#!/usr/bin/env node
/**
 * 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 {Registry} = require('../lib/utils/registry');
const fs = require('fs');
const protocolGenerator = require('./protocol-types-generator');
const {execSync} = require('child_process');

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, ffmpeg, firefox-beta.

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 ${SCRIPT_NAME} --help`);
    process.exit(1);
  }
  const browsersJSON = require(path.join(ROOT_PATH, 'browsers.json'));
  const browserName = args[0].toLowerCase();
  const descriptor = browsersJSON.browsers.find(b => b.name === browserName);
  if (!descriptor) {
    console.log(`Unknown browser "${browserName}"`);
    console.log(`Try running ${SCRIPT_NAME} --help`);
    process.exit(1);
  }
  const revision = args[1];
  console.log(`Rolling ${browserName} to ${revision}`);

  // 2. Update browsers.json.
  console.log('\nUpdating browsers.json...');
  descriptor.revision = String(revision);
  if (browserName === 'chromium')
    browsersJSON.browsers.find(b => b.name === 'chromium-with-symbols').revision = String(revision);
  fs.writeFileSync(path.join(ROOT_PATH, 'browsers.json'), JSON.stringify(browsersJSON, null, 2) + '\n');

  if (descriptor.installByDefault) {
    // 3. Download new browser.
    console.log('\nDownloading new browser...');
    const registry = new Registry(ROOT_PATH);
    await registry.install();

    // 4. Generate types.
    console.log('\nGenerating protocol types...');
    const executablePath = registry.findExecutable(browserName).executablePathOrDie();
    await protocolGenerator.generateProtocol(browserName, executablePath).catch(console.warn);

    // 5. Update docs.
    console.log('\nUpdating documentation...');
    try {
      process.stdout.write(execSync('npm run --silent doc'));
    } catch (e) {
    }
  }
  console.log(`\nRolled ${browserName} to ${revision}`);
})();