module Katello
  module Concerns
    module SubscriptionFacetHostExtensions
      extend ActiveSupport::Concern

      # This module depends on #value_to_sql which is defined in ScopedSearchExtensions
      # make sure this dependency is met.
      include ::ScopedSearchExtensions

      included do
        audited :associations => [:pools]

        accepts_nested_attributes_for :subscription_facet, :update_only => true, :reject_if => lambda { |attrs| attrs.values.compact.empty? }

        has_many :activation_keys, :through => :subscription_facet
        has_many :pools, :through => :subscription_facet
        has_many :purpose_addons, :through => :subscription_facet
        has_many :subscriptions, :through => :pools
        has_one :rhel_lifecycle_status_object, :class_name => 'Katello::RhelLifecycleStatus', :foreign_key => 'host_id', :dependent => :destroy
        has_one :hypervisor_host, :through => :subscription_facet

        scoped_search on: :status, relation: :rhel_lifecycle_status_object, rename: :rhel_lifecycle_status, complete_value: rhel_lifecycle_status_map

        scoped_search :on => :release_version, :relation => :subscription_facet, :complete_value => true, :only_explicit => true
        scoped_search :on => :autoheal, :relation => :subscription_facet, :complete_value => true, :only_explicit => true
        scoped_search :on => :service_level, :relation => :subscription_facet, :complete_value => true, :only_explicit => true
        scoped_search :on => :last_checkin, :relation => :subscription_facet, :complete_value => true, :only_explicit => true
        scoped_search :on => :registered_through, :relation => :subscription_facet, :complete_value => true, :only_explicit => true
        scoped_search :on => :registered_at, :relation => :subscription_facet, :rename => :registered_at, :only_explicit => true
        scoped_search :on => :uuid, :relation => :subscription_facet, :rename => :subscription_uuid, :only_explicit => true
        scoped_search :relation => :activation_keys, :on => :name, :rename => :activation_key, :complete_value => true, :ext_method => :find_by_activation_key
        scoped_search :relation => :activation_keys, :on => :id, :rename => :activation_key_id, :complete_value => true, :ext_method => :find_by_activation_key_id,
                      :only_explicit => true, :validator => ScopedSearch::Validators::INTEGER
        scoped_search :on => :hypervisor, :relation => :subscription_facet, :complete_value => true
        scoped_search :on => :name, :relation => :hypervisor_host, :complete_value => true, :rename => :hypervisor_host, :ext_method => :find_by_hypervisor_host
        scoped_search :on => :name, :relation => :subscriptions, :rename => :subscription_name, :complete_value => true, :ext_method => :find_by_subscription_name
        scoped_search :on => :id, :relation => :pools, :rename => :subscription_id, :complete_value => true, :ext_method => :find_by_subscription_id, :only_explicit => true
        scoped_search :on => :purpose_role, :rename => :role, :relation => :subscription_facet, :complete_value => true
        scoped_search :on => :purpose_usage, :rename => :usage, :relation => :subscription_facet, :complete_value => true
        scoped_search :on => :name, :rename => :addon, :relation => :purpose_addons, :complete_value => true, :ext_method => :find_by_purpose_addon
        before_update :update_candlepin_associations, if: -> { subscription_facet.try(:backend_update_needed?) }
      end

      def update_candlepin_associations(consumer_params = nil)
        content_facet.cves_changed = false if content_facet
        content_facet&.save!

        auto_attach_enabled_via_checkin = consumer_params.try(:[], 'autoheal')

        if subscription_facet
          consumer_params ||= subscription_facet.consumer_attributes

          host_uuid = consumer_params.dig(:facts, 'dmi.system.uuid')
          if ::Katello::Host::SubscriptionFacet.override_dmi_uuid?(host_uuid)
            # if host reported a dmi uuid to treat as a duplicate, override it with the stored host param
            override_value = subscription_facet.dmi_uuid_override&.value
            override_value ||= subscription_facet.update_dmi_uuid_override&.value
            consumer_params[:facts]['dmi.system.uuid'] = override_value
          end
          ::Katello::Resources::Candlepin::Consumer.update(subscription_facet.uuid, consumer_params)

          if auto_attach_enabled_via_checkin
            ::Katello::Resources::Candlepin::Consumer.refresh_entitlements(subscription_facet.uuid)
          end

          if consumer_params.try(:[], :facts)
            ::Katello::Host::SubscriptionFacet.update_facts(self, consumer_params[:facts])
          end

          unless consumer_params.blank?
            subscription_facet.update_from_consumer_attributes(consumer_params)
            subscription_facet.save!
          end
        end
      end

      module ClassMethods
        def rhel_lifecycle_status_map
          ::Katello::RhelLifecycleStatus.status_map
        end

        def find_by_purpose_addon(_key, operator, value)
          conditions = sanitize_sql_for_conditions(["#{Katello::PurposeAddon.table_name}.name #{operator} ?", value_to_sql(operator, value)])
          hosts = ::Host::Managed.joins(:purpose_addons).where(conditions)
          return_hosts(hosts)
        end

        def find_by_activation_key(_key, operator, value)
          conditions = sanitize_sql_for_conditions(["#{Katello::ActivationKey.table_name}.name #{operator} ?", value_to_sql(operator, value)])
          hosts = ::Host::Managed.joins(:activation_keys).where(conditions)
          return_hosts(hosts)
        end

        def find_by_activation_key_id(_key, operator, value)
          conditions = sanitize_sql_for_conditions(["#{Katello::ActivationKey.table_name}.id #{operator} ?", value_to_sql(operator, value)])
          hosts = ::Host::Managed.joins(:activation_keys).where(conditions)
          return_hosts(hosts)
        end

        def find_by_hypervisor_host(_key, operator, value)
          conditions = sanitize_sql_for_conditions(["#{::Host.table_name}.name #{operator} ?", value_to_sql(operator, value)])
          hosts = ::Host.where(conditions)
          hosts = ::Host.joins(:subscription_facet).where("#{Katello::Host::SubscriptionFacet.table_name}.hypervisor_host_id" => hosts)
          return_hosts(hosts)
        end

        def find_by_subscription_name(_key, operator, value)
          conditions = sanitize_sql_for_conditions(["#{Katello::Subscription.table_name}.name #{operator} ?", value_to_sql(operator, value)])
          sub_facets = ::Katello::Host::SubscriptionFacet.joins(pools: :subscription).where(conditions)
          host_ids = sub_facets.select(:host_id)
          return_hosts_by_id(host_ids)
        end

        def find_by_subscription_id(_key, operator, value)
          conditions = sanitize_sql_for_conditions(["#{Katello::Pool.table_name}.id #{operator} ?", value_to_sql(operator, value)])
          sub_facets = ::Katello::Host::SubscriptionFacet.joins(:pools).where(conditions)
          host_ids = sub_facets.select(:host_id)
          return_hosts_by_id(host_ids)
        end

        def return_hosts_by_id(host_ids)
          if host_ids.empty?
            {:conditions => "1=0"}
          else
            {:conditions => "#{::Host::Managed.table_name}.id IN (#{host_ids.to_sql})"}
          end
        end

        def return_hosts(hosts)
          if hosts.empty?
            {:conditions => "1=0"}
          else
            {:conditions => "#{::Host::Managed.table_name}.id IN (#{hosts.pluck(:id).join(',')})"}
          end
        end
      end
    end
  end
end