import type { Payload } from '../../../types/index.js';
/**
 * Convert to snake_case (matches to-snake-case library behavior)
 * Handles camelCase, PascalCase, and hyphens
 */
export declare const toSnakeCase: (str: string) => string;
export type VersionRecord = {
    _status: 'draft' | 'published';
    created_at?: Date | string;
    createdAt?: Date | string;
    id: number | string;
    parent: number | string;
    published_locale?: string;
    publishedLocale?: string;
    snapshot?: boolean;
};
export type VersionLocaleStatusMap = Map<number | string, Map<string, 'draft' | 'published'>>;
/**
 * Core logic for calculating the status of each locale for each version
 * by processing version history chronologically.
 *
 * This works by:
 * 1. Processing versions in chronological order (oldest first)
 * 2. Tracking the cumulative published state for each document as we process versions
 * 3. For each version, determining what status each locale should have based on:
 *    - Publish events with publishedLocale: mark that locale as published, version shows NEW state
 *    - Publish events without publishedLocale: mark all locales as published, version shows NEW state
 *    - Draft saves (_status='draft'): mark all locales as draft (unpublish everything)
 *    - Snapshots: preserve state AFTER publish (snapshots created after publishing specific locale)
 *
 * Snapshot creation flow when publishing one locale:
 * 1. Merge incoming content with last published → update main table
 * 2. Create snapshot object (preserves other locales' draft content + updates published locale)
 * 3. Create publish version (_status='published', publishedLocale set)
 * 4. Create snapshot version (_status='draft', snapshot=true)
 *    - Snapshot CONTENT is mixed (draft + published content)
 *    - Snapshot STATUS reflects which locales are actually published
 *
 * Example scenario:
 * - V1: publish all locales (no snapshot) → state: {en: published, es: published, de: published}
 * - V2: draft save → state: {en: draft, es: draft, de: draft}
 * - V3: publish en only → state: {en: published, es: draft, de: draft}
 * - V4: snapshot after publishing en → state: {en: published, es: draft, de: draft}
 * - V5: publish all locales (no snapshot) → state: {en: published, es: published, de: published}
 *
 * @param versions - Array of version records (must be sorted by parent, then createdAt ASC)
 * @param locales - Array of locale codes (e.g., ['en', 'es', 'pt'])
 * @param payload - Payload instance for logging
 * @returns Map of versionId -> Map of locale -> status
 */
export declare function calculateVersionLocaleStatuses(versions: VersionRecord[], locales: string[], payload: Payload): VersionLocaleStatusMap;
/**
 * Sorts version records by parent document, then by creation date (oldest first)
 *
 * @param versions - Array of version records
 * @returns Sorted array of version records
 */
export declare function sortVersionsChronologically(versions: VersionRecord[]): VersionRecord[];
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