# Copyright 2025 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import asyncio
from google.adk.agents import LlmAgent
from google.adk.runners import Runner
from google.adk.sessions import InMemorySessionService
from google.adk.code_executors import BuiltInCodeExecutor
from google.genai import types

AGENT_NAME = "calculator_agent"
APP_NAME = "calculator"
USER_ID = "user1234"
SESSION_ID = "session_code_exec_async"
GEMINI_MODEL = "gemini-2.0-flash"

# Agent Definition
code_agent = LlmAgent(
    name=AGENT_NAME,
    model=GEMINI_MODEL,
    code_executor=BuiltInCodeExecutor(),
    instruction="""You are a calculator agent.
    When given a mathematical expression, write and execute Python code to calculate the result.
    Return only the final numerical result as plain text, without markdown or code blocks.
    """,
    description="Executes Python code to perform calculations.",
)

# Session and Runner
session_service = InMemorySessionService()
session = asyncio.run(session_service.create_session(
    app_name=APP_NAME, user_id=USER_ID, session_id=SESSION_ID
))
runner = Runner(agent=code_agent, app_name=APP_NAME,
                session_service=session_service)

# Agent Interaction (Async)
async def call_agent_async(query):
    content = types.Content(role="user", parts=[types.Part(text=query)])
    print(f"\n--- Running Query: {query} ---")
    final_response_text = "No final text response captured."
    try:
        # Use run_async
        async for event in runner.run_async(
            user_id=USER_ID, session_id=SESSION_ID, new_message=content
        ):
            print(f"Event ID: {event.id}, Author: {event.author}")

            # --- Check for specific parts FIRST ---
            has_specific_part = False
            if event.content and event.content.parts:
                for part in event.content.parts:  # Iterate through all parts
                    if part.executable_code:
                        # Access the actual code string via .code
                        print(
                            f"  Debug: Agent generated code:\n```python\n{part.executable_code.code}\n```"
                        )
                        has_specific_part = True
                    elif part.code_execution_result:
                        # Access outcome and output correctly
                        print(
                            f"  Debug: Code Execution Result: {part.code_execution_result.outcome} - Output:\n{part.code_execution_result.output}"
                        )
                        has_specific_part = True
                    # Also print any text parts found in any event for debugging
                    elif part.text and not part.text.isspace():
                        print(f"  Text: '{part.text.strip()}'")
                        # Do not set has_specific_part=True here, as we want the final response logic below

            # --- Check for final response AFTER specific parts ---
            # Only consider it final if it doesn't have the specific code parts we just handled
            if not has_specific_part and event.is_final_response():
                if (
                    event.content
                    and event.content.parts
                    and event.content.parts[0].text
                ):
                    final_response_text = event.content.parts[0].text.strip()
                    print(f"==> Final Agent Response: {final_response_text}")
                else:
                    print(
                        "==> Final Agent Response: [No text content in final event]")

    except Exception as e:
        print(f"ERROR during agent run: {e}")
    print("-" * 30)


# Main async function to run the examples
async def main():
    await call_agent_async("Calculate the value of (5 + 7) * 3")
    await call_agent_async("What is 10 factorial?")


# Execute the main async function
try:
    asyncio.run(main())
except RuntimeError as e:
    # Handle specific error when running asyncio.run in an already running loop (like Jupyter/Colab)
    if "cannot be called from a running event loop" in str(e):
        print("\nRunning in an existing event loop (like Colab/Jupyter).")
        print("Please run `await main()` in a notebook cell instead.")
        # If in an interactive environment like a notebook, you might need to run:
        # await main()
    else:
        raise e  # Re-raise other runtime errors