/**
 * Copyright 2017 Google Inc. All rights reserved.
 * Modifications copyright (c) Microsoft Corporation.
 *
 * 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.
 */

const path = require('path');
const fs = require('fs');
const protocolGenerator = require('./protocol-types-generator');

const SCRIPT_NAME = path.basename(__filename);
const ROOT_PATH = path.resolve(path.join(__dirname, '..'));

function usage() {
  return `
usage: ${SCRIPT_NAME} <browser> <revision>

Roll the <browser> to a specific <revision> and generate new protocol.
Supported browsers: chromium, firefox, webkit.

Example:
  ${SCRIPT_NAME} chromium 123456
`;
}

(async () => {
  // 1. Parse CLI arguments
  const args = process.argv.slice(2);
  if (args.some(arg => arg === '--help')) {
    console.log(usage());
    process.exit(1);
  } else if (args.length < 1) {
    console.log(`Please specify the browser name, e.g. 'chromium'.`);
    console.log(`Try running ${SCRIPT_NAME} --help`);
    process.exit(1);
  } else if (args.length < 2) {
    console.log(`Please specify the revision`);
    console.log(`Try running ${SCRIPT_NAME} --help`);
    process.exit(1);
  }
  const browserName = args[0].toLowerCase();
  if (!['chromium', 'firefox', 'webkit'].includes(browserName)) {
    console.log(`Unknown browser "${browserName}"`);
    console.log(`Try running ${SCRIPT_NAME} --help`);
    process.exit(1);
  }
  const revision = args[1];

  // 2. Update browsers.json.
  const browsersJSON = require(path.join(ROOT_PATH, 'browsers.json'));
  browsersJSON.browsers.find(b => b.name === browserName).revision = String(revision);
  fs.writeFileSync(path.join(ROOT_PATH, 'browsers.json'), JSON.stringify(browsersJSON, null, 2) + '\n');

  // 3. Download new browser.
  const { installBrowsersWithProgressBar } = require('../lib/install/installer');
  await installBrowsersWithProgressBar(ROOT_PATH);

  // 4. Generate types.
  const browser = { name: browserName, revision };
  const browserPaths = require('../lib/install/browserPaths');
  const browserDir = browserPaths.browserDirectory(browserPaths.browsersPath(ROOT_PATH), browser);
  const executablePath = browserPaths.executablePath(browserDir, browser);
  await protocolGenerator.generateProtocol(browserName, executablePath).catch(console.warn);
})();