from fastapi import FastAPI, WebSocket
from fastapi.templating import Jinja2Templates
from fastapi import Request
from fastapi.staticfiles import StaticFiles

from chain import full_chain

app = FastAPI()

templates = Jinja2Templates(directory="templates")
app.mount("/static", StaticFiles(directory="static"), name="static")


@app.get("/")
def home(request: Request):
    return templates.TemplateResponse("index.html", {"request": request})


@app.websocket("/ws")
async def websocket_endpoint(websocket: WebSocket):
    await websocket.accept()

    try:
        while True:
            message = await websocket.receive_text()
            await websocket.send_json({"type": "start"})
            async for chunk in full_chain.astream(message):
                await websocket.send_json({"type": "chunk", "data": chunk})
            await websocket.send_json({"type": "end"})
    except Exception:
        pass