import hashlib

from django.contrib.auth.hashers import make_password
from django_restql.fields import DynamicSerializerMethodField
from rest_framework import serializers
from rest_framework.decorators import action
from rest_framework.permissions import IsAuthenticated

from application import dispatch
from dvadmin.system.models import Users, Role, Dept
from dvadmin.system.views.role import RoleSerializer
from dvadmin.utils.json_response import ErrorResponse, DetailResponse
from dvadmin.utils.serializers import CustomModelSerializer
from dvadmin.utils.validator import CustomUniqueValidator
from dvadmin.utils.viewset import CustomModelViewSet


class UserSerializer(CustomModelSerializer):
    """
    用户管理-序列化器
    """
    dept_name = serializers.CharField(source='dept.name', read_only=True)
    role_info = DynamicSerializerMethodField()

    class Meta:
        model = Users
        read_only_fields = ["id"]
        exclude = ["password"]
        extra_kwargs = {
            "post": {"required": False},
        }

    def get_role_info(self, instance, parsed_query):
        roles = instance.role.all()
        # You can do what ever you want in here
        # `parsed_query` param is passed to BookSerializer to allow further querying
        serializer = RoleSerializer(
            roles,
            many=True,
            parsed_query=parsed_query
        )
        return serializer.data


class UsersInitSerializer(CustomModelSerializer):
    """
    初始化获取数信息(用于生成初始化json文件)
    """

    class Meta:
        model = Users
        fields = ["username", "email", 'mobile', 'avatar', "name", 'gender', 'user_type', "dept", 'user_type',
                  'first_name', 'last_name', 'email', 'is_staff', 'is_active', 'creator', 'dept_belong_id',
                  'password', 'last_login', 'is_superuser']
        read_only_fields = ['id']
        extra_kwargs = {
            'creator': {'write_only': True},
            'dept_belong_id': {'write_only': True}
        }


class UserCreateSerializer(CustomModelSerializer):
    """
    用户新增-序列化器
    """

    username = serializers.CharField(
        max_length=50,
        validators=[
            CustomUniqueValidator(queryset=Users.objects.all(), message="账号必须唯一")
        ],
    )
    password = serializers.CharField(
        required=False,
    )

    def validate_password(self, value):
        """
        对密码进行验证
        """
        password = self.initial_data.get("password")
        if password:
            return make_password(value)
        return value

    def save(self, **kwargs):
        data = super().save(**kwargs)
        data.dept_belong_id = data.dept_id
        data.save()
        data.post.set(self.initial_data.get("post", []))
        return data

    class Meta:
        model = Users
        fields = "__all__"
        read_only_fields = ["id"]
        extra_kwargs = {
            "post": {"required": False},
        }


class UserUpdateSerializer(CustomModelSerializer):
    """
    用户修改-序列化器
    """

    username = serializers.CharField(
        max_length=50,
        validators=[
            CustomUniqueValidator(queryset=Users.objects.all(), message="账号必须唯一")
        ],
    )
    # password = serializers.CharField(required=False, allow_blank=True)
    mobile = serializers.CharField(
        max_length=50,
        validators=[
            CustomUniqueValidator(queryset=Users.objects.all(), message="手机号必须唯一")
        ],
        allow_blank=True
    )

    def save(self, **kwargs):
        data = super().save(**kwargs)
        data.dept_belong_id = data.dept_id
        data.save()
        data.post.set(self.initial_data.get("post", []))
        return data

    class Meta:
        model = Users
        read_only_fields = ["id", "password"]
        fields = "__all__"
        extra_kwargs = {
            "post": {"required": False, "read_only": True},
        }


class ExportUserProfileSerializer(CustomModelSerializer):
    """
    用户导出 序列化器
    """

    last_login = serializers.DateTimeField(
        format="%Y-%m-%d %H:%M:%S", required=False, read_only=True
    )
    is_active = serializers.SerializerMethodField(read_only=True)
    dept_name = serializers.CharField(source="dept.name", default="")
    dept_owner = serializers.CharField(source="dept.owner", default="")
    gender = serializers.CharField(source="get_gender_display", read_only=True)

    def get_is_active(self, instance):
        return "启用" if instance.is_active else "停用"

    class Meta:
        model = Users
        fields = (
            "username",
            "name",
            "email",
            "mobile",
            "gender",
            "is_active",
            "last_login",
            "dept_name",
            "dept_owner",
        )


class UserProfileImportSerializer(CustomModelSerializer):
    def save(self, **kwargs):
        data = super().save(**kwargs)
        password = hashlib.new(
            "md5", str(self.initial_data.get("password", "")).encode(encoding="UTF-8")
        ).hexdigest()
        data.set_password(password)
        data.save()
        return data

    class Meta:
        model = Users
        exclude = (
            "password",
            "post",
            "user_permissions",
            "groups",
            "is_superuser",
            "date_joined",
        )


class UserViewSet(CustomModelViewSet):
    """
    用户接口
    list:查询
    create:新增
    update:修改
    retrieve:单例
    destroy:删除
    """

    queryset = Users.objects.exclude(is_superuser=1).all()
    serializer_class = UserSerializer
    create_serializer_class = UserCreateSerializer
    update_serializer_class = UserUpdateSerializer
    # filter_fields = ["name", "username", "gender", "is_active", "dept", "user_type"]
    filter_fields = {
        "name": ["icontains"],
        "username": ["exact"],
        "gender": ["icontains"],
        "is_active": ["icontains"],
        "dept": ["exact"],
        "user_type": ["exact"],
    }
    search_fields = ["username", "name", "gender", "dept__name", "role__name"]
    # 导出
    export_field_label = [
        "用户账号",
        "用户名称",
        "用户邮箱",
        "手机号码",
        "用户性别",
        "帐号状态",
        "最后登录时间",
        "部门名称",
        "部门负责人",
    ]
    export_serializer_class = ExportUserProfileSerializer
    # 导入
    import_serializer_class = UserProfileImportSerializer
    import_field_dict = {
        "username": "登录账号",
        "name": "用户名称",
        "email": "用户邮箱",
        "mobile": "手机号码",
        "gender": {
            "title": "用户性别",
            "choices": {
                "data": {"未知": 2, "男": 1, "女": 0},
            }
        },
        "is_active": {
            "title": "帐号状态",
            "choices": {
                "data": {"启用": True, "禁用": False},
            }
        },
        "password": "登录密码",
        "dept": {"title": "部门", "choices": {"queryset": Dept.objects.filter(status=True), "values_name": "name"}},
        "role": {"title": "角色", "choices": {"queryset": Role.objects.filter(status=True), "values_name": "name"}},
    }

    @action(methods=["GET"], detail=False, permission_classes=[IsAuthenticated])
    def user_info(self, request):
        """获取当前用户信息"""
        user = request.user
        result = {
            "name": user.name,
            "mobile": user.mobile,
            "gender": user.gender,
            "email": user.email,
            "avatar": user.avatar,
        }
        return DetailResponse(data=result, msg="获取成功")

    @action(methods=["PUT"], detail=False, permission_classes=[IsAuthenticated])
    def update_user_info(self, request):
        """修改当前用户信息"""
        user = request.user
        Users.objects.filter(id=user.id).update(**request.data)
        return DetailResponse(data=None, msg="修改成功")

    @action(methods=["PUT"], detail=True, permission_classes=[IsAuthenticated])
    def change_password(self, request, *args, **kwargs):
        """密码修改"""
        instance = Users.objects.filter(id=kwargs.get("pk")).first()
        data = request.data
        old_pwd = data.get("oldPassword")
        new_pwd = data.get("newPassword")
        new_pwd2 = data.get("newPassword2")
        if instance:
            if new_pwd != new_pwd2:
                return ErrorResponse(msg="两次密码不匹配")
            elif instance.check_password(old_pwd):
                instance.password = make_password(new_pwd)
                instance.save()
                return DetailResponse(data=None, msg="修改成功")
            else:
                return ErrorResponse(msg="旧密码不正确")
        else:
            return ErrorResponse(msg="未获取到用户")

    @action(methods=["PUT"], detail=True, permission_classes=[IsAuthenticated])
    def reset_to_default_password(self, request, *args, **kwargs):
        """恢复默认密码"""
        instance = Users.objects.filter(id=kwargs.get("pk")).first()
        if instance:
            instance.set_password(dispatch.get_system_config_values("base.default_password"))
            instance.save()
            return DetailResponse(data=None, msg="密码重置成功")
        else:
            return ErrorResponse(msg="未获取到用户")

    @action(methods=["PUT"], detail=True)
    def reset_password(self, request, pk):
        """
        密码重置
        """
        instance = Users.objects.filter(id=pk).first()
        data = request.data
        new_pwd = data.get("newPassword")
        new_pwd2 = data.get("newPassword2")
        if instance:
            if new_pwd != new_pwd2:
                return ErrorResponse(msg="两次密码不匹配")
            else:
                instance.password = make_password(new_pwd)
                instance.save()
                return DetailResponse(data=None, msg="修改成功")
        else:
            return ErrorResponse(msg="未获取到用户")