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// Unless explicitly stated otherwise all files in this repository are licensed under the Apache-2.0 License.
// This product includes software developed at Datadog (https://www.datadoghq.com/).
// Copyright 2019-Present Datadog, Inc.
use serde::de::{Error, MapAccess, Visitor};
use serde::{Deserialize, Deserializer, Serialize};
use serde_with::skip_serializing_none;
use std::fmt::{self, Formatter};

/// Message for specifying limits to the number of values returned by a query.
/// This limit is only for scalar queries and has no effect on timeseries queries.
#[non_exhaustive]
#[skip_serializing_none]
#[derive(Clone, Debug, PartialEq, Serialize)]
pub struct FormulaLimit {
    /// The number of results to which to limit.
    #[serde(rename = "count")]
    pub count: Option<i32>,
    /// Direction of sort.
    #[serde(rename = "order")]
    pub order: Option<crate::datadogV2::model::QuerySortOrder>,
    #[serde(flatten)]
    pub additional_properties: std::collections::BTreeMap<String, serde_json::Value>,
    #[serde(skip)]
    #[serde(default)]
    pub(crate) _unparsed: bool,
}

impl FormulaLimit {
    pub fn new() -> FormulaLimit {
        FormulaLimit {
            count: None,
            order: None,
            additional_properties: std::collections::BTreeMap::new(),
            _unparsed: false,
        }
    }

    pub fn count(mut self, value: i32) -> Self {
        self.count = Some(value);
        self
    }

    pub fn order(mut self, value: crate::datadogV2::model::QuerySortOrder) -> Self {
        self.order = Some(value);
        self
    }

    pub fn additional_properties(
        mut self,
        value: std::collections::BTreeMap<String, serde_json::Value>,
    ) -> Self {
        self.additional_properties = value;
        self
    }
}

impl Default for FormulaLimit {
    fn default() -> Self {
        Self::new()
    }
}

impl<'de> Deserialize<'de> for FormulaLimit {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        struct FormulaLimitVisitor;
        impl<'a> Visitor<'a> for FormulaLimitVisitor {
            type Value = FormulaLimit;

            fn expecting(&self, f: &mut Formatter<'_>) -> fmt::Result {
                f.write_str("a mapping")
            }

            fn visit_map<M>(self, mut map: M) -> Result<Self::Value, M::Error>
            where
                M: MapAccess<'a>,
            {
                let mut count: Option<i32> = None;
                let mut order: Option<crate::datadogV2::model::QuerySortOrder> = None;
                let mut additional_properties: std::collections::BTreeMap<
                    String,
                    serde_json::Value,
                > = std::collections::BTreeMap::new();
                let mut _unparsed = false;

                while let Some((k, v)) = map.next_entry::<String, serde_json::Value>()? {
                    match k.as_str() {
                        "count" => {
                            if v.is_null() {
                                continue;
                            }
                            count = Some(serde_json::from_value(v).map_err(M::Error::custom)?);
                        }
                        "order" => {
                            if v.is_null() {
                                continue;
                            }
                            order = Some(serde_json::from_value(v).map_err(M::Error::custom)?);
                            if let Some(ref _order) = order {
                                match _order {
                                    crate::datadogV2::model::QuerySortOrder::UnparsedObject(
                                        _order,
                                    ) => {
                                        _unparsed = true;
                                    }
                                    _ => {}
                                }
                            }
                        }
                        &_ => {
                            if let Ok(value) = serde_json::from_value(v.clone()) {
                                additional_properties.insert(k, value);
                            }
                        }
                    }
                }

                let content = FormulaLimit {
                    count,
                    order,
                    additional_properties,
                    _unparsed,
                };

                Ok(content)
            }
        }

        deserializer.deserialize_any(FormulaLimitVisitor)
    }
}