//! Event types for the discrete-event engine.

use crate::router::BucketId;
use crate::types::{InstanceId, ReqId};

#[derive(Debug)]
pub enum Event {
    /// New trace request arrives at the cluster router.
    Arrival { req_id: ReqId },
    /// Per-instance scheduler tick (continuous batching).
    BatchTick {
        bucket: BucketId,
        instance: InstanceId,
    },
    /// Periodic time-series sample of all instances.
    Sample,
    /// Stop the simulation early (used internally).
    Stop,
}