from contextlib import asynccontextmanager

from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse

from backend.database import engine
from backend.routers import health, subreddits, posts, comments, authors, analytics, digests, summaries


@asynccontextmanager
async def lifespan(app: FastAPI):
    yield
    await engine.dispose()


app = FastAPI(title="Reddit Monitor", lifespan=lifespan)

# API routes
app.include_router(health.router, prefix="/api/v1")
app.include_router(subreddits.router, prefix="/api/v1")
app.include_router(posts.router, prefix="/api/v1")
app.include_router(comments.router, prefix="/api/v1")
app.include_router(authors.router, prefix="/api/v1")
app.include_router(analytics.router, prefix="/api/v1")
app.include_router(digests.router, prefix="/api/v1")
app.include_router(summaries.router, prefix="/api/v1")


# SPA static file serving (only when frontend is built)
import os

static_dir = os.path.join(os.path.dirname(__file__), "..", "static")
if os.path.isdir(static_dir):
    app.mount("/assets", StaticFiles(directory=os.path.join(static_dir, "assets")), name="assets")

    @app.get("/{full_path:path}")
    async def serve_spa(full_path: str):
        return FileResponse(os.path.join(static_dir, "index.html"))