import type { BrowserWindow, SaveDialogOptions } from "electron";
import type { DownloadData } from "./DownloadData";
/**
 * The download has started
 */
export type DownloadStartedFn = (data: DownloadData) => Promise<void> | void;
/**
 * There is progress on the download
 */
export type DownloadProgressFn = (data: DownloadData) => Promise<void> | void;
/**
 * The download has been cancelled
 */
export type DownloadCancelledFn = (data: DownloadData) => Promise<void> | void;
/**
 * The download has completed
 */
export type DownloadCompletedFn = (data: DownloadData) => Promise<void> | void;
/**
 * The download was interrupted
 */
export type DownloadInterruptedFn = (data: DownloadData) => Promise<void> | void;
/**
 * The download has failed
 */
export type ErrorFn = (error: Error, data?: DownloadData) => Promise<void> | void;
/**
 * Function for logging internal debug messages
 */
export type DebugLoggerFn = (message: string) => void;
export interface DownloadManagerConstructorParams {
    /**
     * If defined, will log out internal debug messages. Useful for
     * troubleshooting downloads. Does not log out progress due to
     * how frequent it can be.
     */
    debugLogger?: DebugLoggerFn;
}
export interface DownloadManagerCallbacks {
    /**
     * When the download has started. When using a "save as" dialog,
     * this will be called after the user has selected a location.
     *
     * This will always be called first before the progress and completed events.
     */
    onDownloadStarted?: DownloadStartedFn;
    /**
     * When there is a progress update on a download. Note: This
     * may be skipped entirely in some cases, where the download
     * completes immediately. In that case, onDownloadCompleted
     * will be called instead.
     */
    onDownloadProgress?: DownloadProgressFn;
    /**
     * When the download has completed
     */
    onDownloadCompleted?: DownloadCompletedFn;
    /**
     * When the download has been cancelled. Also called if the user cancels
     * from the save as dialog.
     */
    onDownloadCancelled?: DownloadCancelledFn;
    /**
     * When the download has been interrupted. This could be due to a bad
     * connection, the server going down, etc.
     */
    onDownloadInterrupted?: DownloadInterruptedFn;
    /**
     * When an error has been encountered.
     * Note: The signature is (error, <maybe some data>).
     */
    onError?: ErrorFn;
}
export interface DownloadConfig {
    /**
     * The Electron.BrowserWindow instance
     */
    window: BrowserWindow;
    /**
     * The URL to download
     */
    url: string;
    /**
     * The callbacks to define to listen for download events
     */
    callbacks: DownloadManagerCallbacks;
    /**
     * Electron.DownloadURLOptions to pass to the downloadURL method
     *
     * @see https://www.electronjs.org/docs/latest/api/session#sesdownloadurlurl-options
     */
    downloadURLOptions?: Electron.DownloadURLOptions;
    /**
     * If defined, will show a save dialog when the user
     * downloads a file.
     *
     * @see https://www.electronjs.org/docs/latest/api/dialog#dialogshowsavedialogbrowserwindow-options
     */
    saveDialogOptions?: SaveDialogOptions;
    /**
     * The filename to save the file as. If not defined, the filename
     * from the server will be used.
     *
     * Only applies if saveDialogOptions is not defined.
     */
    saveAsFilename?: string;
    /**
     * The directory to save the file to. Must be an absolute path.
     * @default The user's downloads directory
     */
    directory?: string;
    /**
     * If true, will overwrite the file if it already exists
     * @default false
     */
    overwrite?: boolean;
}
export interface IElectronDownloadManager {
    /**
     * Starts a download. If saveDialogOptions has been defined in the config,
     * the saveAs dialog will show up first.
     *
     * Returns the id of the download.
     *
     * This *must* be called with `await` or unintended behavior may occur.
     */
    download(params: DownloadConfig): Promise<string>;
    /**
     * Cancels a download
     */
    cancelDownload(id: string): void;
    /**
     * Pauses a download
     */
    pauseDownload(id: string): void;
    /**
     * Resumes a download
     */
    resumeDownload(id: string): void;
    /**
     * Returns the number of active downloads
     */
    getActiveDownloadCount(): number;
    /**
     * Returns the data for a download
     */
    getDownloadData(id: string): DownloadData | undefined;
}