const test = require('node:test')
const assert = require('node:assert/strict')
const { validateRenderRequest, playbackRange } = require('./renderValidation.cjs')

function scene(overrides = {}) {
  return {
    canvas: { width: 640, height: 360 },
    duration: 2,
    fps: 30,
    layers: [
      {
        keyframes: [
          { time: 0, props: {} },
          { time: 1, props: {} },
        ],
      },
    ],
    assets: [],
    ...overrides,
  }
}

test('accepts a normal render request', () => {
  const result = validateRenderRequest(scene(), { fps: 30, crf: 18, preset: 'fast' })
  assert.equal(result.ok, true)
  assert.equal(result.options.totalFrames, 30)
})

test('rejects invalid dimensions', () => {
  const result = validateRenderRequest(scene({ canvas: { width: 0, height: 360 } }))
  assert.equal(result.ok, false)
  assert.match(result.error, /canvas/)
})

test('rejects invalid fps and frame count', () => {
  assert.equal(validateRenderRequest(scene(), { fps: 0 }).ok, false)
  assert.equal(validateRenderRequest(scene({ duration: 61 }), { fps: 60 }).ok, false)
})

test('rejects invalid duration', () => {
  const result = validateRenderRequest(scene({ duration: 0 }))
  assert.equal(result.ok, false)
  assert.match(result.error, /duration/)
})

test('rejects too many layers and keyframes', () => {
  const layers = Array.from({ length: 501 }, () => ({ keyframes: [] }))
  assert.equal(validateRenderRequest(scene({ layers })).ok, false)

  const keyframes = Array.from({ length: 5001 }, (_, i) => ({ time: i / 60, props: {} }))
  assert.equal(validateRenderRequest(scene({ layers: [{ keyframes }] })).ok, false)
})

test('rejects invalid crf and preset', () => {
  assert.equal(validateRenderRequest(scene(), { crf: 52 }).ok, false)
  assert.equal(validateRenderRequest(scene(), { preset: 'turbo' }).ok, false)
})

test('computes playback range from in/out or last keyframe', () => {
  assert.deepEqual(playbackRange(scene({ inTime: 0.25, outTime: 1.5 })), { start: 0.25, end: 1.5 })
  assert.deepEqual(playbackRange(scene()), { start: 0, end: 1 })
})