import type { ValidationResult } from '@g-1/util';
import type { BaseRepository } from './base-repository.js';
export declare abstract class BaseService {
    protected repository: BaseRepository;
    constructor(repository: BaseRepository);
    /**
     * Validate required fields
     */
    protected validateRequiredFields(data: Record<string, unknown>, requiredFields: string[]): ValidationResult;
    /**
     * Validate email format
     */
    protected validateEmail(email: string): ValidationResult;
    /**
     * Validate and normalize email
     */
    protected validateAndNormalizeEmail(data: {
        email: string;
    }): ValidationResult<{
        email: string;
    }>;
    /**
     * Validate pagination parameters
     */
    protected validatePagination(params: {
        page?: number;
        limit?: number;
    }): ValidationResult;
    /**
     * Handle validation errors
     */
    protected handleValidationError(validation: ValidationResult, _context?: Record<string, unknown>): never;
    /**
     * Handle conflict errors
     */
    protected handleConflictError(message: string, _details?: Record<string, unknown>): never;
    /**
     * Ensure entity does not exist (throws conflict if it does)
     */
    protected ensureNotExists<T>(entity: T | null | undefined, message: string, details?: Record<string, unknown>): void;
    /**
     * Ensure entity exists (throws not found if it doesn't)
     */
    protected ensureExists<T>(entity: T | null | undefined, message?: string): asserts entity is T;
}
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