app.py

from flask import Flask, request
import requests
from dotenv import load_dotenv
import os

load_dotenv()

app = Flask(__name__)

# Retrieve environment variables
VERIFY_TOKEN = os.getenv('VERIFY_TOKEN')
PAGE_ACCESS_TOKEN = os.getenv('PAGE_ACCESS_TOKEN')
OPENAI_API_KEY = os.getenv('OPENAI_API_KEY')

# Debugging: Print the loaded environment variables
print(f"VERIFY_TOKEN: {VERIFY_TOKEN}")
print(f"PAGE_ACCESS_TOKEN: {PAGE_ACCESS_TOKEN}")
print(f"OPENAI_API_KEY: {OPENAI_API_KEY}")

# This is API key for facebook messenger.
API = "https://graph.facebook.com/LATEST-API-VERSION/me/messages?access_token="+PAGE_ACCESS_TOKEN

@app.route("/", methods=['GET'])
def fbverify():
    if request.args.get("hub.mode") == "subscribe" and request.args.get("hub.challenge"):
        if not request.args.get("hub.verify_token")== "imseldrith":
            return "Verification token missmatch", 403
        return request.args['hub.challenge'], 200
    return "Hello world", 200
@app.route("/", methods=['POST'])
def fbwebhook():
    data = request.get_json()
    print(data)
    try:
        # Read messages from facebook messanger.
        message = data['entry'][0]['messaging'][0]['message']
        sender_id = data['entry'][0]['messaging'][0]['sender']['id']
        if message['text'] == "hi":
            request_body = {
                "recipient": {
                    "id": sender_id
                },
                "message": {
                    "text": "hello, world!"
                }
            }
            response = requests.post(API, json=request_body).json()
            return response

if __name__ == '__main__':
    app.run(host="0.0.0.0", port=7860, debug=True)