# -*- coding: utf-8 -*-

"""
@author: 猿小天
@contact: QQ:1638245306
@Created on: 2021/6/1 001 22:38
@Remark: 菜单模块
"""
from rest_framework import serializers
from rest_framework.decorators import action

from dvadmin.system.models import Menu, MenuButton, Button
from dvadmin.utils.json_response import SuccessResponse
from dvadmin.utils.serializers import CustomModelSerializer
from dvadmin.utils.viewset import CustomModelViewSet


class MenuSerializer(CustomModelSerializer):
    """
    菜单表的简单序列化器
    """
    menuPermission = serializers.SerializerMethodField(read_only=True)

    def get_menuPermission(self, instance):
        queryset = MenuButton.objects.filter(menu=instance.id).order_by('-name').values_list('name', flat=True)
        if queryset:
            return queryset
        else:
            return None

    class Meta:
        model = Menu
        fields = "__all__"
        read_only_fields = ["id"]


class MenuCreateSerializer(CustomModelSerializer):
    """
    菜单表的创建序列化器
    """
    name = serializers.CharField(required=False)

    class Meta:
        model = Menu
        fields = "__all__"
        read_only_fields = ["id"]


class WebRouterSerializer(CustomModelSerializer):
    """
    前端菜单路由的简单序列化器
    """
    path = serializers.CharField(source="web_path")
    title = serializers.CharField(source="name")
    menuPermission = serializers.SerializerMethodField(read_only=True)

    def get_menuPermission(self, instance):
        # 判断是否是超级管理员
        if self.request.user.is_superuser:
            return Button.objects.values_list('value', flat=True)
        else:
            # 根据当前角色获取权限按钮id集合
            permissionIds = self.request.user.role.values_list('permission', flat=True)
            queryset = MenuButton.objects.filter(id__in=permissionIds,menu=instance.id).values_list('value', flat=True)
            if queryset:
                return queryset
            else:
                return None

    class Meta:
        model = Menu
        fields = "__all__"
        read_only_fields = ["id"]


class MenuViewSet(CustomModelViewSet):
    """
    菜单管理接口
    list:查询
    create:新增
    update:修改
    retrieve:单例
    destroy:删除
    """
    queryset = Menu.objects.all()
    serializer_class = MenuSerializer
    create_serializer_class = MenuCreateSerializer
    update_serializer_class = MenuCreateSerializer
    search_fields = ['name', 'status']
    filter_fields = ['parent','name', 'status','is_link','visible','cache','is_catalog']
    extra_filter_backends = []

    @action(methods=['GET'], detail=True, permission_classes=[])
    def web_router(self, request):
        """用于前端获取当前角色的路由"""
        user = request.user
        queryset = self.queryset.filter(status=1)
        if not user.is_superuser:
            menuIds = user.role.values_list('menu__id', flat=True)
            queryset = Menu.objects.filter(id__in=menuIds, status=1)
        serializer = WebRouterSerializer(queryset, many=True, request=request)
        data = serializer.data
        return SuccessResponse(data=data,total=len(data),msg="获取成功")