"""考核官后台管理（按俱乐部隔离）。"""
import logging

from django.db import transaction
from rest_framework.permissions import IsAuthenticated
from rest_framework.response import Response
from rest_framework.views import APIView

from backend.view import verify_kefu_permission
from jituan.services.club_user import get_user_club_id
from jituan.services.shenhe_club import user_belongs_to_request_club
from rank.models import Bankuai, KaoheguanBankuai
from users.business_models import User
from users.models import UserShenheguan

logger = logging.getLogger(__name__)


def _normalize_bankuai_ids(data):
    """将板块 ID 统一为整数（bankuai_id 为 AutoField）。"""
    ids = data.get('bankuai_ids')
    if ids is None and data.get('bankuai_id') is not None:
        ids = [data.get('bankuai_id')]
    if not isinstance(ids, list):
        return []
    out = []
    for item in ids:
        try:
            bid = int(str(item).strip())
        except (TypeError, ValueError):
            continue
        if bid > 0 and bid not in out:
            out.append(bid)
    return out


class ClubKhgglAddView(APIView):
    """
    后台添加考核官（升级为考核官并关联板块）。
    POST /jituan/houtai/khggl-add
    Body: {
        "phone": "管理员手机号",
        "yonghuid": "用户ID",
        "bankuai_ids": ["bk001", "bk002"],   // 或 bankuai_id 单个
        "is_renzheng": true                  // 可选，默认 true
    }
    """
    permission_classes = [IsAuthenticated]

    def post(self, request):
        try:
            username_from_frontend = request.data.get('phone', None)
            kefu_obj, permissions = verify_kefu_permission(request, username_from_frontend)
            if kefu_obj is None:
                return permissions
            if 'kaohepeizhi' not in permissions:
                return Response({'code': 403, 'msg': '无考核管理权限'}, status=403)

            yonghuid = str(request.data.get('yonghuid', '')).strip()
            bankuai_ids = _normalize_bankuai_ids(request.data)
            is_renzheng = request.data.get('is_renzheng', True)
            if isinstance(is_renzheng, str):
                is_renzheng = is_renzheng.lower() in ('1', 'true', 'yes')

            if not yonghuid:
                return Response({'code': 1, 'msg': '请输入用户ID'}, status=400)
            if not bankuai_ids:
                return Response({'code': 1, 'msg': '请选择至少一个板块'}, status=400)

            try:
                user = User.query.get(UserUID=yonghuid)
            except User.DoesNotExist:
                return Response({'code': 1, 'msg': '用户ID不存在'}, status=404)

            if not user_belongs_to_request_club(user, request):
                return Response({'code': 403, 'msg': '该用户不属于当前俱乐部，无法添加为考核官'}, status=403)

            # 一次性查询所有板块是否存在，避免循环内 N+1 exists
            _existing_bids = set(
                Bankuai.query.filter(bankuai_id__in=bankuai_ids)
                .values_list('bankuai_id', flat=True)
            )
            for bid in bankuai_ids:
                if bid not in _existing_bids:
                    return Response({'code': 1, 'msg': f'板块不存在: {bid}'}, status=400)

            created_new = False
            with transaction.atomic():
                kg, created_new = UserShenheguan.query.get_or_create(
                    user=user,
                    defaults={
                        'zhuangtai': 1,
                        'shenhe_zhuangtai': 0,
                        'is_renzheng': bool(is_renzheng),
                        'shenhe_zongshu': 0,
                        'tongguo_zongshu': 0,
                        'yue': 0,
                        'zonge': 0,
                    },
                )
                if not created_new:
                    if kg.zhuangtai != 1:
                        kg.zhuangtai = 1
                    if is_renzheng:
                        kg.is_renzheng = True
                    kg.save()

                added_bankuai = []
                for bid in bankuai_ids:
                    rel, rel_created = KaoheguanBankuai.query.get_or_create(
                        kaoheguan_id=yonghuid,
                        bankuai_id=bid,
                    )
                    if rel_created:
                        added_bankuai.append(bid)

            msg = '考核官添加成功' if created_new else '已关联板块（该用户已是考核官）'
            return Response({
                'code': 0,
                'msg': msg,
                'data': {
                    'yonghuid': yonghuid,
                    'created': created_new,
                    'added_bankuai_ids': added_bankuai,
                    'club_id': get_user_club_id(user),
                    'is_renzheng': bool(kg.is_renzheng),
                },
            })
        except Exception as e:
            logger.exception('ClubKhgglAddView 接口错误')
            return Response({'code': 1, 'msg': f'服务器内部错误: {str(e)}'}, status=500)