"""角色/后台客服按俱乐部隔离（权限码全局共用，角色实体按 club 分开）。"""
from django.db.models import Q

from gvsdsdk.models import Role, UserRole

from jituan.constants import CLUB_ID_DEFAULT, DATA_SCOPE_ALL
from jituan.services.club_context import resolve_club_id_from_request, resolve_club_scope


def resolve_role_club_id(request, explicit=None):
    """创建/筛选角色时使用的俱乐部；集团视图可显式指定 target_club_id。"""
    if explicit:
        return (explicit or '').strip()
    scope = resolve_club_scope(request)
    if scope == DATA_SCOPE_ALL:
        return ''
    return resolve_club_id_from_request(request)


def filter_roles_for_request(request):
    """
    子公司视图：仅本俱乐部角色。
    集团汇总视图：全部角色（含各俱乐部 + 全局 club_id 为空）。
    """
    qs = Role.objects.filter(RoleStatus=1)
    scope = resolve_club_scope(request)
    if scope == DATA_SCOPE_ALL:
        return qs
    club_id = resolve_club_id_from_request(request)
    return qs.filter(ClubID=club_id)


def filter_kefu_users_qs(qs, request):
    """后台客服账号列表按俱乐部过滤（User.ClubID）。"""
    scope = resolve_club_scope(request)
    if scope == DATA_SCOPE_ALL:
        return qs
    club_id = resolve_club_id_from_request(request)
    if club_id == CLUB_ID_DEFAULT:
        return qs.filter(Q(ClubID=club_id) | Q(ClubID__isnull=True) | Q(ClubID=''))
    return qs.filter(ClubID=club_id)


def count_role_users_in_scope(role, request, kefu_user_uuids):
    """统计角色下客服数（仅计当前数据范围内的客服）。"""
    from users.business_models import User

    uuids = list(
        UserRole.objects.filter(RoleUUID=role.RoleUUID)
        .values_list('UserUUID', flat=True)
    )
    if not uuids:
        return 0
    qs = User.objects.filter(UserUUID__in=uuids, KefuProfile__isnull=False)
    qs = filter_kefu_users_qs(qs, request)
    if kefu_user_uuids is not None:
        qs = qs.filter(UserUUID__in=kefu_user_uuids)
    return qs.count()


def role_name_exists(role_name, club_id):
    return Role.objects.filter(RoleName=role_name, ClubID=club_id or '').exists()


def resolve_role_by_name(role_name, club_id=None):
    """按角色名解析 Role；优先匹配用户俱乐部，其次集团全局角色（club_id 为空）。"""
    name = (role_name or '').strip()
    if not name:
        return None
    qs = Role.objects.filter(RoleName=name, RoleStatus=1)
    cid = (club_id or '').strip()
    if cid:
        hit = qs.filter(ClubID=cid).first()
        if hit:
            return hit
    return qs.filter(ClubID='').first() or qs.first()


def role_uuid_bytes(role_uuid):
    """RoleUUID 统一转 bytes（兼容 UUIDObj / bytes / str）。"""
    from gvsdsdk.model_utils import UUIDObj
    if isinstance(role_uuid, bytes):
        return role_uuid
    return UUIDObj(role_uuid).bytes


def resolve_roles_for_binding(role_names, club_id=None):
    """
    按角色名解析并去重；任一角色在当前俱乐部下找不到则整体失败。
    返回 (roles, missing_names)。
    """
    resolved = []
    missing = []
    seen_bytes = set()
    for raw in role_names or []:
        name = (raw or '').strip()
        if not name:
            continue
        role = resolve_role_by_name(name, club_id)
        if not role:
            missing.append(name)
            continue
        key = role_uuid_bytes(role.RoleUUID)
        if key in seen_bytes:
            continue
        seen_bytes.add(key)
        resolved.append(role)
    return resolved, missing


def user_bound_role_names(user):
    from backend.utils import _legacy_backend_role_permissions

    uuids = list(
        UserRole.objects.filter(UserUUID=user.UserUUID).values_list('RoleUUID', flat=True)
    )
    names = []
    if uuids:
        names = list(
            Role.objects.filter(RoleUUID__in=uuids, RoleStatus=1).values_list('RoleName', flat=True)
        )
    _, legacy_names = _legacy_backend_role_permissions(getattr(user, 'Phone', ''))
    return sorted(set(names + legacy_names))


def resolve_kefu_admin_user(yonghuid=None, phone=None):
    """定位后台客服 User；优先 yonghuid（同手机号多账号时必须用 ID）。"""
    from users.business_models import User

    uid = (yonghuid or '').strip()
    if uid:
        user = User.objects.filter(UserUID=uid, KefuProfile__isnull=False).first()
        if user:
            return user
    ph = (phone or '').strip()
    if not ph:
        return None
    return User.objects.filter(Phone=ph, KefuProfile__isnull=False).order_by('-UserCreateTime').first()