"""Whoami endpoint: lets the single-page app detect the login state."""
from __future__ import annotations

from kaya.core import HttpContext
from kaya.openapi import operation

from ..app import app, oidc_mixin
from ..auth import display_name, require_auth
from ..http import send_json


@app.GET("/api/me")
@operation(summary="Current user",
           description="Returns the authenticated user's identity from the "
                       "session; 401 when not logged in.",
           tags=["auth"],
           responses={
               200: {"description": "The current user"},
               401: {"description": "Not logged in"},
           })
@require_auth
async def me(ctx: HttpContext) -> None:
    user = oidc_mixin.get_user(ctx)
    assert user is not None  # enforced by @require_auth
    await send_json(ctx, 200, {"sub": user.sub, "name": display_name(user)})