import secrets
import sys
from os import getenv
from pathlib import Path

from dotenv import load_dotenv

load_dotenv()


def _required(key: str) -> str:
    val = getenv(key)
    if not val:
        print(f"missing required env var: {key}", file=sys.stderr)
        sys.exit(1)
    return val


# --- Admin bootstrap ----------------------------------------------------------
# On first boot the web service seeds this user as an admin in the database.
# Afterwards the user record in SQLite is authoritative: changing the hash in
# env does NOT rotate the DB password — use the /einstellungen UI.
AUTH_USERNAME: str = _required("AUTH_USERNAME")
AUTH_PASSWORD_HASH: str = _required("AUTH_PASSWORD_HASH")

# --- Session cookie -----------------------------------------------------------
SESSION_SECRET: str = getenv("SESSION_SECRET") or secrets.token_urlsafe(48)
SESSION_COOKIE_NAME: str = "lazyflat_session"
SESSION_MAX_AGE_SECONDS: int = int(getenv("SESSION_MAX_AGE_SECONDS", str(60 * 60 * 24 * 7)))
COOKIE_SECURE: bool = getenv("COOKIE_SECURE", "true").lower() in ("true", "1", "yes", "on")

# --- Internal service auth ----------------------------------------------------
INTERNAL_API_KEY: str = _required("INTERNAL_API_KEY")

# --- Apply service ------------------------------------------------------------
APPLY_URL: str = getenv("APPLY_URL", "http://apply:8000")
APPLY_TIMEOUT: int = int(getenv("APPLY_TIMEOUT", "600"))
APPLY_FAILURE_THRESHOLD: int = int(getenv("APPLY_FAILURE_THRESHOLD", "3"))

# --- Storage ------------------------------------------------------------------
DATA_DIR: Path = Path(getenv("DATA_DIR", "/data"))
DATA_DIR.mkdir(parents=True, exist_ok=True)
DB_PATH: Path = DATA_DIR / "lazyflat.sqlite"

# Retention (errors / audit / application forensics). Default 14 days.
RETENTION_DAYS: int = int(getenv("RETENTION_DAYS", "14"))
RETENTION_RUN_INTERVAL_SECONDS: int = int(getenv("RETENTION_RUN_INTERVAL_SECONDS", str(60 * 60)))

# --- Rate limiting ------------------------------------------------------------
LOGIN_RATE_LIMIT: int = int(getenv("LOGIN_RATE_LIMIT", "5"))
LOGIN_RATE_WINDOW_SECONDS: int = int(getenv("LOGIN_RATE_WINDOW_SECONDS", "900"))

# --- Email (system-wide SMTP for notifications) -------------------------------
SMTP_HOST: str = getenv("SMTP_HOST", "")
SMTP_PORT: int = int(getenv("SMTP_PORT", "587"))
SMTP_USERNAME: str = getenv("SMTP_USERNAME", "")
SMTP_PASSWORD: str = getenv("SMTP_PASSWORD", "")
SMTP_FROM: str = getenv("SMTP_FROM", "lazyflat@localhost")
SMTP_STARTTLS: bool = getenv("SMTP_STARTTLS", "true").lower() in ("true", "1", "yes", "on")

# --- App URL (used to build links in notifications) ---------------------------
PUBLIC_URL: str = getenv("PUBLIC_URL", "https://flat.lab.moritz.run")