#!/usr/bin/env python3

# SaT: an XMPP client
# Copyright (C) 2009-2026 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""tools to help manipulating files"""

import os.path
from pathlib import Path

from libervia.backend.core.constants import xdg_config_home
from libervia.backend.core.log import getLogger

log = getLogger(__name__)


def get_unique_name(path):
    """Generate a path with a name not conflicting with existing file

    @param path(str, Path): path to the file to create
    @return (Path): unique path (can be the same as path if there is no conflict)
    """
    ori_path = path = Path(path)
    idx = 1
    while path.exists():
        path = ori_path.with_name(f"{ori_path.stem}_{idx}{ori_path.suffix}")
        idx += 1
    return path


def get_downloads_dir() -> Path:
    """Find XDG download dir."""
    dirs_file = xdg_config_home / "user-dirs.dirs"

    try:
        with dirs_file.open("r") as f:
            for line in f:
                if line.startswith("XDG_DOWNLOAD_DIR"):
                    path_str = line.split("=", 1)[1].strip().strip('"')
                    # We use "expandvars" to expand $HOME.
                    return Path(os.path.expandvars(path_str))
    except FileNotFoundError:
        pass
    except Exception as e:
        log.warning(f"Can't read XDG user directories: {e}")

    return Path.home() / "Downloads"