from fastapi import FastAPI
from fastapi.responses import HTMLResponse
from fastapi.staticfiles import StaticFiles
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
from pathlib import Path

app = FastAPI()

# CORS – allow embedding and external calls if needed
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_methods=["*"],
    allow_headers=["*"],
)

# FIX: Use absolute path for Hugging Face Spaces
STATIC_DIR = Path(__file__).parent / "static"
app.mount("/static", StaticFiles(directory=STATIC_DIR), name="static")


class ChatRequest(BaseModel):
    message: str


@app.get("/", response_class=HTMLResponse)
def serve_html():
    index_path = STATIC_DIR / "index.html"
    return index_path.read_text(encoding="utf-8")


@app.post("/chat")
def chat_endpoint(req: ChatRequest):
    user_message = req.message.strip()

    if not user_message:
        reply = "من فضلك اكتب رسالة للبدء."
    else:
        reply = (
            "هذا رد مؤقت — سيتم دمج نموذج الذكاء الاصطناعي لاحقًا.\n\n"
            f"لقد كتبت: \"{user_message}\""
        )

    return {"response": reply}