# This is the bcfg2 support for systemd

"""This is systemd support."""

import Bcfg2.Client.Tools
import Bcfg2.Client.XML


class Systemd(Bcfg2.Client.Tools.SvcTool):
    """Systemd support for Bcfg2."""
    name = 'Systemd'
    __execs__ = ['/bin/systemctl']
    __handles__ = [('Service', 'systemd')]
    __req__ = {'Service': ['name', 'status']}

    def get_svc_name(self, service):
        """Append .service to name if name doesn't specify a unit type."""
        svc = service.get('name')
        if svc.endswith(('.service', '.socket', '.device', '.mount',
                         '.automount', '.swap', '.target', '.path',
                         '.timer', '.snapshot', '.slice', '.scope')):
            return svc
        else:
            return '%s.service' % svc

    def get_svc_command(self, service, action):
        return "/bin/systemctl %s %s" % (action, self.get_svc_name(service))

    def VerifyService(self, entry, _):
        """Verify Service status for entry."""
        if entry.get('status') == 'ignore':
            return True

        cmd = "/bin/systemctl status %s" % (self.get_svc_name(entry))
        rv = self.cmd.run(cmd)

        if 'Loaded: error' in rv.stdout:
            entry.set('current_status', 'off')
            return False
        elif 'Active: active' in rv.stdout:
            entry.set('current_status', 'on')
            return entry.get('status') == 'on'
        else:
            entry.set('current_status', 'off')
            return entry.get('status') == 'off'

    def InstallService(self, entry):
        """Install Service entry."""
        if entry.get('status') == 'on':
            rv = self.cmd.run(self.get_svc_command(entry, 'enable')).success
            rv &= self.cmd.run(self.get_svc_command(entry, 'start')).success
        else:
            rv = self.cmd.run(self.get_svc_command(entry, 'stop')).success
            rv &= self.cmd.run(self.get_svc_command(entry, 'disable')).success

        return rv