from flask import Flask, request, jsonify
import os

app = Flask(__name__)

port = int(os.environ.get("PORT", 4000))

@app.route('/sum', methods=['POST'])
def sum_numbers():
    data = request.get_json()
    num1 = data['num1']
    num2 = data['num2']
    try:
        num1 = float(num1)
        num2 = float(num2)
        result = num1 + num2
        return jsonify({'result': result}), 200
    except ValueError:
        return jsonify({'error': 'Invalid input, please provide valid numbers'}), 400

if __name__ == '__main__':
    app.run(debug=True, port=port)