import { HandlerCallbackOptions, WorkboxPlugin, WorkboxPluginCallbackParam } from 'workbox-core/types.js';
import { Strategy } from './Strategy.js';
import './_version.js';
/**
 * A class created every time a Strategy instance instance calls
 * {@link workbox-strategies.Strategy~handle} or
 * {@link workbox-strategies.Strategy~handleAll} that wraps all fetch and
 * cache actions around plugin callbacks and keeps track of when the strategy
 * is "done" (i.e. all added `event.waitUntil()` promises have resolved).
 *
 * @memberof workbox-strategies
 */
declare class StrategyHandler {
    request: Request;
    url?: URL;
    event: ExtendableEvent;
    params?: any;
    private _cacheKeys;
    private readonly _strategy;
    private readonly _extendLifetimePromises;
    private readonly _handlerDeferred;
    private readonly _plugins;
    private readonly _pluginStateMap;
    /**
     * Creates a new instance associated with the passed strategy and event
     * that's handling the request.
     *
     * The constructor also initializes the state that will be passed to each of
     * the plugins handling this request.
     *
     * @param {workbox-strategies.Strategy} strategy
     * @param {Object} options
     * @param {Request|string} options.request A request to run this strategy for.
     * @param {ExtendableEvent} options.event The event associated with the
     *     request.
     * @param {URL} [options.url]
     * @param {*} [options.params] The return value from the
     *     {@link workbox-routing~matchCallback} (if applicable).
     */
    constructor(strategy: Strategy, options: HandlerCallbackOptions);
    /**
     * Fetches a given request (and invokes any applicable plugin callback
     * methods) using the `fetchOptions` (for non-navigation requests) and
     * `plugins` defined on the `Strategy` object.
     *
     * The following plugin lifecycle methods are invoked when using this method:
     * - `requestWillFetch()`
     * - `fetchDidSucceed()`
     * - `fetchDidFail()`
     *
     * @param {Request|string} input The URL or request to fetch.
     * @return {Promise<Response>}
     */
    fetch(input: RequestInfo): Promise<Response>;
    /**
     * Calls `this.fetch()` and (in the background) runs `this.cachePut()` on
     * the response generated by `this.fetch()`.
     *
     * The call to `this.cachePut()` automatically invokes `this.waitUntil()`,
     * so you do not have to manually call `waitUntil()` on the event.
     *
     * @param {Request|string} input The request or URL to fetch and cache.
     * @return {Promise<Response>}
     */
    fetchAndCachePut(input: RequestInfo): Promise<Response>;
    /**
     * Matches a request from the cache (and invokes any applicable plugin
     * callback methods) using the `cacheName`, `matchOptions`, and `plugins`
     * defined on the strategy object.
     *
     * The following plugin lifecycle methods are invoked when using this method:
     * - cacheKeyWillByUsed()
     * - cachedResponseWillByUsed()
     *
     * @param {Request|string} key The Request or URL to use as the cache key.
     * @return {Promise<Response|undefined>} A matching response, if found.
     */
    cacheMatch(key: RequestInfo): Promise<Response | undefined>;
    /**
     * Puts a request/response pair in the cache (and invokes any applicable
     * plugin callback methods) using the `cacheName` and `plugins` defined on
     * the strategy object.
     *
     * The following plugin lifecycle methods are invoked when using this method:
     * - cacheKeyWillByUsed()
     * - cacheWillUpdate()
     * - cacheDidUpdate()
     *
     * @param {Request|string} key The request or URL to use as the cache key.
     * @param {Response} response The response to cache.
     * @return {Promise<boolean>} `false` if a cacheWillUpdate caused the response
     * not be cached, and `true` otherwise.
     */
    cachePut(key: RequestInfo, response: Response): Promise<boolean>;
    /**
     * Checks the list of plugins for the `cacheKeyWillBeUsed` callback, and
     * executes any of those callbacks found in sequence. The final `Request`
     * object returned by the last plugin is treated as the cache key for cache
     * reads and/or writes. If no `cacheKeyWillBeUsed` plugin callbacks have
     * been registered, the passed request is returned unmodified
     *
     * @param {Request} request
     * @param {string} mode
     * @return {Promise<Request>}
     */
    getCacheKey(request: Request, mode: 'read' | 'write'): Promise<Request>;
    /**
     * Returns true if the strategy has at least one plugin with the given
     * callback.
     *
     * @param {string} name The name of the callback to check for.
     * @return {boolean}
     */
    hasCallback<C extends keyof WorkboxPlugin>(name: C): boolean;
    /**
     * Runs all plugin callbacks matching the given name, in order, passing the
     * given param object (merged ith the current plugin state) as the only
     * argument.
     *
     * Note: since this method runs all plugins, it's not suitable for cases
     * where the return value of a callback needs to be applied prior to calling
     * the next callback. See
     * {@link workbox-strategies.StrategyHandler#iterateCallbacks}
     * below for how to handle that case.
     *
     * @param {string} name The name of the callback to run within each plugin.
     * @param {Object} param The object to pass as the first (and only) param
     *     when executing each callback. This object will be merged with the
     *     current plugin state prior to callback execution.
     */
    runCallbacks<C extends keyof NonNullable<WorkboxPlugin>>(name: C, param: Omit<WorkboxPluginCallbackParam[C], 'state'>): Promise<void>;
    /**
     * Accepts a callback and returns an iterable of matching plugin callbacks,
     * where each callback is wrapped with the current handler state (i.e. when
     * you call each callback, whatever object parameter you pass it will
     * be merged with the plugin's current state).
     *
     * @param {string} name The name fo the callback to run
     * @return {Array<Function>}
     */
    iterateCallbacks<C extends keyof WorkboxPlugin>(name: C): Generator<NonNullable<WorkboxPlugin[C]>>;
    /**
     * Adds a promise to the
     * [extend lifetime promises]{@link https://w3c.github.io/ServiceWorker/#extendableevent-extend-lifetime-promises}
     * of the event event associated with the request being handled (usually a
     * `FetchEvent`).
     *
     * Note: you can await
     * {@link workbox-strategies.StrategyHandler~doneWaiting}
     * to know when all added promises have settled.
     *
     * @param {Promise} promise A promise to add to the extend lifetime promises
     *     of the event that triggered the request.
     */
    waitUntil<T>(promise: Promise<T>): Promise<T>;
    /**
     * Returns a promise that resolves once all promises passed to
     * {@link workbox-strategies.StrategyHandler~waitUntil}
     * have settled.
     *
     * Note: any work done after `doneWaiting()` settles should be manually
     * passed to an event's `waitUntil()` method (not this handler's
     * `waitUntil()` method), otherwise the service worker thread my be killed
     * prior to your work completing.
     */
    doneWaiting(): Promise<void>;
    /**
     * Stops running the strategy and immediately resolves any pending
     * `waitUntil()` promises.
     */
    destroy(): void;
    /**
     * This method will call cacheWillUpdate on the available plugins (or use
     * status === 200) to determine if the Response is safe and valid to cache.
     *
     * @param {Request} options.request
     * @param {Response} options.response
     * @return {Promise<Response|undefined>}
     *
     * @private
     */
    _ensureResponseSafeToCache(response: Response): Promise<Response | undefined>;
}
export { StrategyHandler };