export const TAOXI_MAIN_VIDEO_TYPE = '淘系-主图视频'
export const TAOXI_GUANGGUANG_VIDEO_TYPE = '淘系-逛逛视频'
export const DOUYIN_QIANCHUAN_VIDEO_TYPE = '抖音-千川素材'
export const DOUYIN_ACCOUNT_MAINTENANCE_VIDEO_TYPE = '抖音-账号维护'
export const INSTALL_VIDEO_TYPE = '安装视频'
export const LIVE_CLIP_VIDEO_TYPE = '直播切片'

const MATERIAL_TYPE_ALIASES: Record<string, string> = {
  主图视频: TAOXI_MAIN_VIDEO_TYPE,
  种草视频: TAOXI_GUANGGUANG_VIDEO_TYPE,
}

export const CANONICAL_VIDEO_MATERIAL_TYPES = [
  TAOXI_MAIN_VIDEO_TYPE,
  INSTALL_VIDEO_TYPE,
  TAOXI_GUANGGUANG_VIDEO_TYPE,
  DOUYIN_QIANCHUAN_VIDEO_TYPE,
  DOUYIN_ACCOUNT_MAINTENANCE_VIDEO_TYPE,
  LIVE_CLIP_VIDEO_TYPE,
] as const

export const LEGACY_COMPATIBLE_VIDEO_MATERIAL_TYPES = [
  '视频',
  'VIDEO',
  ...CANONICAL_VIDEO_MATERIAL_TYPES,
  ...Object.keys(MATERIAL_TYPE_ALIASES),
] as const

export function normalizeVideoMaterialType(materialType?: string | null): string {
  const trimmed = (materialType || '').trim()
  if (!trimmed) {
    return ''
  }

  return MATERIAL_TYPE_ALIASES[trimmed] || trimmed
}

export function getCompatibleVideoMaterialTypes(materialType?: string | null): string[] {
  const trimmed = (materialType || '').trim()
  if (!trimmed) {
    return []
  }

  const normalized = normalizeVideoMaterialType(trimmed)
  const candidates = new Set<string>([trimmed, normalized])

  for (const [legacyType, canonicalType] of Object.entries(MATERIAL_TYPE_ALIASES)) {
    if (canonicalType === normalized) {
      candidates.add(legacyType)
    }
  }

  return Array.from(candidates)
}

export function isVideoMaterialType(materialType?: string | null): boolean {
  const normalized = normalizeVideoMaterialType(materialType)
  return LEGACY_COMPATIBLE_VIDEO_MATERIAL_TYPES.includes(
    normalized as (typeof LEGACY_COMPATIBLE_VIDEO_MATERIAL_TYPES)[number],
  )
}

export function isVideoTranscodeInFlight(status?: string | null): boolean {
  const normalized = String(status || '').trim().toLowerCase()
  return normalized === 'pending' || normalized === 'processing'
}

/**
 * 轮询只依赖可公开返回的素材类型和处理状态，不能依赖 videoSourceUrl。
 * 15 天访问策略会有意隐藏源视频地址，但后台封面生成状态仍需正常刷新。
 */
export function shouldPollVideoTranscode(
  materialType?: string | null,
  status?: string | null,
): boolean {
  return isVideoMaterialType(materialType) && isVideoTranscodeInFlight(status)
}

export function isBatchVideoMaterialType(materialType?: string | null): boolean {
  return normalizeVideoMaterialType(materialType) === TAOXI_GUANGGUANG_VIDEO_TYPE
}

export function isSingleVideoUploadMaterialType(materialType?: string | null): boolean {
  const normalized = normalizeVideoMaterialType(materialType)
  return (
    isVideoMaterialType(normalized) &&
    normalized !== TAOXI_GUANGGUANG_VIDEO_TYPE &&
    normalized !== '视频' &&
    normalized !== 'VIDEO'
  )
}