143 lines
5.2 KiB
Python
143 lines
5.2 KiB
Python
"""Application factory and dependency wiring."""
|
|
|
|
from collections.abc import AsyncIterator
|
|
from contextlib import asynccontextmanager
|
|
from pathlib import Path
|
|
|
|
import httpx
|
|
import httpx2
|
|
import structlog
|
|
from anthropic import AsyncAnthropic
|
|
from fastapi import FastAPI
|
|
from fastapi.staticfiles import StaticFiles
|
|
|
|
from app.adapters.anthropic.llm import AnthropicRecommender
|
|
from app.adapters.spotify.auth import TokenSet, refresh_access_token
|
|
from app.adapters.spotify.client import SpotifyClient
|
|
from app.adapters.spotify.errors import SpotifyError
|
|
from app.adapters.spotify.session import PendingLogins, SessionStore, SpotifySession
|
|
from app.api.recommendations import router as recommendations_router
|
|
from app.api.routes import router
|
|
from app.config import AppMode, Settings, settings
|
|
from app.observability.logging import configure_logging
|
|
from app.observability.timing import RequestTimingMiddleware
|
|
from app.pipeline.orchestrator import RecommendationPipeline
|
|
|
|
FRONTEND_DIST = Path(__file__).parent / "static"
|
|
|
|
|
|
def create_app(
|
|
application_settings: Settings | None = None,
|
|
http_transport: httpx2.AsyncBaseTransport | None = None,
|
|
anthropic_http_client: httpx.AsyncClient | None = None,
|
|
) -> FastAPI:
|
|
"""Build the FastAPI app: API routes plus the built SPA on one port."""
|
|
active_settings = application_settings or settings
|
|
configure_logging(active_settings.app_mode)
|
|
|
|
@asynccontextmanager
|
|
async def lifespan(application: FastAPI) -> AsyncIterator[None]:
|
|
_validate_live_settings(active_settings)
|
|
async with httpx2.AsyncClient(
|
|
timeout=active_settings.spotify_timeout_seconds,
|
|
transport=http_transport,
|
|
) as http:
|
|
application.state.http = http
|
|
application.state.session_store = SessionStore()
|
|
application.state.pending_logins = PendingLogins()
|
|
application.state.settings = active_settings
|
|
application.state.seed_session_id = None
|
|
anthropic_client = AsyncAnthropic(
|
|
api_key=active_settings.anthropic_api_key or "unused-demo-key",
|
|
timeout=active_settings.llm_timeout_seconds,
|
|
http_client=anthropic_http_client,
|
|
)
|
|
application.state.anthropic = anthropic_client
|
|
application.state.recommendation_pipeline = RecommendationPipeline(
|
|
AnthropicRecommender(anthropic_client, active_settings),
|
|
active_settings,
|
|
)
|
|
|
|
def spotify_client_factory(session: SpotifySession) -> SpotifyClient:
|
|
return SpotifyClient(http, session, active_settings)
|
|
|
|
application.state.spotify_client_factory = spotify_client_factory
|
|
if (
|
|
active_settings.app_mode is AppMode.LIVE
|
|
and active_settings.spotify_seed_refresh_token
|
|
):
|
|
try:
|
|
application.state.seed_session_id = await _install_seed_session(
|
|
http,
|
|
application.state.session_store,
|
|
active_settings,
|
|
)
|
|
except (SpotifyError, ValueError) as error:
|
|
structlog.get_logger().warning(
|
|
"seed_session_install_failed",
|
|
error_type=type(error).__name__,
|
|
)
|
|
try:
|
|
yield
|
|
finally:
|
|
await anthropic_client.close()
|
|
|
|
app = FastAPI(
|
|
title="discovery-by-llm",
|
|
docs_url=None,
|
|
redoc_url=None,
|
|
lifespan=lifespan,
|
|
)
|
|
app.add_middleware(RequestTimingMiddleware)
|
|
|
|
@app.get("/api/health")
|
|
def health() -> dict[str, str]:
|
|
return {"status": "ok", "mode": active_settings.app_mode}
|
|
|
|
app.include_router(router)
|
|
app.include_router(recommendations_router)
|
|
if FRONTEND_DIST.is_dir():
|
|
app.mount("/", StaticFiles(directory=FRONTEND_DIST, html=True), name="spa")
|
|
|
|
return app
|
|
|
|
|
|
app = create_app()
|
|
|
|
|
|
def _validate_live_settings(application_settings: Settings) -> None:
|
|
if application_settings.app_mode is not AppMode.LIVE:
|
|
return
|
|
if not application_settings.spotify_client_id:
|
|
raise RuntimeError("SPOTIFY_CLIENT_ID is required in live mode")
|
|
if not application_settings.anthropic_api_key:
|
|
raise RuntimeError("ANTHROPIC_API_KEY is required in live mode")
|
|
|
|
|
|
async def _install_seed_session(
|
|
http: httpx2.AsyncClient,
|
|
session_store: SessionStore,
|
|
application_settings: Settings,
|
|
) -> str:
|
|
tokens = await refresh_access_token(
|
|
http,
|
|
client_id=application_settings.spotify_client_id,
|
|
tokens=TokenSet(
|
|
access_token="seed-bootstrap",
|
|
refresh_token=application_settings.spotify_seed_refresh_token,
|
|
expires_at=0.0,
|
|
),
|
|
)
|
|
bootstrap_session = SpotifySession(tokens=tokens, account_id="", display_name="")
|
|
current_user = await SpotifyClient(
|
|
http,
|
|
bootstrap_session,
|
|
application_settings,
|
|
).fetch_current_user()
|
|
return session_store.create(
|
|
SpotifySession(
|
|
tokens=bootstrap_session.tokens,
|
|
account_id=current_user.account_id,
|
|
display_name=current_user.display_name,
|
|
)
|
|
)
|