app.py

#%% 
from tiktoken import get_encoding, encoding_for_model
from weaviate_interface import WeaviateClient, WhereFilter
from sentence_transformers import SentenceTransformer
from prompt_templates import question_answering_prompt_series, question_answering_system
from openai_interface import GPT_Turbo
from app_features import (convert_seconds, generate_prompt_series, search_result,
                          validate_token_threshold, load_content_cache, load_data,
                          expand_content)
from retrieval_evaluation import execute_evaluation, calc_hit_rate_scores
from llama_index.finetuning import EmbeddingQAFinetuneDataset

from openai import BadRequestError
from reranker import ReRanker
from loguru import logger 
import streamlit as st
from streamlit_option_menu import option_menu
import hydralit_components as hc
import sys
import json
import os, time, requests, re
from datetime import timedelta
import pathlib
import gdown
import tempfile
import base64
import shutil

def get_base64_of_bin_file(bin_file):
    with open(bin_file, 'rb') as file:
        data = file.read()
    return base64.b64encode(data).decode()

from dotenv import load_dotenv, find_dotenv
load_dotenv(find_dotenv('env'), override=True)

# I use a key that I increment each time I want to change a text_input
if 'key' not in st.session_state:
    st.session_state.key = 0
# key = st.session_state['key']

if not pathlib.Path('models').exists():
    os.mkdir('models')

# TODO cache these things but no time left

# I put a file local.txt in my desktop models folder to find out if it's running online
we_are_online = not pathlib.Path("models/local.txt").exists()
we_are_not_online = not we_are_online

golden_dataset = EmbeddingQAFinetuneDataset.from_json("data/golden_100.json")

## PAGE CONFIGURATION
st.set_page_config(page_title="Ask Impact Theory", 
                   page_icon="assets/impact-theory-logo-only.png", 
                   layout="wide", 
                   initial_sidebar_state="collapsed", 
                   menu_items={'Report a bug': "https://www.extremelycoolapp.com/bug"})


image = "https://is2-ssl.mzstatic.com/image/thumb/Music122/v4/bd/34/82/bd348260-314c-5898-26c0-bef2e0388ebe/source/1200x1200bb.png"


def add_bg_from_local(image_file):
    bin_str = get_base64_of_bin_file(image_file)
    page_bg_img = f'''
    <style>
    .stApp {{
      background-image: url("data:image/png;base64,{bin_str}");
      background-size: 100% auto;
      background-repeat: no-repeat;
      background-attachment: fixed;
    }}
    </style>
    ''' 
    
    st.markdown(page_bg_img, unsafe_allow_html=True)

## RERANKER
reranker = ReRanker('cross-encoder/ms-marco-MiniLM-L-6-v2')
## ENCODING  --> tiktoken library
model_ids = ['gpt-3.5-turbo-16k', 'gpt-3.5-turbo-0613']
model_nameGPT = model_ids[1]
encoding = encoding_for_model(model_nameGPT)

## DATA
data_path = './data/impact_theory_data.json'
cache_path = 'data/impact_theory_cache.parquet'
data = load_data(data_path)
cache = None  # load_content_cache(cache_path) 
guest_list = sorted(list(set([d['guest'] for d in data])))

if 'secrets' in st.secrets:
    # st.write("Loading secrets from [secrets] section")
    # for streamlit online or local, which uses a [secrets] section
    Wapi_key = st.secrets['secrets']['WEAVIATE_API_KEY']
    url = st.secrets['secrets']['WEAVIATE_ENDPOINT']
    openai_api_key = st.secrets['secrets']['OPENAI_API_KEY']

    # hf_token = st.secrets['secrets']['LLAMA2_ENDPOINT_HF_TOKEN']
    # hf_endpoint = st.secrets['secrets']['LLAMA2_ENDPOINT']

else :
    # st.write("Loading secrets for Huggingface")
    # for Huggingface (no [secrets] section)
    Wapi_key = st.secrets['WEAVIATE_API_KEY']
    url = st.secrets['WEAVIATE_ENDPOINT']
    openai_api_key = st.secrets['OPENAI_API_KEY']

    # hf_token = st.secrets['LLAMA2_ENDPOINT_HF_TOKEN']
    # hf_endpoint = st.secrets['LLAMA2_ENDPOINT']

#%% 
# model_default = 'sentence-transformers/all-mpnet-base-v2'
model_default = 'models/finetuned-all-mpnet-base-v2-300' if we_are_not_online \
           else 'sentence-transformers/all-mpnet-base-v2'

available_models = ['sentence-transformers/all-mpnet-base-v2',
                    'sentence-transformers/all-MiniLM-L6-v2', 
                    'models/finetuned-all-mpnet-base-v2-300',
                    'sentence-transformers/all-MiniLM-L12-v2']
    
#%%
models_urls = {'models/finetuned-all-mpnet-base-v2-300': "https://drive.google.com/drive/folders/1asJ37-AUv5nytLtH6hp6_bVV3_cZOXfj"}

def download_model_from_Gdrive(model_name_or_path, model_local_path):
    st.write("Downloading model from Google Drive")
    assert model_name_or_path in models_urls, f"Model {model_name_or_path} not found in models_urls"
    url = models_urls[model_name_or_path]
    gdown.download_folder(url, output=model_local_path, quiet=False, use_cookies=False)
    print(f"Model downloaded from Gdrive and saved to {model_local_path} folder")
    # st.write("Model downloaded")

def download_model(model_name_or_path, model_local_path):

    if model_name_or_path.startswith("models/"):
        download_model_from_Gdrive(model_name_or_path, model_local_path)

    elif model_name_or_path.startswith("sentence-transformers/"):
        st.sidebar.write(f"Downloading {model_name_or_path}")
        model = SentenceTransformer(model_name_or_path) 
        st.sidebar.write(f"Model {model_name_or_path} downloaded")
        
        models_urls[model_name_or_path] = model_local_path
        model.save(model_local_path)
        # st.sidebar.write(f"Model {model_name_or_path} saved to {model_new_path}")

#%%
# for streamlit online, we must download the model from google drive
# because github LFS doesn't work on forked repos
def check_model(model_name_or_path):
    
    model_name = model_name_or_path.split('/')[-1] # remove 'sentence-transformers'
    model_local_path = str(pathlib.Path("models") / model_name) # this creates a models folder inside /models
 
    if pathlib.Path(model_local_path).exists():
        # let's use the model that's already there
        print(f"Model {model_local_path} already exists")
    else: 
        # let's download the model, HF is not limited in space like Streamlit.io        
        download_model(model_name_or_path, model_local_path)


#%% instantiate Weaviate client
def get_weaviate_client(api_key, url, model_name_or_path, openai_api_key):
    try:
        client = WeaviateClient(api_key, url, 
                                model_name_or_path=model_name_or_path, 
                                openai_api_key=openai_api_key)
    except Exception:
        # client not available, wrong key, expired free sandbox etc
        return None, None
    
    try:
        client.display_properties.append('summary')
        # available_classes = sorted(client.show_classes()) # doesn't work anymore
        # print(available_classes)
        available_classes = sorted([c['class'] for c in client.schema.get()['classes']])
        # print(available_classes)
        # st.write(f"Available classes: {available_classes}")
        # st.write(f"Available classes type: {type(available_classes)}")
        logger.info(available_classes)
        return client, available_classes
    
    except Exception:
        return client, []


##############

def main():

    with st.sidebar:
        _, center, _ = st.columns([3, 5, 3])
        with center:
            st.text("Search Lab")
            
        _, center, _ = st.columns([2, 5, 3])
        with center:
            if we_are_online:
                st.text("Running ONLINE")
                # st.text("(UNSTABLE)")
            else:
                st.text("Running OFFLINE")
        st.write("----------")

        hybrid_search = st.toggle('Hybrid Search', True)
        if hybrid_search:
            alpha_input = st.slider(label='Alpha',min_value=0.00, max_value=1.00, value=0.40, step=0.05, key=1)
            retrieval_limit = st.slider(label='Hybrid Search Results', min_value=10, max_value=300, value=10, step=10)

            hybrid_filter = st.toggle('Filter Search using Guest name', True) # i.e. look only at guests' data
            
            rerank = st.toggle('Rerank', True)
            if rerank:
                reranker_topk = st.slider(label='Reranker Top K',min_value=1, max_value=5, value=3, step=1)
            else:
                # needed to not fill the LLM with too many responses (> context size)
                # we could make it dependent on the model
                reranker_topk = 3
            
            rag_it = st.toggle(f"RAG it with '{model_nameGPT}'", True)
            if rag_it:
                # st.write(f"Using LLM '{model_nameGPT}'")
                llm_temperature = st.slider(label='LLM T˚', min_value=0.0, max_value=2.0, value=0.01, step=0.10 )
        
        model_name_or_path = st.selectbox(label='Model Name:', options=available_models, 
                                          index=available_models.index(model_default),
                                          placeholder='Select Model')
        
        delete_models = st.button('Delete models')
        if delete_models:
            # model_path = os.path.join("models", model_name_or_path.split('/')[-1])
            # if os.path.isdir(model_path):
            #     shutil.rmtree(model_path) 
            for model in os.listdir("models"):
                model_path = os.path.join("models", model)
                if os.path.isdir(model_path) and 'finetuned-all-mpnet-base-v2-300' not in model_path:
                    shutil.rmtree(model_path)
            st.write("Models deleted")
            
        if we_are_not_online:
            st.write("Experimental and time limited 2'")
            c1,c2 = st.columns([8,1])
            with c1: 
                finetune_model = st.button('Finetune on Modal A100 GPU')
                if finetune_model:
                    from finetune_backend import finetune 
                    if 'finetuned' in model_name_or_path:
                        st.write("Model already finetuned")
                    elif "models/" in model_name_or_path:
                        st.write("sentence-transformers models only!")
                    else:
                        try:
                            if 'finetuned' in model_name_or_path:
                                st.write("Model already finetuned")
                            else:
                                with c2:
                                    with st.spinner(''):
                                        model_path = finetune(model_name_or_path, savemodel=True, outpath='models')
                                with c1:
                                    if model_path is not None:
                                        if model_name_or_path.split('/')[-1] not in model_path:
                                            st.sidebar.write(model_path)  # a warning from finetuning in this case
                                        # TODO: add model to Weaviate and to model list
                        except Exception:
                            st.write("Model not found on HF or error")
                else:
                    st.write("Finetuning not available on Streamlit online because of space limitations")
        
        check_model(model_name_or_path)
        client, available_classes = get_weaviate_client(Wapi_key, url, model_name_or_path, openai_api_key)       
        print("Available classes:", available_classes)
        
        if client is None:
            # maybe the free sandbox has expired, or the api key is wrong
            st.sidebar.write(f"Weaviate sandbox not accessible or expired")
            # st.stop()

        elif available_classes:                               
            start_class = 'Impact_theory_all_mpnet_base_v2_finetuned'  

            class_name = st.selectbox(
                label='Class Name:', 
                options=available_classes, 
                index=available_classes.index(start_class), 
                placeholder='Select Class Name' 
                )
            
            st.write("----------")
            
            if we_are_not_online:
                c1,c2 = st.columns([8,1])
                with c1:
                    show_metrics = st.button('Show Metrics on Golden set')
                    if show_metrics:
                        # we must add it because the hybrid search toggle could hide it
                        alpha_input2 = st.slider(label='Alpha',min_value=0.00, max_value=1.00, value=0.40, step=0.05, key=2)
                    
                        # _, center, _ = st.columns([3, 5, 3])
                        # with center:
                        #     st.text("Metrics")
                        with c2:
                            with st.spinner(''):
                                metrics = execute_evaluation(golden_dataset, class_name, client, alpha=alpha_input2)
                        with c1:
                            kw_hit_rate = metrics['kw_hit_rate']
                            kw_mrr = metrics['kw_mrr']
                            hybrid_hit_rate = metrics['hybrid_hit_rate']
                            vector_hit_rate = metrics['vector_hit_rate']
                            vector_mrr = metrics['vector_mrr']
                            total_misses = metrics['total_misses']
                            
                            st.text(f"KW hit rate: {kw_hit_rate}")
                            st.text(f"Vector hit rate: {vector_hit_rate}")
                            st.text(f"Hybrid hit rate: {hybrid_hit_rate}")
                            st.text(f"Hybrid MRR: {vector_mrr}")
                            st.text(f"Total misses: {total_misses}")

            st.write("----------")
        else:
            # Weaviate doesn't know this model, maybe we're just finetuning a model
            st.sidebar.write(f"Model Unknown to Weaviate")
            
            
    st.title("Chat with the Impact Theory podcasts!")
    # st.image('./assets/impact-theory-logo.png', width=400)
    st.image('assets/it_tom_bilyeu.png', use_column_width=True)
    # st.subheader(f"Chat with the Impact Theory podcast: ")
    st.write('\n')
    # st.stop()
    
    st.write("\u21D0 Open the sidebar to change Search settings \n ")  # https://home.unicode.org also 21E0, 21B0  B2 D0
    
    if client is None:
        st.write("Weaviate sandbox not accessible or expired!!! Stopping execution!")
        st.stop()
    elif not available_classes:
        # we have to stop here, to exit the 'with st.sidebar' block and display the banner at least
        st.stop()

    if not hybrid_search:
        st.stop()
        
    col1, _ = st.columns([3,7])
    with col1:
        guest = st.selectbox('Select A Guest', 
                                options=guest_list, 
                                index=None, 
                                placeholder='Select Guest')

    col1, col2 = st.columns([7,3])
    with col1:
        if guest is None:
            msg = f'Select a guest before asking your question:'
        else:
            msg = f'Enter your question about {guest}:'
        
        textbox = st.empty()
        # best solution I found to be able to change the text inside a text_input box afterwards, using a key
        query = textbox.text_input(msg, 
                                  value="", 
                                  placeholder="You can refer to the guest with PRONOUNS",
                                  key=st.session_state.key)
        
        # st.write(f"Guest = {guest}")
        # st.write(f"key = {st.session_state.key}")
                
        st.write('\n\n\n\n\n')

        reworded_query = {'changed': False, 'status': 'error'} # at start, the query is empty
        valid_response = [] # at start, the query is empty, so prevent the search
        
        if query:
                            
            if guest is None:
                st.session_state.key += 1
                query = textbox.text_input(msg, 
                                        value="", 
                                        placeholder="YOU MUST SELECT A GUEST BEFORE ASKING A QUESTION",
                                        key=st.session_state.key)
                # st.write(f"key = {st.session_state.key}")
                st.stop()
            else:
                # st.write(f'It looks like you selected {guest} as a filter (It is ignored for now).')
                
                with col2:
                    # let's add a nice pulse bar while generating the response
                    with hc.HyLoader('', hc.Loaders.pulse_bars, primary_color= 'red', height=50):  #"#0e404d" for image green

                        with col1:
                            
                            if st.toggle('Rewrite query with LLM', True):
                
                                # let's use Llama2, and fall back on GPT3.5 if it fails
                                reworded_query = reword_query(query, guest, 
                                                            model_name='gpt-3.5-turbo-0125')
                                new_query = reworded_query['rewritten_question']
                                
                                if reworded_query['status'] != 'error': # or reworded_query['changed']: 
                                    guest_lastname = guest.split(' ')[1]
                                    if guest_lastname not in new_query:
                                        # if the guest name is not in the rewritten question, we add it
                                        new_query = f"About {guest}, " + new_query
                                    
                                query = new_query
                                st.write(f"New query: {query}")
                            
                            # we can arrive here only if a guest was selected
                            where_filter = WhereFilter(path=['guest'], operator='Equal', valueText=guest).todict() \
                                                if hybrid_filter else None
                       
                            hybrid_response = client.hybrid_search(query, 
                                                                class_name, 
                                                                # properties=['content'], #['title', 'summary', 'content'],
                                                                alpha=alpha_input,
                                                                display_properties=client.display_properties,
                                                                where_filter=where_filter,
                                                                limit=retrieval_limit)
                            response = hybrid_response

                            if rerank:
                                # rerank results with cross encoder
                                ranked_response = reranker.rerank(response, query,
                                                                apply_sigmoid=True, # score between 0 and 1
                                                                top_k=reranker_topk)
                                logger.info(ranked_response)
                                expanded_response = expand_content(ranked_response, cache, 
                                                                content_key='doc_id', 
                                                                create_new_list=True)

                                response = expanded_response

                        # make sure token count < threshold
                        token_threshold = 8000 if model_nameGPT == model_ids[0] else 3500
                        valid_response = validate_token_threshold(response, 
                                                                question_answering_prompt_series, 
                                                                query=query,
                                                                tokenizer= encoding,# variable from ENCODING,
                                                                token_threshold=token_threshold, 
                                                                verbose=True)
                        # st.write(f"Number of results: {len(valid_response)}")
                        
    # I jumped out of col1 to get all page width, so need to retest query
    if query:     

        # creates container for LLM response to position it above search results
        chat_container, response_box = [], st.empty()                        
        # # RAG time !! execute chat call to LLM
        if rag_it:
            # st.subheader("Response from Impact Theory (context)") 
            # will appear under the answer, moved it into the response box

            # generate LLM prompt
            prompt = generate_prompt_series(query=query, results=valid_response)

            
            GPTllm = GPT_Turbo(model=model_nameGPT, 
                            api_key=openai_api_key)
            try:
                #   inserts chat stream from LLM
                for resp in GPTllm.get_chat_completion(prompt=prompt,
                                                        temperature=llm_temperature,
                                                        max_tokens=350,
                                                        show_response=True,
                                                        stream=True):
                    
                    with response_box:
                        content = resp.choices[0].delta.content
                        if content:
                            chat_container.append(content)
                            result = "".join(chat_container).strip()
                            response_box.markdown(f"### Response from Impact Theory (RAG):\n\n{result}")
            except BadRequestError as e:
                logger.info('Making request with smaller context')

                valid_response = validate_token_threshold(response,
                                                        question_answering_prompt_series,
                                                        query=query,
                                                        tokenizer=encoding,
                                                        token_threshold=3500,
                                                        verbose=True)
                # if reranker is off, we may receive a LOT of responses
                # so we must reduce the context size manually
                if not rerank:
                    valid_response = valid_response[:reranker_topk]
                                    
                prompt = generate_prompt_series(query=query, results=valid_response)
                for resp in GPTllm.get_chat_completion(prompt=prompt,
                                                    temperature=llm_temperature,
                                                    max_tokens=350,  # expand for more verbose answers
                                                    show_response=True,
                                                    stream=True):
                    try:
                        # inserts chat stream from LLM
                        with response_box:
                            content = resp.choice[0].delta.content
                            if content:
                                chat_container.append(content)
                                result = "".join(chat_container).strip()
                                response_box.markdown(f"### Response from Impact Theory (RAG):\n\n{result}")
                    except Exception as e:
                        print(e)
                    
        st.markdown("----")
        st.subheader("Search Results")

        for i, hit in enumerate(valid_response):
            col1, col2 = st.columns([7, 3], gap='large')
            image = hit['thumbnail_url'] # get thumbnail_url
            episode_url = hit['episode_url'] # get episode_url
            title = hit["title"] # get title
            show_length = hit["length"] # get length
            time_string = str(timedelta(seconds=show_length)) # convert show_length to readable time string

            with col1:
                st.write(search_result(i=i,
                                        url=episode_url,
                                        guest=hit['guest'],
                                        title=title,
                                        content='',
                                        length=time_string),
                                        unsafe_allow_html=True)
                st.write('\n\n')
            
            with col2:
                #st.write(f"<a href={episode_url} <img src={image} width='200'></a>",
                #         unsafe_allow_html=True)
                #st.markdown(f"[![{title}]({image})]({episode_url})")
                # st.markdown(f'<a href="{episode_url}">'
                #            f'<img src={image} '
                #            f'caption={title.split("|")[0]} width=200, use_column_width=False />'
                #            f'</a>',
                #            unsafe_allow_html=True)

                st.image(image, caption=title.split('|')[0], width=200, use_column_width=False)
            # let's use all width for the content
            st.write(hit['content'])


def get_answer(query, valid_response, GPTllm):

    # generate LLM prompt
    prompt = generate_prompt_series(query=query,
                                    results=valid_response)

    return GPTllm.get_chat_completion(prompt=prompt,
                                   system_message='answer this question based on the podcast material',
                                   temperature=0,
                                   max_tokens=500,
                                   stream=False,
                                   show_response=False)

def reword_query(query, guest, model_name='llama2-13b-chat', response_processing=True):
    """ Asks LLM to rewrite the query when the guest name is missing.

    Args:
        query (str): user query
        guest (str): guest name
        model_name (str, optional): name of a LLM model to be used
    """
    
    # tags = {'llama2-13b-chat': {'start': '<s>', 'end': '</s>', 'instruction': '[INST]', 'system': '[SYS]'},
    #         'gpt-3.5-turbo-0613': {'start': '<|startoftext|>', 'end': '', 'instruction': "```", 'system': ```}}
    
    prompt_fields = {
        "you_are":f"You are an expert in linguistics and semantics, analyzing the question asked by a user to a vector search system, \
                    and making sure that the question is well formulated and understandable by any average reader.",

        "your_task":f"Your task is to detect if the name of the guest ({guest}) is mentioned in the question '{query}', \
                    If that is not the case, rewrite the question using the guest name, \
                    without changing the meaning of the question. \
                    Most of the time, the user will have used a pronoun to designate the guest, in which case, \
                    simply replace the pronoun with the guest name. \
                    If the guest name is already present in the question, return the original question as is.",

        "final_instruction":f"Only regenerate the requested rewritten question or the original, WITHOUT ANY COMMENT OR REPHRASING. \
                    Your answer must be as close as possible to the original question, \
                    and exactly identical, word for word, if the user mentions the guest name, i.e. {guest}.",
                    
        "question":f"{query}"
    }

    # prompt created by chatGPT :-) 
    # and Llama still outputs the original question and precedes the answer with 'rewritten question' 
    prompt_fields2 = {
    "you_are": (
        "You are an expert in linguistics and semantics. Your role is to analyze questions asked to a vector search system."
    ),
    "your_task": (
        f"Detect if the guest's FULL name, {guest}, is mentioned in the user's question. "
        "If not, rewrite the question by replacing pronouns or indirect references with the guest's name." \
        "If yes, return the original question as is, without any change at all, not even punctuation,"
        "except a question mark that you MUST add if it's missing."
    ),
    "question": (
        f"Original question: '{query}'. "
        "Rewrite this question to include the guest's FULL name if it's not already mentioned."
        "Add a question mark if it's missing, nothing else."
    ),
    "final_instruction": (
        "Create a rewritten question or keep the original question as is. "
        "Do not include any labels, titles, or additional text before or after the question."
        "The Only thing you can and MUST add is a question mark if it's missing."
        "Return a json object, with the key 'original_question' for the original question, \
        and 'rewritten_question' for the rewritten question \
        and 'changed' being True if you changed the answer, otherwise False."
    ),
    }
    

    if model_name == 'llama2-13b-chat':
        # special tags are used:
        # `<s>` - start prompt tag
        # `[INST], [/INST]` - Opening and closing model instruction tags
        # `<<<SYS>>>, <</SYS>>` - Opening and closing system prompt tags
        llama_prompt = """
        <s>[INST] <<SYS>> 
        {you_are}
        <</SYS>>
        {your_task}\n

        ```
        \n\n
        Question: {question}\n
        {final_instruction} [/INST]

        Answer:
        """
        prompt = llama_prompt.format(**prompt_fields2)
        
        headers = {"Authorization": f"Bearer {hf_token}",
                "Content-Type": "application/json",}

        json_body = {
                "inputs": prompt,
                "parameters": {"max_new_tokens":400, 
                               "repetition_penalty": 1.0, 
                               "temperature":0.01}
        }
        
        response = requests.request("POST", hf_endpoint, headers=headers, data=json.dumps(json_body))
        response = json.loads(response.content.decode("utf-8")) 
        # ^ will not process the badly formatted generated text, so we do it ourselves
        
        if isinstance(response, dict) and 'error' in response:
            print("Found error")
            print(response)
            # return {'error': response['error'], 'rewritten_question': query, 'changed': False, 'status': 'error'}
            # I test this here otherwise it gets in col 2 or 1, which are too
            # if reworded_query['status'] == 'error':
            # st.write(f"Error in LLM response: 'error':{reworded_query['error']}")
            # st.write("The LLM could not connect to the server. Please try again later.")
            # st.stop()
            return reword_query(query, guest, model_name='gpt-3.5-turbo-0125')
            
        if response_processing:
            if isinstance(response, list) and isinstance(response[0], dict) and 'generated_text' in response[0]:
                print("Found generated text")
                response0 = response[0]['generated_text']
                pattern = r'\"(\w+)\":\s*(\".*?\"|\w+)'

                matches = re.findall(pattern, response0)
                # let's build a dictionary
                result = {key: json.loads(value) if value.startswith("\"") else value for key, value in matches}
                return result | {'status': 'success'}
            else:
                print("Found no answer")
                return reword_query(query, guest, model_name='gpt-3.5-turbo-0125')
                # return {'original_question': query, 'rewritten_question': query, 'changed': False, 'status': 'no properly formatted answer' }
        else:
            return response
        # return response
        # assert 'error' not in response, f"Error in LLM response: {response['error']}"
        # assert 'generated_text' in response[0], f"Error in LLM response: {response}, no 'generated_text' field"
        # # let's extract the rewritten question
        # return response[0]['generated_text'] .split("Rewritten question: '")[-1][:-1]
    
    else:
        # we assume / force openai 
        model_ids = ['gpt-3.5-turbo-0125', 'gpt-3.5-turbo-16k', 'gpt-3.5-turbo-0613']
        if model_name not in model_ids:
            model_name = model_ids[0]
        GPTllm = GPT_Turbo(model=model_name, api_key=openai_api_key)
        
        openai_prompt = """
        {your_task} \n
        {final_instruction} /n 
        ```
        \n\n
        Question: {question}\n

        Answer:
        """
        prompt = openai_prompt.format(**prompt_fields)

        try:
            # https://platform.openai.com/docs/guides/text-generation/chat-completions-api
            resp = GPTllm.get_chat_completion(prompt=prompt,
                                            system_message=prompt_fields['you_are'],
                                            user_message = None, 
                                            temperature=0.01,
                                            max_tokens=1500, # it's a long question...
                                            show_response=True,
                                            stream=False)

            if resp.choices[0].finish_reason == 'stop':
                if guest in resp.choices[0].message.content:
                    new_question = resp.choices[0].message.content
                return {'rewritten_question': new_question,
                        'changed': True, 'status': 'success'}
            else:
                raise Exception("LLM did not stop")  # to go to the except block
        except Exception:
            return {'rewritten_question': query, 'changed': False, 'status': 'not success'}


if __name__ == '__main__':
    main()
    # streamlit run app.py --server.allowRunOnSave True