/**************************************************
 * Metrics type definitions for Veryfront
 * @module
 **************************************************/
import type { Counter, Histogram, Meter } from "../tracing/api-shim.js";
export type RSCRequestKind = "manifest" | "page" | "stream" | "action" | "error" | "flight_page";
export interface ObservabilityMetrics {
    recordRender: (durationMs: number) => void;
    recordCacheGet: (hit: boolean) => void;
    recordCacheSet: () => void;
    recordCacheInvalidate: (count: number) => void;
    recordHttpRequest: () => void;
    recordRSCRequest: (type: Exclude<RSCRequestKind, "error" | "flight_page">, attributes?: Record<string, string>) => void;
    recordRSCStream: (durationMs: number) => void;
}
export interface VeryfrontMetrics {
    requests: number;
    jitHttpResolved: number;
    jitHttpBlocked: number;
    jitHttpFetchMsTotal: number;
    rscManifest: number;
    rscPage: number;
    rscStream: number;
    rscAction: number;
    rscErrors: number;
    rscStreamHistogram?: {
        boundaries: number[];
        counts: number[];
    };
    cacheGets: number;
    cacheHits: number;
    cacheMisses: number;
    cacheSets: number;
    cacheInvalidations: number;
    moduleServeTotal: number;
    moduleServeOk: number;
    moduleServeNotFound: number;
    moduleServeError: number;
    moduleTransformTotal: number;
    moduleTransformDurationMsTotal: number;
    routeManifestLruHits: number;
    routeManifestLruMisses: number;
    ssrHistogram?: {
        boundaries: number[];
        counts: number[];
    };
    corsRejections: number;
    /** SSR answered 404 because a project's published source could not be read. */
    ssrSourceUnavailable: number;
    securityHeadersApplied: number;
    apiRequests2xx: number;
    apiRequests4xx: number;
    apiRequests5xx: number;
    apiRetries: number;
    contentRequestScopedHits: number;
    contentPersistentCacheHits: number;
    contentFileListHits: number;
    contentNetworkFetches: number;
    contentNetworkFetchMsTotal: number;
    contentPreviewRequests: number;
    contentProductionRequests: number;
    contentNetworkHistogram?: {
        boundaries: number[];
        counts: number[];
    };
}
export interface MetricsState extends VeryfrontMetrics {
    _ssrCounts: number[];
    _contentNetworkCounts: number[];
}
export interface OtelInstruments {
    meter?: Meter;
    ssrHistogram?: Histogram;
    requestCounter?: Counter;
    jitResolvedCounter?: Counter;
    jitBlockedCounter?: Counter;
    cacheGetCounter?: Counter;
    cacheHitCounter?: Counter;
    cacheMissCounter?: Counter;
    cacheSetCounter?: Counter;
    cacheInvalidateCounter?: Counter;
    moduleServeCounter?: Counter;
    moduleTransformCounter?: Counter;
    moduleTransformDurationHistogram?: Histogram;
    routeManifestLookupCounter?: Counter;
}
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