improved initial check for environment variables

main.py

@@ -7,17 +7,23 @@ from telegram_bot import ChatGPT3TelegramBot
 
 
 def main():
+    # Read .env file
     load_dotenv()
 
+    # Setup logging
     logging.basicConfig(
         format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
         level=logging.INFO
     )
 
-    if 'TELEGRAM_BOT_TOKEN' not in os.environ:
-        logging.error('Telegram bot token not found in environment variables')
+    # Check if the required environment variables are set
+    required_values = ['TELEGRAM_BOT_TOKEN', 'OPENAI_EMAIL', 'OPENAI_PASSWORD']
+    missing_values = [value for value in required_values if os.environ.get(value) is None]
+    if len(missing_values) > 0:
+        logging.error(f'The following environment values are missing in your .env: {", ".join(missing_values)}')
         exit(1)
 
+    # Setup configuration
     chatgpt_config = {
         'email': os.environ['OPENAI_EMAIL'],
         'password': os.environ['OPENAI_PASSWORD'],
@@ -29,6 +35,7 @@ def main():
     }
     debug = os.environ.get('DEBUG', 'true').lower() == 'true'
 
+    # Setup and run ChatGPT and Telegram bot
     gpt3_bot = ChatGPT3Bot(config=chatgpt_config, debug=debug)
     telegram_bot = ChatGPT3TelegramBot(config=telegram_config, gpt3_bot=gpt3_bot)
     telegram_bot.run()