"""AutoGen backend — uses microsoft/autogen for multi-agent conversation."""


def check_installed():
    try:
        import autogen  # noqa
        return True
    except ImportError:
        return False


def run(scenario_path: str, config: dict):
    if not check_installed():
        print("AutoGen is not installed. Run:\n  pip install meeting-room[autogen]")
        return []

    import yaml
    import autogen
    from meeting_room.api_client import init_providers
    from meeting_room.scenario_loader import load_scenario

    scenario = load_scenario(scenario_path)
    init_providers(config)
    roles = config["roles"]
    participants = scenario.get("participants", list(roles.keys()))

    llm_configs = {}
    for prov_name, prov_cfg in config["providers"].items():
        llm_configs[prov_name] = {
            "base_url": prov_cfg["base_url"],
            "api_key": prov_cfg["api_key"],
        }

    agents = []
    for role_id in participants:
        role = roles[role_id]
        prov = role["provider"]
        llm_cfg = dict(llm_configs[prov])
        llm_cfg["model"] = role["model"]

        agent = autogen.ConversableAgent(
            name=role["name"],
            system_message=role["system_prompt"].strip(),
            llm_config={"config_list": [llm_cfg], "temperature": role.get("temperature", 0.7)},
            human_input_mode="NEVER",
        )
        agents.append(agent)

    groupchat = autogen.GroupChat(
        agents=agents,
        messages=[],
        max_round=scenario.get("max_rounds", config["defaults"]["max_rounds"]),
    )
    manager = autogen.GroupChatManager(
        groupchat=groupchat,
        llm_config={"config_list": [llm_configs[participants[0]]]},
    )

    agents[0].initiate_chat(manager, message=scenario["problem"])
    return groupchat.messages