def _template_has_httpapi_resource_with_default_authorizer(template):
    """
    Returns true if the template contains at least one AWS::Serverless::HttpApi resource with DefaultAuthorizer configured
    """
    # Check whether DefaultAuthorizer is defined in Globals.HttpApi
    has_global_httpapi_default_authorizer = False
    if "Globals" in template and isinstance(template["Globals"], dict):
        globals_dict = template["Globals"]
        if "HttpApi" in globals_dict and isinstance(globals_dict["HttpApi"], dict):
            globals_httpapi_dict = globals_dict["HttpApi"]
            if "Auth" in globals_httpapi_dict and isinstance(globals_httpapi_dict["Auth"], dict):
                has_global_httpapi_default_authorizer = bool(globals_httpapi_dict["Auth"].get("DefaultAuthorizer"))

    # Check if there is explicit HttpApi resource
    for resource_dict in template.get("Resources", {}).values():
        if isinstance(resource_dict, dict) and resource_dict.get("Type") == "AWS::Serverless::HttpApi":
            auth = resource_dict.get("Properties", {}).get("Auth", {})
            if (
                auth and isinstance(auth, dict) and auth.get("DefaultAuthorizer")
            ) or has_global_httpapi_default_authorizer:
                return True

    # Check if there is any httpapi event for implicit api
    if has_global_httpapi_default_authorizer:
        for resource_dict in template.get("Resources", {}).values():
            if isinstance(resource_dict, dict) and resource_dict.get("Type") == "AWS::Serverless::Function":
                events = resource_dict.get("Properties", {}).get("Events", {})
                if isinstance(events, dict):
                    for event_dict in events.values():
                        if event_dict and isinstance(event_dict, dict) and event_dict.get("Type") == "HttpApi":
                            return True

    return False