require 'active_model'
require 'active_support'

# :nodoc: namespace
module Authpwn

# :nodoc: namespace
module UserExtensions

# Augments the User model with a password virtual attribute.
module PasswordField
  extend ActiveSupport::Concern

  included do
    validates :password, length: { minimum: 1, on: :create, allow_nil: true },
                         confirmation: { allow_nil: true }
  end

  module ClassMethods
    # The user who has a certain e-mail, or nil if the e-mail is unclaimed.
    def with_email(email)
      credential = Credentials::Email.where(name: email).includes(:user).first
      credential && credential.user
    end
  end

  # Credentials::Password instance associated with this user.
  def password_credential
    credentials.find { |c| c.instance_of?(Credentials::Password) }
  end

  # The password from the user's Password credential, or nil.
  #
  # Returns nil if this user has no Password credential.
  def password
    credential = self.password_credential
    credential && credential.password
  end

  # The password_confirmation from the user's Password credential, or nil.
  #
  # Returns nil if this user has no Password credential.
  def password_confirmation
    credential = self.password_credential
    credential && credential.password_confirmation
  end

  # Sets the password on the user's Password credential.
  #
  # Creates a new Credentials::Password instance if necessary.
  def password=(new_password)
    if credential = self.password_credential
      credential.password = new_password
    else
      credentials << Credentials::Password.new(password: new_password)
    end
    new_password
  end

  # Sets the password on the user's Password credential.
  #
  # Creates a new Credentials::Password instance if necessary.
  def password_confirmation=(new_password_confirmation)
    if credential = self.password_credential
      credential.password_confirmation = new_password_confirmation
    else
      credentials << Credentials::Password.new(password_confirmation:
                                               new_password_confirmation)
    end
    new_password_confirmation
  end
end  # module Authpwn::UserExtensions::PasswordField

end  # module Authpwn::UserExtensions

end  # module Authpwn