from fastapi import FastAPI, HTTPException, UploadFile, File,Request,Depends,status,BackgroundTasks
from fastapi.security import OAuth2PasswordBearer
from pydantic import BaseModel
from typing import Optional
from uuid import uuid4
import os
from dotenv import load_dotenv
from rag import *
from fastapi.responses import StreamingResponse
import json
from prompt import *
from fastapi.middleware.cors import CORSMiddleware
import requests



load_dotenv()

## setup authorization
api_keys = [os.environ.get("FASTAPI_API_KEY")]

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")  # use token authentication


def api_key_auth(api_key: str = Depends(oauth2_scheme)):
    if api_key not in api_keys:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail="Forbidden"
        )

dev_mode = os.environ.get("DEV")

if dev_mode == "True":
    app = FastAPI()
else:
    app = FastAPI(dependencies=[Depends(api_key_auth)])

app.add_middleware(CORSMiddleware, allow_origins=["*"], allow_credentials=True, allow_methods=["*"], allow_headers=["*"])

# Pydantic model for the form data
class verify_response_model(BaseModel):
    response: str = Field(description="The response from the user to the question")
    answers: list[str] = Field(description="The possible answers to the question to test if the user read the entire book")
    question: str = Field(description="The question asked to the user to test if they read the entire book")

class UserInput(BaseModel):
    query: str
    stream: Optional[bool] = False
    messages: Optional[list[dict]] = []

#endpoinds

@app.post("/generate_sphinx")
async def generate_sphinx():
    try:
        sphinx : sphinx_output = generate_sphinx_response()
        return {"question": sphinx.question, "answers": sphinx.answers}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))
    
@app.post("/verify_sphinx")
async def verify_sphinx(response: verify_response_model):
    try:
        score : bool = verify_response(response.response, response.answers, response.question)
        return {"score": score}
    except Exception as e:
        raise HTTPException(status_code=500, detail=str(e))
    
@app.post("/generate")
async def generate(user_input: UserInput):
    try:
        print(user_input.stream,user_input.query)
        if user_input.stream:
            return StreamingResponse(generate_stream(user_input.query,user_input.messages,stream=True),media_type="application/json")
        else:
            return generate_stream(user_input.query,user_input.messages,stream=False)
    except Exception as e:
        return {"message": str(e)}