import os
import logging
from fastapi.staticfiles import StaticFiles
from fastapi import Request
from fastapi.responses import FileResponse, JSONResponse
from ylff.server import app

logger = logging.getLogger(__name__)

# Mount static files (Next.js exported assets)
# We mount this AFTER the API routes defined in `ylff.server` so that API routes take precedence.
# However, FastAPI mounts match by path. "/" matches everything.
# So we need to be careful.
# But `StaticFiles` only handles requests if the file exists? No, it catches everything under mount path.
# So requests to /api/... might get caught if we mount at "/"?
# NO: FastAPI router matches first.
# Wait. `app = create_app()` includes routers.
# If we add mount("/") now, it acts as a catch-all?
# Actually, explicitly defined routes (like /api/v1/...) are checked before mounts?
# It depends on order... but `app.mount()` typically adds to the routes list.
# Since `app` is already created with API routes, appending mount("/") usually works as fallback.

STATIC_DIR = "/app/static"

if os.path.exists(STATIC_DIR):
    logger.info(f"Mounting static files from {STATIC_DIR}")
    
    # 1. Mount specific assets first
    app.mount("/_next", StaticFiles(directory=f"{STATIC_DIR}/_next"), name="next-static")
    
    # 2. Mount root for everything else (index.html, favicon, etc)
    # We must be careful not to shadow /api.
    # FastAPI docs say: "The order matters. Routes are matched in order."
    # Since API routes were added in `create_app` (imported above), they are already in `app.router.routes`.
    # `app.mount` adds to the end. So it effectively acts as fallback.
    
    app.mount("/", StaticFiles(directory=STATIC_DIR, html=True), name="root-static")
else:
    logger.warning(f"Static directory {STATIC_DIR} not found. Running in API-only mode.")

# Just to be safe, we can add a simple root endpoint ONLY if static dir is missing
# (which StaticFiles handles otherwise)

if __name__ == "__main__":
    import uvicorn
    uvicorn.run(app, host="0.0.0.0", port=7860)