import os
import asyncio
from concurrent.futures import ThreadPoolExecutor
import requests
import gradio as gr


MAX_NEW_TOKENS = 256
TOKEN = os.environ.get("API_TOKEN", None)
URLS = [
    "https://api-inference.huggingface.co/models/google/flan-ul2",
    "https://api-inference.huggingface.co/models/google/flan-t5-xxl",
]


def fetch(session, text, api_url):
    model = api_url.split("/")[-1]
    response = session.post(api_url, json={"inputs": text, "parameters": {"max_new_tokens": MAX_NEW_TOKENS}})
    if response.status_code != 200:
        return model, None
    return model, response.json()


examples = [
    ["Please answer to the following question. Who is going to be the next Ballon d'or?"],
    ["Q: Can Barack Obama have a conversation with George Washington? Give the rationale before answering."],
    [
        "Summarize the following text: Peter and Elizabeth took a taxi to attend the night party in the city. While in the party, Elizabeth collapsed and was rushed to the hospital. Since she was diagnosed with a brain injury, the doctor told Peter to stay besides her until she gets well. Therefore, Peter stayed with her at the hospital for 3 days without leaving."
    ],
    ["Please answer the following question: What is the boiling point of water?"],
    ["Answer the following question by detailing your reasoning: Are Pokemons alive?"],
    ["Translate to German: How old are you?"],
    ["Generate a cooking recipe to make bolognese pasta:"],
    ["Answer the following yes/no question by reasoning step-by-step. Can you write a whole Haiku in a single tweet?"],
    [
        "Premise:  At my age you will probably have learnt one lesson. Hypothesis:  It's not certain how many lessons you'll learn by your thirties. Does the premise entail the hypothesis?"
    ],
    [
        "Answer the following question by reasoning step by step. The cafeteria had 23 apples. If they used 20 for lunch and bought 6 more, how many apples do they have?"
    ],
    [
        """Q: Roger has 5 tennis balls. He buys 2 more cans of tennis balls. Each can has 3 tennis balls. How many tennis balls does he have now?
A: Roger started with 5 balls. 2 cans of 3 tennis balls each is 6 tennis balls. 5 + 6 = 11. The answer is 11.
Q: A juggler can juggle 16 balls. Half of the balls are golf balls, and half of the golf balls are blue. How many blue golf balls are there?"""
    ],
]

title = "Flan UL2 vs Flan T5 XXL"
description = "This demo compares [Flan-T5-xxl](https://huggingface.co/google/flan-t5-xxl) and [Flan-UL2](https://huggingface.co/google/flan-ul2). Learn more about these models in their model card!"


async def inference(text):
    with ThreadPoolExecutor(max_workers=2) as executor:
        with requests.Session() as session:
            session.headers = {"Authorization": f"Bearer {TOKEN}"}
            # Initialize the event loop
            loop = asyncio.get_event_loop()
            tasks = [
                loop.run_in_executor(
                    executor, fetch, *(session, text, url)  # Allows us to pass in multiple arguments to `fetch`
                )
                for url in URLS
            ]

            # Initializes the tasks to run and awaits their results
            responses = [None, None]
            for (model, response) in await asyncio.gather(*tasks):
                if response is not None:
                    if model == "flan-ul2":
                        responses[0] = response[0]["generated_text"]
                    elif model == "flan-t5-xxl":
                        responses[1] = response[0]["generated_text"]
    return responses


io = gr.Interface(
    inference,
    gr.Textbox(lines=3),
    outputs=[gr.Textbox(lines=3, label="Flan T5-UL2"), gr.Textbox(lines=3, label="Flan T5-XXL")],
    title=title,
    description=description,
    examples=examples,
)
io.launch()