app.py

from smolagents import CodeAgent, DuckDuckGoSearchTool, load_tool, tool, HfApiModel
from tools.final_answer import FinalAnswerTool
import Gradio_UI       # ← we’ll patch its stream_to_gradio
from Gradio_UI import GradioUI

import datetime
import pytz
import yaml

# --- Monkey-patch to guard against None token counts ─────────────
# Wrap the original stream_to_gradio so that None → 0 for token counting
_original_stream = Gradio_UI.stream_to_gradio
def _patched_stream_to_gradio(agent, task, reset_agent_memory=False):
    for msg in _original_stream(agent, task, reset_agent_memory):
        # ensure these are ints
        if agent.model.last_input_token_count is None:
            agent.model.last_input_token_count = 0
        if agent.model.last_output_token_count is None:
            agent.model.last_output_token_count = 0
        yield msg

Gradio_UI.stream_to_gradio = _patched_stream_to_gradio
# ────────────────────────────────────────────────────────────────────


# --- Custom Tool Example (You can edit this) ---
def my_custom_tool(arg1: str, arg2: int) -> str:
    """
    A tool that does nothing yet 
    Args:
        arg1: the first argument
        arg2: the second argument
    """
    return "What magic will you build ?"


# --- Working Timezone Tool ---
def get_current_time_in_timezone(timezone: str) -> str:
    """
    A tool that fetches the current local time in a specified timezone.
    Args:
        timezone: A string representing a valid timezone (e.g., 'America/New_York').
    """
    try:
        tz = pytz.timezone(timezone)
        local_time = datetime.datetime.now(tz).strftime("%Y-%m-%d %H:%M:%S")
        return f"The current local time in {timezone} is: {local_time}"
    except Exception as e:
        return f"Error fetching time for timezone '{timezone}': {str(e)}"


# --- Load and configure model ---
final_answer = FinalAnswerTool()
model = HfApiModel(
    model_id='Qwen/Qwen3-Coder-30B-A3B-Instruct',
    max_tokens=2096,
    temperature=0.5,
)

# initialize counters so they're never None
model.last_input_token_count = 0
model.last_output_token_count = 0


# --- Load System Prompts ---
with open("prompts.yaml", 'r') as stream:
    prompt_templates = yaml.safe_load(stream)

# --- Load External Tools ---
image_generation_tool = load_tool("agents-course/text-to-image", trust_remote_code=True)

# --- Create the Agent ---
agent = CodeAgent(
    model=model,
    tools=[
        final_answer,
        image_generation_tool,
        # DuckDuckGoSearchTool(),                # optional
        # tool(my_custom_tool),                  # if you decorate it
        # tool(get_current_time_in_timezone),    # likewise
    ],
    max_steps=6,
    verbosity_level=1,
    prompt_templates=prompt_templates
)

# --- Launch UI ---
GradioUI(agent).launch()