class User < ApplicationRecord
  attr_accessor :remember_token, :activation_token, :reset_token
  before_save :downcase_email
  before_create :create_activation_digest
  validates :name, presence: true,length: {maximum: 50}
  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  validates :email, presence: true,length: {maximum: 255},
                format: { with: VALID_EMAIL_REGEX },
                uniqueness: { case_sensitive: false }
  has_secure_password
  validates :password, presence: true, length: { minimum: 6},allow_nil: true

  def User.digest(string)
    cost = ActiveModel::SecurePassword.min_cost ? BCrypt::Engine::MIN_COST :
                                                  BCrypt::Engine.cost
    BCrypt::Password.create(string, cost: cost)
  end
  #ランダムなトークンを返す
  def User.new_token
    SecureRandom.urlsafe_base64
  end
  #永続セッションのためにユーザーをデータベースに記憶する
  def remember
    self.remember_token = User.new_token
    update_attribute(:remember_digest, User.digest(remember_token))
  end
  #渡されたトークンがダイジェストと一致したらtrurを返す
  def authenticated?(attribute,token)
    digest = send("#{attribute}_digest")
    return false if digest.nil?
    BCrypt::Password.new(digest).is_password?(token)
  end

  def forget
    update_attribute(:remember_digest,nil)
  end

  def activate
    update_columns(activated: true,activated_at: Time.zone.now)
  end

  def send_activation_email
    UserMailer.account_activation(self).deliver_now
  end

  def create_reset_digest
    self.reset_token = User.new_token
    update_columns(reset_digest: User.digest(reset_token),reset_sent_at: Time.zone.now)
    # update_attribute(:reset_sent_at, Time.zone.now)
  end

  def send_password_reset_email
    UserMailer.password_reset(self).deliver_now
  end

  def password_reset_expired?
    reset_sent_at < 2.hours.ago
  end

  private
  #メールアドレスを全て小文字にする
  def downcase_email
    self.email = email.downcase
  end
#有効化トークンとダイジェストを作成および代入する
  def create_activation_digest
    self.activation_token = User.new_token
    self.activation_digest = User.digest(activation_token)
  end


end
