/*
 * This is a repair tool. It extracts all datas of a pad, removes and inserts them again.
 */

console.warn('WARNING: This script must not be used while etherpad is running!');

if (process.argv.length != 3) {
  console.error('Use: node bin/repairPad.js $PADID');
  process.exit(1);
}

// get the padID
const padId = process.argv[2];

const npm = require('../src/node_modules/npm');
npm.load({}, async (er) => {
  if (er) {
    console.error(`Could not load NPM: ${er}`);
    process.exit(1);
  }

  try {
    // intialize database
    const settings = require('../src/node/utils/Settings');
    const db = require('../src/node/db/DB');
    await db.init();

    // get the pad
    const padManager = require('../src/node/db/PadManager');
    const pad = await padManager.getPad(padId);

    // accumulate the required keys
    const neededDBValues = [`pad:${padId}`];

    // add all authors
    neededDBValues.push(...pad.getAllAuthors().map((author) => 'globalAuthor:'));

    // add all revisions
    for (let rev = 0; rev <= pad.head; ++rev) {
      neededDBValues.push(`pad:${padId}:revs:${rev}`);
    }

    // add all chat values
    for (let chat = 0; chat <= pad.chatHead; ++chat) {
      neededDBValues.push(`pad:${padId}:chat:${chat}`);
    }

    //
    // NB: this script doesn't actually does what's documented
    //     since the `value` fields in the following `.forEach`
    //     block are just the array index numbers
    //
    //     the script therefore craps out now before it can do
    //     any damage.
    //
    //     See gitlab issue #3545
    //
    console.info('aborting [gitlab #3545]');
    process.exit(1);

    // now fetch and reinsert every key
    neededDBValues.forEach((key, value) => {
      console.log(`Key: ${key}, value: ${value}`);
      db.remove(key);
      db.set(key, value);
    });

    console.info('finished');
    process.exit(0);
  } catch (er) {
    if (er.name === 'apierror') {
      console.error(er);
    } else {
      console.trace(er);
    }
  }
});