// Generated from definition io.k8s.apimachinery.pkg.apis.meta.v1.LabelSelector

/// A label selector is a label query over a set of resources. The result of matchLabels and matchExpressions are ANDed. An empty label selector matches all objects. A null label selector matches no objects.
#[derive(Clone, Debug, Default, PartialEq)]
pub struct LabelSelector {
    /// matchExpressions is a list of label selector requirements. The requirements are ANDed.
    pub match_expressions: Option<Vec<crate::v1_9::apimachinery::pkg::apis::meta::v1::LabelSelectorRequirement>>,

    /// matchLabels is a map of {key,value} pairs. A single {key,value} in the matchLabels map is equivalent to an element of matchExpressions, whose key field is "key", the operator is "In", and the values array contains only "value". The requirements are ANDed.
    pub match_labels: Option<std::collections::BTreeMap<String, String>>,
}

impl<'de> serde::Deserialize<'de> for LabelSelector {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: serde::Deserializer<'de> {
        #[allow(non_camel_case_types)]
        enum Field {
            Key_match_expressions,
            Key_match_labels,
            Other,
        }

        impl<'de> serde::Deserialize<'de> for Field {
            fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: serde::Deserializer<'de> {
                struct Visitor;

                impl<'de> serde::de::Visitor<'de> for Visitor {
                    type Value = Field;

                    fn expecting(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                        write!(f, "field identifier")
                    }

                    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E> where E: serde::de::Error {
                        Ok(match v {
                            "matchExpressions" => Field::Key_match_expressions,
                            "matchLabels" => Field::Key_match_labels,
                            _ => Field::Other,
                        })
                    }
                }

                deserializer.deserialize_identifier(Visitor)
            }
        }

        struct Visitor;

        impl<'de> serde::de::Visitor<'de> for Visitor {
            type Value = LabelSelector;

            fn expecting(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                write!(f, "struct LabelSelector")
            }

            fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error> where A: serde::de::MapAccess<'de> {
                let mut value_match_expressions: Option<Vec<crate::v1_9::apimachinery::pkg::apis::meta::v1::LabelSelectorRequirement>> = None;
                let mut value_match_labels: Option<std::collections::BTreeMap<String, String>> = None;

                while let Some(key) = serde::de::MapAccess::next_key::<Field>(&mut map)? {
                    match key {
                        Field::Key_match_expressions => value_match_expressions = serde::de::MapAccess::next_value(&mut map)?,
                        Field::Key_match_labels => value_match_labels = serde::de::MapAccess::next_value(&mut map)?,
                        Field::Other => { let _: serde::de::IgnoredAny = serde::de::MapAccess::next_value(&mut map)?; },
                    }
                }

                Ok(LabelSelector {
                    match_expressions: value_match_expressions,
                    match_labels: value_match_labels,
                })
            }
        }

        deserializer.deserialize_struct(
            "LabelSelector",
            &[
                "matchExpressions",
                "matchLabels",
            ],
            Visitor,
        )
    }
}

impl serde::Serialize for LabelSelector {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: serde::Serializer {
        let mut state = serializer.serialize_struct(
            "LabelSelector",
            self.match_expressions.as_ref().map_or(0, |_| 1) +
            self.match_labels.as_ref().map_or(0, |_| 1),
        )?;
        if let Some(value) = &self.match_expressions {
            serde::ser::SerializeStruct::serialize_field(&mut state, "matchExpressions", value)?;
        }
        if let Some(value) = &self.match_labels {
            serde::ser::SerializeStruct::serialize_field(&mut state, "matchLabels", value)?;
        }
        serde::ser::SerializeStruct::end(state)
    }
}
