/**
 * Copyright 2022 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
 *
 *     https://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.
 */
/* eslint-disable camelcase */
// [START apps_script_api_quickstart]
const fs = require('fs').promises;
const path = require('path');
const process = require('process');
const {authenticate} = require('@google-cloud/local-auth');
const {google} = require('googleapis');

// If modifying these scopes, delete token.json.
const SCOPES = ['https://www.googleapis.com/auth/script.projects'];
// The file token.json stores the user's access and refresh tokens, and is
// created automatically when the authorization flow completes for the first
// time.
const TOKEN_PATH = path.join(process.cwd(), 'token.json');
const CREDENTIALS_PATH = path.join(process.cwd(), 'credentials.json');

/**
 * Reads previously authorized credentials from the save file.
 *
 * @return {Promise<OAuth2Client|null>}
 */
async function loadSavedCredentialsIfExist() {
  try {
    const content = await fs.readFile(TOKEN_PATH);
    const credentials = JSON.parse(content);
    return google.auth.fromJSON(credentials);
  } catch (err) {
    return null;
  }
}

/**
 * Serializes credentials to a file compatible with GoogleAuth.fromJSON.
 *
 * @param {OAuth2Client} client
 * @return {Promise<void>}
 */
async function saveCredentials(client) {
  const content = await fs.readFile(CREDENTIALS_PATH);
  const keys = JSON.parse(content);
  const key = keys.installed || keys.web;
  const payload = JSON.stringify({
    type: 'authorized_user',
    client_id: key.client_id,
    client_secret: key.client_secret,
    refresh_token: client.credentials.refresh_token,
  });
  await fs.writeFile(TOKEN_PATH, payload);
}

/**
 * Load or request or authorization to call APIs.
 *
 */
async function authorize() {
  let client = await loadSavedCredentialsIfExist();
  if (client) {
    return client;
  }
  client = await authenticate({
    scopes: SCOPES,
    keyfilePath: CREDENTIALS_PATH,
  });
  if (client.credentials) {
    await saveCredentials(client);
  }
  return client;
}

/**
 * Creates a new script project, upload a file, and log the script's URL.
 * @param {google.auth.OAuth2} auth An authorized OAuth2 client.
 */
async function callAppsScript(auth) {
  const script = google.script({version: 'v1', auth});
  let res = await script.projects.create({
    resource: {
      title: 'My Script',
    },
  });
  res = await script.projects.updateContent({
    scriptId: res.data.scriptId,
    auth,
    resource: {
      files: [
        {
          name: 'hello',
          type: 'SERVER_JS',
          source: 'function helloWorld() {\n  console.log("Hello, world!");\n}',
        },
        {
          name: 'appsscript',
          type: 'JSON',
          source:
            '{"timeZone":"America/New_York","exceptionLogging":' + '"CLOUD"}',
        },
      ],
    },
  });
  console.log(`https://script.google.com/d/${res.data.scriptId}/edit`);
}

authorize().then(callAppsScript).catch(console.error);
// [END apps_script_api_quickstart]