"""
The Streamlit app for the project demo.
In the demo, the user can write a prompt
 and the model will generate a response using the grouped sampling algorithm.
"""

import streamlit as st
from torch.cuda import CudaError

from available_models import AVAILABLE_MODELS
from hanlde_form_submit import on_form_submit


st.title("A Single Usage is All You Need - Demo")

with st.form("request_form"):
    selected_model_name: str = st.selectbox(
        label="choose a model",
        options=AVAILABLE_MODELS,
        help="opt-iml-max-30b generates better texts but is slower",
    )

    output_length: int = st.number_input(
        label="the length of the output (in tokens)",
        min_value=1,
        max_value=1024,
        value=5,
    )

    submitted_prompt: str = st.text_area(
        label="prompt",
        value="""
        Keywords: cat, look, mouse
        What is a sentence that includes all these keywords?
        Answer:""",
        max_chars=1024,
    )

    submitted: bool = st.form_submit_button(
        label="generate text",
        disabled=False,
    )

    if submitted:
        try:
            output = on_form_submit(
                selected_model_name,
                output_length,
                submitted_prompt,
            )
        except CudaError as e:
            st.error("Out of memory. Please try a smaller model, shorter prompt, or a smaller output length.")
        except (ValueError, TypeError, RuntimeError) as e:
            st.error(e)
        else:
            st.write(f"Generated text: {output}")