import type { Observable } from 'rxjs';
import type { NgxFileUploadValidation } from '..';
import type { NgxFileUploadForm } from '../../upload/src/upload.form';
import type { NgxFileUploadValidationErrors } from './validation';
import type { HttpErrorResponse, HttpResponse } from '@angular/common/http';
export declare enum NgxFileUploadState {
    INVALID = 0,
    IDLE = 1,
    START = 2,
    PENDING = 3,
    CONNECT = 4,
    PROGRESS = 5,
    CANCELED = 6,
    COMPLETED = 7
}
export interface NgxFileUploadControl {
    retry(): void;
    start(): void;
    stop(): void;
    remove(): void;
}
export interface UploadValidation {
    errors: NgxFileUploadValidationErrors | null;
}
export interface INgxFileUploadFile {
    readonly raw: File;
    readonly size: number;
    readonly name: string;
    readonly type: string;
    validationErrors: NgxFileUploadValidationErrors | null;
}
export interface INgxFileUploadRequestData {
    readonly files: INgxFileUploadFile[];
    readonly size: number;
    readonly name: string[];
    response: HttpResponse<unknown> | HttpErrorResponse | null;
    state: NgxFileUploadState;
    uploaded: number;
    validationErrors: NgxFileUploadValidationErrors | null;
    progress: number;
    hasError: boolean;
}
export interface INgxFileUploadRequestModel extends INgxFileUploadRequestData {
    toJson(): INgxFileUploadRequestData;
}
export declare type BeforeStartFn = (request: INgxFileUploadRequest) => boolean | Observable<boolean> | Promise<boolean>;
export interface INgxFileUploadRequest {
    requestId: string;
    /**
     * returns observable which notify if file upload state
     * has been changed
     */
    readonly change: Observable<INgxFileUploadRequestData>;
    readonly data: INgxFileUploadRequestData;
    readonly destroyed: Observable<boolean>;
    readonly form: NgxFileUploadForm;
    url: string;
    state: NgxFileUploadState;
    /**
     * @description add additional headers to request
     */
    addHeader(name: string, value: string): void;
    /**
     * @description gets header from request
     */
    getHeader(name: string): string | undefined | AuthorizationHeader;
    /**
     * @description remove additional headers from request
     */
    removeHeader(name: string): void;
    beforeStart(hook: BeforeStartFn): void;
    destroy(): void;
    /**
     * cancel current file upload, this will complete change subject
     */
    cancel(): void;
    /**
     * return true if upload was not completed since the server
     * sends back an error response
     */
    hasError(): boolean;
    isIdle(): boolean;
    /**
     * returns true if validators are set and upload not validated
     */
    isInvalid(): boolean;
    isProgress(): boolean;
    isPending(): boolean;
    isCompleted(ignoreError?: boolean): boolean;
    isCanceled(): boolean;
    removeInvalidFiles(): void;
    retry(): void;
    start(): void;
}
export interface NgxFileUploadStorageConfig {
    /**
     * max count of uploads at once, set to -1 for no limit
     */
    concurrentUploads: number;
    /**
     * if set to true it will automatically starts uploads
     */
    autoStart?: boolean;
    /**
     * if set it will remove success full completed uploads after a specific
     * amount of time.
     */
    removeCompleted?: number;
}
export interface AuthorizationHeader {
    key?: string;
    token: string;
}
export interface NgxFileUploadHeaders {
    [key: string]: string | AuthorizationHeader | undefined;
    authorization?: string | AuthorizationHeader;
}
export interface NgxFileuploadFormControl {
    validator?: NgxFileUploadValidation<NgxFileuploadFormControl>;
    value?: unknown;
    valid: boolean;
    errors: NgxFileUploadValidationErrors | null;
    /**
     * @description form control is dirty, validator, value changed
     */
    dirty: boolean;
    /**
     * @description if set to false form control will not attached to form-data or headers. Default is true.
     * This becomes useful is this formcontrol is only used internal and we need some meta data inside beforeStartFn.
     *
     * @example
     *
     * ```
     * @todo
     * ```
     */
    send?: boolean;
}
export interface NgxFileuploadFormGroup {
    [key: string]: NgxFileuploadFormControl;
}
export declare type NgxFileUploadFormControlOptions = Pick<NgxFileuploadFormControl, 'send' | 'validator' | 'value'>;
/**
 * Upload Options
 */
export interface NgxFileUploadOptions {
    /**
     * url which should used to upload file
     */
    url: string;
    /**
     * @description
     */
    headers?: NgxFileUploadHeaders;
    /**
     * @todo docs
     */
    formControls?: Record<string, NgxFileUploadFormControlOptions>;
    /**
     * @description only used if transferMethod is body, so form control names will attached
     * to headers. If formControlNameToKebabCase is set to true name will transformed.
     *
     * default is false
     *
     * @example
     *
     * default behavior
     *
     * ```
     * const config: NgxFileUploadOptions = {
     *   transferMethod: 'body',
     *   formControls: {
     *     userId: {
     *       value: 10
     *     }
     *   }
     * }
     * // header sent userId: 10
     * ```
     *
     * @example
     *
     * formControlNameToKebabCase set to true
     *
     * ```
     * const config: NgxFileUploadOptions = {
     *   transferMethod: 'body',
     *   formControlNameToKebabCase: true,
     *   formControls: {
     *     userId: {
     *       value: 10,
     *     }
     *   }
     * }
     * // header sent User-Id: 10
     * ```
     */
    formControlNameToKebabCase?: boolean;
    /**
     * @description how the file will be send. If set to formdata it will create a FormData Object and attach file to files (good for multiple files at once)
     * Otherwise it will send file as body directly to server.
     *
     * Default is formdata.
     */
    transferMethod?: 'body' | 'formdata';
    /**
     * if set to true will include HTTP-only cookies with the request
     */
    withCredentials?: boolean;
}