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# Copyright (C) 2009-2011 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
#
# Author: Marc Cluet <marc.cluet@canonical.com>
# Based on code by Scott Moser <scott.moser@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
#
# This file is part of cloud-init. See LICENSE file for license information.

"""Mcollective: Install, configure and start mcollective"""

import errno
import io
import logging

# Used since this can maintain comments
# and doesn't need a top level section
from configobj import ConfigObj

from cloudinit import subp, util
from cloudinit.cloud import Cloud
from cloudinit.config import Config
from cloudinit.config.schema import MetaSchema
from cloudinit.settings import PER_INSTANCE

PUBCERT_FILE = "/etc/mcollective/ssl/server-public.pem"
PRICERT_FILE = "/etc/mcollective/ssl/server-private.pem"
SERVER_CFG = "/etc/mcollective/server.cfg"

meta: MetaSchema = {
    "id": "cc_mcollective",
    "distros": ["all"],
    "frequency": PER_INSTANCE,
    "activate_by_schema_keys": ["mcollective"],
}  # type: ignore

LOG = logging.getLogger(__name__)


def configure(
    config,
    server_cfg=SERVER_CFG,
    pubcert_file=PUBCERT_FILE,
    pricert_file=PRICERT_FILE,
):
    # Read server.cfg (if it exists) values from the
    # original file in order to be able to mix the rest up.
    try:
        old_contents = util.load_binary_file(server_cfg, quiet=False)
        mcollective_config = ConfigObj(io.BytesIO(old_contents))
    except IOError as e:
        if e.errno != errno.ENOENT:
            raise
        else:
            LOG.debug(
                "Did not find file %s (starting with an empty config)",
                server_cfg,
            )
            mcollective_config = ConfigObj()
    for cfg_name, cfg in config.items():
        if cfg_name == "public-cert":
            util.write_file(pubcert_file, cfg, mode=0o644)
            mcollective_config["plugin.ssl_server_public"] = pubcert_file
            mcollective_config["securityprovider"] = "ssl"
        elif cfg_name == "private-cert":
            util.write_file(pricert_file, cfg, mode=0o600)
            mcollective_config["plugin.ssl_server_private"] = pricert_file
            mcollective_config["securityprovider"] = "ssl"
        else:
            if isinstance(cfg, str):
                # Just set it in the 'main' section
                mcollective_config[cfg_name] = cfg
            elif isinstance(cfg, (dict)):
                # Iterate through the config items, create a section if
                # it is needed and then add/or create items as needed
                if cfg_name not in mcollective_config.sections:
                    mcollective_config[cfg_name] = {}
                for o, v in cfg.items():
                    mcollective_config[cfg_name][o] = v
            else:
                # Otherwise just try to convert it to a string
                mcollective_config[cfg_name] = str(cfg)

    try:
        # We got all our config as wanted we'll copy
        # the previous server.cfg and overwrite the old with our new one
        util.copy(server_cfg, "%s.old" % (server_cfg))
    except IOError as e:
        if e.errno == errno.ENOENT:
            # Doesn't exist to copy...
            pass
        else:
            raise

    # Now we got the whole (new) file, write to disk...
    contents = io.BytesIO()
    mcollective_config.write(contents)
    util.write_file(server_cfg, contents.getvalue(), mode=0o644)


def handle(name: str, cfg: Config, cloud: Cloud, args: list) -> None:
    # If there isn't a mcollective key in the configuration don't do anything
    if "mcollective" not in cfg:
        LOG.debug(
            "Skipping module named %s, no 'mcollective' key in configuration",
            name,
        )
        return

    mcollective_cfg = cfg["mcollective"]

    # Start by installing the mcollective package ...
    cloud.distro.install_packages(["mcollective"])

    # ... and then update the mcollective configuration
    if "conf" in mcollective_cfg:
        configure(config=mcollective_cfg["conf"])

    # restart mcollective to handle updated config
    subp.subp(["service", "mcollective", "restart"], capture=False)