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import streamlit as st
import PyPDF2
import openai
import faiss
import os
import numpy as np
from sklearn.feature_extraction.text import TfidfVectorizer
from sklearn.metrics.pairwise import cosine_similarity
from io import StringIO

# Function to extract text from a PDF file
def extract_text_from_pdf(pdf_file):
    reader = PyPDF2.PdfReader(pdf_file)
    text = ""
    for page in reader.pages:
        text += page.extract_text()
    return text

# Function to generate embeddings for a piece of text
def get_embeddings(text, model="text-embedding-ada-002"):
    response = openai.Embedding.create(input=[text], model=model)
    return response['data'][0]['embedding']

# Function to search for similar content
def search_similar(query_embedding, index, stored_texts, top_k=3):
    distances, indices = index.search(np.array([query_embedding]), top_k)
    results = [(stored_texts[i], distances[0][idx]) for idx, i in enumerate(indices[0])]
    return results

# Function to generate code based on a prompt
def generate_code_from_prompt(prompt, model="gpt-4o-mini"):
    response = openai.ChatCompletion.create(
        model=model,
        messages=[{"role": "user", "content": prompt}]
    )
    return response['choices'][0]['message']['content']

# Function to save code to a .txt file
def save_code_to_file(code, filename="generated_code.txt"):
    with open(filename, "w") as f:
        f.write(code)

# Function to generate AI-based study notes and summaries
def generate_summary(text):
    prompt = f"Summarize the following text into key points:\n\n{text}"
    response = openai.ChatCompletion.create(
        model="gpt-4o-mini",
        messages=[{"role": "user", "content": prompt}]
    )
    return response['choices'][0]['message']['content']

# Function to fix bugs in code
def fix_code_bugs(buggy_code, model="gpt-4o-mini"):
    prompt = f"The following code has bugs or issues. Please identify and fix the problems. If possible, provide explanations for the changes made.\n\nBuggy Code:\n{buggy_code}\n\nFixed Code:"
    response = openai.ChatCompletion.create(
        model=model,
        messages=[{"role": "user", "content": prompt}]
    )
    return response['choices'][0]['message']['content']

# Function to generate AI-based mathematical solutions
def generate_math_solution(query):
    prompt = f"Explain and solve the following mathematical problem step by step: {query}"
    response = openai.ChatCompletion.create(
        model="gpt-3.5-turbo",
        messages=[{"role": "user", "content": prompt}]
    )
    return response['choices'][0]['message']['content']
   
from PIL import Image  # Required for local image files

# Streamlit app starts here
st.set_page_config(page_title="AI Assistance", page_icon=":robot:", layout="wide")

# Display a logo or icon
image = Image.open("14313824.png")  # Path to your image file
st.image(image, width=200)  # You can adjust the width as needed

# Streamlit app starts here
st.title("AI Assistance")

# Input OpenAI API key
openai_api_key = st.text_input("Enter your OpenAI API key:", type="password")

if openai_api_key:
    openai.api_key = openai_api_key

    # Sidebar to toggle between Course Query Assistant, Code Generator, Bug Fixer, etc.
    st.sidebar.title("Select Mode")
    mode = st.sidebar.radio("Choose an option", (
        "Course Query Assistant", 
        "Code Generator", 
        "AI Chatbot Tutor", 
        "AI Study Notes & Summaries", 
        "Code Bug Fixer",
        "Mathematics Assistant",  # Added option for Math
        "Biology Assistant",      # Added option for Biology
        "Chemistry Assistant",    # Added option for Chemistry
        "Physics Assistant",       # Added option for Physics
        "Voice Chat",
        "Image Chat",
        "English To Japanese",
        "Text to Image Generator",
        "Graph Tutorial",
        "Text-To-Diagram-Generator"
    ))

    # Add Contact information in the sidebar
    st.sidebar.markdown("""
        ## Contact
    
        For any questions or issues, please contact:
    
        - **Email**: [[email protected]](mailto:[email protected])
        - **GitHub**: [Click here to access the Github Profile](https://github.com/shukdevtroy)
        - **WhatsApp**: [Click here to chat](https://wa.me/+8801719296601)
        - **HuggingFace Profile**: [Click here to access the HuggingFace Profile](https://huggingface.co/shukdevdatta123)
    """)

    if mode == "Course Query Assistant":
        st.header("Course Query Assistant")

        # Display image/logo in the "Course Query Assistant" section (optional)
        course_query_image = Image.open("Capture.PNG")  # Ensure the file is in the correct directory
        st.image(course_query_image, width=150)  # Adjust the size as per preference

        # Upload course materials
        uploaded_files = st.file_uploader("Upload Course Materials (PDFs)", type=["pdf"], accept_multiple_files=True)

        if uploaded_files:
            st.write("Processing uploaded course materials...")

            # Extract text and generate embeddings for all uploaded PDFs
            course_texts = []
            for uploaded_file in uploaded_files:
                text = extract_text_from_pdf(uploaded_file)
                course_texts.append(text)

            # Combine all course materials into one large text
            combined_text = " ".join(course_texts)

            # Split combined text into smaller chunks for embedding (max tokens ~1000)
            chunks = [combined_text[i:i+1000] for i in range(0, len(combined_text), 1000)]

            # Generate embeddings for all chunks
            embeddings = [get_embeddings(chunk) for chunk in chunks]

            # Convert the list of embeddings into a NumPy array (shape: [num_chunks, embedding_size])
            embeddings_np = np.array(embeddings).astype("float32")

            # Create a FAISS index for similarity search
            index = faiss.IndexFlatL2(len(embeddings_np[0]))  # Use the length of the embedding vectors for the dimension
            index.add(embeddings_np)

            st.write("Course materials have been processed and indexed.")

            # User query
            query = st.text_input("Enter your question about the course materials:")

            if query:
                # Generate embedding for the query
                query_embedding = get_embeddings(query)

                # Search for similar chunks in the FAISS index
                results = search_similar(query_embedding, index, chunks)

                # Create the context for the GPT prompt
                context = "\n".join([result[0] for result in results])
                modified_prompt = f"Context: {context}\n\nQuestion: {query}\n\nProvide a detailed answer based on the context."

                # Get the GPT-4 response
                response = openai.ChatCompletion.create(
                    model="gpt-4o-mini",  # Update to GPT-4 (or your desired model)
                    messages=[{"role": "user", "content": modified_prompt}]
                )

                # Get the response content
                response_content = response['choices'][0]['message']['content']

                # Display the response in Streamlit (Intelligent Reply)
                st.write("### Intelligent Reply:")
                st.write(response_content)

    elif mode == "Code Generator":
        st.header("Code Generator")

        # Display image/logo in the "Course Query Assistant" section (optional)
        codegen = Image.open("9802381.png")  # Ensure the file is in the correct directory
        st.image(codegen, width=150)  # Adjust the size as per preference

        # Code generation prompt input
        code_prompt = st.text_area("Describe the code you want to generate:", 
                                   "e.g., Write a Python program that generates Fibonacci numbers.")
        
        if st.button("Generate Code"):
            if code_prompt:
                with st.spinner("Generating code..."):
                    # Generate code using GPT-4
                    generated_code = generate_code_from_prompt(code_prompt)
                    
                    # Clean the generated code to ensure only code is saved (removing comments or additional text)
                    clean_code = "\n".join([line for line in generated_code.splitlines() if not line.strip().startswith("#")])

                    # Save the clean code to a file
                    save_code_to_file(clean_code)

                    # Display the generated code
                    st.write("### Generated Code:")
                    st.code(clean_code, language="python")

                    # Provide a download link for the generated code
                    with open("generated_code.txt", "w") as f:
                        f.write(clean_code)

                    st.download_button(
                        label="Download Generated Code",
                        data=open("generated_code.txt", "rb").read(),
                        file_name="generated_code.txt",
                        mime="text/plain"
                    )
            else:
                st.error("Please provide a prompt to generate the code.")

    elif mode == "AI Chatbot Tutor":
        st.header("AI Chatbot Tutor")

        # Display image/logo in the "Course Query Assistant" section (optional)
        aitut = Image.open("910372.png")  # Ensure the file is in the correct directory
        st.image(aitut, width=150)  # Adjust the size as per preference

        # Chat interface for the AI tutor
        chat_history = []

        def chat_with_bot(query):
            chat_history.append({"role": "user", "content": query})
            response = openai.ChatCompletion.create(
                model="gpt-4o-mini",
                messages=chat_history
            )
            chat_history.append({"role": "assistant", "content": response['choices'][0]['message']['content']})
            return response['choices'][0]['message']['content']

        user_query = st.text_input("Ask a question:")

        if user_query:
            with st.spinner("Getting answer..."):
                bot_response = chat_with_bot(user_query)
                st.write(f"### AI Response: {bot_response}")

    elif mode == "AI Study Notes & Summaries":
        st.header("AI Study Notes & Summaries")

        # Display image/logo in the "Course Query Assistant" section (optional)
        aisum = Image.open("sum.png")  # Ensure the file is in the correct directory
        st.image(aisum, width=150)  # Adjust the size as per preference

        # Upload course materials for summarization
        uploaded_files_for_summary = st.file_uploader("Upload Course Materials (PDFs) for Summarization", type=["pdf"], accept_multiple_files=True)

        if uploaded_files_for_summary:
            st.write("Generating study notes and summaries...")

            # Extract text from PDFs
            all_text = ""
            for uploaded_file in uploaded_files_for_summary:
                text = extract_text_from_pdf(uploaded_file)
                all_text += text

            # Generate summary using AI
            summary = generate_summary(all_text)

            # Display the summary
            st.write("### AI-Generated Summary:")
            st.write(summary)

    elif mode == "Code Bug Fixer":
        st.header("Code Bug Fixer")

        # Display image/logo in the "Course Query Assistant" section (optional)
        aibug = Image.open("bug.png")  # Ensure the file is in the correct directory
        st.image(aibug, width=150)  # Adjust the size as per preference

        # User input for buggy code
        buggy_code = st.text_area("Enter your buggy code here:")

        if st.button("Fix Code"):
            if buggy_code:
                with st.spinner("Fixing code..."):
                    # Fix bugs using GPT-4
                    fixed_code = fix_code_bugs(buggy_code)
                    
                    # Display the fixed code
                    st.write("### Fixed Code:")
                    st.code(fixed_code, language="python")

                    # Provide a download link for the fixed code
                    with open("fixed_code.txt", "w") as f:
                        f.write(fixed_code)

                    st.download_button(
                        label="Download Fixed Code",
                        data=open("fixed_code.txt", "rb").read(),
                        file_name="fixed_code.txt",
                        mime="text/plain"
                    )
            else:
                st.error("Please enter some buggy code to fix.")

    elif mode == "Mathematics Assistant":
        st.header("Mathematics Assistant")

        # Display image/logo in the "Mathematics Assistant" section (optional)
        math_icon = Image.open("math_icon.PNG")  # Ensure the file is in the correct directory
        st.image(math_icon, width=150)  # Adjust the size as per preference

        # User input for math questions
        math_query = st.text_input("Ask a mathematics-related question:")

        if st.button("Solve Problem"):
            if math_query:
                with st.spinner("Generating solution..."):
                    # Generate the solution using GPT-4
                    solution = generate_math_solution(math_query)

                    # Render the solution with LaTeX for mathematical notations
                    formatted_solution = f"""
                    ### Solution to the Problem
                    **Problem:** {math_query}
                    **Solution:**
                    {solution}
                    """

                    st.markdown(formatted_solution)
            else:
                st.error("Please enter a math problem to solve.")

    # **New Section: Biology Assistant**
    elif mode == "Biology Assistant":
        st.header("Biology Assistant")

        # Display image/logo in the "Biology Assistant" section (optional)
        bio_icon = Image.open("bio_icon.PNG")  # Ensure the file is in the correct directory
        st.image(bio_icon, width=150)  # Adjust the size as per preference

        # User input for biology questions
        bio_query = st.text_input("Ask a biology-related question:")

        if bio_query:
            with st.spinner("Getting answer..."):
                prompt = f"Answer the following biology question: {bio_query}"
                response = openai.ChatCompletion.create(
                    model="gpt-4o-mini",
                    messages=[{"role": "user", "content": prompt}]
                )
                answer = response['choices'][0]['message']['content']
                st.write(f"### Answer: {answer}")

    # **New Section: Chemistry Assistant**
    elif mode == "Chemistry Assistant":
        st.header("Chemistry Assistant")

        # Display image/logo in the "Chemistry Assistant" section (optional)
        chem_icon = Image.open("chem.PNG")  # Ensure the file is in the correct directory
        st.image(chem_icon, width=150)  # Adjust the size as per preference

        # User input for chemistry questions
        chem_query = st.text_input("Ask a chemistry-related question:")

        if chem_query:
            with st.spinner("Getting answer..."):
                prompt = f"Answer the following chemistry question: {chem_query}"
                response = openai.ChatCompletion.create(
                    model="gpt-4o-mini",
                    messages=[{"role": "user", "content": prompt}]
                )
                answer = response['choices'][0]['message']['content']
                st.write(f"### Answer: {answer}")

    # **New Section: Physics Assistant**
    elif mode == "Physics Assistant":
        st.header("Physics Assistant")

        # Display image/logo in the "Physics Assistant" section (optional)
        phys_icon = Image.open("physics_icon.PNG")  # Ensure the file is in the correct directory
        st.image(phys_icon, width=150)  # Adjust the size as per preference

        # User input for physics questions
        phys_query = st.text_input("Ask a physics-related question:")

        if phys_query:
            with st.spinner("Getting answer..."):
                prompt = f"Answer the following physics question: {phys_query}"
                response = openai.ChatCompletion.create(
                    model="gpt-3.5-turbo",
                    messages=[{"role": "user", "content": prompt}]
                )
                answer = response['choices'][0]['message']['content']
                st.write(f"### Answer: {answer}")

    # **New Section: Voice Chat**
    elif mode == "Voice Chat":
        st.header("Voice Chat")

        # Display a description or instructions
        st.write("Click the button below to go to the Voice Chat.")

        # Display image/logo in the "Physics Assistant" section (optional)
        gif = "200w.gif"  # Ensure the file is in the correct directory
        st.image(gif,  use_container_width=50)  # Adjust the size as per preference

        # Button to navigate to the external voice chat link
        if st.button("Go to Voice Chat"):
            st.write("Redirecting to the voice chat...")  # You can customize this message
            st.markdown(f'<a href="https://shukdevdatta123-voicechat.hf.space" target="_blank">Go to Voice Chat</a>', unsafe_allow_html=True)

    # **New Section: Image Chat**
    elif mode == "Image Chat":

        # Display image/logo in the "Physics Assistant" section (optional)
        imgc = Image.open("i.jpg")  # Ensure the file is in the correct directory
        st.image(imgc, width=150)  # Adjust the size as per preference
        
        st.header("Image Chat")

        # Display a description or instructions
        st.write("Click the button below to go to the Image Chat.")

        # Display image/logo in the "Physics Assistant" section (optional)
        gif = "200w.gif"  # Ensure the file is in the correct directory
        st.image(gif,  use_container_width=50)  # Adjust the size as per preference

        # Button to navigate to the external voice chat link
        if st.button("Go to Image Chat"):
            st.write("Redirecting to the image chat...")  # You can customize this message
            st.markdown(f'<a href="https://imagechat2278.streamlit.app/" target="_blank">Go to Image Chat</a>', unsafe_allow_html=True)

        # Button to navigate to the alternative app (alternative)
        if st.button("Go to Image Chat (Alternative App)"):
            st.write("Redirecting to the alternative image chat...")  # You can customize this message
            st.markdown(f'<a href="https://imagechat.onrender.com/" target="_blank">Go to Image Chat (Alternative App)</a>', unsafe_allow_html=True)

    # **New Section: English To Japanese**
    elif mode == "English To Japanese":
        st.header("English To Japanese")

        # Display a description or instructions
        st.write("Click the button below to go to the English To Japanese Translator.")


        gif = "200w.gif"  # Ensure the file is in the correct directory
        st.image(gif,  use_container_width=150)  # Adjust the size as per preference

        # Button to navigate to the external voice chat link
        if st.button("Go to English To Japanese Translator"):
            st.write("Redirecting to the English To Japanese Translator...")  # You can customize this message
            st.markdown(f'<a href="https://shukdevdatta123-engtojap-2-0.hf.space" target="_blank">Go to English To Japanese Translator</a>', unsafe_allow_html=True)

    # **New Section: Text to Image Generator**
    elif mode == "Text to Image Generator":
        st.header("Text to Image Generator")

        # Display a description or instructions
        st.write("Click the button below to go to the Text to Image Generator.")


        gif = "200w.gif"  # Ensure the file is in the correct directory
        st.image(gif,  use_container_width=150)  # Adjust the size as per preference

        # Button to navigate to the external voice chat link
        if st.button("Go to Text to Image Generator"):
            st.write("Redirecting to the Text to Image Generator...")  # You can customize this message
            st.markdown(f'<a href="https://shukdevdatta123-image-generator-dall-e3.hf.space" target="_blank">Go to Text to Image Generator</a>', unsafe_allow_html=True)
            
    # **New Section: Graph Tutorial**
    elif mode == "Graph Tutorial":
        st.header("Graph Tutorial")

        # Display a description or instructions
        st.write("Click the button below to go to Graph Tutorial.")


        gif = "200w.gif"  # Ensure the file is in the correct directory
        st.image(gif,  use_container_width=150)  # Adjust the size as per preference

        # Button to navigate to the external voice chat link
        if st.button("Go to Graph Tutorial"):
            st.write("Redirecting to Graph Tutorial...")  # You can customize this message
            st.markdown(f'<a href="https://shukdevdatta123-networkx-tutorial.hf.space" target="_blank">Go to Graph Tutorial</a>', unsafe_allow_html=True)

    # **New Section: Text-To-Diagram-Generator**
    elif mode == "Text-To-Diagram-Generator":
        st.header("Text-To-Diagram-Generator")

        # Display a description or instructions
        st.write("Click the button below to go to Text-To-Diagram-Generator.")


        gif = "200w.gif"  # Ensure the file is in the correct directory
        st.image(gif,  use_container_width=150)  # Adjust the size as per preference

        # Button to navigate to the external voice chat link
        if st.button("Go to Text-To-Diagram-Generator"):
            st.write("Redirecting to Text-To-Diagram-Generator...")  # You can customize this message
            st.markdown(f'<a href="https://shukdevdatta123-text-2-diagram.hf.space" target="_blank">Go to Text-To-Diagram-Generator</a>', unsafe_allow_html=True)