# Copyright (C) 2024–present  Loren Eteval & contributors <loren.eteval@proton.me>
#
# This file is part of Furious.
#
# 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 <https://www.gnu.org/licenses/>.

"""Persist and reconstruct user server configurations."""

from __future__ import annotations

from Furious.Frozenlib import *
from Furious.Interface import *
from Furious.Library.Encoder import *
from Furious.Plugins.Configuration import configFactoryFromAny

__all__ = ['UserServers']

registerAppSettings('Configuration')


class UserServer:
    """Represent user server."""

    remark: str
    config: str
    subsId: str


class UserServers(Mixins.CleanupOnExit, StorageFactory):
    # remark, config, subsId. (subsId corresponds to unique in user subscription)
    """Manage the persisted list of server configurations."""

    def __init__(self, *args, **kwargs):
        """Initialize the UserServers."""
        super().__init__(*args, **kwargs)

        def restore():
            """Restore the user servers."""
            try:
                return UJSONEncoder.decode(
                    PyBase64Encoder.decode(AppSettings.get('Configuration'))
                )
            except Exception:
                # Any non-exit exceptions

                return {'model': []}

        self._data = restore()
        self._list = list(
            configFactoryFromAny(model.pop('config', ''), index=index, **model)
            for index, model in enumerate(self._data['model'])
        )

    def sync(self):
        """Persist the current user servers data."""
        AppSettings.set(
            'Configuration',
            PyBase64Encoder.encode(
                UJSONEncoder.encode(
                    {'model': list(factory.toStorageObject() for factory in self._list)}
                ).encode()
            ),
        )

    def data(self) -> list[ConfigFactory]:
        # Shallow copy
        """Return the data managed by the user servers."""
        return self._list

    def cleanup(self):
        """Release resources owned by the user servers."""
        self.sync()