app.py

from flask import Flask, request, jsonify
from flask_cors import CORS
from transformers import pipeline

app = Flask(__name__)
CORS(app)  # Allow requests from the HTML frontend

# Load model once on startup (same model as original Streamlit project)
print("Loading model... (this may take a minute on first run)")
nlp = pipeline(
    "sentiment-analysis",
    model="w11wo/indonesian-roberta-base-sentiment-classifier"
)
print("Model loaded! Server ready.")


@app.route("/analyze", methods=["POST"])
def analyze():
    data = request.get_json()
    comments = data.get("comments", [])

    if not comments:
        return jsonify({"error": "No comments provided"}), 400

    if len(comments) > 10:
        comments = comments[:10]

    results = []
    for text in comments:
        try:
            prediction = nlp(text)
            label = prediction[0]["label"]   # e.g. "positive"
            score = prediction[0]["score"]

            # Normalize label to Title Case
            label_map = {"positive": "Positive", "negative": "Negative", "neutral": "Neutral"}
            sentiment = label_map.get(label.lower(), label.capitalize())

            results.append({
                "comment": text,
                "sentiment": sentiment,
                "score": round(score, 4)
            })
        except Exception as e:
            results.append({
                "comment": text,
                "sentiment": "Neutral",
                "score": 0.5,
                "error": str(e)
            })

    return jsonify({"results": results})


@app.route("/health", methods=["GET"])
def health():
    return jsonify({"status": "ok", "model": "w11wo/indonesian-roberta-base-sentiment-classifier"})


@app.route("/", methods=["GET"])
def index():
    return jsonify({
        "name": "SentiMind API",
        "description": "Indonesian Sentiment Analysis API",
        "endpoints": {
            "POST /analyze": "Analyze sentiment of comments",
            "GET /health": "Check server status"
        }
    })


# Hugging Face Spaces uses port 7860
if __name__ == "__main__":
    app.run(host="0.0.0.0", port=7860, debug=False)