"""
Per-connection session config using Python contextvars.
Each SSE connection sets its own Frappe credentials, isolated from other users.
Falls back to .env values if no per-session config is set (local stdio mode).
"""

from contextvars import ContextVar
from dataclasses import dataclass


@dataclass
class SessionConfig:
    frappe_url: str
    api_key: str
    api_secret: str
    site_name: str = ""
    read_only_mode: bool = False
    request_timeout: int = 30


_session: ContextVar[SessionConfig | None] = ContextVar("frappe_session", default=None)


def set_session(config: SessionConfig) -> None:
    _session.set(config)


def get_session() -> SessionConfig | None:
    return _session.get()