"""Filesystem paths and process-level constants.

Every path is overridable through the environment so the test suite can point the
whole application at a tmpdir without touching the real media tree.
"""

from __future__ import annotations

import os
from pathlib import Path


def _path(env: str, default: str) -> Path:
    return Path(os.environ.get(env, default))


STATE_DIR = _path("YTA_STATE_DIR", "/var/lib/youtube-automate")
MEDIA_ROOT = _path("YTA_MEDIA_ROOT", "/disks/Plex/YouTube")

DB_PATH = _path("YTA_DB_PATH", str(STATE_DIR / "subs.db"))
LOCK_PATH = _path("YTA_LOCK_PATH", str(STATE_DIR / "run.lock"))
VENV_BIN = _path("YTA_VENV_BIN", str(STATE_DIR / "venv" / "bin"))

WORK_DIR = MEDIA_ROOT / ".work"

# Files created by the service must stay group-readable by `mediaserver`, which is
# how Jellyfin reaches the tree. See specs.md §2.
UMASK = 0o002

# Media-adjacent sidecars we own and therefore may delete on reap.
SIDECAR_SUFFIXES = (".nfo", "-thumb.jpg", ".en.srt", ".info.json")

USER_AGENT = "youtube-automate/1.0"