app.py

import streamlit as st
from logic import run_delivery_process
import os

# Page Config
st.set_page_config(page_title="Last-Mile AI", page_icon="📦")

st.title("📦 Logistics Exception Resolver")
st.markdown("Automated Multi-Agent System for Delivery Exceptions")

# Input Section
shipment_id = st.text_input("Enter Shipment ID (e.g., SHP-101):")

if st.button("Run AI Analysis"):
    if not os.getenv("OPENAI_API_KEY"):
        st.error("Please set your OpenAI API Key in the Settings/Secrets!")
    elif shipment_id:
        with st.spinner("Agents are collaborating..."):
            # Call our logic
            result = run_delivery_process(shipment_id)
            
            # Layout results
            st.divider()
            col1, col2 = st.columns(2)
            with col1:
                st.subheader("Decision")
                st.info(f"**Action:** {result['resolution']}")
            with col2:
                st.subheader("Status")
                st.write("✅ Exception Identified" if result['is_exception'] == "YES" else "ℹ️ Routine Event")

            st.subheader("Reasoning (Internal Audit)")
            st.write(result['rationale'])

            st.subheader("Customer Notification")
            st.success(result['customer_message'])
            
            # Link to LangSmith (Optional)
            st.caption("Detailed traces available in LangSmith dashboard.")
    else:
        st.warning("Please enter a Shipment ID to continue.")

st.sidebar.markdown("---")
st.sidebar.write("Developed for Project 3 Solution")