Update app.py with latest changes

app.py

@@ -7,17 +7,127 @@ import pandas as pd
 # (Keep Constants as is)
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
+OPENROUTER_API_KEY=os.getenv("OPENROUTER_API_KEY") # Get OpenRouter API key from environment variable
 
 # --- Basic Agent Definition ---
 # ----- THIS IS WERE YOU CAN BUILD WHAT YOU WANT ------
+from smolagents import (
+    CodeAgent,
+    LiteLLMModel,
+    tool,
+    DuckDuckGoSearchTool,
+    VisitWebpageTool,
+    PythonInterpreterTool
+)
+
+import wikipedia
+
+
+# ----------------------------
+# Custom Tool 1 - Wikipedia
+# ----------------------------
+@tool
+def wikipedia_search(query: str) -> str:
+    """
+    Search Wikipedia and return a concise summary.
+    """
+    try:
+        return wikipedia.summary(query, sentences=5)
+    except Exception as e:
+        return f"Wikipedia error: {e}"
+
+
+# ----------------------------
+# Custom Tool 2 - Current Date
+# ----------------------------
+@tool
+def current_date() -> str:
+    """
+    Returns the current date and time.
+    """
+    from datetime import datetime
+
+    return datetime.utcnow().isoformat()
+
+
+# ----------------------------
+# Custom Tool 3 - Calculator
+# ----------------------------
+@tool
+def calculator(expression: str) -> str:
+    """
+    Evaluate a mathematical expression.
+    Example:
+    2+2
+    (5*7)/3
+    """
+    try:
+        return str(eval(expression))
+    except Exception as e:
+        return f"Calculation error: {e}"
+
+
+# ----------------------------
+# Basic Agent
+# ----------------------------
 class BasicAgent:
+
     def __init__(self):
-        print("BasicAgent initialized.")
+
+        print("Initializing SmolAgent...")
+
+        self.model = LiteLLMModel(
+            model_id="openrouter/anthropic/claude-sonnet-4"
+            # alternatively:
+            # model_id="openrouter/openai/gpt-4.1"
+        )
+
+        self.agent = CodeAgent(
+            tools=[
+                DuckDuckGoSearchTool(),
+                VisitWebpageTool(),
+                PythonInterpreterTool(),
+                wikipedia_search,
+                current_date,
+                calculator,
+            ],
+            model=self.model,
+            add_base_tools=True,
+            planning_interval=3,
+            max_steps=15
+        )
+
+        print("SmolAgent ready.")
+
     def __call__(self, question: str) -> str:
-        print(f"Agent received question (first 50 chars): {question[:50]}...")
-        fixed_answer = "This is a default answer."
-        print(f"Agent returning fixed answer: {fixed_answer}")
-        return fixed_answer
+
+        print(f"Question: {question[:100]}")
+
+        try:
+
+            answer = self.agent.run(
+                f"""
+                You are solving a benchmark task.
+
+                Use tools whenever necessary.
+                Search before guessing.
+                Use Python for calculations.
+                Verify facts using search.
+
+                Question:
+                {question}
+
+                Return only the final answer.
+                """
+            )
+
+            return str(answer)
+
+        except Exception as e:
+
+            print(f"Agent error: {e}")
+
+            return f"Agent Error: {e}"
 
 def run_and_submit_all( profile: gr.OAuthProfile | None):
     """