import { stat } from 'node:fs/promises'
import { build } from 'esbuild'

const bundled = await build({
  bundle: true,
  entryPoints: ['src/core/particleResources.ts'],
  format: 'esm',
  platform: 'node',
  write: false,
})
const module = await import(
  `data:text/javascript;base64,${Buffer.from(bundled.outputFiles[0].text).toString('base64')}`
)

const expectedNames = Array.from(
  { length: 15 },
  (_, index) => `yanhua_${String(index + 1).padStart(2, '0')}.png`,
)
if (module.DEFAULT_SEQUENCE_FPS !== 15) {
  throw new Error('默认序列帧播放帧率必须为 15 FPS')
}
if (JSON.stringify(module.DEFAULT_SEQUENCE_FRAME_NAMES) !== JSON.stringify(expectedNames)) {
  throw new Error('默认序列帧顺序不正确')
}

const resource = {
  imageMode: 'sequence',
  sequenceFrames: [],
  textureName: 'star',
  textureFolder: '',
  previewUrl: '/images/star.png',
}
if (!module.ensureDefaultSequenceFrames(resource)) {
  throw new Error('序列帧模式应自动填充默认资源')
}
if (resource.sequenceFrames.length !== expectedNames.length) {
  throw new Error('默认序列帧数量不正确')
}
if (resource.textureName !== 'yanhua' || resource.textureFolder !== '') {
  throw new Error('默认序列帧资源名称或子文件夹不正确')
}

for (const [index, frame] of resource.sequenceFrames.entries()) {
  const expectedName = expectedNames[index]
  if (frame.name !== expectedName || !frame.previewUrl.endsWith(`/yanhua/${expectedName}`)) {
    throw new Error(`默认序列帧路径错误: ${frame.name}`)
  }
  await stat(`public/images/frame-sequence/yanhua/${expectedName}`)
}

const existingFrames = [{ name: 'custom.png', previewUrl: '/custom.png', texture: null }]
const customResource = {
  imageMode: 'sequence',
  sequenceFrames: existingFrames,
  textureName: 'custom',
  textureFolder: 'custom/',
  previewUrl: '/custom.png',
}
if (module.ensureDefaultSequenceFrames(customResource)) {
  throw new Error('已有自定义序列帧时不应被默认资源覆盖')
}
if (customResource.sequenceFrames !== existingFrames) {
  throw new Error('已有自定义序列帧引用不应变化')
}

const fixedResource = {
  imageMode: 'fixed',
  sequenceFrames: [],
  textureName: 'star',
  textureFolder: '',
  previewUrl: '/images/star.png',
}
if (module.ensureDefaultSequenceFrames(fixedResource)) {
  throw new Error('固定图片模式不应填充序列帧')
}

const playbackResource = {
  imageMode: 'sequence',
  sequencePlayback: 'loop-forward',
  sequenceStart: 'random',
  sequenceFps: 10,
  sequenceFrames: Array.from({ length: 4 }, (_, index) => ({ name: `${index}.png`, previewUrl: '', texture: null })),
}
const fixedStart = module.imageSequenceStartOffset({ ...playbackResource, sequenceStart: 'first' }, 42, 7)
if (fixedStart !== 0) throw new Error('固定首帧不应产生随机偏移')
const randomStart = module.imageSequenceStartOffset(playbackResource, 42, 7)
if (randomStart !== module.imageSequenceStartOffset(playbackResource, 42, 7) || randomStart < 0 || randomStart >= 4) {
  throw new Error('随机起始帧必须确定且位于序列范围内')
}
const variants = new Set(Array.from({ length: 32 }, (_, spawnId) => module.imageSequenceStartOffset(playbackResource, 42, spawnId)))
if (variants.size < 2) throw new Error('随机起始帧未在不同粒子间产生变化')
if (module.imageFrameState(playbackResource, 0).index !== 0) throw new Error('固定首帧应从第 0 帧开始')
if (module.imageFrameState(playbackResource, 0, 3).index !== 3) throw new Error('正向播放应从随机偏移帧开始')
const reverseResource = { ...playbackResource, sequencePlayback: 'loop-reverse' }
if (module.imageFrameState(reverseResource, 0, 3).index !== 0) throw new Error('反向播放应从随机偏移帧反向开始')
const onceResource = { ...playbackResource, sequencePlayback: 'once-hide' }
if (module.imageFrameState(onceResource, 0.3, 2).visible) throw new Error('单次隐藏应按偏移后的时长结束')

console.log('默认序列帧校验通过：15 FPS、yanhua 顺序、资源路径、固定/随机起始帧与四种播放方式')