import test from 'brittle'
import { MetricsCollector } from '../server/services/collector.js'
import { CHART_BY_ID, getAllChartDefs } from '../shared/metrics.js'

test('collector emits core system charts', async (t) => {
  const c = new MetricsCollector({ intervalMs: 50 })
  /** @type {any[]} */
  let batch = []
  c.once('samples', (b) => {
    batch = b
  })
  c.start()
  await new Promise((r) => setTimeout(r, 80))
  c.stop()

  t.ok(batch.length > 5)
  const charts = new Set(batch.map((s) => s.chart))
  t.ok(charts.has('system.cpu'))
  t.ok(charts.has('system.ram') || charts.has('mem.available'))
  t.ok(charts.has('system.load'))
  t.ok(charts.has('system.uptime'))

  const cpu = batch.find((s) => s.chart === 'system.cpu')
  t.ok(cpu)
  for (const dim of ['user', 'system', 'idle', 'iowait', 'steal']) {
    t.ok(dim in cpu.values, dim)
  }

  // runtime instance charts should be registered after first tick
  t.ok(getAllChartDefs().length >= 30)
  t.ok(CHART_BY_ID.has('system.cpu'))
})