deer-flow/src/workflow.py

# Copyright (c) 2025 Bytedance Ltd. and/or its affiliates
# SPDX-License-Identifier: MIT

import logging

from src.config.configuration import get_recursion_limit
from src.graph import build_graph
from src.graph.utils import build_clarified_topic_from_history

# Configure logging
logging.basicConfig(
    level=logging.INFO,  # Default level is INFO
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
)


def enable_debug_logging():
    """Enable debug level logging for more detailed execution information."""
    # Must also set root logger level to allow DEBUG messages to propagate
    logging.getLogger("src").setLevel(logging.DEBUG)
    logging.getLogger("langchain").setLevel(logging.DEBUG)
    logging.getLogger("langgraph").setLevel(logging.DEBUG)


logger = logging.getLogger(__name__)

# Create the graph
graph = build_graph()


async def run_agent_workflow_async(
    user_input: str,
    debug: bool = False,
    max_plan_iterations: int = 1,
    max_step_num: int = 3,
    enable_background_investigation: bool = True,
    enable_clarification: bool | None = None,
    max_clarification_rounds: int | None = None,
    initial_state: dict | None = None,
    locale: str | None = None,
):
    """Run the agent workflow asynchronously with the given user input.

    Args:
        user_input: The user's query or request
        debug: If True, enables debug level logging
        max_plan_iterations: Maximum number of plan iterations
        max_step_num: Maximum number of steps in a plan
        enable_background_investigation: If True, performs web search before planning to enhance context
        enable_clarification: If None, use default from State class (False); if True/False, override
        max_clarification_rounds: Maximum number of clarification rounds allowed
        initial_state: Initial state to use (for recursive calls during clarification)
        locale: The locale setting (e.g., 'en-US', 'zh-CN')

    Returns:
        The final state after the workflow completes
    """
    if not user_input:
        raise ValueError("Input could not be empty")

    if debug:
        enable_debug_logging()

    logger.info(f"Starting async workflow with user input: {user_input}")

    # Use provided initial_state or create a new one
    if initial_state is None:
        # Runtime Variables
        initial_state = {"messages": [{"role": "user", "content": user_input}],
                         "auto_accepted_plan": True,
                         "enable_background_investigation": enable_background_investigation,
                         "research_topic": user_input,
                         "clarified_research_topic": user_input}

        # Only set clarification parameter if explicitly provided
        # If None, State class default will be used (enable_clarification=False)
        if enable_clarification is not None:
            initial_state["enable_clarification"] = enable_clarification

        if max_clarification_rounds is not None:
            initial_state["max_clarification_rounds"] = max_clarification_rounds

        if locale is not None:
            initial_state["locale"] = locale

    config = {
        "configurable": {
            "thread_id": "default",
            "max_plan_iterations": max_plan_iterations,
            "max_step_num": max_step_num,
            "mcp_settings": {
                "servers": {
                    "mcp-github-trending": {
                        "transport": "stdio",
                        "command": "uvx",
                        "args": ["mcp-github-trending"],
                        "enabled_tools": ["get_github_trending_repositories"],
                        "add_to_agents": ["researcher"],
                    }
                }
            },
        },
        "recursion_limit": get_recursion_limit(default=100),
    }
    last_message_cnt = 0
    final_state = None
    async for s in graph.astream(
        input=initial_state, config=config, stream_mode="values"
    ):
        try:
            final_state = s
            if isinstance(s, dict) and "messages" in s:
                if len(s["messages"]) <= last_message_cnt:
                    continue
                last_message_cnt = len(s["messages"])
                message = s["messages"][-1]
                if isinstance(message, tuple):
                    print(message)
                else:
                    message.pretty_print()
            else:
                print(f"Output: {s}")
        except Exception as e:
            logger.error(f"Error processing stream output: {e}")
            print(f"Error processing output: {str(e)}")

    # Check if clarification is needed using centralized logic
    if final_state and isinstance(final_state, dict):
        from src.graph.nodes import needs_clarification

        if needs_clarification(final_state):
            # Wait for user input
            print()
            clarification_rounds = final_state.get("clarification_rounds", 0)
            max_clarification_rounds = final_state.get("max_clarification_rounds", 3)
            user_response = input(
                f"Your response ({clarification_rounds}/{max_clarification_rounds}): "
            ).strip()

            if not user_response:
                logger.warning("Empty response, ending clarification")
                return final_state

            # Continue workflow with user response
            current_state = final_state.copy()
            current_state["messages"] = final_state["messages"] + [
                {"role": "user", "content": user_response}
            ]
            for key in (
                "clarification_history",
                "clarification_rounds",
                "clarified_research_topic",
                "research_topic",
                "locale",
                "enable_clarification",
                "max_clarification_rounds",
            ):
                if key in final_state:
                    current_state[key] = final_state[key]

            return await run_agent_workflow_async(
                user_input=user_response,
                max_plan_iterations=max_plan_iterations,
                max_step_num=max_step_num,
                enable_background_investigation=enable_background_investigation,
                enable_clarification=enable_clarification,
                max_clarification_rounds=max_clarification_rounds,
                initial_state=current_state,
                locale=locale,
            )

    logger.info("Async workflow completed successfully")


if __name__ == "__main__":
    print(graph.get_graph(xray=True).draw_mermaid())