export function isAbortError(error) {
  return error && error.name === 'AbortError'
}

export function isSavePickerSupported() {
  return typeof window !== 'undefined' && typeof window.showSaveFilePicker === 'function'
}

export function isOpenPickerSupported() {
  return typeof window !== 'undefined' && typeof window.showOpenFilePicker === 'function'
}

function downloadBlob(blob, filename) {
  const url = URL.createObjectURL(blob)
  const link = document.createElement('a')
  link.href = url
  link.download = filename
  document.body.appendChild(link)
  link.click()
  document.body.removeChild(link)
  URL.revokeObjectURL(url)
}

export async function saveBlob(blob, filename, types) {
  if (isSavePickerSupported()) {
    const handle = await window.showSaveFilePicker({
      suggestedName: filename,
      types
    })
    const writable = await handle.createWritable()
    await writable.write(blob)
    await writable.close()
    return { method: 'picker' }
  }

  downloadBlob(blob, filename)
  return { method: 'download' }
}

export async function openJsonFile() {
  if (!isOpenPickerSupported()) return null

  const handles = await window.showOpenFilePicker({
    multiple: false,
    types: [
      {
        description: 'JSON 配置文件',
        accept: {
          'application/json': ['.json']
        }
      }
    ]
  })

  if (!handles.length) return null
  return handles[0].getFile()
}

export async function openExcelFile() {
  if (!isOpenPickerSupported()) return null

  const handles = await window.showOpenFilePicker({
    multiple: false,
    types: [
      {
        description: 'Excel 工作簿',
        accept: {
          'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet': ['.xlsx'],
          'application/vnd.ms-excel': ['.xls']
        }
      }
    ]
  })

  if (!handles.length) return null
  return handles[0].getFile()
}