import os
from fastapi import HTTPException
from fastapi.responses import HTMLResponse, FileResponse
from fastapi.staticfiles import StaticFiles


async def serve_index_html():
    """Serve the main HTML file"""
    index_path = os.path.join("public", "index.html")
    if not os.path.exists(index_path):
        raise HTTPException(status_code=404, detail="public/index.html not found.")
    return FileResponse(index_path)


def mount_static_files(app):
    """Mount static files"""
    app.mount("/", StaticFiles(directory="public", html=False), name="public_root_assets")