import { type Readable } from 'node:stream';
import type { MultipartFile } from './multipart/file.ts';
/**
 * Configuration options for parsing query strings using the qs module
 */
type QueryStringConfig = {
    /** Maximum depth for nested objects */
    depth?: number;
    /** Whether to allow prototype properties */
    allowPrototypes?: boolean;
    /** Whether to create plain objects */
    plainObjects?: boolean;
    /** Maximum number of parameters to parse */
    parameterLimit?: number;
    /** Maximum number of array elements to parse */
    arrayLimit?: number;
    /** Whether to ignore the leading ? in query strings */
    ignoreQueryPrefix?: boolean;
    /** Delimiter to use for parsing */
    delimiter?: RegExp | string;
    /** Whether to allow dots in object keys */
    allowDots?: boolean;
    /** Character encoding to use */
    charset?: 'utf-8' | 'iso-8859-1' | undefined;
    /** Whether to use charset sentinel */
    charsetSentinel?: boolean;
    /** Whether to interpret numeric entities */
    interpretNumericEntities?: boolean;
    /** Whether to parse arrays */
    parseArrays?: boolean;
    /** Whether to parse comma-separated values as arrays */
    comma?: boolean;
};
/**
 * Base configuration options shared by all body parser types
 */
type BodyParserBaseConfig = {
    /** Character encoding for parsing the body */
    encoding: string;
    /** Maximum size (in bytes) limit for the request body */
    limit: string | number;
    /** Array of supported MIME types */
    types: string[];
};
/**
 * Configuration options for parsing JSON request bodies
 */
export type BodyParserJSONConfig = BodyParserBaseConfig & {
    /** Whether to only accept arrays and objects as valid JSON */
    strict: boolean;
    /** Whether to convert empty strings to null values */
    convertEmptyStringsToNull: boolean;
    trimWhitespaces: boolean;
};
/**
 * Configuration options for parsing URL-encoded form data
 */
export type BodyParserFormConfig = BodyParserBaseConfig & {
    /** Query string parsing configuration */
    queryString: QueryStringConfig;
    /** Whether to convert empty strings to null values */
    convertEmptyStringsToNull: boolean;
    trimWhitespaces: boolean;
};
/**
 * Configuration options for parsing raw request bodies (untouched)
 */
export type BodyParserRawConfig = BodyParserBaseConfig;
/**
 * Configuration options for parsing multipart form data requests
 */
export type BodyParserMultipartConfig = {
    /** Array of supported MIME types */
    types: string[];
    /** Maximum size (in bytes) limit for the request body */
    limit: string | number;
    /** Whether to auto-process files or array of route patterns to auto-process */
    autoProcess: boolean | string[];
    /** Maximum number of form fields allowed */
    maxFields: number;
    /** Array of route patterns to process manually */
    processManually: string[];
    /** Whether to convert empty strings to null values */
    convertEmptyStringsToNull: boolean;
    trimWhitespaces: boolean;
    /** Maximum size (in bytes) for all form fields combined */
    fieldsLimit?: number | string;
    /** Function to generate temporary file names */
    tmpFileName?(): string;
};
/**
 * Complete body parser configuration for all supported content types
 */
export type BodyParserConfig = {
    /** HTTP methods that should have their bodies parsed */
    allowedMethods: string[];
    /** Configuration for JSON body parsing */
    json: BodyParserJSONConfig;
    /** Configuration for form data body parsing */
    form: BodyParserFormConfig;
    /** Configuration for raw body parsing */
    raw: BodyParserRawConfig;
    /** Configuration for multipart body parsing */
    multipart: BodyParserMultipartConfig;
};
/**
 * Optional body parser configuration with all properties being optional
 */
export type BodyParserOptionalConfig = {
    /** HTTP methods that should have their bodies parsed */
    allowedMethods?: string[];
    /** Partial configuration for JSON body parsing */
    json?: Partial<BodyParserJSONConfig>;
    /** Partial configuration for form data body parsing */
    form?: Partial<BodyParserFormConfig>;
    /** Partial configuration for raw body parsing */
    raw?: Partial<BodyParserRawConfig>;
    /** Partial configuration for multipart body parsing */
    multipart?: Partial<BodyParserMultipartConfig>;
};
/**
 * ------------------------------------
 * Multipart related options
 * ------------------------------------
 */
/**
 * Readable stream along with some extra data. This is what
 * is passed to `onFile` handlers.
 */
export type MultipartStream = Readable & {
    /** Headers associated with the multipart stream */
    headers: {
        [key: string]: string;
    };
    /** The form field name */
    name: string;
    /** The original filename from the client */
    filename: string;
    /** The number of bytes in the stream */
    bytes: number;
    /** The MultipartFile instance associated with this stream */
    file: MultipartFile;
};
/**
 * The callback handler function for processing a multipart file part
 */
export type PartHandler = (
/** The multipart stream to process */
part: MultipartStream, 
/** Function to report each chunk of data */
reportChunk: (chunk: Buffer) => void) => Promise<({
    filePath?: string;
    tmpPath?: string;
} & {
    [key: string]: any;
}) | void>;
/**
 * ------------------------------------
 * Multipart file related options
 * ------------------------------------
 */
/**
 * Options that can be used to validate an uploaded file
 */
export type FileValidationOptions = {
    /** Maximum allowed file size (as string with unit or number in bytes) */
    size: string | number;
    /** Array of allowed file extensions */
    extnames: string[];
};
/**
 * Structure representing a file upload error
 */
export type FileUploadError = {
    /** The form field name where the error occurred */
    fieldName: string;
    /** The original filename from the client */
    clientName: string;
    /** Error message describing what went wrong */
    message: string;
    /** Type of error that occurred */
    type: 'size' | 'extname' | 'fatal';
};
/**
 * JSON representation of a MultipartFile instance
 */
export type FileJSON = {
    /** The form field name */
    fieldName: string;
    /** The original filename from the client */
    clientName: string;
    /** Size of the file in bytes */
    size: number;
    /** Full path where the file was moved (if moved) */
    filePath?: string;
    /** Relative filename after moving (if moved) */
    fileName?: string;
    /** MIME type of the file */
    type?: string;
    /** File extension */
    extname?: string;
    /** MIME subtype */
    subtype?: string;
    /** Current state of the file processing */
    state: 'idle' | 'streaming' | 'consumed' | 'moved';
    /** Whether the file passed all validations */
    isValid: boolean;
    /** Whether validations have been run */
    validated: boolean;
    /** Array of validation errors, if any */
    errors: FileUploadError[];
    /** Additional metadata associated with the file */
    meta: any;
};
export { MultipartFile };