add gemini llm and api key

app.py

@@ -4,6 +4,10 @@ import requests
 import inspect
 import pandas as pd
 from tools import ReverseTextTool, RunPythonFileTool, download_server
+from llama_index.llms.gemini import Gemini
+import os
+from dotenv import load_dotenv
+
 
 
 # (Keep Constants as is)
@@ -35,6 +39,13 @@ Tool Use Guidelines:
 # ----- THIS IS WERE YOU CAN BUILD WHAT YOU WANT ------
 class BasicAgent:
     def __init__(self):
+        gemini_api_key = os.getenv("GEMINI_API_KEY")
+        if not gemini_api_key:
+            raise ValueError("GEMINI_API_KEY not set in environment variables.")
+        llm = Gemini(
+       model="models/gemini-2.0-flash",
+       api_key=gemini_api_key, 
+        )
         print("BasicAgent initialized.")
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")