/**
 * Template Sync Engine
 *
 * Main orchestrator for template synchronization.
 * Coordinates comparison, merging, conflict resolution, and manifest updates.
 */
import type { DatabaseClient } from '../db/client.js';
import { TemplateManifestManager } from './manifest.js';
import type { SyncResult, SyncOptions } from './types.js';
/**
 * Main template sync orchestrator
 */
export declare class TemplateSyncEngine {
    private db;
    private projectRoot;
    private templateRoot;
    private manifestManager;
    private backupManager;
    private readonly packageVersion;
    constructor(db: DatabaseClient, projectRoot?: string, templateRoot?: string);
    /**
     * Execute full sync operation
     *
     * @param options - Sync options
     * @returns Sync result
     */
    sync(options?: SyncOptions): Promise<SyncResult>;
    /**
     * Update manifest after sync
     *
     * @param comparisons - File comparisons
     */
    private updateManifest;
    /**
     * Update user-modified flags in database
     *
     * @param comparisons - File comparisons
     */
    private updateUserModifiedFlags;
    /**
     * Archive removed files
     *
     * @param filePaths - Relative paths to files
     * @returns Array of archived file paths
     */
    private archiveRemovedFiles;
    /**
     * Check if sync is needed
     *
     * @returns true if templates need updating
     */
    needsSync(): Promise<boolean>;
    /**
     * Get current manifest
     *
     * @returns Current manifest or null
     */
    getManifest(): Promise<Awaited<ReturnType<TemplateManifestManager['loadReconciledManifest']>>>;
    /**
     * Get template version from package
     *
     * @returns Package version string
     */
    private getPackageVersion;
    /**
     * Get template root path
     */
    getTemplateRoot(): string;
    /**
     * Get project root path
     */
    getProjectRoot(): string;
    /**
     * Show dry run results
     *
     * @param comparisons - File comparisons
     * @param verbose - Whether to show verbose output
     */
    private showDryRunResults;
    /**
     * Get sync status summary
     *
     * @returns Status summary
     */
    getStatusSummary(): Promise<{
        manifestExists: boolean;
        templateVersion: string | null;
        currentVersion: string;
        needsUpdate: boolean;
        userModifiedFiles: string[];
    }>;
}
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