import { Readable } from 'stream';

/**
 * Represents the main client for interacting with a Swift storage service.
 * Provides methods to manage containers and objects within those containers.
 */
export declare class SwiftClient {
    private sw;
    constructor(config: SwiftClientOptions);
    /**
     * Creates a new container in the Swift storage.
     * @param containerName - The name of the container to create.
     * @param publicRead - Whether the container should be publicly readable.
     * @param meta - Optional metadata to associate with the container.
     * @param extraHeaders - Optional extra headers to include in the request.
     * @returns A promise that resolves when the container is successfully created.
     */
    createContainer(containerName: string, publicRead: boolean, meta?: Record<string, string> | null, extraHeaders?: Record<string, string> | null): Promise<void>;
    /**
     * Retrieves information about the client configuration or state.
     * @returns A promise resolving with client information.
     */
    getClientInfo(): Promise<any>;
    /**
     * Fetches metadata for a specified container.
     * @param containerName - The name of the container.
     * @returns A promise resolving with the container's metadata as a key-value object.
     */
    getContainerMeta(containerName: string): Promise<Record<string, string>>;
    /**
     * Deletes a specified container.
     * @param containerName - The name of the container to delete.
     * @returns A promise that resolves when the container is successfully deleted.
     */
    deleteContainer(containerName: string): Promise<void>;
    /**
     * Lists all containers accessible to the client.
     * @param query - Optional query parameters as a string or key-value pairs.
     * @param extraHeaders - Optional extra headers to include in the request.
     * @returns A promise resolving with an array of container data.
     */
    listAllContainers(query?: {
        [s: string]: string;
    }, extraHeaders?: {
        [s: string]: string;
    }): Promise<SwiftContainerData[]>;
    /**
     * Retrieves an interface to interact with a specific container.
     * @param containerName - The name of the container.
     * @returns A SwiftContainer instance for interacting with the container.
     */
    getContainer(containerName: string): SwiftContainer;
}

export declare type SwiftClientOptions = {
    authVersion: 1;
    authUrl: string;
    userName: string;
    password: string;
    tenant?: string;
} | ({
    authVersion: 2;
} & SwiftConnection) | ({
    authVersion: 3;
} & SwiftConnection);

declare type SwiftConnection = {
    authUrl: string;
    region?: string;
    userAgent?: string;
    apiKey?: string;
    userName?: string;
    userId?: string;
    domain?: string;
    domainId?: string;
    applicationCredentialId?: string;
    applicationCredentialName?: string;
    applicationCredentialSecret?: string;
    tenant?: string;
    tenantId?: string;
    tenantDomain?: string;
    tenantDomainId?: string;
    trustId?: string;
};

/**
 * Represents a container in the Swift storage service.
 * Provides methods for listing, managing, and interacting with objects and directories within the container.
 */
export declare interface SwiftContainer {
    /**
     * Retrieves a list of objects in the container with optional filtering and pagination.
     *
     * @param options - Configuration for filtering and pagination:
     *   - `prefix`: Filters objects by their prefix.
     *   - `delimiter`: Groups objects by the specified delimiter.
     *   - `limit`: Limits the number of returned objects.
     *   - `reverse`: Reverses the order of the results.
     *   - `marker`: Specifies the marker to start listing from.
     *   - `end_marker`: Specifies the marker to end the listing at.
     * @param additionalQueryParams - Additional query parameters for the API request.
     * @param extraHeaders - Additional headers to include in the request.
     * @returns A promise resolving to an array of `SwiftObject` instances.
     */
    listObjects(options?: {
        prefix?: string;
        delimiter?: string;
        limit?: number;
        reverse?: boolean;
        marker?: string;
        end_marker?: string;
    }, additionalQueryParams?: {
        [s: string]: string;
    }, extraHeaders?: {
        [s: string]: string;
    }): Promise<SwiftObject[]>;
    /**
     * Retrieves a list of object "folders" (subdirectories) in the container with optional filtering and pagination.
     *
     * @param options - Configuration for filtering and pagination:
     *   - `delimiter`: Groups objects by the specified delimiter.
     *   - `limit`: Limits the number of returned directories.
     *   - `reverse`: Reverses the order of the results.
     *   - `marker`: Specifies the marker to start listing from.
     *   - `end_marker`: Specifies the marker to end the listing at.
     * @param additionalQueryParams - Additional query parameters for the API request.
     * @param extraHeaders - Additional headers to include in the request.
     * @returns A promise resolving to an array of `SwiftSubDir` instances.
     */
    listObjectFolders(options?: {
        delimiter?: string;
        limit?: number;
        reverse?: boolean;
        marker?: string;
        end_marker?: string;
    }, additionalQueryParams?: Record<string, string>, extraHeaders?: Record<string, string>): Promise<SwiftSubDir[]>;
    /**
     * Iterates over all objects in the container, one at a time, in batches defined by the specified options.
     *
     * This method fetches objects in chunks, making it possible to process large datasets without high memory usage.
     *
     * @param options - Configuration for iteration:
     *   - `prefix`: Filters objects by their prefix.
     *   - `delimiter`: Groups objects by the specified delimiter.
     *   - `batchSize`: The number of objects to fetch per batch (default: 10000).
     * @param additionalQueryParams - Additional query parameters for the API request.
     * @param extraHeaders - Additional headers to include in the request.
     * @returns An async generator yielding individual `SwiftObject` instances.
     *
     * @example
     * const options = { batchSize: 1000 };
     *
     * for await (const swiftObject of container.iterateObjects(options)) {
     *   console.log(`Processing object: ${swiftObject.name}`);
     * }
     */
    iterateObjects(options?: {
        prefix?: string;
        delimiter?: string;
        batchSize: number;
    }, additionalQueryParams?: {
        [s: string]: string;
    }, extraHeaders?: {
        [s: string]: string;
    }): AsyncGenerator<SwiftObject>;
    /**
     * Iterates over all object "folders" (subdirectories) in the container, one at a time, in batches defined by the specified options.
     *
     * @param options - Configuration for iteration:
     *   - `delimiter`: Groups objects by the specified delimiter.
     *   - `batchSize`: The number of directories to fetch per batch (default: 10000).
     * @param additionalQueryParams - Additional query parameters for the API request.
     * @param extraHeaders - Additional headers to include in the request.
     * @returns An async generator yielding individual `SwiftSubDir` instances.
     */
    iterateObjectFolders(options?: {
        delimiter?: string;
        batchSize: number;
    }, additionalQueryParams?: {
        [s: string]: string;
    }, extraHeaders?: {
        [s: string]: string;
    }): AsyncGenerator<SwiftSubDir>;
    /**
     * Retrieves metadata for a specific object in the container.
     *
     * @param objectName - The name of the object.
     * @returns A promise resolving to the object's metadata as a key-value object.
     */
    getObjectMeta(objectName: string): Promise<Record<string, string>>;
    /**
     * Updates metadata for a specific object in the container.
     *
     * @param name - The name of the object.
     * @param meta - The metadata to update for the object.
     * @param extraHeaders - Additional headers to include in the request.
     * @returns A promise that resolves when the metadata update is complete.
     */
    patchObjectMeta(name: string, meta: Record<string, string> | null, extraHeaders?: Record<string, string> | null): Promise<void>;
    /**
     * Uploads a readable stream as an object to the container.
     *
     * @param objectName - The name of the object.
     * @param stream - The readable stream containing the object data.
     * @param meta - Optional metadata to associate with the object.
     * @param extraHeaders - Additional headers to include in the request.
     * @returns A promise that resolves when the upload is complete.
     */
    putObject(objectName: string, stream: Readable, meta?: Record<string, string> | null, extraHeaders?: Record<string, string> | null): Promise<void>;
    /**
     * Uploads a buffer as an object to the container.
     *
     * @param objectName - The name of the object.
     * @param buffer - The buffer containing the object data.
     * @param meta - Optional metadata to associate with the object.
     * @param extraHeaders - Additional headers to include in the request.
     * @returns A promise that resolves when the upload is complete.
     */
    putObject(objectName: string, buffer: Buffer, meta?: Record<string, string> | null, extraHeaders?: Record<string, string> | null): Promise<void>;
    /**
     * Deletes a specific object from the container.
     *
     * @param objectName - The name of the object.
     * @param when - Optional timestamp or date to schedule the deletion.
     * @returns A promise that resolves when the object is successfully deleted.
     */
    deleteObject(objectName: string, when?: Date | number): Promise<void>;
    /**
     * Downloads a specific object from the container as a readable stream.
     *
     * @param objectName - The name of the object.
     * @returns A promise resolving to a readable stream of the object data.
     */
    getObject(objectName: string): Promise<ReadableStreamDefaultReader<Uint8Array>>;
    /**
     * Downloads a specific object from the container as a buffer.
     *
     * @param objectName - The name of the object.
     * @returns A promise resolving to a buffer containing the object data.
     */
    getObjectAsBuffer(objectName: string): Promise<Buffer>;
    /**
     * Retrieves information about an object without downloading its content.
     *
     * @param objectName - The name of the object.
     * @returns A promise resolving to the object's information as a `SwiftObjectData` instance.
     */
    getObjectInfo(objectName: string): Promise<SwiftObjectData>;
}

declare type SwiftContainerData = {
    /** The number of objects in the container. */
    count: number;
    /** The total size of all objects in the container, in bytes. */
    bytes: number;
    /** The last modified date of the container. */
    last_modified: string;
    /** The name of the container. */
    name: string;
};

declare type SwiftObject = {
    name: string;
    bytes: number;
    hash: string;
    last_modified: Date;
    content_type: string;
};

declare type SwiftObjectData = {
    bytes: number;
    last_modified: Date;
    name: string;
    content_type: string;
    hash?: string;
};

declare type SwiftSubDir = {
    subdir: string;
};