file.file_exists"](atjob_file):
        with salt.utils.files.fopen(atjob_file, "r") as rfh:
            return "".join(
                [salt.utils.stringutils.to_unicode(x) for x in rfh.readlines()]
            )
    else:
        return {"error": f"invalid job id '{jobid}'"}


def _atq(**kwargs):
    """
    Return match jobs list
    """

    jobs = []

    runas = kwargs.get("runas", None)
    tag = kwargs.get("tag", None)
    hour = kwargs.get("hour", None)
    minute = kwargs.get("minute", None)
    day = kwargs.get("day", None)
    month = kwargs.get("month", None)
    year = kwargs.get("year", None)
    if year and len(str(year)) == 2:
        year = f"20{year}"

    jobinfo = atq()["jobs"]
    if not jobinfo:
        return {"jobs": jobs}

    for job in jobinfo:

        if not runas:
            pass
        elif runas == job["user"]:
            pass
        else:
            continue

        if not tag:
            pass
        elif tag == job["tag"]:
            pass
        else:
            continue

        if not hour:
            pass
        elif f"{int(hour):02d}" == job["time"].split(":")[0]:
            pass
        else:
            continue

        if not minute:
            pass
        elif f"{int(minute):02d}" == job["time"].split(":")[1]:
            pass
        else:
            continue

        if not day:
            pass
        elif f"{int(day):02d}" == job["date"].split("-")[2]:
            pass
        else:
            continue

        if not month:
            pass
        elif f"{int(month):02d}" == job["date"].split("-")[1]:
            pass
        else:
            continue

        if not year:
            pass
        elif year == job["date"].split("-")[0]:
            pass
        else:
            continue

        jobs.append(job)

    if not jobs:
        note = "No match jobs or time format error"
        return {"jobs": jobs, "note": note}

    return {"jobs": jobs}


def jobcheck(**kwargs):
    """
    Check the job from queue.
    The kwargs dict include 'hour minute day month year tag runas'
    Other parameters will be ignored.

    CLI Example:

    .. code-block:: bash

        salt '*' at.jobcheck runas=jam day=13
        salt '*' at.jobcheck day=13 month=12 year=13 tag=rose
    """

    if not kwargs:
        return {"error": "You have given a condition"}

    return _atq(**kwargs)