# frozen_string_literal: true

require 'openssl'

module Clusters
  module Applications
    # DEPRECATED: This model represents the Helm 2 Tiller server.
    # It is being kept around to enable the cleanup of the unused Tiller server.
    class Helm < ApplicationRecord
      self.table_name = 'clusters_applications_helm'

      attr_encrypted :ca_key,
        mode: :per_attribute_iv,
        key: Settings.attr_encrypted_db_key_base_truncated,
        algorithm: 'aes-256-cbc'

      include ::Clusters::Concerns::ApplicationCore
      include ::Clusters::Concerns::ApplicationStatus
      include ::Gitlab::Utils::StrongMemoize

      default_value_for :version, Gitlab::Kubernetes::Helm::V2::BaseCommand::HELM_VERSION

      before_create :create_keys_and_certs

      def issue_client_cert
        ca_cert_obj.issue
      end

      def set_initial_status
        # The legacy Tiller server is not installable, which is the initial status of every app
      end

      # DEPRECATED: This command is only for development and testing purposes, to simulate
      # a Helm 2 cluster with an existing Tiller server.
      def install_command
        Gitlab::Kubernetes::Helm::V2::InitCommand.new(
          name: name,
          files: files,
          rbac: cluster.platform_kubernetes_rbac?
        )
      end

      def uninstall_command
        Gitlab::Kubernetes::Helm::V2::ResetCommand.new(
          name: name,
          files: files,
          rbac: cluster.platform_kubernetes_rbac?
        )
      end

      def has_ssl?
        ca_key.present? && ca_cert.present?
      end

      private

      def files
        {
          'ca.pem': ca_cert,
          'cert.pem': tiller_cert.cert_string,
          'key.pem': tiller_cert.key_string
        }
      end

      def create_keys_and_certs
        ca_cert = Gitlab::Kubernetes::Helm::V2::Certificate.generate_root
        self.ca_key = ca_cert.key_string
        self.ca_cert = ca_cert.cert_string
      end

      def tiller_cert
        @tiller_cert ||= ca_cert_obj.issue(expires_in: Gitlab::Kubernetes::Helm::V2::Certificate::INFINITE_EXPIRY)
      end

      def ca_cert_obj
        return unless has_ssl?

        Gitlab::Kubernetes::Helm::V2::Certificate
          .from_strings(ca_key, ca_cert)
      end
    end
  end
end