app.py

import streamlit as st
from code_reviewer import review_code
from pr_fetcher import fetch_pr_diff

st.set_page_config(page_title="Code Review Agent", layout="centered")
st.title("🤖 Code Review Agent (Hugging Face Edition)")

st.subheader("1️⃣ Paste code or diff manually:")
code = st.text_area("Paste your code diff or snippet here 👇", height=300)

st.subheader("2️⃣ Or fetch from a GitHub Pull Request:")
repo_owner = st.text_input("GitHub Repo Owner", placeholder="e.g. openai")
repo_name = st.text_input("GitHub Repo Name", placeholder="e.g. gpt-code-review")
pr_number = st.number_input("PR Number", min_value=1, step=1)
github_token = st.text_input("GitHub Token (optional if public repo)", type="password")

if st.button("Fetch from GitHub PR"):
    with st.spinner("Fetching PR diff..."):
        diff_text = fetch_pr_diff(repo_owner, repo_name, pr_number, github_token)

    if diff_text.startswith("Error"):
        st.error(diff_text)
    else:
        st.success("Fetched PR diff successfully!")
        code = diff_text  # Fill into the text area
        st.code(diff_text, language="diff")

if st.button("Review Code"):
    if code.strip():
        with st.spinner("Analyzing with Hugging Face model..."):
            feedback = review_code(code)
            st.success("Code Review:")
            st.markdown(feedback)
    else:
        st.warning("Please enter or fetch some code first.")