class User < ApplicationRecord
	has_many :songs #set song user relations
  	attr_accessor :login #attr_accessor can login with username and email

  # Include default devise modules. Others available are:
 	devise :database_authenticatable, :registerable,
	    :recoverable, :rememberable, :trackable, :validatable, :confirmable,
	    :authentication_keys => [:login]
  #Facebook Login Authentcation devise module
	devise :omniauthable, :omniauth_providers => [:facebook]

  validates :avatar, presence: true

	   def self.find_for_database_authentication(warden_conditions)
      conditions = warden_conditions.dup
      if login = conditions.delete(:login)
        where(conditions.to_h).where(["lower(username) = :value OR lower(email) = :value", { :value => login.downcase }]).first
      elsif conditions.has_key?(:username) || conditions.has_key?(:email)
        where(conditions.to_h).first
      end
    end

    validates :username,
  	:presence => true,
  	:uniqueness => {
    	:case_sensitive => false
  	}
    #validate username
  	validates_format_of :username, with: /^[a-zA-Z0-9_\.]*$/, :multiline => true

    #Add avatar attachment file for paperclip, offer 2 styles
  	 has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "100x100#" }, :default_url => "/images/:style/missing.png"
	 validates_attachment_content_type :avatar, :content_type => /\Aimage\/.*\Z/


   #Facebook Auth handler
	  def facebook
    @user = User.from_omniauth(request.env["omniauth.auth"])

    if @user.persisted?
      sign_in_and_redirect @user, :event => :authentication #this will throw if @user is not activated
      set_flash_message(:notice, :success, :kind => "Facebook") if is_navigational_format?
    else
      session["devise.facebook_data"] = request.env["omniauth.auth"]
      redirect_to new_user_registration_url
    end
  end

  def failure
    redirect_to root_path
  end

  def self.from_omniauth(auth)
  where(provider: auth.provider, uid: auth.uid).first_or_create do |user|
    user.email = auth.info.email
    user.username = auth.info.name
    user.password = Devise.friendly_token[0,20]
    #user.name = auth.info.name   # assuming the user model has a name
    #user.image = auth.info.image # assuming the user model has an image
    # If you are using confirmable and the provider(s) you use validate emails,
    # uncomment the line below to skip the confirmation emails.
    # user.skip_confirmation!
  	end
  end



  def self.new_with_session(params, session)
    super.tap do |user|
      if data = session["devise.facebook_data"] && session["devise.facebook_data"]["extra"]["raw_info"]
        user.email = data["email"] if user.email.blank?
      end
    end
  end

end