app.py

import io
import os
from contextlib import closing
from typing import Optional, Tuple
import datetime

import boto3
import gradio as gr
import requests

# UNCOMMENT TO USE WHISPER
import warnings
import whisper

from langchain import ConversationChain, LLMChain

from langchain.agents import load_tools, initialize_agent
from langchain.chains.conversation.memory import ConversationBufferMemory
from langchain.llms import OpenAI
from threading import Lock


# Console to variable
from io import StringIO
import sys
import re

from openai.error import AuthenticationError, InvalidRequestError, RateLimitError

# Pertains to Express-inator functionality
from langchain.prompts import PromptTemplate

from polly_utils import PollyVoiceData, NEURAL_ENGINE

openai_api_key_textbox = "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"

news_api_key = os.environ["NEWS_API_KEY"]
tmdb_bearer_token = os.environ["TMDB_BEARER_TOKEN"]

TOOLS_LIST = ['serpapi', 'wolfram-alpha', 'google-search', 'pal-math', 'pal-colored-objects', 'news-api', 'tmdb-api',
              'open-meteo-api']
TOOLS_DEFAULT_LIST = ['serpapi', 'wolfram-alpha', 'pal-math', 'pal-colored-objects', 'news-api', 'tmdb-api',
              'open-meteo-api']
BUG_FOUND_MSG = "Congratulations, you've found a bug in this application!"
AUTH_ERR_MSG = "Please paste your OpenAI key."
MAX_TOKENS = 512

# Pertains to Express-inator functionality
NUM_WORDS_DEFAULT = 0
MAX_WORDS = 400
FORMALITY_DEFAULT = "N/A"
TEMPERATURE_DEFAULT = 0.5
EMOTION_DEFAULT = "N/A"
TRANSLATE_TO_DEFAULT = "N/A"
LITERARY_STYLE_DEFAULT = "N/A"
PROMPT_TEMPLATE = PromptTemplate(
    input_variables=["original_words", "num_words", "formality", "emotions", "translate_to", "literary_style"],
    template="Restate {num_words}{formality}{emotions}{translate_to}{literary_style}the following: \n{original_words}\n",
)

POLLY_VOICE_DATA = PollyVoiceData()


# UNCOMMENT TO USE WHISPER
warnings.filterwarnings("ignore")
WHISPER_MODEL = whisper.load_model("tiny")
print("WHISPER_MODEL", WHISPER_MODEL)


# UNCOMMENT TO USE WHISPER
def transcribe(aud_inp):
    if aud_inp is None:
        return ""
    aud = whisper.load_audio(aud_inp)
    aud = whisper.pad_or_trim(aud)
    mel = whisper.log_mel_spectrogram(aud).to(WHISPER_MODEL.device)
    _, probs = WHISPER_MODEL.detect_language(mel)
    options = whisper.DecodingOptions()
    # options = whisper.DecodingOptions(language="ja")
    result = whisper.decode(WHISPER_MODEL, mel, options)
    print("result.text", result.text)
    result_text = ""
    if result and result.text:
        result_text = result.text
    return result_text


# Pertains to Express-inator functionality
def transform_text(desc, express_chain, num_words, formality,
                   anticipation_level, joy_level, trust_level,
                   fear_level, surprise_level, sadness_level, disgust_level, anger_level,
                   translate_to, literary_style):
    num_words_prompt = ""
    if num_words and int(num_words) != 0:
        num_words_prompt = "using up to " + str(num_words) + " words, "

    # Change some arguments to lower case
    formality = formality.lower()
    anticipation_level = anticipation_level.lower()
    joy_level = joy_level.lower()
    trust_level = trust_level.lower()
    fear_level = fear_level.lower()
    surprise_level = surprise_level.lower()
    sadness_level = sadness_level.lower()
    disgust_level = disgust_level.lower()
    anger_level = anger_level.lower()

    formality_str = ""
    if formality != "n/a":
        formality_str = "in a " + formality + " manner, "

    # put all emotions into a list
    emotions = []
    if anticipation_level != "n/a":
        emotions.append(anticipation_level)
    if joy_level != "n/a":
        emotions.append(joy_level)
    if trust_level != "n/a":
        emotions.append(trust_level)
    if fear_level != "n/a":
        emotions.append(fear_level)
    if surprise_level != "n/a":
        emotions.append(surprise_level)
    if sadness_level != "n/a":
        emotions.append(sadness_level)
    if disgust_level != "n/a":
        emotions.append(disgust_level)
    if anger_level != "n/a":
        emotions.append(anger_level)

    emotions_str = ""
    if len(emotions) > 0:
        if len(emotions) == 1:
            emotions_str = "with emotion of " + emotions[0] + ", "
        else:
            emotions_str = "with emotions of " + ", ".join(emotions[:-1]) + " and " + emotions[-1] + ", "

    translate_to_str = ""
    if translate_to != TRANSLATE_TO_DEFAULT:
        translate_to_str = "translated to " + translate_to + ", "

    literary_style_str = ""
    if literary_style != LITERARY_STYLE_DEFAULT:
        if literary_style == "Prose":
            literary_style_str = "as prose, "
        elif literary_style == "Summary":
            literary_style_str = "as a summary, "
        elif literary_style == "Outline":
            literary_style_str = "as an outline numbers and lower case letters, "
        elif literary_style == "Bullets":
            literary_style_str = "as bullet points using bullets, "
        elif literary_style == "Poetry":
            literary_style_str = "as a poem, "
        elif literary_style == "Haiku":
            literary_style_str = "as a haiku, "
        elif literary_style == "Limerick":
            literary_style_str = "as a limerick, "
        elif literary_style == "Joke":
            literary_style_str = "as a very funny joke with a setup and punchline, "
        elif literary_style == "Knock-knock":
            literary_style_str = "as a very funny knock-knock joke, "

    formatted_prompt = PROMPT_TEMPLATE.format(
        original_words=desc,
        num_words=num_words_prompt,
        formality=formality_str,
        emotions=emotions_str,
        translate_to=translate_to_str,
        literary_style=literary_style_str
    )

    trans_instr = num_words_prompt + formality_str + emotions_str + translate_to_str + literary_style_str
    if express_chain and len(trans_instr.strip()) > 0:
        generated_text = express_chain.run(
            {'original_words': desc, 'num_words': num_words_prompt, 'formality': formality_str,
             'emotions': emotions_str, 'translate_to': translate_to_str,
             'literary_style': literary_style_str}).strip()
    else:
        print("Not transforming text")
        generated_text = desc

    # replace all newlines with <br> in generated_text
    generated_text = generated_text.replace("\n", "\n\n")

    prompt_plus_generated = "GPT prompt: " + formatted_prompt + "\n\n" + generated_text

    print("\n==== date/time: " + str(datetime.datetime.now() - datetime.timedelta(hours=5)) + " ====")
    print("prompt_plus_generated: " + prompt_plus_generated)

    return generated_text


def load_chain(tools_list, llm):
    chain = None
    express_chain = None
    if llm:
        print("\ntools_list", tools_list)
        tool_names = tools_list
        tools = load_tools(tool_names, llm=llm, news_api_key=news_api_key, tmdb_bearer_token=tmdb_bearer_token)

        memory = ConversationBufferMemory(memory_key="chat_history")

        chain = initialize_agent(tools, llm, agent="conversational-react-description", verbose=True, memory=memory)
        express_chain = LLMChain(llm=llm, prompt=PROMPT_TEMPLATE, verbose=True)

    return chain, express_chain


def set_openai_api_key(api_key):
    """Set the api key and return chain.
    If no api_key, then None is returned.
    """
    print("set openai api")
    print(openai_api_key_textbox)
    api_key = "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"
    print("api key: "+ api_key)
    if api_key and api_key.startswith("sk-") and len(api_key) > 50:
        print("if statement passed")
        os.environ["OPENAI_API_KEY"] = api_key
        llm = OpenAI(temperature=0, max_tokens=MAX_TOKENS)
        chain, express_chain = load_chain(TOOLS_DEFAULT_LIST, llm)
        os.environ["OPENAI_API_KEY"] = ""
        return chain, express_chain, llm
    return None, None, None


def run_chain(chain, inp, capture_hidden_text):
    output = ""
    hidden_text = None
    if capture_hidden_text:
        error_msg = None
        tmp = sys.stdout
        hidden_text_io = StringIO()
        sys.stdout = hidden_text_io

        try:
            output = chain.run(input=inp)
        except AuthenticationError as ae:
            error_msg = AUTH_ERR_MSG
        except RateLimitError as rle:
            error_msg = "\n\nRateLimitError: " + str(rle)
        except ValueError as ve:
            error_msg = "\n\nValueError: " + str(ve)
        except InvalidRequestError as ire:
            error_msg = "\n\nInvalidRequestError: " + str(ire)
        except Exception as e:
            error_msg = "\n\n" + BUG_FOUND_MSG + ":\n\n" + str(e)

        sys.stdout = tmp
        hidden_text = hidden_text_io.getvalue()

        # remove escape characters from hidden_text
        hidden_text = re.sub(r'\x1b[^m]*m', '', hidden_text)

        # remove "Entering new AgentExecutor chain..." from hidden_text
        hidden_text = re.sub(r"Entering new AgentExecutor chain...\n", "", hidden_text)

        # remove "Finished chain." from hidden_text
        hidden_text = re.sub(r"Finished chain.", "", hidden_text)

        # Add newline after "Thought:" "Action:" "Observation:" "Input:" and "AI:"
        hidden_text = re.sub(r"Thought:", "\n\nThought:", hidden_text)
        hidden_text = re.sub(r"Action:", "\n\nAction:", hidden_text)
        hidden_text = re.sub(r"Observation:", "\n\nObservation:", hidden_text)
        hidden_text = re.sub(r"Input:", "\n\nInput:", hidden_text)
        hidden_text = re.sub(r"AI:", "\n\nAI:", hidden_text)

        if error_msg:
            hidden_text += error_msg

        print("hidden_text: ", hidden_text)
    else:
        try:
            output = chain.run(input=inp)
        except AuthenticationError as ae:
            output = AUTH_ERR_MSG
        except RateLimitError as rle:
            output = "\n\nRateLimitError: " + str(rle)
        except ValueError as ve:
            output = "\n\nValueError: " + str(ve)
        except InvalidRequestError as ire:
            output = "\n\nInvalidRequestError: " + str(ire)
        except Exception as e:
            output = "\n\n" + BUG_FOUND_MSG + ":\n\n" + str(e)

    return output, hidden_text


class ChatWrapper:

    def __init__(self):
        print("init")
        set_openai_api_key("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")
        print("api key 2: " + openai_api_key_textbox)
        self.lock = Lock()

    def __call__(
        self, api_key: str, inp: str, history: Optional[Tuple[str, str]], chain: Optional[ConversationChain],
        trace_chain: bool, speak_text: bool, express_chain: Optional[LLMChain],
        num_words, formality, anticipation_level, joy_level, trust_level,
        fear_level, surprise_level, sadness_level, disgust_level, anger_level,
        translate_to, literary_style
    ):
        """Execute the chat functionality."""
        self.lock.acquire()

        try:
            api_key = "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"
            print("api key: " + api_key)
            print("\n==== date/time: " + str(datetime.datetime.now()) + " ====")
            print("inp: " + inp)
            print("trace_chain: ", trace_chain)
            print("speak_text: ", speak_text)


            history = history or []
            # If chain is None, that is because no API key was provided.
            output = "Please paste your OpenAI key to use this application."
            hidden_text = output

            if chain and chain != "":
                # Set OpenAI key
                import openai
                openai.api_key = api_key
                output, hidden_text = run_chain(chain, inp, capture_hidden_text=trace_chain)

            output = transform_text(output, express_chain, num_words, formality, anticipation_level, joy_level, trust_level,
                                    fear_level, surprise_level, sadness_level, disgust_level, anger_level,
                                    translate_to, literary_style)

            text_to_display = output
            if trace_chain:
                text_to_display = hidden_text + "\n\n" + output
            history.append((inp, text_to_display))

            # html_video, temp_file = do_html_video_speak(output)
            html_audio, temp_aud_file = None, None
            if speak_text:
                html_audio, temp_aud_file = do_html_audio_speak(output, translate_to)
        except Exception as e:
            raise e
        finally:
            self.lock.release()
        # return history, history, html_video, temp_file, ""
        return history, history, html_audio, temp_aud_file, ""


chat = ChatWrapper()


def do_html_audio_speak(words_to_speak, polly_language):
    polly_client = boto3.Session(
        aws_access_key_id=os.environ["AWS_ACCESS_KEY_ID"],
        aws_secret_access_key=os.environ["AWS_SECRET_ACCESS_KEY"],
        region_name=os.environ["AWS_DEFAULT_REGION"]
    ).client('polly')

    voice_id, language_code, engine = POLLY_VOICE_DATA.get_voice(polly_language, "Female")
    if not voice_id:
        voice_id = "Joanna"
        language_code = "en-US"
        engine = NEURAL_ENGINE
    response = polly_client.synthesize_speech(
        Text=words_to_speak,
        OutputFormat='mp3',
        VoiceId=voice_id,
        LanguageCode=language_code,
        Engine=engine
    )

    html_audio = '<pre>no audio</pre>'

    # Save the audio stream returned by Amazon Polly on Lambda's temp directory
    if "AudioStream" in response:
        with closing(response["AudioStream"]) as stream:
            # output = os.path.join("/tmp/", "speech.mp3")

            try:
                with open('audios/tempfile.mp3', 'wb') as f:
                    f.write(stream.read())
                temp_aud_file = gr.File("audios/tempfile.mp3")
                temp_aud_file_url = "/file=" + temp_aud_file.value['name']
                html_audio = f'<audio autoplay><source src={temp_aud_file_url} type="audio/mp3"></audio>'
            except IOError as error:
                # Could not write to file, exit gracefully
                print(error)
                return None, None
    else:
        # The response didn't contain audio data, exit gracefully
        print("Could not stream audio")
        return None, None

    return html_audio, "audios/tempfile.mp3"


def do_html_video_speak(words_to_speak):
    headers = {"Authorization": f"Bearer {os.environ['EXHUMAN_API_KEY']}"}
    body = {
        'bot_name': 'Masahiro',
        'bot_response': words_to_speak,
        'voice_name': 'Masahiro-EN'
    }
    api_endpoint = "https://api.exh.ai/animations/v1/generate_lipsync"
    res = requests.post(api_endpoint, json=body, headers=headers)

    html_video = '<pre>no video</pre>'
    if isinstance(res.content, bytes):
        response_stream = io.BytesIO(res.content)
        with open('videos/tempfile.mp4', 'wb') as f:
            f.write(response_stream.read())
        temp_file = gr.File("videos/tempfile.mp4")
        temp_file_url = "/file=" + temp_file.value['name']
        html_video = f'<video width="256" height="256" autoplay><source src={temp_file_url} type="video/mp4" poster="Masahiro.png"></video>'
    else:
        print('video url unknown')
    return html_video, "videos/tempfile.mp4"


def update_selected_tools(widget, state, llm):
    if widget:
        state = widget
        chain, express_chain = load_chain(state, llm)
        return state, llm, chain, express_chain


def update_foo(widget, state):
    if widget:
        state = widget
        return state


with gr.Blocks(css=".gradio-container {background-color: lightgray}") as block:
    llm_state = gr.State()
    history_state = gr.State()
    chain_state = gr.State()
    express_chain_state = gr.State()
    tools_list_state = gr.State(TOOLS_DEFAULT_LIST)
    trace_chain_state = gr.State(False)
    speak_text_state = gr.State(False)

    # Pertains to Express-inator functionality
    num_words_state = gr.State(NUM_WORDS_DEFAULT)
    formality_state = gr.State(FORMALITY_DEFAULT)
    anticipation_level_state = gr.State(EMOTION_DEFAULT)
    joy_level_state = gr.State(EMOTION_DEFAULT)
    trust_level_state = gr.State(EMOTION_DEFAULT)
    fear_level_state = gr.State(EMOTION_DEFAULT)
    surprise_level_state = gr.State(EMOTION_DEFAULT)
    sadness_level_state = gr.State(EMOTION_DEFAULT)
    disgust_level_state = gr.State(EMOTION_DEFAULT)
    anger_level_state = gr.State(EMOTION_DEFAULT)
    translate_to_state = gr.State(TRANSLATE_TO_DEFAULT)
    literary_style_state = gr.State(LITERARY_STYLE_DEFAULT)

    with gr.Tab("Chat"):
        with gr.Row():
            with gr.Column():
                gr.Markdown("<h4><center>Conversational Agent using GPT-3.5 & LangChain</center></h4>")

            openai_api_key_textbox = gr.Textbox(placeholder="Paste your OpenAI API key here (sk-...)",
                                                show_label=False, lines=1, type='password')

        with gr.Row():
            with gr.Column(scale=1, min_width=100, visible=False):
                my_file = gr.File(label="Upload a file", type="file", visible=False)
                tmp_file = gr.File("videos/Masahiro.mp4", visible=False)
                tmp_file_url = "/file=" + tmp_file.value['name']
                htm_video = f'<video width="256" height="256" autoplay muted loop><source src={tmp_file_url} type="video/mp4" poster="Masahiro.png"></video>'
                video_html = gr.HTML(htm_video)

                # my_aud_file = gr.File(label="Audio file", type="file", visible=True)
                tmp_aud_file = gr.File("audios/tempfile.mp3", visible=False)
                tmp_aud_file_url = "/file=" + tmp_aud_file.value['name']
                htm_audio = f'<audio><source src={tmp_aud_file_url} type="audio/mp3"></audio>'
                audio_html = gr.HTML(htm_audio)

            with gr.Column(scale=3):
                chatbot = gr.Chatbot()

        with gr.Row():
            message = gr.Textbox(label="What's on your mind??",
                                 placeholder="What's the answer to life, the universe, and everything?",
                                 lines=1)
            submit = gr.Button(value="Send", variant="secondary").style(full_width=False)

        # UNCOMMENT TO USE WHISPER
        with gr.Row():
            audio_comp = gr.Microphone(source="microphone", type="filepath", label="Just say it!",
                                       interactive=True, streaming=False)
            audio_comp.change(transcribe, inputs=[audio_comp], outputs=[message])

        gr.Examples(
            examples=["How many people live in Canada?",
                      "What is 2 to the 30th power?",
                      "If x+y=10 and x-y=4, what are x and y?",
                      "How much did it rain in SF today?",
                      "Get me information about the movie 'Avatar'",
                      "What are the top tech headlines in the US?",
                      "On the desk, you see two blue booklets, two purple booklets, and two yellow pairs of sunglasses - "
                      "if I remove all the pairs of sunglasses from the desk, how many purple items remain on it?"],
            inputs=message
        )

    with gr.Tab("Settings"):
        tools_cb_group = gr.CheckboxGroup(label="Tools:", choices=TOOLS_LIST,
                                          value=TOOLS_DEFAULT_LIST)
        tools_cb_group.change(update_selected_tools,
                              inputs=[tools_cb_group, tools_list_state, llm_state],
                              outputs=[tools_list_state, llm_state, chain_state, express_chain_state])

        trace_chain_cb = gr.Checkbox(label="Show reasoning chain in chat bubble", value=False)
        trace_chain_cb.change(update_foo, inputs=[trace_chain_cb, trace_chain_state],
                              outputs=[trace_chain_state])

        speak_text_cb = gr.Checkbox(label="Speak text from agent", value=False)
        speak_text_cb.change(update_foo, inputs=[speak_text_cb, speak_text_state],
                             outputs=[speak_text_state])

    with gr.Tab("Formality"):
        formality_radio = gr.Radio(label="Formality:",
                                   choices=[FORMALITY_DEFAULT, "Casual", "Polite", "Honorific"],
                                   value=FORMALITY_DEFAULT)
        formality_radio.change(update_foo,
                               inputs=[formality_radio, formality_state],
                               outputs=[formality_state])

    with gr.Tab("Translate to"):
        translate_to_radio = gr.Radio(label="Translate to:", choices=[
            TRANSLATE_TO_DEFAULT, "Arabic", "Arabic (Gulf)", "Catalan", "Chinese (Cantonese)", "Chinese (Mandarin)",
            "Danish", "Dutch", "English (Australian)", "English (British)", "English (Indian)", "English (New Zealand)",
            "English (South African)", "English (US)", "English (Welsh)", "Finnish", "French", "French (Canadian)",
            "German", "German (Austrian)", "Georgian", "Hindi", "Icelandic", "Indonesian", "Italian", "Japanese", "Korean", "Norwegian", "Polish",
            "Portuguese (Brazilian)", "Portuguese (European)", "Romanian", "Russian", "Spanish (European)",
            "Spanish (Mexican)", "Spanish (US)", "Swedish", "Turkish", "Ukrainian", "Welsh",
            "emojis", "Gen Z slang", "how the stereotypical Karen would say it", "Klingon",
            "Pirate", "Strange Planet expospeak technical talk", "Yoda"],
                                      value=TRANSLATE_TO_DEFAULT)

        translate_to_radio.change(update_foo,
                                  inputs=[translate_to_radio, translate_to_state],
                                  outputs=[translate_to_state])

    with gr.Tab("Lit style"):
        literary_style_radio = gr.Radio(label="Literary style:", choices=[
            LITERARY_STYLE_DEFAULT, "Prose", "Summary", "Outline", "Bullets", "Poetry", "Haiku", "Limerick", "Joke",
            "Knock-knock"],
                                        value=LITERARY_STYLE_DEFAULT)

        literary_style_radio.change(update_foo,
                                    inputs=[literary_style_radio, literary_style_state],
                                    outputs=[literary_style_state])

    with gr.Tab("Emotions"):
        anticipation_level_radio = gr.Radio(label="Anticipation level:",
                                            choices=[EMOTION_DEFAULT, "Interest", "Anticipation", "Vigilance"],
                                            value=EMOTION_DEFAULT)
        anticipation_level_radio.change(update_foo,
                                        inputs=[anticipation_level_radio, anticipation_level_state],
                                        outputs=[anticipation_level_state])

        joy_level_radio = gr.Radio(label="Joy level:",
                                   choices=[EMOTION_DEFAULT, "Serenity", "Joy", "Ecstasy"],
                                   value=EMOTION_DEFAULT)
        joy_level_radio.change(update_foo,
                               inputs=[joy_level_radio, joy_level_state],
                               outputs=[joy_level_state])

        trust_level_radio = gr.Radio(label="Trust level:",
                                     choices=[EMOTION_DEFAULT, "Acceptance", "Trust", "Admiration"],
                                     value=EMOTION_DEFAULT)
        trust_level_radio.change(update_foo,
                                 inputs=[trust_level_radio, trust_level_state],
                                 outputs=[trust_level_state])

        fear_level_radio = gr.Radio(label="Fear level:",
                                    choices=[EMOTION_DEFAULT, "Apprehension", "Fear", "Terror"],
                                    value=EMOTION_DEFAULT)
        fear_level_radio.change(update_foo,
                                inputs=[fear_level_radio, fear_level_state],
                                outputs=[fear_level_state])

        surprise_level_radio = gr.Radio(label="Surprise level:",
                                        choices=[EMOTION_DEFAULT, "Distraction", "Surprise", "Amazement"],
                                        value=EMOTION_DEFAULT)
        surprise_level_radio.change(update_foo,
                                    inputs=[surprise_level_radio, surprise_level_state],
                                    outputs=[surprise_level_state])

        sadness_level_radio = gr.Radio(label="Sadness level:",
                                       choices=[EMOTION_DEFAULT, "Pensiveness", "Sadness", "Grief"],
                                       value=EMOTION_DEFAULT)
        sadness_level_radio.change(update_foo,
                                   inputs=[sadness_level_radio, sadness_level_state],
                                   outputs=[sadness_level_state])

        disgust_level_radio = gr.Radio(label="Disgust level:",
                                       choices=[EMOTION_DEFAULT, "Boredom", "Disgust", "Loathing"],
                                       value=EMOTION_DEFAULT)
        disgust_level_radio.change(update_foo,
                                   inputs=[disgust_level_radio, disgust_level_state],
                                   outputs=[disgust_level_state])

        anger_level_radio = gr.Radio(label="Anger level:",
                                     choices=[EMOTION_DEFAULT, "Annoyance", "Anger", "Rage"],
                                     value=EMOTION_DEFAULT)
        anger_level_radio.change(update_foo,
                                 inputs=[anger_level_radio, anger_level_state],
                                 outputs=[anger_level_state])

    with gr.Tab("Max words"):
        num_words_slider = gr.Slider(label="Max number of words to generate (0 for don't care)",
                                     value=NUM_WORDS_DEFAULT, minimum=0, maximum=MAX_WORDS, step=10)
        num_words_slider.change(update_foo,
                                inputs=[num_words_slider, num_words_state],
                                outputs=[num_words_state])

    gr.HTML("""
    This application, developed by <a href='https://www.linkedin.com/in/javafxpert/'>James L. Weaver</a>, 
    demonstrates a conversational agent implemented with OpenAI GPT-3.5 and LangChain. 
    When necessary, it leverages tools for complex math, searching the internet, and accessing news and weather.""")

    gr.HTML("<center>Powered by <a href='https://github.com/hwchase17/langchain'>LangChain 🦜️🔗</a></center>")

    message.submit(chat, inputs=[openai_api_key_textbox, message, history_state, chain_state, trace_chain_state, speak_text_state,
                                 express_chain_state, num_words_state, formality_state,
                                 anticipation_level_state, joy_level_state, trust_level_state, fear_level_state,
                                 surprise_level_state, sadness_level_state, disgust_level_state, anger_level_state,
                                 translate_to_state, literary_style_state],
                   # outputs=[chatbot, history_state, video_html, my_file, message])
                   outputs=[chatbot, history_state, audio_html, tmp_aud_file, message]
                   )

    

    submit.click(chat, inputs=[openai_api_key_textbox, message, history_state, chain_state, trace_chain_state, speak_text_state,
                               express_chain_state, num_words_state, formality_state,
                               anticipation_level_state, joy_level_state, trust_level_state, fear_level_state,
                               surprise_level_state, sadness_level_state, disgust_level_state, anger_level_state,
                               translate_to_state, literary_style_state],
                 # outputs=[chatbot, history_state, video_html, my_file, message])
                 outputs=[chatbot, history_state, audio_html, tmp_aud_file, message])

    message.change(set_openai_api_key,
                                  inputs=[openai_api_key_textbox],
                                  outputs=[chain_state, express_chain_state, llm_state])

    openai_api_key_textbox.change(set_openai_api_key,
                                  inputs=[openai_api_key_textbox],
                                  outputs=[chain_state, express_chain_state, llm_state])

block.launch(debug=True)