app.py

import streamlit as st
import joblib
import pandas as pd
import re
import nltk
from nltk.corpus import stopwords
from nltk.stem import WordNetLemmatizer





st.set_page_config(layout="centered")

col1, col2, col3 = st.columns([1, 4, 1])

with col2:
    st.image("images.jpg", use_container_width=True)


# ----------------------------
# NLTK setup
# ----------------------------
nltk.download("stopwords")
nltk.download("wordnet")

stop_words = set(stopwords.words("english"))
lemmatizer = WordNetLemmatizer()

# ----------------------------
# Load trained model
# ----------------------------
model = joblib.load(r"model.pkl")

# ----------------------------
# Streamlit UI
# ----------------------------
st.set_page_config(page_title="Flipkart Sentiment", layout="centered")

st.title("Flipkart Review Sentiment Analysis")
st.write("Enter a review to predict sentiment")

review_text = st.text_area(" Review Text", height=180)

# ----------------------------
# Predict
# ----------------------------
if st.button("Predict Sentiment"):

    if review_text.strip() == "":
        st.warning("Please enter a review")

    else:
        # Clean text (same as training)
        text = review_text.lower()
        text = re.sub(r"[^a-z\s]", "", text)
        words = text.split()
        words = [lemmatizer.lemmatize(w) for w in words if w not in stop_words]
        cleaned_text = " ".join(words)

        # IMPORTANT: numeric columns must exist (use 0 if not provided)
        input_df = pd.DataFrame({
            "review_text": [cleaned_text],
            "up_votes": [0],
            "down_votes": [0]
        })

        prediction = model.predict(input_df)[0]

        if prediction == 1:
            st.success(" Positive Review")
        else:
            st.error(" Negative Review")


st.markdown("</div>", unsafe_allow_html=True)

st.markdown("""
<br>
<div style='text-align:center; padding:12px; background-color:#111111; border-radius:10px;'>
<span style='color:#AAAAAA; font-size:16px;'>
Designed & Developed by <b style='color:#CCCCCC;'>Yedeedya Injeti</b><br>
Under <b style='color:#B8860B;'>Innomatics Research Labs</b>
</span>
</div>
<br>
""", unsafe_allow_html=True)