class MailIdentity < ApplicationRecord
  include Auditable

  encrypts :smtp_password

  require "openssl"

  has_many :mailings, dependent: :restrict_with_exception

  ENCRYPTIONS = Catalog::MAIL_ENCRYPTIONS.keys.freeze

  validates :name, :from_name, :from_email, :smtp_host, :smtp_port, presence: true
  validates :from_email, format: { with: URI::MailTo::EMAIL_REGEXP }
  validates :reply_to, format: { with: URI::MailTo::EMAIL_REGEXP }, allow_blank: true
  validates :smtp_port, numericality: { in: 1..65535 }
  validates :encryption, inclusion: { in: ENCRYPTIONS }
  validates :smtp_authentication, inclusion: { in: Catalog::MAIL_AUTH_METHODS.keys }
  validate :encryption_matches_port

  scope :active, -> { where(active: true) }
  scope :ordered, -> { order(:name) }

  def from_header
    %(#{from_name} <#{from_email}>)
  end

  def smtp_settings
    settings = {
      address: smtp_host,
      port: smtp_port,
      enable_starttls_auto: encryption == "starttls",
      ssl: encryption == "tls",
      openssl_verify_mode: verify_ssl? ? OpenSSL::SSL::VERIFY_PEER : OpenSSL::SSL::VERIFY_NONE
    }
    if smtp_username.present?
      settings[:user_name] = smtp_username
      settings[:password] = smtp_password
      settings[:authentication] = smtp_authentication.to_sym
    end
    settings
  end

  private

  def encryption_matches_port
    return if smtp_port.blank? || encryption.blank?

    if encryption == "tls" && smtp_port == 587
      errors.add(:smtp_port, "con SSL/TLS va usata la porta 465 (es. smtps.aruba.it)")
    elsif encryption == "starttls" && smtp_port == 465
      errors.add(:smtp_port, "con STARTTLS va usata la porta 587 (es. smtp.aruba.it)")
    end
  end
end