'use strict';

const cron = require('cron');
const async = require('async');
const {exec} = require('child_process');
const UserModel = require('../models/user');
const signatureTool = require('../tools/signature-tool');


const debug = require('debug');
const error = debug('cc:cronjob:err');
const logger = debug('cc:cronjob');
logger.log = console.log.bind(console);

const createAllSignatures = () => {
  logger('\x1b[35m%s\x1b[0m', new Date().toLocaleString()
    + ': cron job started - UPDATE SIGNATURES');

  // mock response
  const res = {
    locals: {
      items: {},
    },
  };

  // re-create signature image for each active user
  UserModel.find({}, (err, users) => {
    async.eachSeries(users, (user, callback) => {
      // mock next to execute callback
      const next = (err) => {
        if (!err || (err && err.message.startsWith('Fraction not defined'))) {
          callback();
        } else {
          error('\x1b[41m%s\x1b[0m', new Date().toLocaleString()
            + ': Error in execution - UPDATE SIGNATURES: ' + err.message);
        }
      };
      signatureTool(user._id, res, next);
    }, () => {
      if (err) {
        error('\x1b[41m%s\x1b[0m', new Date().toLocaleString()
          + ': Error in execution - UPDATE SIGNATURES: ' + err.message);
      }
      logger('\x1b[35m%s\x1b[0m', new Date().toLocaleString()
        + ': finished successful - UPDATE SIGNATURES');
    });
  });
};

const createBackup = () => {
  logger('\x1b[35m%s\x1b[0m', new Date().toLocaleString()
    + ': cron job started - CREATE BACKUP');
  exec(__dirname + '/../../backup/backup.sh', (err, stdout, stderr) => {
    if (err) {
      error(err.message);
    }
    logger('\x1b[32m%s\x1b[0m', stderr);
    logger('\x1b[35m%s\x1b[0m', new Date().toLocaleString()
      + ': cron job finished - CREATE BACKUP');
  });
};

// Execute daily @ 02:30 AM
const cronJobSignature = cron.job('00 30 02 * * *', createAllSignatures);

// Execute on Mon, Thu and Sat @ 04:00 AM
const cronJobBackup = cron.job('00 00 04 * * mon,thu,sat', createBackup);

module.exports = {
  cronJobSignature: cronJobSignature,
  cronJobBackup: cronJobBackup,
  createAllSignatures: createAllSignatures,
};