from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
import chatbot


app = FastAPI()

model = None

# Add CORS middleware to allow any origin
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # Allows all origins
    allow_credentials=True,
    allow_methods=["*"],  # Allows all methods (GET, POST, etc.)
    allow_headers=["*"],  # Allows all headers
)

@app.get("/")
def root():
    return "Hello World"

# Define the Pydantic model to parse JSON input

from pydantic import BaseModel
class HistoryRequest(BaseModel):
    user: list[str]
    ai: list[str]

@app.post("/generate")
def generate_response(history: HistoryRequest):
    try:
        model
    except:
        model = chatbot.ChatBot()

    if type(model) != type(chatbot.ChatBot()):
        model = chatbot.ChatBot()
    
    response = model.generate_response(history)
    return response