# frozen_string_literal: true
# rubocop:disable Style/Documentation

module Gitlab
  module BackgroundMigration
    class UpdateExistingUsersThatRequireTwoFactorAuth # rubocop:disable Metrics/ClassLength
      def perform(start_id, stop_id)
        ActiveRecord::Base.connection.execute <<~SQL
          UPDATE
            users
          SET
            require_two_factor_authentication_from_group = FALSE
          WHERE
            users.id BETWEEN #{start_id}
            AND #{stop_id}
            AND users.require_two_factor_authentication_from_group = TRUE
            AND users.id NOT IN ( SELECT DISTINCT
                users_groups_query.user_id
              FROM (
                SELECT
                  users.id AS user_id,
                  members.source_id AS group_ids
                FROM
                  users
                LEFT JOIN members ON members.source_type = 'Namespace'
                  AND members.requested_at IS NULL
                  AND members.user_id = users.id
                  AND members.type = 'GroupMember'
              WHERE
                users.require_two_factor_authentication_from_group = TRUE
                AND users.id BETWEEN #{start_id}
                AND #{stop_id}) AS users_groups_query
              INNER JOIN LATERAL ( WITH RECURSIVE "base_and_ancestors" AS (
          (
                    SELECT
                      "namespaces"."type",
                      "namespaces"."id",
                      "namespaces"."parent_id",
                      "namespaces"."require_two_factor_authentication"
                    FROM
                      "namespaces"
                    WHERE
                      "namespaces"."type" = 'Group'
                      AND "namespaces"."id" = users_groups_query.group_ids)
                  UNION (
                    SELECT
                      "namespaces"."type",
                      "namespaces"."id",
                      "namespaces"."parent_id",
                      "namespaces"."require_two_factor_authentication"
                    FROM
                      "namespaces",
                      "base_and_ancestors"
                    WHERE
                      "namespaces"."type" = 'Group'
                      AND "namespaces"."id" = "base_and_ancestors"."parent_id")),
                  "base_and_descendants" AS (
          (
                      SELECT
                        "namespaces"."type",
                        "namespaces"."id",
                        "namespaces"."parent_id",
                        "namespaces"."require_two_factor_authentication"
                      FROM
                        "namespaces"
                      WHERE
                        "namespaces"."type" = 'Group'
                        AND "namespaces"."id" = users_groups_query.group_ids)
                    UNION (
                      SELECT
                        "namespaces"."type",
                        "namespaces"."id",
                        "namespaces"."parent_id",
                        "namespaces"."require_two_factor_authentication"
                      FROM
                        "namespaces",
                        "base_and_descendants"
                      WHERE
                        "namespaces"."type" = 'Group'
                        AND "namespaces"."parent_id" = "base_and_descendants"."id"))
                    SELECT
                      "namespaces".*
                    FROM ((
                        SELECT
                          "namespaces"."type",
                          "namespaces"."id",
                          "namespaces"."parent_id",
                          "namespaces"."require_two_factor_authentication"
                        FROM
                          "base_and_ancestors" AS "namespaces"
                        WHERE
                          "namespaces"."type" = 'Group')
                      UNION (
                        SELECT
                          "namespaces"."type",
                          "namespaces"."id",
                          "namespaces"."parent_id",
                          "namespaces"."require_two_factor_authentication"
                        FROM
                          "base_and_descendants" AS "namespaces"
                        WHERE
                          "namespaces"."type" = 'Group')) namespaces
                    WHERE
                      "namespaces"."type" = 'Group'
                      AND "namespaces"."require_two_factor_authentication" = TRUE) AS hierarchy_tree ON TRUE);
        SQL
      end
    end
  end
end