import assert from 'node:assert/strict'
import test from 'node:test'

import {
  pickSupportedVideoMimeType,
  resolveVideoDurationLimitError,
  resolveVideoTargetSize,
} from '../src/utils/video-compress.ts'

test('时长策略：超过上限直接拒绝（不自动裁剪）', () => {
  assert.equal(resolveVideoDurationLimitError(30, 30), '')
  assert.equal(resolveVideoDurationLimitError(29.4, 30), '')
  assert.match(resolveVideoDurationLimitError(31, 30), /不能超过 30 秒/)
  assert.match(resolveVideoDurationLimitError(30.6, 30), /不能超过 30 秒/)
})

test('时长策略：读不到时长也要拒绝，避免上传未知长度视频', () => {
  assert.match(resolveVideoDurationLimitError(0, 30), /无法读取视频时长/)
  assert.match(resolveVideoDurationLimitError(Number.NaN, 30), /无法读取视频时长/)
})

test('压缩尺寸：按目标高度等比缩放且宽高为偶数', () => {
  assert.deepEqual(resolveVideoTargetSize(1920, 1080, 720), { width: 1280, height: 720 })
  assert.deepEqual(resolveVideoTargetSize(1080, 1920, 720), { width: 404, height: 720 })
  // 原视频比目标更小：不放大
  assert.deepEqual(resolveVideoTargetSize(640, 360, 720), { width: 640, height: 360 })
  const odd = resolveVideoTargetSize(1081, 721, 720)
  assert.equal(odd.width % 2, 0)
  assert.equal(odd.height % 2, 0)
})

test('容器选择：优先 WebM(VP8)，其次 VP9/WebM，最后 MP4', () => {
  assert.equal(
    pickSupportedVideoMimeType((mime) => true),
    'video/webm;codecs=vp8,opus',
  )
  assert.equal(
    pickSupportedVideoMimeType((mime) => mime === 'video/webm' || mime.startsWith('video/mp4')),
    'video/webm',
  )
  assert.equal(
    pickSupportedVideoMimeType((mime) => mime.startsWith('video/mp4')),
    'video/mp4;codecs=avc1.42E01E,mp4a.40.2',
  )
  assert.equal(
    pickSupportedVideoMimeType(() => false),
    '',
  )
})