"""Config from .env next to ctf_status.py; environment variables override it."""
from __future__ import annotations

import os
import sys
from pathlib import Path

CFG_KEYS = ("GITLAB_GROUP_URL", "GITLAB_TOKEN")
OPT_KEYS = ("HEDGEDOC_NOTE", "HEDGEDOC_TAGS", "TITLE",
            "CHALLS_REPO_URL", "CHALLS_PATH", "CHALLS_BRANCH")
# the names a plain `.env` tends to use for the same thing
ALIASES = {"GL_PAT": "GITLAB_TOKEN", "GITLAB_URL": "GITLAB_GROUP_URL"}
DEFAULT_TAGS = "Logistics, h4tum CTF 2026"
DEFAULT_TITLE = "CTF challenge tracking"
DEFAULT_CHALLS_PATH = "2026/challs.txt"


def load_env() -> dict:
    cfg = {}
    env_file = Path(__file__).parent.parent / ".env"  # the repo, next to ctf_status.py
    if env_file.exists():
        for line in env_file.read_text().splitlines():
            line = line.strip()
            if not line or line.startswith("#") or "=" not in line:
                continue
            k, v = line.split("=", 1)
            k = k.strip().upper()
            cfg.setdefault(ALIASES.get(k, k), v.strip().strip("'\""))
    for k in CFG_KEYS + OPT_KEYS + tuple(ALIASES):
        if os.environ.get(k):
            cfg[ALIASES.get(k, k)] = os.environ[k]
    missing = [k for k in CFG_KEYS if not cfg.get(k)]
    if missing:
        sys.exit(f"missing config: {', '.join(missing)} (see .env.example)")
    return cfg