app.py

import streamlit as st
from query_graph import query_graph

# Helper for <details>
def format_citations_html(chunks):
    html = []
    for idx, (hdr, sc, txt, citation) in enumerate(chunks, start=1):
        preamble = (
            f"<p style='font-size:0.9em;'><strong>Preamble:</strong> "
            f"The text in the following detail is reproduced from [{citation}]. "
            f"It had a cosine similarity of {sc:.2f} with the user question, "
            f"and it ranked {idx} among the text chunks in our graph database.</p>"
        )
        body = txt.replace("\n", "<br>")
        html.append(
            f"<details>"
            f"<summary>{hdr} (cosine similarity: {sc:.2f})</summary>"
            f"<div style='font-size:0.9em; margin-top:0.5em;'>"
            f"<strong>Preamble:</strong> The text below is reproduced from {citation}. "
            f"</div>"
            f"<div style='font-size:0.7em; margin-left:1em; margin-top:0.5em;'>{body}</div>"
            f"</details><br><br>"
        )
    return "<br>".join(html)


# Sidebar configuration
st.sidebar.title("About")
st.sidebar.markdown("**Authors:** [The SIGHT Project Team](https://sites.miamioh.edu/sight/)")
st.sidebar.markdown("**Version:** V. 0.0.2")
st.sidebar.markdown("**Date:** July 24, 2025")
st.sidebar.markdown("**Model:** gpt4o")

st.sidebar.markdown("---")
st.sidebar.markdown(
    "**Funding:** SIGHT is funded by [OHBWC WSIC](https://info.bwc.ohio.gov/for-employers/safety-services/workplace-safety-innovation-center/wsic-overview)"
)


# Main interface
st.set_page_config(page_title="Miami University's SIGHT Chatbot")
st.title("Chat with SIGHT")
st.write("Ask questions about machine safeguarding, LOTO, and hazard prevention based on OSHA/CFR's corpus.")

# Example questions toggled in main window
with st.expander("Example Questions", expanded=False):
    st.markdown(
        "- What are general machine guarding requirements?  \n"
        "- How do I perform lockout/tagout?  \n"
        "- Summarize the definition of machine guarding from 29 CFR 1910.211"
    )

# Initialize chat history
if 'history' not in st.session_state:
    st.session_state.history = []

# User input
query = st.text_input("Your question:")
if st.button("Send") and query:
    answer, sources, chunks = query_graph(query)
    st.session_state.history.append({
        'query': query,
        'answer': answer,
        'sources': sources,
        'chunks': chunks
    })

# Display chat history
for entry in st.session_state.history[::-1]:
    st.markdown(f"**You:** {entry['query']}")
    st.markdown(f"**Assistant:** {entry['answer']}")
    st.markdown(format_citations_html(entry['chunks']), unsafe_allow_html=True)


# Footer
st.markdown("---")
st.markdown(
    "**Disclaimer:** *Powered by a Graph RAG to reduce hallucinations; please verify as it can still make mistakes.*"
    )
st.markdown(
    "**Funding:** *We are thankful for [Ohio BWC/WSIC](https://info.bwc.ohio.gov/for-employers/safety-services/workplace-safety-innovation-center/wsic-overview)'s funding that made this chat bot possible.*"
    )