# This file is part of Gajim.
#
# Gajim 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; version 3 only.
#
# Gajim 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 Gajim.  If not, see <http://www.gnu.org/licenses/>.

from __future__ import annotations

from typing import Any

import json
import sys
from dataclasses import dataclass
from pathlib import Path

from packaging.requirements import Requirement
from packaging.version import Version as V

import gajim

from .helpers import is_shipped_plugin
from .plugins_i18n import _ as p_

BLOCKED_PLUGINS = [
    'appindicator_integration',
    'omemo',
    'plugin_installer',
    'syntax_highlight',
    'url_image_preview'
]

GAJIM_VERSION = V(gajim.__version__.split('+', 1)[0]).base_version


@dataclass(frozen=True, eq=True)
class PluginManifest:
    name: str
    short_name: str
    description: str
    authors: list[str]
    homepage: str
    config_dialog: bool
    version: V
    requirements: list[Requirement]
    platforms: list[str]
    path: Path | None = None

    def __hash__(self):
        return hash(f'{self.short_name}_{self.version}')

    @property
    def is_usable(self) -> bool:
        if self.short_name in BLOCKED_PLUGINS:
            return False

        if not self._check_requirements():
            return False

        platform = sys.platform
        if platform not in ('win32', 'darwin', 'linux'):
            # sys.platform can return an unknown amount of unix/linux derivates
            platform = 'others'

        return platform in self.platforms

    @property
    def is_shipped(self) -> bool:
        if self.path is None:
            return False
        return is_shipped_plugin(self.path)

    def get_remote_url(self, repository_url: str) -> str:
        filename = f'{self.short_name}_{self.version}.zip'
        return f'{repository_url}/{self.short_name}/{filename}'

    @classmethod
    def from_path(cls, path: Path) -> PluginManifest:
        manifest_path = path / 'plugin-manifest.json'
        if not manifest_path.exists():
            raise ValueError(f'Not a plugin path: {path}')

        if manifest_path.is_dir():
            raise ValueError(f'Not a plugin path: {path}')

        with manifest_path.open(encoding='utf8') as f:
            try:
                manifest = json.load(f)
            except Exception as error:
                raise ValueError(f'Error while parsing manifest: '
                                 f'{path}, {error}')
        return cls.from_manifest_json(manifest, manifest_path)

    def _check_requirements(self) -> bool:
        return any(GAJIM_VERSION in req.specifier for req in self.requirements)

    @classmethod
    def from_manifest_json(cls,
                           manifest: dict[str, Any],
                           path: Path | None = None) -> PluginManifest:
        return cls(
            name=manifest['name'],
            short_name=manifest['short_name'],
            description=p_(manifest['description']),
            authors=manifest['authors'],
            homepage=manifest['homepage'],
            config_dialog=manifest['config_dialog'],
            version=V(manifest['version']),
            requirements=[Requirement(r) for r in manifest['requirements']],
            platforms=manifest['platforms'],
            path=path.parent if path is not None else path)