ukazap/permisi

# frozen_string_literal: true

module Permisi
  class Config
    class InvalidCacheStore < StandardError; end

    NULL_CACHE_STORE = ActiveSupport::Cache::NullStore.new

    attr_reader :permissions, :default_permissions
    attr_accessor :mute_pre_0_1_4_warning

    def initialize
      @permissions = ::HashWithIndifferentAccess.new
      @default_permissions = ::HashWithIndifferentAccess.new
    end

    def backend=(chosen_backend)
      chosen_backend = "::Permisi::Backend::#{chosen_backend.to_s.classify}".constantize if chosen_backend.is_a? Symbol

      if !mute_pre_0_1_4_warning && chosen_backend == Backend::ActiveRecord
        warn <<~MESSAGE

          WARNING: If you are upgrading from Permisi <v0.1.4, please create the following migration:
          `add_index :permisi_actor_roles, [:actor_id, :role_id], unique: true`

        MESSAGE
      end

      @backend = chosen_backend
    rescue NameError
      raise Backend::InvalidBackend
    end

    def backend
      @backend || Backend::NullBackend
    end

    def permissions=(permissions_hash)
      permissions_hash = HashWithIndifferentAccess.new(permissions_hash)
      @default_permissions = PermissionUtil.transform_namespace(permissions_hash)
      @permissions = permissions_hash
    end

    def cache_store=(cache_store)
      raise InvalidCacheStore unless cache_store.respond_to?(:fetch)

      @cache_store = cache_store
    end

    def cache_store
      @cache_store || NULL_CACHE_STORE
    end
  end
end