use std::{collections::BTreeSet, time::Duration};

use crank_metrics::{
    ExemplarTraceId, HttpMethod, HttpRoute, HttpStatusClass, McpMethod, McpOutcome,
    McpResponseMode, MetricService, record_http_request, record_mcp_request,
    render_metric_schema_json,
};
use metrics_util::debugging::DebuggingRecorder;

#[test]
fn one_million_hostile_values_collapse_to_the_same_closed_series() {
    let recorder = DebuggingRecorder::new();
    let snapshotter = recorder.snapshotter();
    metrics::with_local_recorder(&recorder, || {
        for index in 0..1_000_000_u32 {
            let canary = format!("workspace-{index}-request-trace-url-secret");
            assert!(MetricService::parse(&canary).is_none());
            assert!(ExemplarTraceId::parse(&canary).is_none());
            record_http_request(
                HttpRoute::from_matched_path(&canary),
                HttpMethod::classify(&canary),
                HttpStatusClass::from_status(999),
                Duration::ZERO,
            );
            record_mcp_request(
                McpMethod::Invalid,
                McpResponseMode::Unknown,
                McpOutcome::Other,
                Duration::ZERO,
            );
        }
    });

    let series = snapshotter
        .snapshot()
        .into_vec()
        .into_iter()
        .map(|(key, _, _, _)| format!("{:?}", key.key()))
        .collect::<BTreeSet<_>>();
    assert_eq!(series.len(), 4);
    assert!(series.iter().all(|value| !value.contains("workspace-")));
    assert!(!render_metric_schema_json().unwrap().contains("workspace-"));
}