#!/usr/bin/env node

/**
 * Module dependencies.
 */

const program = require('commander');
const mongoose = require('../services/mongoose');
const util = require('./util');
const databaseVerifications = require('./verifications/database');

// Register the shutdown criteria.
util.onshutdown([
  () => mongoose.disconnect()
]);

async function database({fix = false, limit = Infinity, batch = 1000}) {
  try {
    for (const verification of databaseVerifications) {
      await verification({fix, limit, batch});
    }
  } catch (err) {
    console.error(`Failed to process all the ${databaseVerifications.length} verifications`, err);
    util.shutdown(1);
    return;
  }

  util.shutdown();
}

//==============================================================================
// Setting up the program command line arguments.
//==============================================================================

program
  .command('db')
  .description('verifies the database integrity')
  .option('-f, --fix', 'fix the problems found with database inconsistencies')
  .option('-l, --limit [size]', 'limit the amount of documents to process in a single pass, this will ensure only a maximum number of batch operations are issued [default: inf]', parseInt)
  .option('-b, --batch [size]', 'batch size to process verifications and repairs of documents [default: 1000]', parseInt)
  .action(database);

program.parse(process.argv);

// If there is no command listed, output help.
if (!process.argv.slice(2).length) {
  program.outputHelp();
  util.shutdown();
}