export function determineFileType(inputString: string): 'file' | 'folder' {
  if (inputString.includes('.') && !inputString.endsWith('.')) {
    return 'file'
  } else {
    return 'folder'
  }
}

export function formatSize(size: number) {
  if (size === 0) return 'empty'
  for (const unit of [null, 'kB', 'MB', 'GB', 'TB', 'PB', 'EB']) {
    if (size < 1e4)
      return (
        size.toLocaleString().replace(',', '\u202F') + (unit ? `\u202F${unit}` : '')
      )
    size = Math.round(size / 1000)
  }
  return 'huge'
}

export function formatUnixDate(t: number) {
  const date = new Date(t * 1000)
  const now = new Date()
  const diff = date.getTime() - now.getTime()
  const formatter = new Intl.RelativeTimeFormat('en', { numeric: 'auto' })
  if (Math.abs(diff) <= 5000) {
    return 'now'
  }
  if (Math.abs(diff) <= 60000) {
    return formatter.format(Math.round(diff / 1000), 'second')
  }

  if (Math.abs(diff) <= 3600000) {
    return formatter.format(Math.round(diff / 60000), 'minute')
  }

  if (Math.abs(diff) <= 86400000) {
    return formatter.format(Math.round(diff / 3600000), 'hour')
  }

  if (Math.abs(diff) <= 604800000) {
    return formatter.format(Math.round(diff / 86400000), 'day')
  }

  const d = date.toLocaleDateString("us", {
    weekday: 'short',
    year: 'numeric',
    month: 'short',
    day: 'numeric'
  }).replace("Sept", "Sep")
  return (d.length === 16 ? d : d.replace(', ', ',\u202F\u2007')).replaceAll(' ', '\u202F')
}

export function getFileExtension(filename: string) {
  const parts = filename.split('.')
  if (parts.length > 1) {
    return parts[parts.length - 1]
  } else {
    return '' // No hay extensión
  }
}
export function getFileType(extension: string): string {
  const videoExtensions = ['mp4', 'avi', 'mkv', 'mov']
  const imageExtensions = ['jpg', 'jpeg', 'png', 'gif']
  const pdfExtensions = ['pdf']

  if (videoExtensions.includes(extension)) {
    return 'video'
  } else if (imageExtensions.includes(extension)) {
    return 'image'
  } else if (pdfExtensions.includes(extension)) {
    return 'pdf'
  } else {
    return 'unknown'
  }
}

const collator = new Intl.Collator('en', { sensitivity: 'base', numeric: true, usage: 'search' })

export function haystackFormat(str: string) {
  const based = str.normalize('NFKD').replace(/[\u0300-\u036f]/g, '').toLowerCase()
  return '^' + based + '$'
}

export function localeIncludes(haystack: string, based: string, words: string[]) {
  return haystack.includes(based) || words && words.every(word => haystack.includes(word))
}

export function buildCorpus(data: any[]) {
  return data.map(item => [haystackFormat(item.name), item])
}

export function search(corpus: [string, any][], search: string) {
  const based = search.normalize('NFKD').replace(/[\u0300-\u036f]/g, '').toLowerCase()
  const words = based.split(/\W+/)
  const ret = []
  for (const [haystack, item] of corpus) {
    if (localeIncludes(haystack, based, words))
      ret.push(item)
  }
  return ret
}