# frozen_string_literal: true

require "rails_helper"

RSpec.describe Streams::NightCloudSweeper do
  def with_env(vars)
    previous = vars.keys.index_with { |k| ENV[k] }
    vars.each { |k, v| ENV[k] = v }
    yield
  ensure
    previous.each { |k, v| v.nil? ? ENV.delete(k) : ENV[k] = v }
  end

  def cloud_node!(slug: "ingest-cloud-01")
    StreamNode.create!(
      slug: slug,
      hostname: "#{slug}.mltv-stream.net",
      role: "cloud",
      status: "ready",
      provider: "hetzner",
      provider_instance_id: "42",
      rtmp_base_url: "rtmp://#{slug}:1935",
      hls_base_url: "https://#{slug}/hls",
      api_base_url: "http://10.0.0.9:9997",
      max_publishers: 6,
      max_relays: 6,
      metadata: { "public_ip" => "1.2.3.4" }
    )
  end

  before do
    StreamSession.where.not(stream_node_id: nil).update_all(stream_node_id: nil, status: "ended", ended_at: Time.current)
    StreamNode.where(role: "cloud").delete_all
  end

  it "skips outside quiet hours" do
    with_env(
      "STREAM_NIGHT_SWEEP_ENABLED" => "1",
      "STREAM_AUTOSCALE_QUIET_HOURS" => "02:00-07:00",
      "STREAM_AUTOSCALE_QUIET_TZ" => "Europe/Rome"
    ) do
      allow(Streams::QuietHours).to receive(:active?).and_return(false)
      cloud_node!
      result = described_class.sweep!
      expect(result.skipped).to eq(true)
      expect(StreamNode.where(role: "cloud").count).to eq(1)
    end
  end

  it "decommissions idle cloud nodes during quiet hours" do
    with_env("STREAM_NIGHT_SWEEP_ENABLED" => "1") do
      allow(Streams::QuietHours).to receive(:active?).and_return(true)
      node = cloud_node!
      provisioner = instance_double(Streams::NodeProvisioner)
      allow(provisioner).to receive(:drain!) do |n|
        n.update!(status: "draining")
        n
      end
      allow(provisioner).to receive(:decommission!) do |n|
        n.destroy!
        true
      end

      result = described_class.sweep!(provisioner: provisioner)
      expect(result.skipped).to eq(false)
      expect(result.actions).to include(:"decommission_#{node.slug}")
      expect(StreamNode.find_by(id: node.id)).to be_nil
    end
  end

  it "alerts and keeps nodes with active sessions" do
    with_env("STREAM_NIGHT_SWEEP_ENABLED" => "1") do
      allow(Streams::QuietHours).to receive(:active?).and_return(true)
      node = cloud_node!
      user = User.create!(email: "night@example.com", name: "N", password: "Password123", role: "coach")
      club = Club.create!(name: "Night", sport: "volleyball")
      team = club.teams.create!(name: "T", sport: "volleyball", slug: "night-t")
      match = team.matches.create!(opponent_name: "X", scheduled_at: 1.hour.from_now)
      StreamSession.create!(match: match, user: user, platform: "matchlivetv", status: "live", stream_node: node)

      allow(Ops::IncidentRecorder).to receive(:record)
      provisioner = instance_double(Streams::NodeProvisioner)
      expect(provisioner).not_to receive(:decommission!)

      result = described_class.sweep!(provisioner: provisioner)
      expect(result.actions).to include(:"alert_active_#{node.slug}")
      expect(Ops::IncidentRecorder).to have_received(:record).with(hash_including(
        fingerprint: "stream_overflow:night_active:#{node.slug}"
      ))
      expect(node.reload.status).to eq("ready")
    end
  end

  it "does not touch lab nodes" do
    with_env("STREAM_NIGHT_SWEEP_ENABLED" => "1") do
      allow(Streams::QuietHours).to receive(:active?).and_return(true)
      StreamNode.create!(
        slug: "ingest-lab-night-01",
        hostname: "lab-night.local",
        role: "lab",
        status: "ready",
        provider: "local",
        rtmp_base_url: "rtmp://lab:1935",
        hls_base_url: "https://lab/hls",
        api_base_url: "http://lab:9997",
        max_publishers: 2,
        max_relays: 2
      )
      result = described_class.sweep!
      expect(result.actions).to eq([])
      expect(StreamNode.find_by(slug: "ingest-lab-night-01")).to be_present
    end
  end
end