# frozen_string_literal: true

class ApplicationSetting < ApplicationRecord
  include CacheableAttributes
  include CacheMarkdownField
  include TokenAuthenticatable
  include ChronicDurationAttribute
  include IgnorableColumns
  include Sanitizable

  ignore_columns %i[elasticsearch_shards elasticsearch_replicas], remove_with: '14.4', remove_after: '2021-09-22'
  ignore_columns %i[static_objects_external_storage_auth_token], remove_with: '14.9', remove_after: '2022-03-22'
  ignore_column %i[max_package_files_for_package_destruction], remove_with: '14.9', remove_after: '2022-03-22'
  ignore_column :user_email_lookup_limit, remove_with: '15.0', remove_after: '2022-04-18'

  INSTANCE_REVIEW_MIN_USERS = 50
  GRAFANA_URL_ERROR_MESSAGE = 'Please check your Grafana URL setting in ' \
    'Admin Area > Settings > Metrics and profiling > Metrics - Grafana'

  KROKI_URL_ERROR_MESSAGE = 'Please check your Kroki URL setting in ' \
    'Admin Area > Settings > General > Kroki'

  enum whats_new_variant: { all_tiers: 0, current_tier: 1, disabled: 2 }, _prefix: true

  add_authentication_token_field :runners_registration_token, encrypted: -> { Feature.enabled?(:application_settings_tokens_optional_encryption) ? :optional : :required }
  add_authentication_token_field :health_check_access_token
  add_authentication_token_field :static_objects_external_storage_auth_token, encrypted: :required

  belongs_to :self_monitoring_project, class_name: "Project", foreign_key: 'instance_administration_project_id'
  belongs_to :push_rule
  alias_attribute :self_monitoring_project_id, :instance_administration_project_id

  belongs_to :instance_group, class_name: "Group", foreign_key: 'instance_administrators_group_id'
  alias_attribute :instance_group_id, :instance_administrators_group_id
  alias_attribute :instance_administrators_group, :instance_group

  sanitizes! :default_branch_name

  def self.kroki_formats_attributes
    {
      blockdiag: {
        label: 'BlockDiag (includes BlockDiag, SeqDiag, ActDiag, NwDiag, PacketDiag, and RackDiag)'
      },
      bpmn: {
        label: 'BPMN'
      },
      excalidraw: {
        label: 'Excalidraw'
      }
    }
  end

  store_accessor :kroki_formats, *ApplicationSetting.kroki_formats_attributes.keys, prefix: true

  # Include here so it can override methods from
  # `add_authentication_token_field`
  # We don't prepend for now because otherwise we'll need to
  # fix a lot of tests using allow_any_instance_of
  include ApplicationSettingImplementation

  serialize :restricted_visibility_levels # rubocop:disable Cop/ActiveRecordSerialize
  serialize :import_sources # rubocop:disable Cop/ActiveRecordSerialize
  serialize :disabled_oauth_sign_in_sources, Array # rubocop:disable Cop/ActiveRecordSerialize
  serialize :domain_allowlist, Array # rubocop:disable Cop/ActiveRecordSerialize
  serialize :domain_denylist, Array # rubocop:disable Cop/ActiveRecordSerialize
  serialize :repository_storages # rubocop:disable Cop/ActiveRecordSerialize

  # See https://gitlab.com/gitlab-org/gitlab/-/issues/300916
  serialize :asset_proxy_allowlist, Array # rubocop:disable Cop/ActiveRecordSerialize
  serialize :asset_proxy_whitelist, Array # rubocop:disable Cop/ActiveRecordSerialize

  cache_markdown_field :sign_in_text
  cache_markdown_field :help_page_text
  cache_markdown_field :shared_runners_text, pipeline: :plain_markdown
  cache_markdown_field :after_sign_up_text

  default_value_for :id, 1
  default_value_for :repository_storages_weighted, {}
  default_value_for :kroki_formats, {}

  chronic_duration_attr_writer :archive_builds_in_human_readable, :archive_builds_in_seconds

  chronic_duration_attr :runner_token_expiration_interval_human_readable, :runner_token_expiration_interval
  chronic_duration_attr :group_runner_token_expiration_interval_human_readable, :group_runner_token_expiration_interval
  chronic_duration_attr :project_runner_token_expiration_interval_human_readable, :project_runner_token_expiration_interval

  validates :grafana_url,
            system_hook_url: {
              blocked_message: "is blocked: %{exception_message}. " + GRAFANA_URL_ERROR_MESSAGE
            },
            if: :grafana_url_absolute?

  validate :validate_grafana_url

  validates :uuid, presence: true

  validates :outbound_local_requests_whitelist,
            length: { maximum: 1_000, message: N_('is too long (maximum is 1000 entries)') },
            allow_nil: false,
            qualified_domain_array: true

  validates :session_expire_delay,
            presence: true,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :minimum_password_length,
            presence: true,
            numericality: { only_integer: true,
                            greater_than_or_equal_to: DEFAULT_MINIMUM_PASSWORD_LENGTH,
                            less_than_or_equal_to: Devise.password_length.max }

  validates :home_page_url,
            allow_blank: true,
            addressable_url: true,
            if: :home_page_url_column_exists?

  validates :help_page_support_url,
            allow_blank: true,
            addressable_url: true,
            if: :help_page_support_url_column_exists?

  validates :help_page_documentation_base_url,
            length: { maximum: 255, message: _("is too long (maximum is %{count} characters)") },
            allow_blank: true,
            addressable_url: true

  validates :after_sign_out_path,
            allow_blank: true,
            addressable_url: true

  validates :abuse_notification_email,
            devise_email: true,
            allow_blank: true

  validates :two_factor_grace_period,
            numericality: { greater_than_or_equal_to: 0 }

  validates :recaptcha_site_key,
            presence: true,
            if: :recaptcha_or_login_protection_enabled

  validates :recaptcha_private_key,
            presence: true,
            if: :recaptcha_or_login_protection_enabled

  validates :akismet_api_key,
            presence: true,
            if: :akismet_enabled

  validates :spam_check_api_key,
            length: { maximum: 2000, message: _('is too long (maximum is %{count} characters)') },
            allow_blank: true

  validates :unique_ips_limit_per_user,
            numericality: { greater_than_or_equal_to: 1 },
            presence: true,
            if: :unique_ips_limit_enabled

  validates :unique_ips_limit_time_window,
            numericality: { greater_than_or_equal_to: 0 },
            presence: true,
            if: :unique_ips_limit_enabled

  validates :kroki_url,
            presence: { if: :kroki_enabled }

  validate :validate_kroki_url, if: :kroki_enabled

  validates :kroki_formats, json_schema: { filename: 'application_setting_kroki_formats' }

  validates :plantuml_url,
            presence: true,
            if: :plantuml_enabled

  validates :sourcegraph_url,
            presence: true,
            if: :sourcegraph_enabled

  validates :gitpod_url,
            presence: true,
            addressable_url: { enforce_sanitization: true },
            if: :gitpod_enabled

  validates :mailgun_signing_key,
            presence: true,
            length: { maximum: 255 },
            if: :mailgun_events_enabled

  validates :snowplow_collector_hostname,
            presence: true,
            hostname: true,
            if: :snowplow_enabled

  validates :max_attachment_size,
            presence: true,
            numericality: { only_integer: true, greater_than: 0 }

  validates :max_artifacts_size,
            presence: true,
            numericality: { only_integer: true, greater_than: 0 }

  validates :max_import_size,
            presence: true,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :max_pages_size,
            presence: true,
            numericality: { only_integer: true, greater_than_or_equal_to: 0,
                            less_than: ::Gitlab::Pages::MAX_SIZE / 1.megabyte }

  validates :jobs_per_stage_page_size,
            presence: true,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :default_artifacts_expire_in, presence: true, duration: true

  validates :container_expiration_policies_enable_historic_entries,
            inclusion: { in: [true, false], message: _('must be a boolean value') }

  validates :container_registry_token_expire_delay,
            presence: true,
            numericality: { only_integer: true, greater_than: 0 }

  validates :repository_storages, presence: true
  validate :check_repository_storages
  validate :check_repository_storages_weighted

  validates :auto_devops_domain,
            allow_blank: true,
            hostname: { allow_numeric_hostname: true, require_valid_tld: true },
            if: :auto_devops_enabled?

  validates :enabled_git_access_protocol,
            inclusion: { in: %w(ssh http), allow_blank: true }

  validates :domain_denylist,
            presence: { message: 'Domain denylist cannot be empty if denylist is enabled.' },
            if: :domain_denylist_enabled?

  validates :housekeeping_incremental_repack_period,
            presence: true,
            numericality: { only_integer: true, greater_than: 0 }

  validates :housekeeping_full_repack_period,
            presence: true,
            numericality: { only_integer: true, greater_than_or_equal_to: :housekeeping_incremental_repack_period }

  validates :housekeeping_gc_period,
            presence: true,
            numericality: { only_integer: true, greater_than_or_equal_to: :housekeeping_full_repack_period }

  validates :terminal_max_session_time,
            presence: true,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :polling_interval_multiplier,
            presence: true,
            numericality: { greater_than_or_equal_to: 0 }

  validates :gitaly_timeout_default,
            presence: true,
            if: :gitaly_timeout_default_changed?,
            numericality: {
              only_integer: true,
              greater_than_or_equal_to: 0,
              less_than_or_equal_to: Settings.gitlab.max_request_duration_seconds
            }

  validates :gitaly_timeout_medium,
            presence: true,
            if: :gitaly_timeout_medium_changed?,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }
  validates :gitaly_timeout_medium,
            numericality: { less_than_or_equal_to: :gitaly_timeout_default },
            if: :gitaly_timeout_default
  validates :gitaly_timeout_medium,
            numericality: { greater_than_or_equal_to: :gitaly_timeout_fast },
            if: :gitaly_timeout_fast

  validates :gitaly_timeout_fast,
            presence: true,
            if: :gitaly_timeout_fast_changed?,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }
  validates :gitaly_timeout_fast,
            numericality: { less_than_or_equal_to: :gitaly_timeout_default },
            if: :gitaly_timeout_default

  validates :diff_max_patch_bytes,
            presence: true,
            numericality: { only_integer: true,
                            greater_than_or_equal_to: Gitlab::Git::Diff::DEFAULT_MAX_PATCH_BYTES,
                            less_than_or_equal_to: Gitlab::Git::Diff::MAX_PATCH_BYTES_UPPER_BOUND }

  validates :diff_max_files,
            presence: true,
            numericality: { only_integer: true,
                            greater_than_or_equal_to: Commit::DEFAULT_MAX_DIFF_FILES_SETTING,
                            less_than_or_equal_to: Commit::MAX_DIFF_FILES_SETTING_UPPER_BOUND }

  validates :diff_max_lines,
            presence: true,
            numericality: { only_integer: true,
                            greater_than_or_equal_to: Commit::DEFAULT_MAX_DIFF_LINES_SETTING,
                            less_than_or_equal_to: Commit::MAX_DIFF_LINES_SETTING_UPPER_BOUND }

  validates :user_default_internal_regex, js_regex: true, allow_nil: true

  validates :personal_access_token_prefix,
            format: { with: %r{\A[a-zA-Z0-9_+=/@:.-]+\z},
                      message: _("can contain only letters of the Base64 alphabet (RFC4648) with the addition of '@', ':' and '.'") },
            length: { maximum: 20, message: _('is too long (maximum is %{count} characters)') },
            allow_blank: true

  validates :commit_email_hostname, format: { with: /\A[^@]+\z/ }

  validates :archive_builds_in_seconds,
            allow_nil: true,
            numericality: { only_integer: true, greater_than_or_equal_to: 1.day.seconds }

  validates :local_markdown_version,
            allow_nil: true,
            numericality: { only_integer: true, greater_than_or_equal_to: 0, less_than: 65536 }

  validates :asset_proxy_url,
            presence: true,
            allow_blank: false,
            url: true,
            if: :asset_proxy_enabled?

  validates :asset_proxy_secret_key,
            presence: true,
            allow_blank: false,
            if: :asset_proxy_enabled?

  validates :static_objects_external_storage_url,
            addressable_url: true, allow_blank: true

  validates :static_objects_external_storage_auth_token,
            presence: true,
            if: :static_objects_external_storage_url?

  validates :protected_paths,
            length: { maximum: 100, message: N_('is too long (maximum is 100 entries)') },
            allow_nil: false

  validates :push_event_hooks_limit,
            numericality: { greater_than_or_equal_to: 0 }

  validates :push_event_activities_limit,
            numericality: { greater_than_or_equal_to: 0 }

  validates :snippet_size_limit, numericality: { only_integer: true, greater_than: 0 }
  validates :wiki_page_max_content_bytes, numericality: { only_integer: true, greater_than_or_equal_to: 1.kilobytes }
  validates :max_yaml_size_bytes, numericality: { only_integer: true, greater_than: 0 }, presence: true
  validates :max_yaml_depth, numericality: { only_integer: true, greater_than: 0 }, presence: true

  validates :email_restrictions, untrusted_regexp: true

  validates :hashed_storage_enabled, inclusion: { in: [true], message: _("Hashed storage can't be disabled anymore for new projects") }

  validates :container_registry_delete_tags_service_timeout,
            :container_registry_cleanup_tags_service_max_list_size,
            :container_registry_expiration_policies_worker_capacity,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :container_registry_expiration_policies_caching,
            inclusion: { in: [true, false], message: _('must be a boolean value') }

  validates :container_registry_import_max_tags_count,
            :container_registry_import_max_retries,
            :container_registry_import_start_max_retries,
            :container_registry_import_max_step_duration,
            allow_nil: false,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :container_registry_import_target_plan, presence: true
  validates :container_registry_import_created_before, presence: true

  validates :dependency_proxy_ttl_group_policy_worker_capacity,
            allow_nil: false,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :packages_cleanup_package_file_worker_capacity,
            allow_nil: false,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :invisible_captcha_enabled,
            inclusion: { in: [true, false], message: _('must be a boolean value') }

  SUPPORTED_KEY_TYPES.each do |type|
    validates :"#{type}_key_restriction", presence: true, key_restriction: { type: type }
  end

  validates :allowed_key_types, presence: true

  validates_each :restricted_visibility_levels do |record, attr, value|
    value&.each do |level|
      unless Gitlab::VisibilityLevel.options.value?(level)
        record.errors.add(attr, _("'%{level}' is not a valid visibility level") % { level: level })
      end
    end
  end

  validates_each :import_sources do |record, attr, value|
    value&.each do |source|
      unless Gitlab::ImportSources.options.value?(source)
        record.errors.add(attr, _("'%{source}' is not a import source") % { source: source })
      end
    end
  end

  validate :check_valid_runner_registrars

  validate :terms_exist, if: :enforce_terms?

  validates :external_authorization_service_default_label,
            presence: true,
            if: :external_authorization_service_enabled

  validates :external_authorization_service_url,
            addressable_url: true, allow_blank: true,
            if: :external_authorization_service_enabled

  validates :external_authorization_service_timeout,
            numericality: { greater_than: 0, less_than_or_equal_to: 10 },
            if: :external_authorization_service_enabled

  validates :spam_check_endpoint_url,
            addressable_url: { schemes: %w(tls grpc) }, allow_blank: true

  validates :spam_check_endpoint_url,
            presence: true,
            if: :spam_check_endpoint_enabled

  validates :external_auth_client_key,
            presence: true,
            if: -> (setting) { setting.external_auth_client_cert.present? }

  validates :lets_encrypt_notification_email,
            devise_email: true,
            format: { without: /@example\.(com|org|net)\z/,
                      message: N_("Let's Encrypt does not accept emails on example.com") },
            allow_blank: true

  validates :lets_encrypt_notification_email,
            presence: true,
            if: :lets_encrypt_terms_of_service_accepted?

  validates :eks_integration_enabled,
            inclusion: { in: [true, false] }

  validates :eks_account_id,
            format: { with: Gitlab::Regex.aws_account_id_regex,
                      message: Gitlab::Regex.aws_account_id_message },
            if: :eks_integration_enabled?

  validates :eks_access_key_id,
            length: { in: 16..128 },
            if: -> (setting) { setting.eks_integration_enabled? && setting.eks_access_key_id.present? }

  validates :eks_secret_access_key,
            presence: true,
            if: -> (setting) { setting.eks_integration_enabled? && setting.eks_access_key_id.present? }

  validates_with X509CertificateCredentialsValidator,
                 certificate: :external_auth_client_cert,
                 pkey: :external_auth_client_key,
                 pass: :external_auth_client_key_pass,
                 if: -> (setting) { setting.external_auth_client_cert.present? }

  validates :default_ci_config_path,
    format: { without: %r{(\.{2}|\A/)},
              message: N_('cannot include leading slash or directory traversal.') },
    length: { maximum: 255 },
    allow_blank: true

  validates :issues_create_limit,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :raw_blob_request_limit,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :ci_jwt_signing_key,
            rsa_key: true, allow_nil: true

  validates :customers_dot_jwt_signing_key,
            rsa_key: true, allow_nil: true

  validates :rate_limiting_response_text,
            length: { maximum: 255, message: _('is too long (maximum is %{count} characters)') },
            allow_blank: true

  with_options(presence: true, numericality: { only_integer: true, greater_than: 0 }) do
    validates :throttle_unauthenticated_api_requests_per_period
    validates :throttle_unauthenticated_api_period_in_seconds
    validates :throttle_unauthenticated_requests_per_period
    validates :throttle_unauthenticated_period_in_seconds
    validates :throttle_unauthenticated_packages_api_requests_per_period
    validates :throttle_unauthenticated_packages_api_period_in_seconds
    validates :throttle_unauthenticated_files_api_requests_per_period
    validates :throttle_unauthenticated_files_api_period_in_seconds
    validates :throttle_unauthenticated_deprecated_api_requests_per_period
    validates :throttle_unauthenticated_deprecated_api_period_in_seconds
    validates :throttle_authenticated_api_requests_per_period
    validates :throttle_authenticated_api_period_in_seconds
    validates :throttle_authenticated_git_lfs_requests_per_period
    validates :throttle_authenticated_git_lfs_period_in_seconds
    validates :throttle_authenticated_web_requests_per_period
    validates :throttle_authenticated_web_period_in_seconds
    validates :throttle_authenticated_packages_api_requests_per_period
    validates :throttle_authenticated_packages_api_period_in_seconds
    validates :throttle_authenticated_files_api_requests_per_period
    validates :throttle_authenticated_files_api_period_in_seconds
    validates :throttle_authenticated_deprecated_api_requests_per_period
    validates :throttle_authenticated_deprecated_api_period_in_seconds
    validates :throttle_protected_paths_requests_per_period
    validates :throttle_protected_paths_period_in_seconds
  end

  validates :notes_create_limit,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :search_rate_limit,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :search_rate_limit_unauthenticated,
    numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :notes_create_limit_allowlist,
            length: { maximum: 100, message: N_('is too long (maximum is 100 entries)') },
            allow_nil: false

  validates :admin_mode,
            inclusion: { in: [true, false], message: _('must be a boolean value') }

  validates :external_pipeline_validation_service_url,
            addressable_url: true, allow_blank: true

  validates :external_pipeline_validation_service_timeout,
            allow_nil: true,
            numericality: { only_integer: true, greater_than: 0 }

  validates :whats_new_variant,
            inclusion: { in: ApplicationSetting.whats_new_variants.keys }

  validates :floc_enabled,
            inclusion: { in: [true, false], message: _('must be a boolean value') }

  enum sidekiq_job_limiter_mode: {
         Gitlab::SidekiqMiddleware::SizeLimiter::Validator::TRACK_MODE => 0,
         Gitlab::SidekiqMiddleware::SizeLimiter::Validator::COMPRESS_MODE => 1 # The default
       }

  validates :sidekiq_job_limiter_mode,
            inclusion: { in: self.sidekiq_job_limiter_modes }
  validates :sidekiq_job_limiter_compression_threshold_bytes,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }
  validates :sidekiq_job_limiter_limit_bytes,
            numericality: { only_integer: true, greater_than_or_equal_to: 0 }

  validates :sentry_enabled,
    inclusion: { in: [true, false], message: _('must be a boolean value') }
  validates :sentry_dsn,
    addressable_url: true, presence: true, length: { maximum: 255 },
    if: :sentry_enabled?
  validates :sentry_clientside_dsn,
    addressable_url: true, allow_blank: true, length: { maximum: 255 },
    if: :sentry_enabled?
  validates :sentry_environment,
    presence: true, length: { maximum: 255 },
    if: :sentry_enabled?

  validates :users_get_by_id_limit,
    numericality: { only_integer: true, greater_than_or_equal_to: 0 }
  validates :users_get_by_id_limit_allowlist,
          length: { maximum: 100, message: N_('is too long (maximum is 100 entries)') },
          allow_nil: false

  attr_encrypted :asset_proxy_secret_key,
                 mode: :per_attribute_iv,
                 key: Settings.attr_encrypted_db_key_base_truncated,
                 algorithm: 'aes-256-cbc',
                 insecure_mode: true

  private_class_method def self.encryption_options_base_32_aes_256_gcm
    {
      mode: :per_attribute_iv,
      key: Settings.attr_encrypted_db_key_base_32,
      algorithm: 'aes-256-gcm',
      encode: true
    }
  end

  attr_encrypted :external_auth_client_key, encryption_options_base_32_aes_256_gcm
  attr_encrypted :external_auth_client_key_pass, encryption_options_base_32_aes_256_gcm
  attr_encrypted :lets_encrypt_private_key, encryption_options_base_32_aes_256_gcm
  attr_encrypted :eks_secret_access_key, encryption_options_base_32_aes_256_gcm
  attr_encrypted :akismet_api_key, encryption_options_base_32_aes_256_gcm
  attr_encrypted :spam_check_api_key, encryption_options_base_32_aes_256_gcm.merge(encode: false)
  attr_encrypted :elasticsearch_aws_secret_access_key, encryption_options_base_32_aes_256_gcm
  attr_encrypted :elasticsearch_password, encryption_options_base_32_aes_256_gcm.merge(encode: false)
  attr_encrypted :recaptcha_private_key, encryption_options_base_32_aes_256_gcm
  attr_encrypted :recaptcha_site_key, encryption_options_base_32_aes_256_gcm
  attr_encrypted :slack_app_secret, encryption_options_base_32_aes_256_gcm
  attr_encrypted :slack_app_verification_token, encryption_options_base_32_aes_256_gcm
  attr_encrypted :ci_jwt_signing_key, encryption_options_base_32_aes_256_gcm
  attr_encrypted :customers_dot_jwt_signing_key, encryption_options_base_32_aes_256_gcm
  attr_encrypted :secret_detection_token_revocation_token, encryption_options_base_32_aes_256_gcm
  attr_encrypted :cloud_license_auth_token, encryption_options_base_32_aes_256_gcm
  attr_encrypted :external_pipeline_validation_service_token, encryption_options_base_32_aes_256_gcm
  attr_encrypted :mailgun_signing_key, encryption_options_base_32_aes_256_gcm.merge(encode: false)
  attr_encrypted :database_grafana_api_key, encryption_options_base_32_aes_256_gcm.merge(encode: false, encode_iv: false)

  validates :disable_feed_token,
            inclusion: { in: [true, false], message: _('must be a boolean value') }

  before_validation :ensure_uuid!
  before_validation :coerce_repository_storages_weighted, if: :repository_storages_weighted_changed?
  before_validation :normalize_default_branch_name

  before_save :ensure_runners_registration_token
  before_save :ensure_health_check_access_token

  after_commit do
    reset_memoized_terms
  end
  after_commit :expire_performance_bar_allowed_user_ids_cache, if: -> { previous_changes.key?('performance_bar_allowed_group_id') }

  def validate_grafana_url
    validate_url(parsed_grafana_url, :grafana_url, GRAFANA_URL_ERROR_MESSAGE)
  end

  def grafana_url_absolute?
    parsed_grafana_url&.absolute?
  end

  def validate_kroki_url
    validate_url(parsed_kroki_url, :kroki_url, KROKI_URL_ERROR_MESSAGE)
  end

  def kroki_url_absolute?
    parsed_kroki_url&.absolute?
  end

  def sourcegraph_url_is_com?
    !!(sourcegraph_url =~ %r{\Ahttps://(www\.)?sourcegraph\.com})
  end

  def normalize_default_branch_name
    self.default_branch_name = default_branch_name.presence
  end

  def instance_review_permitted?
    users_count = Rails.cache.fetch('limited_users_count', expires_in: 1.day) do
      ::User.limit(INSTANCE_REVIEW_MIN_USERS + 1).count(:all)
    end

    users_count >= INSTANCE_REVIEW_MIN_USERS
  end

  Recursion = Class.new(RuntimeError)

  def self.create_from_defaults
    # this is posssible if calls to create the record depend on application
    # settings themselves. This was seen in the case of a feature flag called by
    # `transaction` that ended up requiring application settings to determine metrics behavior.
    # If something like that happens, we break the loop here, and let the caller decide how to manage it.
    raise Recursion if Thread.current[:application_setting_create_from_defaults]

    Thread.current[:application_setting_create_from_defaults] = true

    check_schema!

    transaction(requires_new: true) do # rubocop:disable Performance/ActiveRecordSubtransactions
      super
    end
  rescue ActiveRecord::RecordNotUnique
    # We already have an ApplicationSetting record, so just return it.
    current_without_cache
  ensure
    Thread.current[:application_setting_create_from_defaults] = nil
  end

  def self.find_or_create_without_cache
    current_without_cache || create_from_defaults
  end

  # Due to the frequency with which settings are accessed, it is
  # likely that during a backup restore a running GitLab process
  # will insert a new `application_settings` row before the
  # constraints have been added to the table. This would add an
  # extra row with ID 1 and prevent the primary key constraint from
  # being added, which made ActiveRecord throw a
  # IrreversibleOrderError anytime the settings were accessed
  # (https://gitlab.com/gitlab-org/gitlab/-/issues/36405).  To
  # prevent this from happening, we do a sanity check that the
  # primary key constraint is present before inserting a new entry.
  def self.check_schema!
    return if connection.primary_key(self.table_name).present?

    raise "The `#{self.table_name}` table is missing a primary key constraint in the database schema"
  end

  # By default, the backend is Rails.cache, which uses
  # ActiveSupport::Cache::RedisStore. Since loading ApplicationSetting
  # can cause a significant amount of load on Redis, let's cache it in
  # memory.
  def self.cache_backend
    Gitlab::ProcessMemoryCache.cache_backend
  end

  def recaptcha_or_login_protection_enabled
    recaptcha_enabled || login_recaptcha_protection_enabled
  end

  kroki_formats_attributes.keys.each do |key|
    define_method :"kroki_formats_#{key}=" do |value|
      super(::Gitlab::Utils.to_boolean(value))
    end
  end

  def kroki_format_supported?(diagram_type)
    case diagram_type
    when 'excalidraw'
      return kroki_formats_excalidraw
    when 'bpmn'
      return kroki_formats_bpmn
    end

    return kroki_formats_blockdiag if ::Gitlab::Kroki::BLOCKDIAG_FORMATS.include?(diagram_type)

    ::AsciidoctorExtensions::Kroki::SUPPORTED_DIAGRAM_NAMES.include?(diagram_type)
  end

  private

  def parsed_grafana_url
    @parsed_grafana_url ||= Gitlab::Utils.parse_url(grafana_url)
  end

  def parsed_kroki_url
    @parsed_kroki_url ||= Gitlab::UrlBlocker.validate!(kroki_url, schemes: %w(http https), enforce_sanitization: true)[0]
  rescue Gitlab::UrlBlocker::BlockedUrlError => error
    self.errors.add(
      :kroki_url,
      "is not valid. #{error}"
    )
  end

  def validate_url(parsed_url, name, error_message)
    unless parsed_url
      self.errors.add(
        name,
        "must be a valid relative or absolute URL. #{error_message}"
      )
    end
  end
end

ApplicationSetting.prepend_mod_with('ApplicationSetting')
