"use strict";
/**
 * Copyright 2016 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
Object.defineProperty(exports, "__esModule", { value: true });
const google_auth_library_1 = require("google-auth-library");
const qs = require("qs");
const stream = require("stream");
const urlTemplate = require("url-template");
const uuid = require("uuid");
const extend = require("extend");
const isbrowser_1 = require("./isbrowser");
// tslint:disable-next-line no-var-requires
const pkg = require('../../package.json');
function isReadableStream(obj) {
    return obj instanceof stream.Readable && typeof obj._read === 'function';
}
function getMissingParams(params, required) {
    const missing = new Array();
    required.forEach(param => {
        // Is the required param in the params object?
        if (params[param] === undefined) {
            missing.push(param);
        }
    });
    // If there are any required params missing, return their names in array,
    // otherwise return null
    return missing.length > 0 ? missing : null;
}
function createAPIRequest(parameters, callback) {
    if (callback) {
        createAPIRequestAsync(parameters).then(r => callback(null, r), callback);
    }
    else {
        return createAPIRequestAsync(parameters);
    }
}
exports.createAPIRequest = createAPIRequest;
async function createAPIRequestAsync(parameters) {
    let params = parameters.params;
    const options = Object.assign({}, parameters.options);
    // Create a new params object so it can no longer be modified from outside
    // code Also support global and per-client params, but allow them to be
    // overriden per-request
    const topOptions = parameters.context.google &&
        parameters.context.google._options &&
        parameters.context.google._options.params
        ? parameters.context.google._options.params
        : {};
    params = Object.assign({}, // New base object
    topOptions, // Global params
    parameters.context._options.params, // Per-client params
    params // API call params
    );
    const media = params.media || {};
    /**
     * In a previous version of this API, the request body was stuffed in a field
     * named `resource`.  This caused lots of problems, because it's not uncommon
     * to have an actual named parameter required which is also named `resource`.
     * This meant that users would have to use `resource_` in those cases, which
     * pretty much nobody figures out on their own. The request body is now
     * documented as being in the `requestBody` property, but we also need to keep
     * using `resource` for reasons of back-compat. Cases that need to be covered
     * here:
     * - user provides just a `resource` with a request body
     * - user provides both a `resource` and a `resource_`
     * - user provides just a `requestBody`
     * - user provides both a `requestBody` and a `resource`
     */
    let resource = params.requestBody;
    if (!params.requestBody &&
        params.resource &&
        (!parameters.requiredParams.includes('resource') ||
            typeof params.resource !== 'string')) {
        resource = params.resource;
        delete params.resource;
    }
    delete params.requestBody;
    let authClient = params.auth ||
        parameters.context._options.auth ||
        (parameters.context.google
            ? parameters.context.google._options.auth
            : null);
    const defaultMime = typeof media.body === 'string' ? 'text/plain' : 'application/octet-stream';
    delete params.media;
    delete params.auth;
    // Grab headers from user provided options
    const headers = params.headers || {};
    populateAPIHeader(headers);
    delete params.headers;
    // Un-alias parameters that were modified due to conflicts with reserved names
    Object.keys(params).forEach(key => {
        if (key.slice(-1) === '_') {
            const newKey = key.slice(0, -1);
            params[newKey] = params[key];
            delete params[key];
        }
    });
    // Check for missing required parameters in the API request
    const missingParams = getMissingParams(params, parameters.requiredParams);
    if (missingParams) {
        // Some params are missing - stop further operations and inform the
        // developer which required params are not included in the request
        throw new Error('Missing required parameters: ' + missingParams.join(', '));
    }
    // Parse urls
    if (options.url) {
        options.url = urlTemplate.parse(options.url).expand(params);
    }
    if (parameters.mediaUrl) {
        parameters.mediaUrl = urlTemplate.parse(parameters.mediaUrl).expand(params);
    }
    // When forming the querystring, override the serializer so that array
    // values are serialized like this:
    // myParams: ['one', 'two'] ---> 'myParams=one&myParams=two'
    // This serializer also encodes spaces in the querystring as `%20`,
    // whereas the default serializer in gaxios encodes to a `+`.
    options.paramsSerializer = params => {
        return qs.stringify(params, { arrayFormat: 'repeat' });
    };
    // delete path parameters from the params object so they do not end up in
    // query
    parameters.pathParams.forEach(param => {
        delete params[param];
        if (parameters.context &&
            parameters.context._options &&
            parameters.context._options.params) {
            delete parameters.context._options.params[param];
        }
    });
    // if authClient is actually a string, use it as an API KEY
    if (typeof authClient === 'string') {
        params.key = params.key || authClient;
        authClient = undefined;
    }
    if (parameters.mediaUrl && media.body) {
        options.url = parameters.mediaUrl;
        if (resource) {
            // gaxios doesn't support multipart/related uploads, so it has to
            // be implemented here.
            params.uploadType = 'multipart';
            const multipart = [
                { 'Content-Type': 'application/json', body: JSON.stringify(resource) },
                {
                    'Content-Type': media.mimeType || (resource && resource.mimeType) || defaultMime,
                    body: media.body,
                },
            ];
            const boundary = uuid.v4();
            const finale = `--${boundary}--`;
            const rStream = new stream.PassThrough({
                flush(callback) {
                    this.push('\r\n');
                    this.push(finale);
                    callback();
                },
            });
            const pStream = new ProgressStream();
            const isStream = isReadableStream(multipart[1].body);
            headers['Content-Type'] = `multipart/related; boundary=${boundary}`;
            for (const part of multipart) {
                const preamble = `--${boundary}\r\nContent-Type: ${part['Content-Type']}\r\n\r\n`;
                rStream.push(preamble);
                if (typeof part.body === 'string') {
                    rStream.push(part.body);
                    rStream.push('\r\n');
                }
                else {
                    // Gaxios does not natively support onUploadProgress in node.js.
                    // Pipe through the pStream first to read the number of bytes read
                    // for the purpose of tracking progress.
                    pStream.on('progress', bytesRead => {
                        if (options.onUploadProgress) {
                            options.onUploadProgress({ bytesRead });
                        }
                    });
                    part.body.pipe(pStream).pipe(rStream);
                }
            }
            if (!isStream) {
                rStream.push(finale);
                rStream.push(null);
            }
            options.data = rStream;
        }
        else {
            params.uploadType = 'media';
            Object.assign(headers, { 'Content-Type': media.mimeType || defaultMime });
            options.data = media.body;
        }
    }
    else {
        options.data = resource || undefined;
    }
    options.headers = extend(true, options.headers || {}, headers);
    options.params = params;
    if (!isbrowser_1.isBrowser()) {
        options.headers['Accept-Encoding'] = 'gzip';
        const directives = options.userAgentDirectives || [];
        directives.push({
            product: 'google-api-nodejs-client',
            version: pkg.version,
            comment: 'gzip',
        });
        const userAgent = directives
            .map(d => {
            let line = `${d.product}/${d.version}`;
            if (d.comment) {
                line += ` (${d.comment})`;
            }
            return line;
        })
            .join(' ');
        options.headers['User-Agent'] = userAgent;
    }
    // By default gaxios treats any 2xx as valid, and all non 2xx status
    // codes as errors.  This is a problem for HTTP 304s when used along
    // with an eTag.
    if (!options.validateStatus) {
        options.validateStatus = status => {
            return (status >= 200 && status < 300) || status === 304;
        };
    }
    // Retry by default
    options.retry = options.retry === undefined ? true : options.retry;
    // Combine the GaxiosOptions options passed with this specific
    // API call witht the global options configured at the API Context
    // level, or at the global level.
    const mergedOptions = extend(true, {}, parameters.context.google ? parameters.context.google._options : {}, parameters.context._options, options);
    delete mergedOptions.auth; // is overridden by our auth code
    // Perform the HTTP request.  NOTE: this function used to return a
    // mikeal/request object. Since the transition to Axios, the method is
    // now void.  This may be a source of confusion for users upgrading from
    // version 24.0 -> 25.0 or up.
    if (authClient && typeof authClient === 'object') {
        return authClient.request(mergedOptions);
    }
    else {
        return new google_auth_library_1.DefaultTransporter().request(mergedOptions);
    }
}
/**
 * Basic Passthrough Stream that records the number of bytes read
 * every time the cursor is moved.
 */
class ProgressStream extends stream.Transform {
    constructor() {
        super(...arguments);
        this.bytesRead = 0;
    }
    // tslint:disable-next-line: no-any
    _transform(chunk, encoding, callback) {
        this.bytesRead += chunk.length;
        this.emit('progress', this.bytesRead);
        this.push(chunk);
        callback();
    }
}
function populateAPIHeader(headers) {
    // TODO: we should eventually think about adding browser support for this
    // populating the gl-web header (web support should also be added to
    // google-auth-library-nodejs).
    if (!isbrowser_1.isBrowser()) {
        headers['x-goog-api-client'] = `gdcl/${pkg.version} gl-node/${process.versions.node}`;
    }
}
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