import pprint
import subprocess
from threading import Thread

import gradio as gr
from optimum.intel.openvino import OVModelForSeq2SeqLM
from transformers import AutoTokenizer, TextIteratorStreamer

result = subprocess.run(["lscpu"], text=True, capture_output=True)
pprint.pprint(result.stdout)

# original_model_id = "declare-lab/flan-alpaca-xl"
original_model_id = "declare-lab/flan-alpaca-large"
model_id = f"helenai/{original_model_id.replace('/','-')}-ov"

model = OVModelForSeq2SeqLM.from_pretrained(model_id)
tokenizer = AutoTokenizer.from_pretrained(model_id)


def run_generation(user_text, top_p, temperature, top_k, max_new_tokens):
    # Get the model and tokenizer, and tokenize the user text.
    model_inputs = tokenizer([user_text], return_tensors="pt")

    # Start generation on a separate thread, so that we don't block the UI. The text is pulled from the streamer
    # in the main thread. Adds timeout to the streamer to handle exceptions in the generation thread.
    streamer = TextIteratorStreamer(
        tokenizer, timeout=10.0, skip_prompt=True, skip_special_tokens=True
    )
    generate_kwargs = dict(
        model_inputs,
        streamer=streamer,
        max_new_tokens=max_new_tokens,
        do_sample=True,
        top_p=top_p,
        temperature=float(temperature),
        top_k=top_k,
    )
    t = Thread(target=model.generate, kwargs=generate_kwargs)
    t.start()

    # Pull the generated text from the streamer, and update the model output.
    model_output = ""
    for new_text in streamer:
        model_output += new_text
        yield model_output
    return model_output


def reset_textbox():
    return gr.update(value="")


with gr.Blocks() as demo:
    original_link = "https://huggingface.co/spaces/joaogante/transformers_streaming"
    gr.Markdown(
        "# OpenVINO and 🤗 Transformers 🔥Streaming🔥 on Gradio\n"
        "This demo showcases the use of the "
        "[streaming feature](https://huggingface.co/docs/transformers/main/en/generation_strategies#streaming) "
        "of 🤗 Transformers with OpenVINO models and Gradio to generate text in real-time. It uses "
        f"[{original_model_id}](https://huggingface.co/{original_model_id}), "
        "converted to OpenVINO.\n\n"
        f"This space was duplicated from {original_link} and modified for OpenVINO models."
    )

    with gr.Row():
        with gr.Column(scale=4):
            user_text = gr.Textbox(
                placeholder="Write an email about an alpaca that likes flan",
                label="User input",
            )
            model_output = gr.Textbox(label="Model output", lines=10, interactive=False)
            button_submit = gr.Button(value="Submit")

        with gr.Column(scale=1):
            max_new_tokens = gr.Slider(
                minimum=1,
                maximum=1000,
                value=250,
                step=1,
                interactive=True,
                label="Max New Tokens",
            )
            top_p = gr.Slider(
                minimum=0.05,
                maximum=1.0,
                value=0.95,
                step=0.05,
                interactive=True,
                label="Top-p (nucleus sampling)",
            )
            top_k = gr.Slider(
                minimum=1,
                maximum=50,
                value=50,
                step=1,
                interactive=True,
                label="Top-k",
            )
            temperature = gr.Slider(
                minimum=0.1,
                maximum=5.0,
                value=0.8,
                step=0.1,
                interactive=True,
                label="Temperature",
            )

    user_text.submit(
        run_generation,
        [user_text, top_p, temperature, top_k, max_new_tokens],
        model_output,
    )
    button_submit.click(
        run_generation,
        [user_text, top_p, temperature, top_k, max_new_tokens],
        model_output,
    )

    demo.queue(max_size=32).launch(enable_queue=True, server_name="0.0.0.0")