# frozen_string_literal: true

module Admin
  class StreamNodesController < Admin::BaseController
    def index
      Streams::NodeRegistry.ensure_home_from_env!
      @nodes = StreamNode.order(:role, :slug)
      @dns_provider = ENV.fetch("STREAM_DNS_PROVIDER", "lab")
      @cloud_provider = ENV.fetch("STREAM_CLOUD_PROVIDER", "local_lab")
      @lab_hosts = lab_dns_snippet
      @hetzner_configured = ENV["HCLOUD_TOKEN"].present?
      @autoscale_metrics = Streams::Autoscaler.metrics
    end

    def create
      kind = params[:kind].to_s
      node =
        if kind == "cloud"
          Streams::NodeProvisioner.new.provision_cloud!
        else
          Streams::NodeProvisioner.new.provision_lab!
        end
      redirect_to admin_stream_nodes_path,
                  notice: t("admin.flash.stream_node_created", slug: node.slug)
    rescue Streams::NodeProvisioner::Error, Streams::CloudProviders::Error, Streams::DnsProviders::Error,
           KeyError => e
      redirect_to admin_stream_nodes_path, alert: e.message
    end

    def drain
      node = StreamNode.find(params[:id])
      Streams::NodeProvisioner.new.drain!(node)
      redirect_to admin_stream_nodes_path, notice: t("admin.flash.stream_node_draining", slug: node.slug)
    rescue Streams::NodeProvisioner::Error => e
      redirect_to admin_stream_nodes_path, alert: e.message
    end

    def destroy
      node = StreamNode.find(params[:id])
      Streams::NodeProvisioner.new.decommission!(node)
      redirect_to admin_stream_nodes_path, notice: t("admin.flash.stream_node_destroyed", slug: node.slug)
    rescue Streams::NodeProvisioner::BusyError, Streams::NodeProvisioner::Error,
           Streams::CloudProviders::Error, Streams::DnsProviders::Error => e
      redirect_to admin_stream_nodes_path, alert: e.message
    end

    private

    def lab_dns_snippet
      return "" unless @dns_provider == "lab"

      Streams::DnsProviders::Lab.new.hosts_file_snippet
    rescue Redis::BaseError
      ""
    end
  end
end