/*
  Copyright 2018 Google LLC

  Use of this source code is governed by an MIT-style
  license that can be found in the LICENSE file or at
  https://opensource.org/licenses/MIT.
*/
import { WorkboxError } from './WorkboxError.js';
import { logger } from './logger.js';
import { assert } from './assert.js';
import { getFriendlyURL } from '../_private/getFriendlyURL.js';
import { pluginUtils } from '../utils/pluginUtils.js';
import '../_version.js';
/**
 * Wrapper around the fetch API.
 *
 * Will call requestWillFetch on available plugins.
 *
 * @param {Object} options
 * @param {Request|string} options.request
 * @param {Object} [options.fetchOptions]
 * @param {ExtendableEvent} [options.event]
 * @param {Array<Object>} [options.plugins=[]]
 * @return {Promise<Response>}
 *
 * @private
 * @memberof module:workbox-core
 */
const wrappedFetch = async ({ request, fetchOptions, event, plugins = [], }) => {
    if (typeof request === 'string') {
        request = new Request(request);
    }
    // We *should* be able to call `await event.preloadResponse` even if it's
    // undefined, but for some reason, doing so leads to errors in our Node unit
    // tests. To work around that, explicitly check preloadResponse's value first.
    if (event instanceof FetchEvent && event.preloadResponse) {
        const possiblePreloadResponse = await event.preloadResponse;
        if (possiblePreloadResponse) {
            if (process.env.NODE_ENV !== 'production') {
                logger.log(`Using a preloaded navigation response for ` +
                    `'${getFriendlyURL(request.url)}'`);
            }
            return possiblePreloadResponse;
        }
    }
    if (process.env.NODE_ENV !== 'production') {
        assert.isInstance(request, Request, {
            paramName: 'request',
            expectedClass: Request,
            moduleName: 'workbox-core',
            className: 'fetchWrapper',
            funcName: 'wrappedFetch',
        });
    }
    const failedFetchPlugins = pluginUtils.filter(plugins, "fetchDidFail" /* FETCH_DID_FAIL */);
    // If there is a fetchDidFail plugin, we need to save a clone of the
    // original request before it's either modified by a requestWillFetch
    // plugin or before the original request's body is consumed via fetch().
    const originalRequest = failedFetchPlugins.length > 0 ?
        request.clone() : null;
    try {
        for (const plugin of plugins) {
            if ("requestWillFetch" /* REQUEST_WILL_FETCH */ in plugin) {
                const pluginMethod = plugin["requestWillFetch" /* REQUEST_WILL_FETCH */];
                const requestClone = request.clone();
                request = await pluginMethod.call(plugin, {
                    request: requestClone,
                    event,
                });
                if (process.env.NODE_ENV !== 'production') {
                    if (request) {
                        assert.isInstance(request, Request, {
                            moduleName: 'Plugin',
                            funcName: "cachedResponseWillBeUsed" /* CACHED_RESPONSE_WILL_BE_USED */,
                            isReturnValueProblem: true,
                        });
                    }
                }
            }
        }
    }
    catch (err) {
        throw new WorkboxError('plugin-error-request-will-fetch', {
            thrownError: err,
        });
    }
    // The request can be altered by plugins with `requestWillFetch` making
    // the original request (Most likely from a `fetch` event) to be different
    // to the Request we make. Pass both to `fetchDidFail` to aid debugging.
    const pluginFilteredRequest = request.clone();
    try {
        let fetchResponse;
        // See https://github.com/GoogleChrome/workbox/issues/1796
        if (request.mode === 'navigate') {
            fetchResponse = await fetch(request);
        }
        else {
            fetchResponse = await fetch(request, fetchOptions);
        }
        if (process.env.NODE_ENV !== 'production') {
            logger.debug(`Network request for ` +
                `'${getFriendlyURL(request.url)}' returned a response with ` +
                `status '${fetchResponse.status}'.`);
        }
        for (const plugin of plugins) {
            if ("fetchDidSucceed" /* FETCH_DID_SUCCEED */ in plugin) {
                fetchResponse = await plugin["fetchDidSucceed" /* FETCH_DID_SUCCEED */]
                    .call(plugin, {
                    event,
                    request: pluginFilteredRequest,
                    response: fetchResponse,
                });
                if (process.env.NODE_ENV !== 'production') {
                    if (fetchResponse) {
                        assert.isInstance(fetchResponse, Response, {
                            moduleName: 'Plugin',
                            funcName: "fetchDidSucceed" /* FETCH_DID_SUCCEED */,
                            isReturnValueProblem: true,
                        });
                    }
                }
            }
        }
        return fetchResponse;
    }
    catch (error) {
        if (process.env.NODE_ENV !== 'production') {
            logger.error(`Network request for ` +
                `'${getFriendlyURL(request.url)}' threw an error.`, error);
        }
        for (const plugin of failedFetchPlugins) {
            await plugin["fetchDidFail" /* FETCH_DID_FAIL */].call(plugin, {
                error,
                event,
                originalRequest: originalRequest.clone(),
                request: pluginFilteredRequest.clone(),
            });
        }
        throw error;
    }
};
const fetchWrapper = {
    fetch: wrappedFetch,
};
export { fetchWrapper };