//! Amazon EventBridge event types
//!
//! These data structures are sent by [Amazon EventBridge][0], encapsulated in
//! SNS notification messages.
//!
//! [0]: https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-what-is.html
use serde::{Deserialize, Serialize};

/// EC2 Instance State-change Notification
///
/// EventBridge event emitted when an EC2 instance changes state
#[derive(Deserialize, Serialize)]
#[serde(rename_all = "kebab-case")]
pub struct Ec2InstanceStateChange {
    pub instance_id: String,
    pub state: String,
}

/// Enumeration of EventBridge detail objects
///
/// EventBridge events sent by AWS services include a `detail` property, the
/// contents of which vary depending on the `detail-type` field.
#[derive(Deserialize, Serialize)]
#[serde(untagged)]
pub enum EventDetail {
    Ec2InstanceStateChange(Ec2InstanceStateChange),
}

/// EventBridge event
///
/// See also: [Amazon EventBridge events][0]
///
/// [0]: https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-events.html
#[derive(Deserialize, Serialize)]
#[serde(rename_all = "kebab-case")]
pub struct Event {
    pub version: String,
    pub id: String,
    pub detail_type: String,
    pub source: String,
    pub account: String,
    pub time: String,
    pub region: String,
    pub resources: Vec<String>,
    pub detail: EventDetail,
}