app.py

import streamlit as st
from PIL import Image
import io
import base64
import uuid

# Assuming google.generativeai is correctly imported as genai and the API key is set
import google.generativeai as genai

api_key = "AIzaSyC70u1sN87IkoxOoIj4XCAPw97ae2LZwNM"  # Replace with your actual API key
genai.configure(api_key=api_key)

generation_config = genai.GenerationConfig(
    temperature=0.9,
    max_output_tokens=3000
)

safety_settings = SAFETY_SETTINGS = [
    {
        "category": "HARM_CATEGORY_DANGEROUS_CONTENT",
        "threshold": "BLOCK_NONE",
    },
    {
        "category": "HARM_CATEGORY_SEXUALLY_EXPLICIT",
        "threshold": "BLOCK_NONE",
    },
    {
        "category": "HARM_CATEGORY_HATE_SPEECH",
        "threshold": "BLOCK_NONE",
    },
    {
        "category": "HARM_CATEGORY_HARASSMENT",
        "threshold": "BLOCK_NONE",
    },
]

if 'chat_history' not in st.session_state:
    st.session_state['chat_history'] = []
if 'file_uploader_key' not in st.session_state:
    st.session_state['file_uploader_key'] = str(uuid.uuid4())
if 'use_vision_model' not in st.session_state:
    st.session_state['use_vision_model'] = False

st.title("Gemini Chatbot")

def get_image_base64(image):
    image = image.convert("RGB")
    buffered = io.BytesIO()
    image.save(buffered, format="JPEG")
    img_str = base64.b64encode(buffered.getvalue()).decode()
    return img_str

def clear_conversation():
    st.session_state['chat_history'] = []
    st.session_state['file_uploader_key'] = str(uuid.uuid4())
    st.session_state['use_vision_model'] = False

def send_message():
    user_input = st.session_state.user_input
    uploaded_files = st.session_state.uploaded_files
    if uploaded_files:
        st.session_state['use_vision_model'] = True
    prompts = []
    for entry in st.session_state['chat_history']:
        for part in entry['parts']:
            if 'text' in part:
                prompts.append(part['text'])
            elif 'data' in part:
                prompts.append("[Image]")
    if user_input:
        prompts.append(user_input)
        st.session_state['chat_history'].append({"role": "user", "parts": [{"text": user_input}]})
    if uploaded_files:
        for uploaded_file in uploaded_files:
            base64_image = get_image_base64(Image.open(uploaded_file))
            prompts.append("[Image]")
            st.session_state['chat_history'].append({
                "role": "user",
                "parts": [{"mime_type": uploaded_file.type, "data": base64_image}]
            })
    model_name = 'gemini-pro-vision' if st.session_state['use_vision_model'] else 'gemini-pro'
    model = genai.GenerativeModel(
        model_name=model_name,
        generation_config=generation_config,
        safety_settings=safety_settings
    )
    chat_history_str = "\n".join(prompts)
    if st.session_state['use_vision_model']:
        prompt_parts = [{"text": chat_history_str}] + [
            {"data": part['data'], "mime_type": "image/jpeg"}
            for entry in st.session_state['chat_history'] for part in entry['parts']
            if 'data' in part
        ]
    else:
        prompt_parts = [{"text": chat_history_str}]
    response = model.generate_content([{"role": "user", "parts": prompt_parts}])
    response_text = response.text if hasattr(response, "text") else "No response text found."
    if response_text:
        st.session_state['chat_history'].append({"role": "model", "parts": [{"text": response_text}]})
    st.session_state.user_input = ''
    st.session_state.uploaded_files = []
    st.session_state.file_uploader_key = str(uuid.uuid4())
    display_chat_history()

def display_chat_history():
    for entry in st.session_state['chat_history']:
        role = entry["role"]
        parts = entry["parts"][0]
        if 'text' in parts:
            st.markdown(f"{role.title()}: {parts['text']}")
        elif 'data' in parts:
            st.image(Image.open(io.BytesIO(base64.b64decode(parts['data']))), caption='Uploaded Image')

def get_chat_history_str():
    chat_history_str = "\n".join(
        f"{entry['role'].title()}: {part['text']}" if 'text' in part 
        else f"{entry['role'].title()}: (Image)"
        for entry in st.session_state['chat_history'] 
        for part in entry['parts']
    )
    return chat_history_str

user_input = st.text_area("Enter your message here:", key="user_input")

uploaded_files = st.file_uploader(
    "Upload images:",
    type=["png", "jpg", "jpeg"],
    accept_multiple_files=True,
    key=st.session_state.file_uploader_key
)

send_button = st.button("Send", on_click=send_message)

clear_button = st.button("Clear Conversation", on_click=clear_conversation)

# Function to download the chat history
def download_chat_history():
    chat_history_str = get_chat_history_str()
    return chat_history_str

# Add a button to download the chat history as a text file
download_button = st.download_button(
    label="Download Chat",
    data=download_chat_history(),
    file_name="chat_history.txt",
    mime="text/plain"
)

# Display the chat history
display_chat_history()

# Ensure the file_uploader widget state is tied to the randomly generated key
st.session_state.uploaded_files = uploaded_files