# This file is part of cloud-init. See LICENSE file for license information.

from cloudinit import helpers

from cloudinit import log as logging

from cloudinit import util

import os

import time

LOG = logging.getLogger()

WARNINGS = {

    'non_ec2_md': """

This system is using the EC2 Metadata Service, but does not appear to

be running on Amazon EC2 or one of cloud-init's known platforms that

provide a EC2 Metadata service. In the future, cloud-init may stop

reading metadata from the EC2 Metadata Service unless the platform can

be identified.

If you are seeing this message, please file a bug against

cloud-init at

   https://bugs.launchpad.net/cloud-init/+filebug?field.tags=dsid

Make sure to include the cloud provider your instance is

running on.

For more information see

  https://bugs.launchpad.net/bugs/1660385

After you have filed a bug, you can disable this warning by

launching your instance with the cloud-config below, or

putting that content into

   /etc/cloud/cloud.cfg.d/99-ec2-datasource.cfg

#cloud-config

datasource:

 Ec2:

  strict_id: false""",

    'dsid_missing_source': """

A new feature in cloud-init identified possible datasources for

this system as:

  {dslist}

However, the datasource used was: {source}

In the future, cloud-init will only attempt to use datasources that

are identified or specifically configured.

For more information see

  https://bugs.launchpad.net/bugs/1669675

If you are seeing this message, please file a bug against

cloud-init at

   https://bugs.launchpad.net/cloud-init/+filebug?field.tags=dsid

Make sure to include the cloud provider your instance is

running on.

After you have filed a bug, you can disable this warning by launching

your instance with the cloud-config below, or putting that content

into /etc/cloud/cloud.cfg.d/99-warnings.cfg

#cloud-config

warnings:

  dsid_missing_source: off""",

}

def _get_warn_dir(cfg):

    paths = helpers.Paths(

        path_cfgs=cfg.get('system_info', {}).get('paths', {}))

    return paths.get_ipath_cur('warnings')

def _load_warn_cfg(cfg, name, mode=True, sleep=None):

    # parse cfg['warnings']['name'] returning boolean, sleep

    # expected value is form of:

    #   (on|off|true|false|sleep)[,sleeptime]

    # boolean True == on, False == off

    default = (mode, sleep)

    if not cfg or not isinstance(cfg, dict):

        return default

    ncfg = util.get_cfg_by_path(cfg, ('warnings', name))

    if ncfg is None:

        return default

    if ncfg in ("on", "true", True):

        return True, None

    if ncfg in ("off", "false", False):

        return False, None

    mode, _, csleep = ncfg.partition(",")

    if mode != "sleep":

        return default

    if csleep:

        try:

            sleep = int(csleep)

        except ValueError:

            return default

    return True, sleep

def show_warning(name, cfg=None, sleep=None, mode=True, **kwargs):

    # kwargs are used for .format of the message.

    # sleep and mode are default values used if

    #   cfg['warnings']['name'] is not present.

    if cfg is None:

        cfg = {}

    mode, sleep = _load_warn_cfg(cfg, name, mode=mode, sleep=sleep)

    if not mode:

        return

    msg = WARNINGS[name].format(**kwargs)

    msgwidth = 70

    linewidth = msgwidth + 4

    fmt = "# %%-%ds #" % msgwidth

    topline = "*" * linewidth + "\n"

    fmtlines = []

    for line in msg.strip("\n").splitlines():

        fmtlines.append(fmt % line)

    closeline = topline

    if sleep:

        sleepmsg = "  [sleeping for %d seconds]  " % sleep

        closeline = sleepmsg.center(linewidth, "*") + "\n"

    util.write_file(

        os.path.join(_get_warn_dir(cfg), name),

        topline + "\n".join(fmtlines) + "\n" + topline)

    LOG.warning("%s%s\n%s", topline, "\n".join(fmtlines), closeline)

    if sleep:

        LOG.debug("sleeping %d seconds for warning '%s'", sleep, name)

        time.sleep(sleep)

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