"""Faust environment variables."""
import os
from typing import Any, Sequence

from yarl import URL

__all__ = [
    "CONSOLE_PORT",
    "DATADIR",
    "DEBUG",
    "STRICT",
    "WEB_PORT",
    "WEB_BIND",
    "WEB_TRANSPORT",
    "WORKDIR",
]

PREFICES: Sequence[str] = ["FAUST_", "F_"]


def _getenv(name: str, *default: Any, prefices: Sequence[str] = PREFICES) -> Any:
    for prefix in prefices:
        try:
            return os.environ[prefix + name]
        except KeyError:
            pass
    if default:
        return default[0]
    raise KeyError(prefices[0] + name)


#: Enables debugging features (like blockdetection).
DEBUG: bool = bool(_getenv("DEBUG", False))

#: Working directory to change into at start.
WORKDIR: str = _getenv("WORKDIR", None)

#: Directory to keep the application state (tables, checkpoints, etc).
DATADIR: str = _getenv("DATADIR", "{conf.name}-data")

#: Blocking detection timeout
BLOCKING_TIMEOUT: float = float(_getenv("BLOCKING_TIMEOUT", "10.0"))
FORCE_BLOCKING_TIMEOUT: bool = bool(_getenv("FORCE_BLOCKING_TIMEOUT", ""))

#: :pypi:`aiomonitor` console default port
CONSOLE_PORT: int = int(_getenv("CONSOLE_PORT", 50101))

STRICT: bool = bool(_getenv("STRICT", False))

WEB_PORT: int = int(_getenv("WEB_PORT", "6066"))
WEB_BIND: str = _getenv("F_WEB_BIND", "0.0.0.0")  # nosec
WEB_TRANSPORT: URL = URL(_getenv("WEB_TRANSPORT", "tcp://"))