function toLower(v) {
    return v.toLowerCase();
  }
  const mongoose = require('mongoose');
  //const assert = require('assert'); 
  mongoose.Promise = global.Promise;
 

  const contactSchema = mongoose.Schema({
    fname: { type: String, set: toLower},
    lname: { type: String, set: toLower },
    phone: { type: String, set: toLower },
    email: { type: String, set: toLower }
  });

  const Contact = mongoose.model('Contact', contactSchema);

  const addContact = (contact) => {
    Contact.create(contact, (err) => {
      assert.equal(null, err);
      console.info('New contact added');
      db.disconnect();
    });
  };

  const getContact = (name) => {
    // Define search criteria
    const search = new RegExp(name, 'i');
  
    Contact.find({$or: [{fname: search }, {lname: search }]})
    .exec((err, contact) => {
      assert.equal(null, err);
      console.info(contact);
      console.info(`${contact.length} matches`);
      db.disconnect();
    });
  };
  
  

  //exports.toLower = lower
  module.exports = {  addContact, getContact };