# Copyright (C) 2006 Jean-Marie Traissard <jim AT lapin.org>
#                    Junglecow J <junglecow AT gmail.com>
# Copyright (C) 2006-2014 Yann Leboulanger <asterix AT lagaule.org>
# Copyright (C) 2007 Brendan Taylor <whateley AT gmail.com>
# Copyright (C) 2008 Jonathan Schleifer <js-gajim AT webkeks.org>
# Copyright (C) 2018 Philipp Hörist <philipp AT hoerist.com>
#
# 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 typing import Dict  # pylint: disable=unused-import
from typing import List
from typing import Generator
from typing import Optional  # pylint: disable=unused-import
from typing import Tuple

import os
import sys
import tempfile
from pathlib import Path

import gajim
from gajim.common.i18n import _
from gajim.common.const import PathType, PathLocation
from gajim.common.types import PathTuple


def get(key: str) -> str:
    return _paths[key]


def get_plugin_dirs() -> List[str]:
    if gajim.IS_FLATPAK:
        return ['/app/plugins',
                _paths['PLUGINS_BASE']]
    return [_paths['PLUGINS_BASE'],
            _paths['PLUGINS_USER']]


def get_paths(type_: PathType) -> Generator[str, None, None]:
    for key, value in _paths.items():
        path_type = value[2]
        if type_ != path_type:
            continue
        yield _paths[key]


def override_path(*args, **kwargs):
    _paths.add(*args, **kwargs)


def set_separation(active: bool) -> None:
    _paths.profile_separation = active


def set_profile(profile: str) -> None:
    _paths.profile = profile


def set_config_root(config_root: str) -> None:
    _paths.custom_config_root = str(Path(config_root).resolve())


def init() -> None:
    _paths.init()


def create_paths() -> None:
    for path in get_paths(PathType.FOLDER):
        if not isinstance(path, Path):
            path_ = Path(path)

        if path_.is_file():
            print(_('%s is a file but it should be a directory') % path_)
            print(_('Gajim will now exit'))
            sys.exit()

        if not path_.exists():
            for parent_path in reversed(path_.parents):
                # Create all parent folders
                # don't use mkdir(parent=True), as it ignores `mode`
                # when creating the parents
                if not parent_path.exists():
                    print(('creating %s directory') % parent_path)
                    parent_path.mkdir(mode=0o700)
            print(('creating %s directory') % path_)
            path_.mkdir(mode=0o700)


class ConfigPaths:
    def __init__(self) -> None:
        self._paths = {}  # type: Dict[str, PathTuple]
        self.profile = ''
        self.profile_separation = False
        self.custom_config_root = None  # type: Optional[str]

        if os.name == 'nt':
            try:
                # Documents and Settings\[User Name]\Application Data\Gajim
                self.config_root = self.cache_root = self.data_root = \
                        os.path.join(os.environ['appdata'], 'Gajim')
            except KeyError:
                # win9x, in cwd
                self.config_root = self.cache_root = self.data_root = '.'
        else:
            expand = os.path.expanduser
            base = os.getenv('XDG_CONFIG_HOME')
            if base is None or base[0] != '/':
                base = expand('~/.config')
            self.config_root = os.path.join(base, 'gajim')
            base = os.getenv('XDG_CACHE_HOME')
            if base is None or base[0] != '/':
                base = expand('~/.cache')
            self.cache_root = os.path.join(base, 'gajim')
            base = os.getenv('XDG_DATA_HOME')
            if base is None or base[0] != '/':
                base = expand('~/.local/share')
            self.data_root = os.path.join(base, 'gajim')

        import pkg_resources
        basedir = pkg_resources.resource_filename("gajim", ".")

        source_paths = [
            ('DATA', os.path.join(basedir, 'data')),
            ('STYLE', os.path.join(basedir, 'data', 'style')),
            ('EMOTICONS', os.path.join(basedir, 'data', 'emoticons')),
            ('GUI', os.path.join(basedir, 'data', 'gui')),
            ('ICONS', os.path.join(basedir, 'data', 'icons')),
            ('HOME', os.path.expanduser('~')),
            ('PLUGINS_BASE', os.path.join(basedir, 'data', 'plugins')),
        ]

        for path in source_paths:
            self.add(*path)

    def __getitem__(self, key: str) -> str:
        location, path, _ = self._paths[key]
        if location == PathLocation.CONFIG:
            return os.path.join(self.config_root, path)
        if location == PathLocation.CACHE:
            return os.path.join(self.cache_root, path)
        if location == PathLocation.DATA:
            return os.path.join(self.data_root, path)
        return path

    def items(self) -> Generator[Tuple[str, PathTuple], None, None]:
        for key, value in self._paths.items():
            yield (key, value)

    def _prepare(self, path: str, unique: bool) -> str:
        if os.name == 'nt':
            path = path.capitalize()
        if self.profile:
            if unique or self.profile_separation:
                return '%s.%s' % (path, self.profile)
        return path

    def add(self,
            name: str,
            path: str,
            location: PathLocation = None,
            path_type: PathType = None,
            unique: bool = False) -> None:
        if path and location is not None:
            path = self._prepare(path, unique)
        self._paths[name] = (location, path, path_type)

    def init(self):
        if self.custom_config_root:
            self.config_root = self.custom_config_root
            self.cache_root = self.data_root = self.custom_config_root

        user_dir_paths = [
            ('TMP', tempfile.gettempdir()),
            ('MY_CONFIG', '', PathLocation.CONFIG, PathType.FOLDER),
            ('MY_CACHE', '', PathLocation.CACHE, PathType.FOLDER),
            ('MY_DATA', '', PathLocation.DATA, PathType.FOLDER),
        ]

        for path in user_dir_paths:
            self.add(*path)

        # These paths are unique per profile
        unique_profile_paths = [
            # Data paths
            ('SECRETS_FILE', 'secrets', PathLocation.DATA, PathType.FILE),
            ('MY_PEER_CERTS', 'certs', PathLocation.DATA, PathType.FOLDER),
            ('DEBUG', 'debug', PathLocation.DATA, PathType.FOLDER),
            ('PLUGINS_DATA', 'plugins_data', PathLocation.DATA, PathType.FOLDER),

            # Config paths
            ('CONFIG_FILE', 'config', PathLocation.CONFIG, PathType.FILE),
            ('PLUGINS_CONFIG_DIR',
             'pluginsconfig', PathLocation.CONFIG, PathType.FOLDER),
            ('MY_CERT', 'localcerts', PathLocation.CONFIG, PathType.FOLDER),
        ]

        for path in unique_profile_paths:
            self.add(*path, unique=True)

        # These paths are only unique per profile if the commandline arg
        # `separate` is passed
        paths = [
            # Data paths
            ('LOG_DB', 'logs.db', PathLocation.DATA, PathType.FILE),
            ('MY_CACERTS', 'cacerts.pem', PathLocation.DATA, PathType.FILE),
            ('PLUGINS_DOWNLOAD', 'plugins_download', PathLocation.CACHE, PathType.FOLDER),
            ('PLUGINS_USER', 'plugins', PathLocation.DATA, PathType.FOLDER),
            ('MY_EMOTS',
             'emoticons', PathLocation.DATA, PathType.FOLDER_OPTIONAL),
            ('MY_ICONSETS',
             'iconsets', PathLocation.DATA, PathType.FOLDER_OPTIONAL),
            ('MY_MOOD_ICONSETS',
             'moods', PathLocation.DATA, PathType.FOLDER_OPTIONAL),
            ('MY_ACTIVITY_ICONSETS',
             'activities', PathLocation.DATA, PathType.FOLDER_OPTIONAL),

            # Cache paths
            ('CACHE_DB', 'cache.db', PathLocation.CACHE, PathType.FILE),
            ('AVATAR', 'avatars', PathLocation.CACHE, PathType.FOLDER),
            ('BOB', 'bob', PathLocation.CACHE, PathType.FOLDER),

            # Config paths
            ('MY_THEME', 'theme', PathLocation.CONFIG, PathType.FOLDER),

        ]

        for path in paths:
            self.add(*path)


_paths = ConfigPaths()