import type { Applog, ApplogValue, DatalogQueryPattern, DatalogQueryResultEntry, ResultContext, SearchContext, ValueOrMatcher } from './datom-types.ts';
export declare const isoDateStrCompare: (strA: string, strB: string, dir?: "asc" | "desc") => number;
export declare const objEqualByKeys: (keys: string[], objA: object, objB: object) => boolean;
/**
 * Deep equality for an `ApplogValue`. `vl` can now hold JSON objects/arrays, so a bare
 * `===` would treat structurally-identical objects as different. `isEqual` short-circuits
 * on referential identity internally, so primitives stay on the cheap path.
 */
export declare const valueEq: (a: ApplogValue, b: ApplogValue) => boolean;
/** Canonical, hashable Map key for an `ApplogValue` (see {@link valueKey}). */
export type ValueKey = string | number | boolean | null;
/**
 * Canonical key for using an `ApplogValue` as a Map key. Primitives pass through unchanged
 * (so primitive-keyed lookups are identity-stable); objects/arrays are stably stringified
 * (key-sorted) behind a `\0obj:` sentinel so an object value can't collide with a string
 * value that happens to equal its serialization.
 */
export declare const valueKey: (vl: ApplogValue) => ValueKey;
/** Transitive total-order comparator over (ts, cid). Safe for `Array.sort`. */
export declare const compareApplogsByTs: (logA: Applog, logB: Applog, dir?: "asc" | "desc") => number;
export declare const compareApplogsByEnAt: (objA: object, objB: object) => boolean;
/**
 * Pairwise: is `a` strictly later than `b` per (ts, pv-chain, cid)?
 *
 * NOT TRANSITIVE. Use only for two-log decisions (e.g. lastWriteWins replacement
 * check). Do NOT pass to `Array.sort` — it can produce cycles at 3+ chain links
 * and break the engine's sort.
 */
export declare function isLaterByTsAndPv(a: Applog, b: Applog): boolean;
/**
 * Sort applogs in chain-aware order (modifies array, also returns for chaining).
 *
 * Two-phase:
 * 1. Transitive `(ts, cid)` `Array.sort` — fast, total-order, common case.
 * 2. For each contiguous same-ts cluster (rare), chain-stabilize via `pv`
 *    so chain-tail logs land last (asc) / first (desc) within their (en, at)
 *    sub-group. Cross-group order within a cluster stays cid-lex.
 *
 * No-tie inputs pay only one linear scan past `Array.sort`.
 */
export declare function sortApplogsByTs(appLogArray: Applog[], dir?: 'asc' | 'desc'): Applog[];
export declare const isTsBefore: (log: Applog, logToCompare: Applog) => boolean;
export declare const uniqueEnFromAppLogs: (appLogArray: Applog[]) => string[];
export declare const areApplogsEqual: (logA: Applog, logB: Applog) => boolean;
export type RemoveDuplicateAppLogsMode = 'safety' | 'cleanup';
/**
 * Deduplicate applogs by CID.
 * - safety: fast duplicate check; returns original array if no duplicates found.
 * - cleanup: optimized for merged arrays with likely duplicates.
 */
export declare const removeDuplicateAppLogs: (appLogArray: Applog[], mode?: RemoveDuplicateAppLogsMode) => Applog[];
export declare const getHashID: (stringifiable: any, lngth?: number) => string;
export declare function isVariable(x: any): x is string;
export declare function variableNameWithoutQuestionmark(str: string): string;
export declare function isStaticPattern(x: any): x is ApplogValue;
export declare function resolveOrRemoveVariables(pattern: DatalogQueryPattern, candidate: SearchContext): readonly [Partial<import("./datom-types.ts").WithMatchers<Applog>>, Partial<{
    cid: string;
    pv: string;
    ts: import("./datom-types.ts").Timestamp;
    ag: string;
    en: import("./datom-types.ts").EntityID;
    at: import("./datom-types.ts").Attribute;
    vl: string;
}>];
export declare function matchPartStatic(field: keyof Applog, patternPart: ValueOrMatcher<ApplogValue>, atomPart: ApplogValue): boolean;
export declare function matchPart(patternPart: ValueOrMatcher<ApplogValue>, atomPart: ApplogValue, context: SearchContext): ResultContext;
/**
 * Check if pattern matches triple with context substitutions
 */
export declare function matchPattern(pattern: DatalogQueryPattern, applog: Applog, context: SearchContext): ResultContext;
export declare function actualize<SELECT extends string>(context: ResultContext, find: readonly SELECT[]): DatalogQueryResultEntry<SELECT>;
export declare const arrStats: {
    max: (array: number[]) => number;
    min: (array: number[]) => number;
    range: (array: number[]) => number;
    midrange: (array: number[]) => number;
    sum: (array: number[]) => number;
    mean: (array: number[]) => number;
    average: (array: number[]) => number;
    median: (array: number[]) => number;
    modes: (array: number[]) => any[];
    variance: (array: number[]) => number;
    standardDeviation: (array: number[]) => number;
    meanAbsoluteDeviation: (array: number[]) => number;
    zScores: (array: number[]) => number[];
};
export declare const tsNearlySame: (timeA: string, timeB: string) => boolean;
export declare const cyrb53hash: (str: string, seed: number, strLength: number) => string;
export declare function arraysContainSameElements(arr1: any, arr2: any): boolean;
export declare function dateNowIso(): string;
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