use indexmap::IndexMap;
use serde::{Deserialize, Serialize};

/// When request bodies or response payloads may be one of a number of different
/// schemas, a discriminator object can be used to aid in serialization,
/// deserialization, and validation. The discriminator is a specific object in a
/// schema which is used to inform the consumer of the specification of an
/// alternative schema based on the value associated with it.
///
/// When using the discriminator, inline schemas will not be considered.
#[derive(Serialize, Deserialize, Debug, Clone, Default, PartialEq)]
#[serde(rename_all = "camelCase")]
#[derive(schemars::JsonSchema)]
pub struct Discriminator {
    /// REQUIRED. The name of the property in the payload that
    /// will hold the discriminator value.
    pub property_name: String,
    /// An object to hold mappings between payload values and schema names or
    /// references.
    #[serde(default, skip_serializing_if = "IndexMap::is_empty")]
    pub mapping: IndexMap<String, String>,
    /// Inline extensions to this object.
    #[serde(flatten, deserialize_with = "crate::util::deserialize_extensions")]
    pub extensions: IndexMap<String, serde_json::Value>,
}
