import * as i0 from '@angular/core';
import { InjectionToken, OnInit, EventEmitter, ModuleWithProviders, Provider, OnDestroy } from '@angular/core';
import { Observable } from 'rxjs';

/**
 * Allows canceling some operation by calling cancel().
 * onCancel callback can be used to execute cleanup logic when cancel is called.
 */
declare class Canceler {
    /**
     * Callback function to execute cleanup logic when cancel() is called
     */
    onCancel: () => void;
    /**
     * Cancels the operation.
     */
    cancel(): void;
}

declare enum ErrorType {
    NotFound = 0,
    Auth = 1,
    Retryable = 2,
    Fatal = 3
}
type ShouldRetryFunction = (code: number, attempts: number) => boolean;
type KeepPartialFunction = (code: number) => boolean;
interface RetryConfig {
    /** Maximum number of retry attempts */
    maxAttempts?: number;
    /** Upload not exist status codes */
    shouldRestartCodes?: number[];
    /** Bad token? status codes */
    authErrorCodes?: number[];
    /** Retryable 4xx status codes */
    shouldRetryCodes?: number[];
    /** Overrides the built-in function that determines whether the operation should be repeated */
    shouldRetry?: ShouldRetryFunction;
    /** The minimum retry delay */
    minDelay?: number;
    /** The maximum retry delay */
    maxDelay?: number;
    /** Delay used between retries for non-error responses with missing range/offset */
    onBusyDelay?: number;
    /** Time interval after which hanged requests must be retried */
    timeout?: number;
    /** Determines whether partial chunks should be kept */
    keepPartial?: boolean | KeepPartialFunction;
}
/**
 * Retryable ErrorHandler
 */
declare class RetryHandler {
    attempts: number;
    config: Required<RetryConfig>;
    private observedValue?;
    cancel: () => void;
    constructor(configOptions?: RetryConfig);
    /**
     * Determine error type based on response code
     * @param code - HTTP response status code
     */
    kind(code: number): ErrorType;
    /**
     * Wait before next retry attempt
     * @param time - Delay in ms
     */
    wait(time?: number): Promise<void>;
    /**
     * Observes value to reset retry attempts counter
     * @param value - Value to observe
     */
    observe(value?: string | number): void;
}

type ResponseBody = any;
type RequestHeaders = Record<string, boolean | number | string>;
type Metadata = Record<string, unknown>;
interface RequestConfig {
    body?: BodyInit | null;
    canceler: Canceler;
    signal?: AbortSignal;
    headers: RequestHeaders;
    method: 'GET' | 'POST' | 'PUT' | 'DELETE' | 'PATCH' | 'HEAD' | 'OPTIONS';
    onUploadProgress?: (evt: ProgressEvent) => void;
    responseType?: 'arraybuffer' | 'blob' | 'document' | 'json' | 'text';
    url: string;
    validateStatus?: (status: number) => boolean;
    withCredentials?: boolean;
}
type RequestOptions = Partial<RequestConfig> & {
    skipAuthorization?: boolean;
};
type AuthorizeRequest = (req: RequestConfig, token?: string) => RequestConfig | Promise<RequestConfig>;
type PreRequest = (req: RequestConfig) => Promise<RequestOptions> | RequestOptions | void;
type UploadStatus = 'added' | 'queue' | 'uploading' | 'complete' | 'error' | 'cancelled' | 'paused' | 'retry' | 'updated';
type UploadAction = 'upload' | 'cancel' | 'pause' | 'update';
interface UploadState {
    /** Uploaded file */
    readonly file: File;
    /** Original file name */
    readonly name: string;
    /** Progress percentage */
    readonly progress: number;
    /** Estimated remaining time */
    readonly remaining: number;
    /** HTTP response body */
    readonly response: ResponseBody;
    /** HTTP response status code */
    readonly responseStatus: number;
    /** HTTP response headers */
    readonly responseHeaders: Record<string, string>;
    /** File size in bytes */
    readonly size: number;
    /** Upload speed bytes/sec */
    readonly speed: number;
    /** Upload status */
    readonly status: UploadStatus;
    /** Unique upload id */
    readonly uploadId: string;
    /** File url */
    readonly url: string;
}
interface UploadItem {
    /**
     * URL to create new uploads.
     * @defaultValue '/upload'
     */
    endpoint?: string;
    /**
     * Headers to be appended to each HTTP request
     */
    headers?: RequestHeaders | ((file: File) => RequestHeaders);
    /**
     * Custom uploads metadata
     */
    metadata?: Metadata | ((file: File) => Metadata);
    /**
     * Authorization token as a `string` or function returning a `string` or `Promise<string>`
     */
    token?: string | ((httpStatus: number) => string | Promise<string>);
}
interface UploadxControlEvent extends UploadItem {
    readonly uploadId?: string;
    action?: UploadAction;
}
interface UploaderOptions extends UploadItem {
    retryConfig?: RetryConfig;
    /**
     * Set a fixed chunk size.
     * If not specified, the optimal size will be automatically adjusted based on the network speed.
     */
    chunkSize?: number;
    /** Adaptive chunk size limit */
    maxChunkSize?: number;
    withCredentials?: boolean;
    /**
     * Set the expected server response type
     */
    responseType?: 'json' | 'text' | 'document';
    /**
     * Function called before every request
     */
    prerequest?: PreRequest;
    /**
     * Function used to apply authorization token
     */
    authorize?: AuthorizeRequest;
}

interface AjaxRequestConfig extends RequestOptions {
    [x: string]: any;
    data?: BodyInit | null;
    url: string;
}
interface AjaxResponse<T> {
    data: T;
    status: number;
    headers: Record<string, string>;
}
interface Ajax {
    request: <T = string>(config: AjaxRequestConfig) => Promise<AjaxResponse<T>>;
}
declare class UploadxAjax {
    private buildXhr;
    constructor(buildXhr: () => XMLHttpRequest);
    request: <T = string>({ method, data, headers, url, responseType, signal, onUploadProgress, timeout, withCredentials, validateStatus }: AjaxRequestConfig) => Promise<AjaxResponse<T>>;
    getResponseHeaders(xhr: XMLHttpRequest): Record<string, string>;
    getResponseBody<T>(xhr: XMLHttpRequest, responseType?: string): T;
}
declare const UPLOADX_AJAX: InjectionToken<Ajax>;

/**
 * Adaptive chunk size
 */
declare class DynamicChunk {
    /** Maximum chunk size in bytes */
    static maxSize: number;
    /** Minimum chunk size in bytes */
    static minSize: number;
    /** Initial chunk size in bytes */
    static size: number;
    static minChunkTime: number;
    static maxChunkTime: number;
    /**
     * Scales the chunk size based on the throughput.
     * If the elapsed time to upload a chunk is less than the min time, increase the chunk size.
     * If the elapsed time is more than the max time, decrease the chunk size.
     * Keeps the chunk size within the min and max limits.
     * @param throughput - represents the upload rate in bytes/sec.
     */
    static scale(throughput: number): number;
}

/**
 * Uploader Base Class
 */
declare abstract class Uploader implements UploadState {
    readonly file: File;
    readonly options: Readonly<UploaderOptions>;
    readonly stateChange: (uploader: Uploader) => void;
    readonly ajax: Ajax;
    name: string;
    readonly size: number;
    readonly uploadId: string;
    response: ResponseBody;
    responseStatus: number;
    responseHeaders: Record<string, string>;
    progress: number;
    remaining: number;
    speed: number;
    /** Custom headers */
    headers: RequestHeaders;
    /** Metadata Object */
    metadata: Metadata;
    /** Upload endpoint */
    endpoint: string;
    /** Chunk size in bytes */
    chunkSize: number;
    /** Auth token/tokenGetter */
    token: UploadxControlEvent['token'];
    /** Byte offset within the whole file */
    offset?: number;
    /** Retries handler */
    retry: RetryHandler;
    canceler: Canceler;
    abortController: AbortController;
    /** Set HttpRequest responseType */
    responseType?: 'json' | 'text' | 'document';
    protected _authorize: AuthorizeRequest;
    protected _prerequest: PreRequest;
    protected _token: string;
    private _eventsCount;
    constructor(file: File, options: Readonly<UploaderOptions>, stateChange: (uploader: Uploader) => void, ajax: Ajax);
    private _url;
    get url(): string;
    set url(value: string);
    private _status;
    get status(): UploadStatus;
    set status(s: UploadStatus);
    /**
     * Configure uploader
     */
    configure({ metadata, headers, token, endpoint, action }: UploadxControlEvent): void;
    /**
     * Starts uploading
     */
    upload(): Promise<void>;
    /**
     * Performs http requests
     */
    request(requestOptions: RequestOptions): Promise<void>;
    /**
     * Set auth token string
     */
    updateToken: () => string | Promise<string>;
    /**
     * Get file URI
     */
    protected abstract getFileUrl(): Promise<string>;
    /**
     * Send file content and return an offset for the next request
     */
    protected abstract sendFileContent(): Promise<number | undefined>;
    /**
     * Get an offset for the next request
     */
    protected abstract getOffset(): Promise<number | undefined>;
    /**
     *  Updating the metadata of the upload
     */
    protected update<T = {
        metadata?: Metadata;
    }>(_data: T): Promise<string>;
    protected abort(): void;
    protected cancel(): Promise<void>;
    /**
     * Gets the value from the response
     */
    protected getValueFromResponse(key: string): string | null;
    /**
     * Get file chunk
     * @param offset - number of bytes of the file to skip
     * @param size - chunk size
     */
    getChunk(offset?: number, size?: number): {
        start: number;
        end: number;
        body: Blob;
    };
    private getRetryAfterFromBackend;
    private cancelAndSendState;
    private updateAndSendState;
    private cleanup;
    private onProgress;
}

interface UidService {
    generateId(uploader: Uploader): Promise<string> | string;
}
declare class IdService implements UidService {
    generateId(uploader: Uploader): Promise<string> | string;
    static ɵfac: i0.ɵɵFactoryDeclaration<IdService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<IdService>;
}

/**
 * Global Module Options
 */
interface UploadxOptions extends UploaderOptions {
    /**
     * Provide a user-defined class to support another upload protocol or to extend an existing one.
     * @defaultValue UploadX
     */
    uploaderClass?: UploaderClass;
    /**
     * Set the maximum parallel uploads
     * @defaultValue 2
     */
    concurrency?: number;
    /**
     * Automatically start upload when files added
     * @defaultValue true
     */
    autoUpload?: boolean;
    /**
     * File types the user can pick from the file input
     */
    allowedTypes?: string;
    /**
     * Add 'multiple' attribute
     * @defaultValue true
     */
    multiple?: boolean;
    /**
     * Retention time for incomplete uploads
     * @defaultValue 24
     */
    storeIncompleteHours?: number;
}
interface UploadxFactoryOptions extends UploadxOptions {
    endpoint: string;
    autoUpload: boolean;
    concurrency: number;
    uploaderClass: UploaderClass;
    authorize: AuthorizeRequest;
    storeIncompleteHours: number;
}
type UploaderClass = new (file: File, options: UploaderOptions, stateChange: (uploader: Uploader) => void, ajax: Ajax) => Uploader;
declare const UPLOADX_FACTORY_OPTIONS: InjectionToken<UploadxFactoryOptions>;
declare const UPLOADX_OPTIONS: InjectionToken<UploadxOptions>;

declare class Store<T = string> {
    readonly prefix: string;
    private ttl;
    constructor(prefix?: string);
    set(key: string, value: T): void;
    get(key: string): T | null;
    delete(key: string): void;
    clear(maxAgeHours?: number): void;
    private keys;
}
declare const store: Store<string> | Map<string, string>;
declare function isLocalStorageAvailable(): boolean;

/**
 * Implements tus resumable upload protocol
 * {@link https://github.com/tus/tus-resumable-upload-protocol/blob/master/protocol.md  Github}
 */
declare class Tus extends Uploader {
    headers: {
        'Tus-Resumable': string;
    };
    getFileUrl(): Promise<string>;
    sendFileContent(): Promise<number | undefined>;
    getOffset(): Promise<number | undefined>;
    protected getOffsetFromResponse(): number | undefined;
}

/**
 * Implements XHR/CORS Resumable Upload
 * {@link https://github.com/kukhariev/node-uploadx/blob/master/proto.md Github}
 * @see {@link https://developers.google.com/drive/api/v3/manage-uploads#resumable Google Drive API documentation}
 */
declare class UploaderX extends Uploader {
    responseType: "json";
    getFileUrl(): Promise<string>;
    sendFileContent(): Promise<number | undefined>;
    getOffset(): Promise<number | undefined>;
    update<T>(data: T): Promise<string>;
    protected getOffsetFromResponse(): number | undefined;
}
declare function getRangeEnd(range?: string): number;

declare class UploadxDirective implements OnInit {
    set uploadx(value: UploadxOptions | '');
    options: UploadxOptions;
    set control(value: UploadxControlEvent | '');
    state: EventEmitter<UploadState>;
    private readonly elementRef;
    private readonly renderer;
    private readonly uploadService;
    ngOnInit(): void;
    fileChange(event: Event): void;
    fileListener(files?: FileList | File[]): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<UploadxDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<UploadxDirective, "[uploadx]", never, { "uploadx": { "alias": "uploadx"; "required": false; }; "options": { "alias": "options"; "required": false; }; "control": { "alias": "control"; "required": false; }; }, { "state": "state"; }, never, never, true, never>;
}

declare class UploadxDropDirective {
    active: boolean;
    fileInput?: UploadxDirective;
    private readonly uploadService;
    dropHandler(event: DragEvent): void;
    onDragOver(event: DragEvent): void;
    onDragLeave(event: DragEvent): void;
    /**
     * Extracts the files from a `DragEvent` object
     */
    getFiles(event: DragEvent): FileList | File[];
    protected _stopEvents(event: DragEvent): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<UploadxDropDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<UploadxDropDirective, "[uploadxDrop]", never, {}, {}, ["fileInput"], never, true, never>;
}

declare class UploadxModule {
    static withConfig(options: UploadxOptions): ModuleWithProviders<UploadxModule>;
    static ɵfac: i0.ɵɵFactoryDeclaration<UploadxModule, never>;
    static ɵmod: i0.ɵɵNgModuleDeclaration<UploadxModule, never, [typeof UploadxDirective, typeof UploadxDropDirective], [typeof UploadxDirective, typeof UploadxDropDirective]>;
    static ɵinj: i0.ɵɵInjectorDeclaration<UploadxModule>;
}

/**
 * Provides configuration options for standalone app.
 *
 * @example
 * ```ts
 * bootstrapApplication(AppComponent, {
 *   providers: [
 *     provideUploadx({
 *       endpoint: uploadUrl,
 *       allowedTypes: 'video/*,audio/*',
 *       maxChunkSize: 96 * 1024 * 1024
 *     })
 *   ]
 * });
 * ```
 */
declare function provideUploadx(options?: UploadxOptions): Provider[];

declare const UPLOAD_STATE_KEYS: (keyof UploadState)[];
declare class UploadxService implements OnDestroy {
    /** Upload Queue */
    queue: Uploader[];
    readonly options: UploadxFactoryOptions;
    private readonly eventsStream;
    private subs;
    private ngZone;
    readonly ajax: Ajax;
    private idService;
    constructor();
    /** Upload status events */
    get events(): Observable<UploadState>;
    /**
     * Initializes service
     * @param options global module options
     * @returns Observable that emits a new value on progress or status changes
     */
    init(options?: UploadxOptions): Observable<UploadState>;
    /**
     * Initializes service
     * @param options global module options
     * @returns Observable that emits the current array of uploaders
     */
    connect(options?: UploadxOptions): Observable<Uploader[]>;
    /**
     * Terminates all uploads and clears the queue
     */
    disconnect(): void;
    /**
     * Returns current uploads state
     * @example
     * // restore background uploads
     * this.uploads = this.uploadService.state();
     */
    state(): UploadState[];
    ngOnDestroy(): void;
    /**
     * Creates uploaders for files and adds them to the upload queue
     */
    handleFiles(files: FileList | File | File[], options?: UploadxOptions): void;
    /**
     * Upload control
     * @example
     * // pause all
     * this.uploadService.control({ action: 'pause' });
     * // pause upload with uploadId
     * this.uploadService.control({ action: 'pause', uploadId});
     * // set token
     * this.uploadService.control({ token: `TOKEN` });
     */
    control(evt: UploadxControlEvent): void;
    /**
     * Number of active uploads
     */
    get activeUploadsCount(): number;
    /**
     * Performs http requests
     */
    request<T = string>(config: AjaxRequestConfig): Promise<AjaxResponse<T>>;
    private stateChange;
    private addUploaderInstance;
    private processQueue;
    static ɵfac: i0.ɵɵFactoryDeclaration<UploadxService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<UploadxService>;
}

declare function resolveUrl(url: string, base: string): string;
/**
 * Unwraps a value if it is a function, otherwise returns the value directly.
 * Useful for allowing values to optionally be specified as functions.
 */
declare function unfunc<T, V>(value: T | ((ref: V) => T), ref: V): T;
declare const pick: <T, K extends keyof T>(obj: T, props: K[]) => Pick<T, K>;
declare function isNumber(x?: unknown): x is number;
/**
 * 32-bit FNV-1a hash function
 */
declare function createHash(str: string): number;
/**
 * Utility functions for base64 encoding and decoding strings and objects.
 */
declare const b64: {
    encode: (str: string) => string;
    decode: (str: string) => string;
    serialize: (obj: Record<string, unknown>) => string;
    parse: (encoded: string) => Record<string, string>;
};
declare function isBrowser(): boolean;
declare function onLine(): boolean;

export { Canceler, DynamicChunk, ErrorType, IdService, RetryHandler, Store, Tus, UPLOADX_AJAX, UPLOADX_FACTORY_OPTIONS, UPLOADX_OPTIONS, UPLOAD_STATE_KEYS, Uploader, UploaderX, UploadxAjax, UploadxDirective, UploadxDropDirective, UploadxModule, UploadxService, b64, createHash, getRangeEnd, isBrowser, isLocalStorageAvailable, isNumber, onLine, pick, provideUploadx, resolveUrl, store, unfunc };
export type { Ajax, AjaxRequestConfig, AjaxResponse, AuthorizeRequest, KeepPartialFunction, Metadata, PreRequest, RequestConfig, RequestHeaders, RequestOptions, ResponseBody, RetryConfig, ShouldRetryFunction, UidService, UploadAction, UploadState, UploadStatus, UploaderClass, UploaderOptions, UploadxControlEvent, UploadxFactoryOptions, UploadxOptions };