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

"""
@author: 猿小天
@contact: QQ:1638245306
@Created on: 2021/6/3 003 0:30
@Remark: 菜单按钮管理
"""
from django.db.models import F, Subquery, OuterRef, Exists, BooleanField, Q, Case, Value, When
from django.db.models.functions import Coalesce
from rest_framework import serializers
from rest_framework.decorators import action
from rest_framework.fields import ListField
from rest_framework.permissions import IsAuthenticated

from dvadmin.system.models import RoleMenuButtonPermission, Menu, MenuButton, Dept, RoleMenuPermission, FieldPermission, \
    MenuField
from dvadmin.system.views.menu import MenuSerializer
from dvadmin.utils.json_response import DetailResponse, ErrorResponse
from dvadmin.utils.serializers import CustomModelSerializer
from dvadmin.utils.viewset import CustomModelViewSet


class RoleMenuButtonPermissionSerializer(CustomModelSerializer):
    """
    菜单按钮-序列化器
    """

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


class RoleMenuButtonPermissionCreateUpdateSerializer(CustomModelSerializer):
    """
    初始化菜单按钮-序列化器
    """
    menu_button__name = serializers.CharField(source='menu_button.name', read_only=True)
    menu_button__value = serializers.CharField(source='menu_button.value', read_only=True)

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


class RoleButtonPermissionSerializer(CustomModelSerializer):
    """
    角色按钮权限
    """
    isCheck = serializers.SerializerMethodField()
    data_range = serializers.SerializerMethodField()

    def get_isCheck(self, instance):
        params = self.request.query_params
        return RoleMenuButtonPermission.objects.filter(
            menu_button__id=instance['id'],
            role__id=params.get('role'),
        ).exists()

    def get_data_range(self, instance):
        params = self.request.query_params
        obj = RoleMenuButtonPermission.objects.filter(
            menu_button__id=instance['id'],
            role__id=params.get('role'),
        ).first()
        if obj is None:
            return None
        return obj.data_range

    class Meta:
        model = MenuButton
        fields = ['id', 'name', 'value', 'isCheck', 'data_range']


class RoleFieldPermissionSerializer(CustomModelSerializer):
    class Meta:
        model = FieldPermission
        fields = "__all__"


class RoleMenuFieldSerializer(CustomModelSerializer):
    is_query = serializers.SerializerMethodField()
    is_create = serializers.SerializerMethodField()
    is_update = serializers.SerializerMethodField()

    def get_is_query(self, instance):
        params = self.request.query_params
        queryset = instance.menu_field.filter(role=params.get('role')).first()
        if queryset:
            return queryset.is_query
        return False

    def get_is_create(self, instance):
        params = self.request.query_params
        queryset = instance.menu_field.filter(role=params.get('role')).first()
        if queryset:
            return queryset.is_create
        return False

    def get_is_update(self, instance):
        params = self.request.query_params
        queryset = instance.menu_field.filter(role=params.get('role')).first()
        if queryset:
            return queryset.is_update
        return False

    class Meta:
        model = MenuField
        fields = ['id', 'field_name', 'title', 'is_query', 'is_create', 'is_update']


class RoleMenuSerializer(CustomModelSerializer):
    menus = serializers.SerializerMethodField()

    def get_menus(self, instance):
        menu_list = Menu.objects.filter(parent=instance['id']).values('id', 'name')
        serializer = RoleMenuPermissionSerializer(menu_list, many=True, request=self.request)
        return serializer.data

    class Meta:
        model = Menu
        fields = ['id', 'name', 'menus']


class RoleMenuPermissionSerializer(CustomModelSerializer):
    """
    菜单和按钮权限
    """
    # name = serializers.SerializerMethodField()
    isCheck = serializers.SerializerMethodField()
    btns = serializers.SerializerMethodField()
    columns = serializers.SerializerMethodField()

    # def get_name(self, instance):
    #     parent_list = Menu.get_all_parent(instance['id'])
    #     names = [d["name"] for d in parent_list]
    #     return "/".join(names)
    def get_isCheck(self, instance):
        params = self.request.query_params
        return RoleMenuPermission.objects.filter(
            menu__id=instance['id'],
            role__id=params.get('role'),
        ).exists()

    def get_btns(self, instance):
        btn_list = MenuButton.objects.filter(menu__id=instance['id']).values('id', 'name', 'value')
        serializer = RoleButtonPermissionSerializer(btn_list, many=True, request=self.request)
        return serializer.data

    def get_columns(self, instance):
        col_list = MenuField.objects.filter(menu=instance['id'])
        serializer = RoleMenuFieldSerializer(col_list, many=True, request=self.request)
        return serializer.data

    class Meta:
        model = Menu
        fields = ['id', 'name', 'isCheck', 'btns', 'columns']


class RoleMenuButtonPermissionViewSet(CustomModelViewSet):
    """
    菜单按钮接口
    list:查询
    create:新增
    update:修改
    retrieve:单例
    destroy:删除
    """
    queryset = RoleMenuButtonPermission.objects.all()
    serializer_class = RoleMenuButtonPermissionSerializer
    create_serializer_class = RoleMenuButtonPermissionCreateUpdateSerializer
    update_serializer_class = RoleMenuButtonPermissionCreateUpdateSerializer
    extra_filter_class = []

    # @action(methods=['GET'], detail=False, permission_classes=[IsAuthenticated])
    # def get_role_premission(self, request):
    #     """
    #     角色授权获取:
    #     :param request: role
    #     :return: menu,btns,columns
    #     """
    #     params = request.query_params
    #     is_superuser = request.user.is_superuser
    #     if is_superuser:
    #         queryset = Menu.objects.filter(status=1, is_catalog=True).values('name', 'id').all()
    #     else:
    #         role_id = request.user.role.values_list('id', flat=True)
    #         menu_list = RoleMenuPermission.objects.filter(role__in=role_id).values_list('menu__id', flat=True)
    #         queryset = Menu.objects.filter(status=1, is_catalog=True, id__in=menu_list).values('name', 'id').all()
    #     serializer = RoleMenuSerializer(queryset, many=True, request=request)
    #     data = serializer.data
    #     return DetailResponse(data=data)

    @action(methods=['GET'], detail=False, permission_classes=[IsAuthenticated])
    def get_role_permission(self, request):
        params = request.query_params
        # 需要授权的角色信息
        current_role = params.get('role', None)
        # 当前登录用户的角色
        role_list = request.user.role.values_list('id', flat=True)
        if current_role is None:
            return ErrorResponse(msg='参数错误')
        is_superuser = request.user.is_superuser
        if is_superuser:
            menu_queryset = Menu.objects.prefetch_related('menuPermission').prefetch_related(
                'menufield_set')
        else:
            role_id_list = request.user.role.values_list('id', flat=True)
            menu_list = RoleMenuPermission.objects.filter(role__in=role_id_list).values_list('menu__id', flat=True)

            # 当前角色已授权的菜单
            menu_queryset = Menu.objects.filter(id__in=menu_list).prefetch_related('menuPermission').prefetch_related(
                'menufield_set')
        result = []
        for menu_item in menu_queryset:
            isCheck = RoleMenuPermission.objects.filter(
                menu_id=menu_item.id,
                role_id=current_role
            ).exists()
            dicts = {
                'name': menu_item.name,
                'id': menu_item.id,
                'parent': menu_item.parent.id if menu_item.parent else None,
                'isCheck': isCheck,
                'btns': [],
                'columns': []
            }
            for mb_item in menu_item.menuPermission.all():
                rolemenubuttonpermission_queryset = RoleMenuButtonPermission.objects.filter(
                    menu_button_id=mb_item.id,
                    role_id=current_role
                ).first()
                dicts['btns'].append(
                    {
                        'id': mb_item.id,
                        'name': mb_item.name,
                        'value': mb_item.value,
                        'data_range': rolemenubuttonpermission_queryset.data_range
                        if rolemenubuttonpermission_queryset
                        else None,
                        'isCheck': bool(rolemenubuttonpermission_queryset),
                        'dept': rolemenubuttonpermission_queryset.dept.all().values_list('id', flat=True)
                        if rolemenubuttonpermission_queryset
                        else [],
                    }
                )
            for column_item in menu_item.menufield_set.all():
                # 需要授权角色已拥有的列权限
                fieldpermission_queryset = column_item.menu_field.filter(role_id=current_role).first()
                is_query = fieldpermission_queryset.is_query if fieldpermission_queryset else None
                is_create = fieldpermission_queryset.is_create if fieldpermission_queryset else None
                is_update = fieldpermission_queryset.is_update if fieldpermission_queryset else None
                # 当前登录用户角色可分配的列权限
                fieldpermission_queryset_disabled = column_item.menu_field.filter(role_id__in=role_list).first()
                disabled_query = fieldpermission_queryset_disabled.is_query if fieldpermission_queryset else None
                disabled_create = fieldpermission_queryset_disabled.is_create if fieldpermission_queryset else None
                disabled_update = fieldpermission_queryset_disabled.is_update if fieldpermission_queryset else None

                dicts['columns'].append({
                    'id': column_item.id,
                    'field_name': column_item.field_name,
                    'title': column_item.title,
                    'is_query': is_query,
                    'is_create': is_create,
                    'is_update': is_update,
                    'disabled_query': False if is_superuser else not disabled_query,
                    'disabled_create': False if is_superuser else not disabled_create,
                    'disabled_update': False if is_superuser else not disabled_update,
                })
            result.append(dicts)
        return DetailResponse(data=result)

    @action(methods=['PUT'], detail=True, permission_classes=[IsAuthenticated])
    def set_role_premission(self, request, pk):
        """
        对角色的菜单和按钮及按钮范围授权:
        :param request:
        :param pk: role
        :return:
        """
        body = request.data
        RoleMenuPermission.objects.filter(role=pk).delete()
        RoleMenuButtonPermission.objects.filter(role=pk).delete()
        for item in body:
            if item.get('isCheck'):
                RoleMenuPermission.objects.create(role_id=pk, menu_id=item["id"])
            for btn in item.get('btns'):
                if btn.get('isCheck'):
                    data_range = btn.get('data_range', 0) or 0
                    instance = RoleMenuButtonPermission.objects.create(role_id=pk, menu_button_id=btn.get('id'),
                                                                       data_range=data_range)
                    instance.dept.set(btn.get('dept', []))
            for col in item.get('columns'):
                FieldPermission.objects.update_or_create(role_id=pk, field_id=col.get('id'),
                                                         defaults={
                                                             'is_query': col.get('is_query'),
                                                             'is_create': col.get('is_create'),
                                                             'is_update': col.get('is_update')
                                                         })
        return DetailResponse(msg="授权成功")

    @action(methods=['GET'], detail=False, permission_classes=[IsAuthenticated])
    def role_menu_get_button(self, request):
        """
        当前用户角色和菜单获取可下拉选项的按钮:角色授权页面使用
        :param request:
        :return:
        """
        if params := request.query_params:
            if menu_id := params.get('menu', None):
                is_superuser = request.user.is_superuser
                if is_superuser:
                    queryset = MenuButton.objects.filter(menu=menu_id).values('id', 'name')
                else:
                    role_list = request.user.role.values_list('id', flat=True)
                    queryset = RoleMenuButtonPermission.objects.filter(
                        role__in=role_list, menu_button__menu=menu_id
                    ).values(btn_id=F('menu_button__id'), name=F('menu_button__name'))
                return DetailResponse(data=queryset)
        return ErrorResponse(msg="参数错误")

    @action(methods=['GET'], detail=False, permission_classes=[IsAuthenticated])
    def data_scope(self, request):
        """
        获取数据权限范围:角色授权页面使用
        :param request:
        :return:
        """
        is_superuser = request.user.is_superuser
        if is_superuser:
            data = [
                {"value": 0, "label": '仅本人数据权限'},
                {"value": 1, "label": '本部门及以下数据权限'},
                {"value": 2, "label": '本部门数据权限'},
                {"value": 3, "label": '全部数据权限'},
                {"value": 4, "label": '自定义数据权限'}
            ]
            return DetailResponse(data=data)
        else:
            params = request.query_params
            data = [{"value": 0, "label": '仅本人数据权限'}]
            role_list = request.user.role.values_list('id', flat=True)
            # 权限页面进入初始化获取所有的数据权限范围
            role_queryset = RoleMenuButtonPermission.objects.filter(
                role__in=role_list
            ).values_list('data_range', flat=True)
            # 通过按钮小齿轮获取指定按钮的权限
            if menu_button_id := params.get('menu_button', None):
                role_queryset = RoleMenuButtonPermission.objects.filter(
                    role__in=role_list, menu_button__id=menu_button_id
                ).values_list('data_range', flat=True)

            data_range_list = list(set(role_queryset))
            for item in data_range_list:
                if item == 0:
                    data = data
                elif item == 1:
                    data.extend([
                        {"value": 1, "label": '本部门及以下数据权限'},
                        {"value": 2, "label": '本部门数据权限'}
                    ])
                elif item == 2:
                    data.extend([{"value": 2, "label": '本部门数据权限'}])
                elif item == 3:
                    data.extend([{"value": 3, "label": '全部数据权限'}])
                elif item == 4:
                    data.extend([{"value": 4, "label": '自定义数据权限'}])
                else:
                    data = []
            return DetailResponse(data=data)

    @action(methods=['get'], detail=False, permission_classes=[IsAuthenticated])
    def role_to_dept_all(self, request):
        """
        当前用户角色下所能授权的部门:角色授权页面使用
        :param request:
        :return:
        """
        is_superuser = request.user.is_superuser
        params = request.query_params
        # 当前登录用户的角色
        role_list = request.user.role.values_list('id', flat=True)

        menu_button_id = params.get('menu_button')
        # 当前登录用户角色可以分配的自定义部门权限
        dept_checked_disabled = RoleMenuButtonPermission.objects.filter(
            role_id__in=role_list, menu_button_id=menu_button_id
        ).values_list('dept', flat=True)
        dept_list = Dept.objects.values('id', 'name', 'parent')

        data = []
        for dept in dept_list:
            dept["disabled"] = False if is_superuser else dept["id"] not in dept_checked_disabled
            data.append(dept)
        return DetailResponse(data=data)

    @action(methods=['get'], detail=False, permission_classes=[IsAuthenticated])
    def menu_to_button(self, request):
        """
        根据所选择菜单获取已配置的按钮/接口权限:角色授权页面使用
        :param request:
        :return:
        """
        params = request.query_params
        menu_id = params.get('menu', None)
        if menu_id is None:
            return ErrorResponse(msg="未获取到参数")
        is_superuser = request.user.is_superuser
        if is_superuser:
            queryset = RoleMenuButtonPermission.objects.filter(menu_button__menu=menu_id).values(
                'id',
                'data_range',
                'menu_button',
                'menu_button__name',
                'menu_button__value'
            )
            return DetailResponse(data=queryset)
        else:
            if params:

                role_id = params.get('role', None)
                if role_id is None:
                    return ErrorResponse(msg="未获取到参数")
                queryset = RoleMenuButtonPermission.objects.filter(role=role_id, menu_button__menu=menu_id).values(
                    'id',
                    'data_range',
                    'menu_button',
                    'menu_button__name',
                    'menu_button__value'
                )
                return DetailResponse(data=queryset)
        return ErrorResponse(msg="未获取到参数")

    @action(methods=['get'], detail=False, permission_classes=[IsAuthenticated])
    def role_to_menu(self, request):
        """
        获取角色对应的按钮权限
        :param request:
        :return:
        """
        params = request.query_params
        role_id = params.get('role', None)
        if role_id is None:
            return ErrorResponse(msg="未获取到参数")
        queryset = RoleMenuPermission.objects.filter(role_id=role_id).values_list('menu_id', flat=True).distinct()

        return DetailResponse(data=queryset)