/* Copy to Clipboard */
export async function copyToClipboard() {
  const toast = useToast()

  const selection = window.getSelection()

  const container = document.createElement('div')
  const range = selection?.getRangeAt(0)
  container.appendChild(range.cloneContents())

  const htmlOutput = container.innerHTML
  const textOutput = selection?.toString()

  try {
    // Modern Clipboard API requires ClipboardItem
    const clipboardItem = new ClipboardItem({
      'text/html': new Blob([htmlOutput], { type: 'text/html' }),
      'text/plain': new Blob([textOutput], { type: 'text/plain' })
    })

    await navigator.clipboard.write([clipboardItem])

    window.getSelection()?.removeAllRanges()

    toast.add({
      title: 'Texto copiado!',
      description: `${textOutput}`,
      icon: 'ph-clipboard-text',
      color: type == 'activities' ? 'success' : 'info'
    })
  } catch (err) {
    console.error('Failed to copy: ', err)
  }
}

/* Function to copy url with search parameters into clipboard */
export function copyParagraphToUrl(id: string) {
  console.log('Encoding id', id)

  const highlights = {
    highlights: [
      {
        id: id,
        color: '#f90'
      }
    ]
  }

  const blob = encodeObjectToBase64Url(highlights)

  console.log('Encoded highlights', blob)

  console.log('Decoded highlights object', base64UrlDecode(blob))
}

/* Encode JS object to base64Url compatible string */
function encodeObjectToBase64Url(obj: object) {
  // 1. Convert object to JSON string
  const jsonString = JSON.stringify(obj)

  // 2. Base64 encode the JSON string
  const base64 = btoa(jsonString)

  // 3. Make it URL-safe and remove padding
  return base64
    .replace(/\+/g, '-')
    .replace(/\//g, '_')
    .replace(/=+$/, '')
}

/* Decode base64URL String to json object */
function base64UrlDecode(base64Url: string) {
  // Replace URL-safe characters and add padding
  let base64 = base64Url.replace(/-/g, '+').replace(/_/g, '/');
  while (base64.length % 4 !== 0) {
    base64 += '='
  }
  return decodeURIComponent(atob(base64).split('').map(function (c) {
    return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2)
  }).join(''))
}