from dataclasses import dataclass
from pathlib import Path
import os


def _load_env_file() -> None:
    env_path = Path(__file__).resolve().parents[1] / ".env"
    if not env_path.exists():
        return

    for raw_line in env_path.read_text(encoding="utf-8").splitlines():
        line = raw_line.strip()
        if not line or line.startswith("#") or "=" not in line:
            continue

        key, value = line.split("=", 1)
        key = key.strip()
        value = value.strip().strip('"').strip("'")

        if key and key not in os.environ:
            os.environ[key] = value


_load_env_file()


def _as_bool(value: str | None, default: bool = False) -> bool:
    if value is None:
        return default
    return value.strip().lower() in {"1", "true", "yes", "on"}


@dataclass(frozen=True)
class Settings:
    app_name: str = os.getenv("APP_NAME", "QueryRoute Dashboard")
    environment: str = os.getenv("ENVIRONMENT", "development")
    debug: bool = _as_bool(os.getenv("DEBUG"), False)
    database_url: str = os.getenv("DATABASE_URL", "")
    database_url_direct: str = os.getenv("DATABASE_URL_DIRECT", "")
    jwt_secret_key: str = os.getenv("JWT_SECRET_KEY", "change-me-in-production")
    jwt_algorithm: str = os.getenv("JWT_ALGORITHM", "HS256")
    access_token_expire_minutes: int = int(
        os.getenv("ACCESS_TOKEN_EXPIRE_MINUTES", "60")
    )


settings = Settings()