# frozen_string_literal: true

# Mantiene el registro de relaciones entre sitios e instancias
class InstanceModeration < ApplicationRecord
  include AASM

  belongs_to :site
  belongs_to :instance, class_name: 'ActivityPub::Instance'

  # Traer todas las instancias bloqueables, según la máquina de estados,
  # todas las que no estén bloqueadas ya.
  scope :may_block, -> { where.not(aasm_state: 'blocked') }
  scope :may_pause, -> { where.not(aasm_state: 'paused') }
  scope :paused, -> { where(aasm_state: 'paused') }
  scope :blocked, -> { where(aasm_state: 'blocked') }
  scope :allowed, -> { where(aasm_state: 'allowed') }

  # Bloquear instancias en masa
  def self.block_all!
    self.may_block.update_all(aasm_state: 'blocked', updated_at: Time.now)
  end

  # Pausar instancias en masa
  def self.pause_all!
    self.may_pause.update_all(aasm_state: 'paused', updated_at: Time.now)
  end

  aasm do
    state :paused, initial: true
    state :allowed
    state :blocked

    event :pause do
      transitions from: %i[allowed blocked], to: :paused

      before do
        pause_remotely!
      end
    end

    event :allow do
      transitions from: %i[paused blocked], to: :allowed

      before do
        allow_remotely!
      end
    end

    event :block do
      transitions from: %i[paused allowed], to: :blocked

      before do
        block_remotely!
      end
    end
  end

  # Elimina la instancia de todas las listas
  #
  # @return [Boolean]
  def pause_remotely!
    raise AASM::InvalidTransition unless
      site.social_inbox.blocklist.delete(list: [instance.list_name]).ok? &&
      site.social_inbox.allowlist.delete(list: [instance.list_name]).ok?
  end

  # Deja de permitir la instancia
  #
  # @return [Boolean]
  def block_remotely!
    raise AASM::InvalidTransition unless
      site.social_inbox.allowlist.delete(list: [instance.list_name]).ok? &&
      site.social_inbox.blocklist.post(list: [instance.list_name]).ok?
  end

  # Permite la instancia
  #
  # @return [Boolean]
  def allow_remotely!
    raise AASM::InvalidTransition unless
      site.social_inbox.blocklist.delete(list: [instance.list_name]).ok? &&
      site.social_inbox.allowlist.post(list: [instance.list_name]).ok?
  end
end