/**
 * Backup Manager
 *
 * Manages backups of generated context files before overwriting.
 * Supports both file-copy and git-stash based backup strategies.
 */
import type { DatabaseClient } from '../../db/client.js';
/**
 * Backup result
 */
export interface BackupResult {
    /** Whether backup was successful */
    success: boolean;
    /** Path to backup file */
    backupPath?: string;
    /** Backup method used */
    method: 'file-copy' | 'git-stash' | 'none';
    /** Error message if failed */
    error?: string;
}
/**
 * Backup manager options
 */
export interface BackupManagerOptions {
    /** Base directory for backups (default: .k0ntext/backups) */
    backupDir?: string;
    /** Use git stash if available (default: true) */
    useGitStash?: boolean;
}
/**
 * Backup manager
 *
 * Creates and manages backups of generated files.
 */
export declare class BackupManager {
    private db;
    private projectRoot;
    private backupDir;
    private useGitStash;
    constructor(db: DatabaseClient, projectRoot: string, options?: BackupManagerOptions);
    /**
     * Create a backup of a file before overwriting
     *
     * @param filePath - Path to file to backup (can be relative or absolute)
     * @param tool - Tool name for organization
     * @returns Backup result
     */
    createBackup(filePath: string, tool: string): Promise<BackupResult>;
    /**
     * Restore a file from backup
     *
     * @param backupPath - Path to backup file
     * @param targetPath - Path to restore to (can be relative or absolute)
     * @returns True if restore was successful
     */
    restoreFromBackup(backupPath: string, targetPath: string): Promise<boolean>;
    /**
     * List all backups for a tool
     *
     * @param tool - Tool name
     * @returns Array of backup paths
     */
    listBackups(tool: string): Promise<string[]>;
    /**
     * Backup using file copy strategy
     *
     * @param fullPath - Full path to file
     * @param tool - Tool name
     * @returns Backup result
     */
    private backupWithFileCopy;
    /**
     * Backup using git stash strategy
     *
     * @param fullPath - Full path to file
     * @param tool - Tool name
     * @returns Backup result
     */
    private backupWithGitStash;
    /**
     * Check if current directory is a git repository
     *
     * @returns True if git repository
     */
    private isGitRepository;
    /**
     * Clean up old backups
     *
     * @param tool - Tool name (optional, if not provided cleans all)
     * @param keepLast - Number of recent backups to keep (default: 5)
     */
    cleanupOldBackups(tool?: string, keepLast?: number): Promise<void>;
}
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