"""
The rcctl service module for OpenBSD
"""

import os

import salt.utils.decorators as decorators
import salt.utils.path
from salt.exceptions import CommandNotFoundError

__func_alias__ = {"reload_": "reload"}

# Define the module's virtual name
__virtualname__ = "service"


def __virtual__():
    """
    rcctl(8) is only available on OpenBSD.
    """
    if __grains__["os"] == "OpenBSD" and os.path.exists("/usr/sbin/rcctl"):
        return __virtualname__
    return (
        False,
        "The openbsdpkg execution module cannot be loaded: "
        "only available on OpenBSD systems.",
    )


@decorators.memoize
def _cmd():
    """
    Return the full path to the rcctl(8) command.
    """
    rcctl = salt.utils.path.which("rcctl")
    if not rcctl:
        raise CommandNotFoundError
    return rcctl


def _get_flags(**kwargs):
    """
    Return the configured service flags.
    """
    flags = kwargs.get("flags", __salt__["config.option"]("service.flags", default=""))
    return flags


def available(name):
    """
    Return True if the named service is available.

    CLI Example:

    .. code-block:: bash

        salt '*' service.available sshd
    """
    cmd = "{} get {}".format(_cmd(), name)
    if __salt__["cmd.retcode"](cmd, ignore_retcode=True) == 2:
        return False
    return True


def missing(name):
    """
    The inverse of service.available.
    Return True if the named service is not available.

    CLI Example:

    .. code-block:: bash

        salt '*' service.missing sshd
    """
    return not available(name)


def get_all():
    """
    Return all installed services.

    CLI Example:

    .. code-block:: bash

        salt '*' service.get_all
    """
    ret = []
    service = _cmd()
    for svc in __salt__["cmd.run"]("{} ls all".format(service)).splitlines():
        ret.append(svc)
    return sorted(ret)


def get_disabled():
    """
    Return what services are available but not enabled to start at boot.

    CLI Example:

    .. code-block:: bash

        salt '*' service.get_disabled
    """
    ret = []
    service = _cmd()
    for svc in __salt__["cmd.run"]("{} ls off".format(service)).splitlines():
        ret.append(svc)
    return sorted(ret)


def get_enabled():
    """
    Return what services are set to run on boot.

    CLI Example:

    .. code-block:: bash

        salt '*' service.get_enabled
    """
    ret = []
    service = _cmd()
    for svc in __salt__["cmd.run"]("{} ls on".format(service)).splitlines():
        ret.append(svc)
    return sorted(ret)


def start(name):
    """
    Start the named service.

    CLI Example:

    .. code-block:: bash

        salt '*' service.start <service name>
    """
    cmd = "{} -f start {}".format(_cmd(), name)
    return not __salt__["cmd.retcode"](cmd)


def stop(name):
    """
    Stop the named service.

    CLI Example:

    .. code-block:: bash

        salt '*' service.stop <service name>
    """
    cmd = "{} stop {}".format(_cmd(), name)
    return not __salt__["cmd.retcode"](cmd)


def restart(name):
    """
    Restart the named service.

    CLI Example:

    .. code-block:: bash

        salt '*' service.restart <service name>
    """
    cmd = "{} -f restart {}".format(_cmd(), name)
    return not __salt__["cmd.retcode"](cmd)


def reload_(name):
    """
    Reload the named service.

    CLI Example:

    .. code-block:: bash

        salt '*' service.reload <service name>
    """
    cmd = "{} reload {}".format(_cmd(), name)
    return not __salt__["cmd.retcode"](cmd)


def status(name, sig=None):
    """
    Return the status for a service, returns a bool whether the service is
    running.

    CLI Example:

    .. code-block:: bash

        salt '*' service.status <service name>
    """
    if sig:
        return bool(__salt__["status.pid"](sig))

    cmd = "{} check {}".format(_cmd(), name)
    return not __salt__["cmd.retcode"](cmd, ignore_retcode=True)


def enable(name, **kwargs):
    """
    Enable the named service to start at boot.

    flags : None
        Set optional flags to run the service with.

    service.flags can be used to change the default flags.

    CLI Example:

    .. code-block:: bash

        salt '*' service.enable <service name>
        salt '*' service.enable <service name> flags=<flags>
    """
    stat_cmd = "{} set {} status on".format(_cmd(), name)
    stat_retcode = __salt__["cmd.retcode"](stat_cmd)

    flag_retcode = None
    # only (re)set flags for services that have an rc.d(8) script
    if os.path.exists("/etc/rc.d/{}".format(name)):
        flags = _get_flags(**kwargs)
        flag_cmd = "{} set {} flags {}".format(_cmd(), name, flags)
        flag_retcode = __salt__["cmd.retcode"](flag_cmd)

    return not any([stat_retcode, flag_retcode])


def disable(name, **kwargs):
    """
    Disable the named service to not start at boot.

    CLI Example:

    .. code-block:: bash

        salt '*' service.disable <service name>
    """
    cmd = "{} set {} status off".format(_cmd(), name)
    return not __salt__["cmd.retcode"](cmd)


def disabled(name):
    """
    Return True if the named service is disabled at boot, False otherwise.

    CLI Example:

    .. code-block:: bash

        salt '*' service.disabled <service name>
    """
    cmd = "{} get {} status".format(_cmd(), name)
    return not __salt__["cmd.retcode"](cmd, ignore_retcode=True) == 0


def enabled(name, **kwargs):
    """
    Return True if the named service is enabled at boot and the provided
    flags match the configured ones (if any). Return False otherwise.

    name
        Service name

    CLI Example:

    .. code-block:: bash

        salt '*' service.enabled <service name>
        salt '*' service.enabled <service name> flags=<flags>
    """
    cmd = "{} get {} status".format(_cmd(), name)
    if not __salt__["cmd.retcode"](cmd, ignore_retcode=True):
        # also consider a service disabled if the current flags are different
        # than the configured ones so we have a chance to update them
        flags = _get_flags(**kwargs)
        cur_flags = __salt__["cmd.run_stdout"]("{} get {} flags".format(_cmd(), name))
        if format(flags) == format(cur_flags):
            return True
        if not flags:
            def_flags = __salt__["cmd.run_stdout"](
                "{} getdef {} flags".format(_cmd(), name)
            )
            if format(cur_flags) == format(def_flags):
                return True

    return False
