"""

Application configuration driven by the ENV environment variable.

- development: local Fernet key file (legacy behavior, e.g. C: drive on Windows)

- production: ENCRYPTION_KEY from environment (Railway)

"""

from __future__ import annotations

import os

from pathlib import Path

# ---------------------------------------------------------------------------

# Environment

# ---------------------------------------------------------------------------

ENV: str = os.getenv("ENV", "development").strip().lower()

IS_PRODUCTION: bool = ENV == "production"

IS_DEVELOPMENT: bool = ENV == "development"

if ENV not in ("production", "development"):

raise ValueError(f"ENV must be 'production' or 'development', got: {ENV!r}")

# ---------------------------------------------------------------------------

# Database

# ---------------------------------------------------------------------------

DATABASE_PATH: str = os.getenv(

"DATABASE_PATH",

str(Path(__file__).resolve().parent / "data" / "app.db"),

)

# ---------------------------------------------------------------------------

# Encryption (development = legacy local file; production = env var)

# ---------------------------------------------------------------------------

# Default path mirrors the typical Windows C: layout; on Linux use home dir.

_DEFAULT_DEV_KEY_PATH = (

"C:/.encryption_key"

if os.name == "nt"

else str(Path.home() / ".encryption_key")

)

DEV_ENCRYPTION_KEY_PATH: str = os.getenv(

"DEV_ENCRYPTION_KEY_PATH",

_DEFAULT_DEV_KEY_PATH,

)

# Production master key (Railway / cloud)

ENCRYPTION_KEY: str | None = os.getenv("ENCRYPTION_KEY")

# ---------------------------------------------------------------------------

# Streamlit Authenticator (cookie signing)

# ---------------------------------------------------------------------------

AUTH_COOKIE_NAME: str = os.getenv("AUTH_COOKIE_NAME", "app_auth_cookie")

AUTH_COOKIE_KEY: str = os.getenv(

"AUTH_COOKIE_KEY",

"change-this-cookie-signing-key-in-production",

)

AUTH_COOKIE_EXPIRY_DAYS: float = float(os.getenv("AUTH_COOKIE_EXPIRY_DAYS", "30"))