import { test } from 'node:test'
import assert from 'node:assert/strict'
import './test-support.mjs'
const { RenderCadence } = await import('../src/renderCadence.ts')

test('settled scenes stop drawing and input or async completion wakes a frame', () => {
  const cadence = new RenderCadence()
  assert.deepEqual(cadence.nextFrame(0, false), { intervalMs: undefined })
  for (let time = 16; time <= 1600; time += 16) assert.equal(cadence.nextFrame(time, false), null)
  cadence.invalidate()
  assert.deepEqual(cadence.nextFrame(1616, false), { intervalMs: undefined })
  assert.equal(cadence.nextFrame(1632, false), null)
})

test('continuous motion samples frame intervals, excluding idle and visibility gaps', () => {
  const cadence = new RenderCadence()
  cadence.nextFrame(0, true)
  assert.deepEqual(cadence.nextFrame(50, true), { intervalMs: 50 })
  assert.deepEqual(cadence.nextFrame(133, true), { intervalMs: 83 })
  assert.equal(cadence.nextFrame(150, false), null)
  assert.deepEqual(cadence.nextFrame(5000, true), { intervalMs: undefined })
  assert.deepEqual(cadence.nextFrame(5016, true), { intervalMs: 16 })
  cadence.resetSampling()
  assert.deepEqual(cadence.nextFrame(9000, true), { intervalMs: undefined })
})