const dangerousFileTypes = new Set([
  'exe',
  'dll',
  'bat',
  'cmd',
  'com',
  'scr',
  'msi',
  'pif',
  'js',
  'jsp',
  'jspx',
  'jse',
  'vbs',
  'vbe',
  'ps1',
  'psm1',
  'sh',
  'jar',
  'apk',
  'ipa',
  'lnk',
  'hta',
  'reg',
  'cpl',
  'msc',
  'wsf',
  'wsh',
  'scf',
  'inf',
  'url',
  'sh'
])
// ...所有支持的icon
const iconList = [
  'amb-color-icon-XLS',
  'amb-color-icon-XLSX',
  'amb-color-icon-DOC',
  'amb-color-icon-DOCX',
  'amb-color-icon-PPT',
  'amb-color-icon-PDF',
  'amb-color-icon-TXT',
  'amb-color-icon-JPG',
  'amb-color-icon-PNG',
  'amb-color-icon-ZIP',
  'amb-color-icon-AVI',
  'amb-color-icon-MP4',
  'amb-color-icon-qita'
]
export function formatFileSize(size: number | undefined | null): string {
  if (size == null || isNaN(size)) return ''
  if (size < 1024) return size + 'B'
  if (size < 1024 * 1024) return (size / 1024).toFixed(1).replace(/\.0$/, '') + 'K'
  if (size < 1024 * 1024 * 1024) return (size / 1024 / 1024).toFixed(1).replace(/\.0$/, '') + 'M'
  return (size / 1024 / 1024 / 1024).toFixed(1).replace(/\.0$/, '') + 'G'
}

// 列表_5215278368.xls
export function getFileIconByName(fileName: string): string {
  const qitaIcon = 'amb-color-icon-qita'
  if (!fileName) {
    return qitaIcon
  }
  let fileType = fileName.substring(fileName.lastIndexOf('.') + 1) // 获取文件名
  if (!fileType) {
    return qitaIcon
  }
  switch (fileType) {
    case 'xlsx':
      fileType = 'XLS'
      break
    case 'docx':
      fileType = 'DOC'
      break
    case 'pptx':
      fileType = 'PPT'
      break
  }
  const finalIconName = 'amb-color-icon-' + fileType.toUpperCase()
  if (iconList.includes(finalIconName)) {
    return finalIconName
  }
  return qitaIcon
}
/**
 * 校验是否是合法的文件名。不能包含 < >" '&|/ \`?*:
 */
export function isValidFileName(fileName: string): boolean {
  if (!fileName || !fileName.trim()) {
    return false
  }
  const invalidCharsPattern = /[<>:"'\/\\|?*&`]/
  return !invalidCharsPattern.test(fileName)
}

export function isMaliciousUploadFile(file: File) {
  const fileName = (file?.name || '').trim().toLowerCase()
  if (!fileName) {
    return false
  }

  return fileName.split('.').some((part) => dangerousFileTypes.has(part))
}

export const checkFileAccept = (file: File, acceptStr: string) => {
  if (!acceptStr || !file) return true
  const accepts = acceptStr.split(',').map((s) => s.trim())
  const fileExt = '.' + (file.name.split('.').pop()?.toLowerCase() || '')
  const fileType = file.type

  return accepts.some((item) => {
    // 扩展名匹配：".jpg"、".pdf"
    if (item.startsWith('.')) {
      return fileExt === item.toLowerCase()
    }
    // MIME 通配符匹配："image/*"、"video/*"
    if (item.endsWith('/*')) {
      const typePrefix = item.slice(0, -1) // 'image/', 'video/'
      return fileType.startsWith(typePrefix)
    }
    // 精确 MIME 匹配："image/png"、"application/pdf"
    return fileType === item
  })
}