# vi: ts=4 expandtab
#
#    Author: Jeff Bauer <jbauer@rubic.com>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License version 3, as
#    published by the Free Software Foundation.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

import os

from cloudinit import util

# Note: see http://saltstack.org/topics/installation/


def handle(name, cfg, cloud, log, _args):
    # If there isn't a salt key in the configuration don't do anything
    if 'salt_minion' not in cfg:
        log.debug(("Skipping module named %s,"
                   " no 'salt_minion' key in configuration"), name)
        return

    salt_cfg = cfg['salt_minion']

    # Start by installing the salt package ...
    cloud.distro.install_packages(["salt-minion"])

    # Ensure we can configure files at the right dir
    config_dir = cloud.paths.join(False, salt_cfg.get("config_dir",
                                                      '/etc/salt'))
    util.ensure_dir(config_dir)

    # ... and then update the salt configuration
    if 'conf' in salt_cfg:
        # Add all sections from the conf object to /etc/salt/minion
        minion_config = os.path.join(config_dir, 'minion')
        minion_data = util.yaml_dumps(salt_cfg.get('conf'))
        util.write_file(minion_config, minion_data)

    # ... copy the key pair if specified
    if 'public_key' in salt_cfg and 'private_key' in salt_cfg:
        pki_dir = cloud.paths.join(False, salt_cfg.get('pki_dir',
                                                       '/etc/salt/pki'))
        with util.umask(077):
            util.ensure_dir(pki_dir)
            pub_name = os.path.join(pki_dir, 'minion.pub')
            pem_name = os.path.join(pki_dir, 'minion.pem')
            util.write_file(pub_name, salt_cfg['public_key'])
            util.write_file(pem_name, salt_cfg['private_key'])

    # restart salt-minion.  'service' will start even if not started.  if it
    # was started, it needs to be restarted for config change.
    util.subp(['service', 'salt-minion', 'restart'], capture=False)