import { FilePreview } from '../components/AiChat.types';
import { AIChatLocale } from '../i18n';
/**
 * 文件上传验证结果
 */
export interface FileValidationResult {
    valid: boolean;
    rejectedFiles: File[];
    errors: string[];
}
export type ValidationMessageKey = 'fileCountExceeded' | 'fileTypeNotAllowed' | 'totalSizeExceeded' | 'totalSizeExceededWithExisting';
/**
 * 校验选项：传入 locale 使用内置三语文案，或传入 getValidationMessage 自定义
 */
export interface ValidateFileUploadOptions {
    locale?: AIChatLocale;
    getValidationMessage?: (key: ValidationMessageKey, params: Record<string, string | number>) => string;
}
/**
 * 验证文件上传
 * @param newFiles 新上传的文件列表
 * @param existingFiles 已存在的文件列表
 * @param config 上传配置
 * @param options 可选，locale 或 getValidationMessage 用于 i18n 错误文案
 * @returns 验证结果
 */
export declare function validateFileUpload(newFiles: File[], existingFiles: FilePreview[], config?: {
    upload_size_limit?: number;
    upload_number_limit?: number;
    upload_file_type_limit?: string[];
    upload_limit_message?: string;
}, options?: ValidateFileUploadOptions): FileValidationResult;
/**
 * 显示文件验证错误提示
 * @param result 验证结果
 */
export declare function showValidationErrors(result: FileValidationResult): void;