from fastapi import FastAPI, Request, Depends, HTTPException, status
from fastapi.security import OAuth2PasswordBearer
from QuoteGenerator import QuoteGenerator
from typing import Union
from pydantic import BaseModel
import time
import os

# API to key to validate the Referer
API_KEY = os.getenv('API_KEY')

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

# Function to check of the incoming API call is from valid host or not
def api_key_auth(api_key:str = Depends(oauth2_scheme)):
    if api_key != API_KEY:
        raise HTTPException(
            status_code = status.HTTP_401_UNAUTHORIZED,
            detail="Forbidden Access"
        )

class QuoteRequest(BaseModel):
    tags: Union[None, str]

app = FastAPI()

#Middleware to note time
@app.middleware("http")
async def note_response_time(request: Request, call_next):
    start_time = time.time()
    response = await call_next(request)
    process_time = time.time()
    print(f'Time taken = {process_time-start_time:.1f}s')
    return response

quote_generator = QuoteGenerator()
quote_generator.load_generator()

@app.post("/", dependencies=[Depends(api_key_auth)])
def root(request: Request):
    return {"message": "This is the website for quote-generator"}

@app.post("/generate_quote", dependencies=[Depends(api_key_auth)])
def generate_quote(req: QuoteRequest):
    print("Tags: ", req.tags)
    generated_quote_oup = quote_generator.generate_quote(req.tags)
    return {'quote': generated_quote_oup}