"""客服后台菜单可见性（侧栏展示，不影响各页面原有权限校验）。"""
import logging
from types import SimpleNamespace

from backend.utils import _AllPermissions, verify_kefu_permission
from jituan.models import KefuMenuPage
from jituan.services.admin_context import (
    build_admin_club_context,
    can_access_admin_user_management,
    can_manage_admin_assignments,
    get_allowed_club_ids,
    is_system_super_admin,
)
from jituan.services.club_context import resolve_club_id_from_request, resolve_club_scope
from jituan.services.club_rbac import user_bound_role_names, describe_roles_in_scope
from jituan.services.kefu_menu_definitions import KEFU_MENU_ROW_DEFS

logger = logging.getLogger(__name__)


def _is_super_permissions(permissions):
    return isinstance(permissions, _AllPermissions)


def _has_super_perm(permissions):
    """俱乐部超级管理权限 000001（角色/后台用户等），不含集团级配置。"""
    if _is_super_permissions(permissions):
        return True
    return '000001' in permissions


def _page_visible(page, permissions, user):
    page_id = getattr(page, 'page_id', '') or ''

    if page.require_group_manage:
        return can_manage_admin_assignments(user)

    # 后台用户：本店超级管理 000001 / 集团 / 系统超管均可。
    # 注意：历史上 DB 模型缺 require_admin_user_manage 字段，导致该页永远不可见，必须按 page_id 兜底。
    if page_id == 'admin.user' or getattr(page, 'require_admin_user_manage', False):
        return can_access_admin_user_management(user, permissions)

    if page.require_super:
        return _has_super_perm(permissions) or is_system_super_admin(user)

    # 仅系统级超管可见全部菜单；俱乐部 000001 不展开业务菜单
    if is_system_super_admin(user):
        return True

    codes = page.perm_codes or []
    if not codes:
        return False
    return any(code in permissions for code in codes)


def _permission_codes_list(permissions):
    if isinstance(permissions, _AllPermissions):
        return list(dict.fromkeys(permissions)) if len(permissions) else ['000001']
    return list(permissions) if permissions else []


def _builtin_menu_pages():
    """DB 无数据时的内置菜单（与 seed_kefu_menu 定义一致）。"""
    pages = []
    for row in KEFU_MENU_ROW_DEFS:
        pages.append(SimpleNamespace(
            page_id=row['page_id'],
            name=row['name'],
            path=row.get('path', ''),
            parent_id=row.get('parent_id', ''),
            sort_order=row.get('sort_order', 0),
            perm_codes=row.get('perm_codes', []),
            require_super=row.get('require_super', False),
            require_group_manage=row.get('require_group_manage', False),
            require_admin_user_manage=row.get('require_admin_user_manage', False),
        ))
    return pages


def _load_menu_pages():
    """从 DB 加载菜单；失败或空表时尝试 seed，仍空则用内置定义。"""
    pages = []
    menu_source = 'db'
    try:
        pages = KefuMenuPage.objects.all().order_by('sort_order', 'page_id')
        pages = list(pages)
    except Exception as e:
        logger.warning('KefuMenuPage.objects 读取失败: %s', e)
        pages = []

    if not pages:
        try:
            pages = KefuMenuPage.query.order_by('sort_order', 'page_id').to_list()
        except Exception as e:
            logger.warning('KefuMenuPage.query 读取失败: %s', e)
            pages = []

    need_seed = not pages or not any(
        p.page_id in ('miniapp.assets', 'product.fake-orders', 'miniapp.recharge-copy') for p in pages
    )
    if need_seed:
        try:
            from django.core.management import call_command
            call_command('seed_kefu_menu')
            pages = list(KefuMenuPage.objects.all().order_by('sort_order', 'page_id'))
        except Exception as e:
            logger.warning('seed_kefu_menu 自动执行失败: %s', e)

    if not pages:
        pages = _builtin_menu_pages()
        menu_source = 'builtin'
        logger.warning('kefu_menu_page 表无数据，使用内置菜单定义（请执行 migrate jituan + seed_kefu_menu）')

    return pages, menu_source


def build_menu_access_payload(request, username=None):
    """
    根据用户 gvsdsdk 权限计算可见菜单 page_id 列表。
    返回 (payload, error_response)；error_response 非空时表示校验失败。
    """
    phone = (username or getattr(request.user, 'Phone', '') or '').strip()
    kefu, permissions = verify_kefu_permission(request, phone)
    if kefu is None:
        return None, permissions

    pages, menu_source = _load_menu_pages()
    visible_ids = []

    for page in pages:
        if not page.path:
            continue
        if _page_visible(page, permissions, request.user):
            visible_ids.append(page.page_id)

    for page in pages:
        if page.path:
            continue
        children = [p for p in pages if p.parent_id == page.page_id and p.path]
        if any(child.page_id in visible_ids for child in children):
            visible_ids.append(page.page_id)

    from jituan.constants import DATA_SCOPE_SINGLE
    from jituan.models import AdminAssignment

    club_ctx = build_admin_club_context(request.user)
    club_id = getattr(request, 'club_id', None) or resolve_club_id_from_request(request)
    scope = getattr(request, 'club_scope', None) or resolve_club_scope(request)
    allowed = list(get_allowed_club_ids(request.user))
    perm_codes = _permission_codes_list(permissions)
    role_names = user_bound_role_names(request.user, club_id, scope, allowed)
    roles_detail = describe_roles_in_scope(request.user, club_id, scope, allowed)

    perm_hint = ''
    if scope == DATA_SCOPE_SINGLE and not perm_codes:
        has_assignment = AdminAssignment.query.filter(
            yonghuid=request.user.UserUID, status=1, club_id=club_id,
        ).exists()
        if has_assignment and not role_names:
            perm_hint = (
                f'当前俱乐部（{club_id}）已有任职但未绑定功能角色，'
                '请在「后台用户」中为该俱乐部分配角色后重新登录。'
            )
        elif not has_assignment:
            perm_hint = (
                f'当前俱乐部（{club_id}）无功能角色；'
                '请确认已在该俱乐部绑定 gvsdsdk 角色（与数据范围任职是两套配置）。'
            )

    path_by_id = {p.page_id: p.path for p in pages if p.path}
    visible_paths = [path_by_id[pid] for pid in visible_ids if pid in path_by_id]
    is_super = _has_super_perm(permissions) or is_system_super_admin(request.user)
    return {
        'visible_page_ids': sorted(set(visible_ids)),
        'visible_paths': visible_paths,
        'permission_codes': perm_codes,
        'role_names': role_names,
        'yonghuid': getattr(request.user, 'UserUID', '') or '',
        'club_id': club_id,
        'club_scope': scope,
        'effective_club_id': club_id,
        'perm_hint': perm_hint,
        'roles_in_scope': roles_detail,
        'can_switch_club': bool(club_ctx.get('can_switch_club')),
        'is_group_admin': bool(club_ctx.get('is_group_admin')),
        'is_super': bool(is_super),
        'menu_ready': True,
        'menu_source': menu_source,
    }, None