# *****************************************************************************
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# 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, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# Module authors:
#   Markus Zolliker <markus.zolliker@psi.ch>
#
# *****************************************************************************

import os
from os.path import expanduser
from configparser import ConfigParser
from servicemanager.base import ServiceManager


class SingleManager(ServiceManager):
    """service to be started with systemd, only one per computer

    running as systemd (user level)
    """

    def systemd_service(self, service):
        """return the name of the systemd service"""
        raise NotImplementedError

    def treat_args(self, argdict, unknown=(), extra=()):
        if not argdict.get('ins'):
            argdict['ins'] = self.single_ins
        return super().treat_args(argdict, unknown, extra)

    def systemd_action(self, service, action):
        service_ports = self.get_ins_info(self.single_ins)
        services = list(service_ports) if service is None else [service]
        for service in services:
            print(f'systemctl --user {action} {self.systemd_service(service)}')
            os.system(f'systemctl --user {action} {self.systemd_service(service)}')

    def do_start(self, ins, service=None, cfg='', restart=False, wait=False, logger=None, opts=''):
        if wait:
            super().do_start(ins, service, cfg, False, True, logger, opts)
            return
        if restart:
            action = 'restart'
        else:
            action = 'start'
        self.systemd_action(service, action)

    def do_stop(self, ins, service=None, *args):
        self.systemd_action(service, 'stop')


class FeederManager(SingleManager):
    group = 'feeder'
    services = ('central', 'local')
    USAGE = """
    Usage:

      feeder start <instance> <service>
      feeder restart <instance> <service>
      feeder stop <instance> <service>
      feeder list [<instance>]

      %s
    """

    def __init__(self):
        parser = ConfigParser()
        parser.read(expanduser('~/.config/sehistory'))
        services = tuple(s for s in self.services if s in parser.sections())
        self.services = services
        super().__init__()

    def systemd_service(self, service):
        return f'{self.group}@{service}'


class SewebManager(SingleManager):
    group = 'seweb'
    services = ('',)
    USAGE = """
    Usage:

      seweb start <instance>
      seweb restart <instance>
      seweb stop <instance>
      seweb list [<instance>]

      %s
    """

    def systemd_service(self, service):
        return f'{self.group}@{self.single_ins}'