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//! Format of JSON output from rpc-perf. These structures can be used
//! by any consumer of the produced data to parse the files.

pub mod histogram;
pub use crate::histogram::Histogram;

use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
pub struct Connections {
    /// number of current connections (gauge)
    pub current: i64,
    /// number of total connect attempts
    pub total: u64,
    /// number of connections established
    pub opened: u64,
    /// number of connect attempts that failed
    pub error: u64,
    /// number of connect attempts that hit timeout
    pub timeout: u64,
}

#[derive(Copy, Clone, Serialize, Deserialize)]
pub struct Requests {
    pub total: u64,
    pub ok: u64,
    pub reconnect: u64,
    pub unsupported: u64,
}

#[derive(Serialize, Deserialize)]
pub struct Responses {
    /// total number of responses
    pub total: u64,
    /// number of responses that were successful
    pub ok: u64,
    /// number of responses that were unsuccessful
    pub error: u64,
    /// number of responses that were missed due to timeout
    pub timeout: u64,
    /// number of read requests with a hit response
    pub hit: u64,
    /// number of read requests with a miss response
    pub miss: u64,
}

#[derive(Serialize, Deserialize)]
pub struct ClientStats {
    pub connections: Connections,
    pub requests: Requests,
    pub responses: Responses,
    pub response_latency: Histogram,
}

#[derive(Serialize, Deserialize)]
pub struct PubsubStats {
    pub publishers: Publishers,
    pub subscribers: Subscribers,
}

#[derive(Serialize, Deserialize)]
pub struct Publishers {
    // current number of publishers
    pub current: i64,
}

#[derive(Serialize, Deserialize)]
pub struct Subscribers {
    // current number of subscribers
    pub current: i64,
}

#[derive(Serialize, Deserialize)]
pub struct JsonSnapshot {
    pub window: u64,
    pub elapsed: f64,
    #[serde(skip_serializing_if = "Option::is_none")]
    pub target_qps: Option<f64>,
    pub client: ClientStats,
    pub pubsub: PubsubStats,
}