import copy


def get_agent_config(config: dict, model_name: str) -> dict:
    """Return model-specific agent config with backward compatibility."""
    agents_cfg = config.get("agents")
    if isinstance(agents_cfg, dict):
        common_cfg = agents_cfg.get("common", {})
        model_cfg = agents_cfg.get(model_name, {})
        merged = copy.deepcopy(common_cfg)
        merged.update(model_cfg)
        return merged

    legacy_cfg = config.get("agent", {})
    return copy.deepcopy(legacy_cfg)


def get_training_config(config: dict) -> dict:
    """Normalize training keys across old/new config formats."""
    training_cfg = copy.deepcopy(config.get("training", {}))

    if "log_freq" not in training_cfg and "log_interval" in training_cfg:
        training_cfg["log_freq"] = training_cfg["log_interval"]
    if "save_freq" not in training_cfg and "save_interval" in training_cfg:
        training_cfg["save_freq"] = training_cfg["save_interval"]

    return training_cfg