from flask import Blueprint
from flask_menu import current_menu

blueprint = Blueprint(
    "custom_menu",
    __name__,
)


def init_menu():
    """Add custom items to main menu."""
    current_menu.submenu("main").register(
        "amdmodel",
        text="About AM-D-Model",
        external_url="https://am-d-model.eu",
        order=0,
    )


@blueprint.before_app_first_request
def init_menu_on_request():
    init_menu()


@blueprint.route("/debug-menu")
def debug_menu():
    """Debug endpoint to view menu structure."""
    result = []

    def inspect_menu(menu_node, level=0):
        indent = "  " * level
        for child in menu_node.children:
            item_info = {
                "name": child.name,
                "endpoint": getattr(child, "_endpoint", None),
                "url": getattr(child, "url", None),
                "text": getattr(child, "_text", None),
                "order": child.order,
                "has_children": bool(child.children),
            }
            result.append(f"{indent}{item_info}")
            if child.children:
                inspect_menu(child, level + 1)

    inspect_menu(current_menu.submenu("main"))
    return "<pre>" + "\n".join(result) + "</pre>"