/**
 * Copyright 2020 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// @license © 2020 Google LLC. Licensed under the Apache License, Version 2.0.

const getFileWithHandle = async (handle) => {
  const file = await handle.getFile()
  file.handle = handle
  return file
}

/**
 * Opens a file from disk using the File System Access API.
 * @type { typeof import("../../index").fileOpen }
 */
export default async (options = [{}]) => {
  if (!Array.isArray(options)) {
    options = [options]
  }
  const types = []
  options.forEach((option, i) => {
    types[i] = {
      description: option.description || '',
      accept: {},
    }
    if (option.mimeTypes) {
      option.mimeTypes.map((mimeType) => {
        types[i].accept[mimeType] = option.extensions || []
      })
    } else {
      types[i].accept['*/*'] = option.extensions || []
    }
  })
  const handleOrHandles = await window.showOpenFilePicker({
    id: options[0].id,
    startIn: options[0].startIn,
    types,
    multiple: options[0].multiple || false,
    excludeAcceptAllOption: options[0].excludeAcceptAllOption || false,
  })
  const files = await Promise.all(handleOrHandles.map(getFileWithHandle))
  if (options[0].multiple) {
    return files
  }
  return files[0]
}