// grab the things we need
var mongoose = require("mongoose");
var bcrypt = require("bcryptjs");
let SALT_WORK_FACTOR = 10;
var userSchema = new mongoose.Schema({
  username: { type: String, required: true, unique: true },
  password: { type: String, required: true }
});

userSchema.pre("save", function(next) {
  var user = this;

  if (!user.isModified("password")) return next();


  bcrypt.genSalt(SALT_WORK_FACTOR, function(err, salt) {
    if (err) return next(err);

    bcrypt.hash(user.password, salt, function(err, hash) {
      if (err) return next(err);


      user.password = hash;
      next();
    });
  });
});

userSchema.methods.comparePassword = function(candidatePassword, cb) {
  bcrypt.compare(candidatePassword, this.password, function(err, isMatch) {
    if (err) return cb(err);
    cb(null, isMatch);
  });
};

var User = mongoose.model("User", userSchema);


module.exports = User;