class SupportSubscription < ApplicationRecord
  belongs_to :support_thread
  belongs_to :user

  scope :optin, ->{ where(subscription_type: :optin) }
  scope :optout, ->{ where(subscription_type: :optout) }

  validates :subscription_type, presence: true, inclusion: { in: %w{ optin optout } }
  validates :user_id, uniqueness: { scope: :support_thread_id }

  def toggle!
    case subscription_type
    when "optin"
      update(subscription_type: "optout")
    when "optout"
      update(subscription_type: "optin")
    end
  end
end