import os
from pathlib import Path

from dotenv import load_dotenv

load_dotenv()

DATA_DIR = os.environ.get("DATA_DIR", "/data")
PORT = int(os.environ.get("PORT", "8000"))

_SINGLE_USER_VALUES = frozenset({"single_user", "single-user", "singleuser", "single"})


def parse_cookie_mode(raw: str) -> tuple[bool, bool]:
    """Read `COOKIE_SECURE` as a three-way mode → `(cookie_secure, single_user)`.

    - `true` (default): cookie-scoped Owners, `Secure` + persistent cookie.
    - `false`: cookie-scoped Owners over plain HTTP, memory-only cookie —
      browsers drop `Secure` cookies on HTTP, so the flag has to come off.
    - `single_user`: no cookie at all. Every request shares one Owner, so a
      test box or a local single-person deployment needs no session plumbing.
      Anyone who can reach the app gets that data — there is no separation
      left to enforce, which is the point.
    """
    value = raw.strip().lower()
    if value in _SINGLE_USER_VALUES:
        return False, True
    return value != "false", False


COOKIE_SECURE, SINGLE_USER = parse_cookie_mode(os.environ.get("COOKIE_SECURE", "true"))

# Outbound lookups (image search, driver-page search, image download). The only
# feature that leaves the box — set false for an air-gapped deployment and the
# UI hides every search control instead of timing out on each one.
WEB_SEARCH = os.environ.get("WEB_SEARCH", "true").strip().lower() != "false"

DB_PATH = str(Path(DATA_DIR) / "imptune.db")
DRIVERS_DIR = str(Path(DATA_DIR) / "drivers")
ICONS_DIR = str(Path(DATA_DIR) / "icons")