backend/api.py

import sys
import os

# add project root (E:\odisha_disaster_chatbot) to Python path
sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from backend.models import ChatRequest, ChatResponse   # in backend/
from src.chatbot import RAGChatBot

app = FastAPI(title="Odisha Disaster Management Chatbot")

# ✅ Allow frontend to talk to backend
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Initialize chatbot once (not per request)
bot = RAGChatBot()

@app.post("/chat", response_model=ChatResponse)
def chat(request: ChatRequest):
    answer = bot.chat(request.query)
    return ChatResponse(answer=answer)

@app.get("/")
def root():
    return {"message": "✅ Odisha Disaster Management Chatbot API is running"}