from contextlib import asynccontextmanager
from pathlib import Path

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import FileResponse
from fastapi.staticfiles import StaticFiles
from starlette.middleware.sessions import SessionMiddleware

from app import auth
from app.config import settings
from app.routes import health, sync, tags
from app.scheduler import shutdown_scheduler, start_scheduler


@asynccontextmanager
async def lifespan(app: FastAPI):
    start_scheduler()
    try:
        yield
    finally:
        shutdown_scheduler()


app = FastAPI(title=settings.app_name, lifespan=lifespan)

app.add_middleware(
    SessionMiddleware,
    secret_key=settings.secret_key,
    same_site="lax",
    https_only=False,
)

if settings.frontend_origin:
    app.add_middleware(
        CORSMiddleware,
        allow_origins=[settings.frontend_origin],
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )

app.include_router(health.router)
app.include_router(auth.router)
app.include_router(sync.router)
app.include_router(tags.router)

STATIC_DIR = Path(__file__).parent / "static"
app.mount("/assets", StaticFiles(directory=STATIC_DIR / "assets"), name="assets")


@app.get("/")
async def index() -> FileResponse:
    return FileResponse(STATIC_DIR / "index.html")