import streamlit as st
from transformers import AutoModelForCausalLM, AutoTokenizer

@st.cache_resource
def load_model_and_tokenizer():
    model_name_or_path = "m42-health/med42-70b"
    model = AutoModelForCausalLM.from_pretrained(model_name_or_path, device_map="auto")
    tokenizer = AutoTokenizer.from_pretrained(model_name_or_path)
    return model, tokenizer

def generate_response(prompt):
    prompt_template = f'''
    <|system|>: You are a helpful medical assistant created by M42 Health in the UAE.
    <|prompter|>:{prompt}
    <|assistant|>:
    '''
    input_ids = tokenizer(prompt_template, return_tensors='pt').input_ids.cuda()
    output = model.generate(inputs=input_ids, temperature=0.7, do_sample=True, eos_token_id=tokenizer.eos_token_id, pad_token_id=tokenizer.pad_token_id, max_new_tokens=512)
    response = tokenizer.decode(output[0], skip_special_tokens=True)
    return response

def main():
    st.title("M42 Health Medical Assistant")
    model, tokenizer = load_model_and_tokenizer()

    prompt = st.text_area("Enter your medical query:")
    if st.button("Submit"):
        with st.spinner("Generating response..."):
            response = generate_response(prompt)
            st.write(response)

if __name__ == "__main__":
    main()