# This file is part of naxalnet.
# Copyright (C) 2021 The naxalnet Authors

# 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 3 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, see <http://www.gnu.org/licenses/>.

"""
network.py
----------

This submodule manages the systemd-networkd configuration.
TODO: Add more details
"""

from pathlib import Path
from shutil import copy
from dasbus.connection import SystemMessageBus
from naxalnet.config import args

NETWORKD_BUS = "org.freedesktop.network1"
NETWORKD_PATH = "/org/freedesktop/network1"


def copy_glob(directory: str, glob: str, destination: str) -> None:
    """copy files in directory matching the glob to destination"""
    match = Path(directory).glob(glob)
    for i in match:
        copy(i, destination)


class Networkd:
    """control systemd-networkd"""

    def __init__(self, bus=SystemMessageBus()):
        self._bus = bus
        self.proxy_reload()
        self.files = []
        self.variables = {"batdev": "bat0", "bridgedev": "bridge0"}

    def proxy_reload(self) -> None:
        """reload the proxy"""
        self.proxy = self._bus.get_proxy(NETWORKD_BUS, NETWORKD_PATH)

    def add_config(self, name: str) -> None:
        """add config file to runtime directory and reload networkd"""
        text = Path(name).read_text(encoding="utf-8")
        contents = text.format(**self.variables)
        self.files.append(name)
        Path(args.networkd_runtime_dir + "/" + name).write_text(
            contents, encoding="utf-8"
        )