import * as ImagePicker from 'expo-image-picker'

import Toast from '../components/Toast'

// 定义图片项类型

type PickerBaseParams = Omit<
  ImagePicker.ImagePickerOptions,
  'mediaTypes' | 'allowsMultipleSelection' | 'selectionLimit'
> & {
  maxImages?: number
  type?: ImagePicker.MediaTypeOptions
}

type PickerUriParams = PickerBaseParams & {
  resultType?: 'uri'
}

type PickerAssetParams = PickerBaseParams & {
  resultType: 'asset'
}
export async function imgPicker(params: PickerUriParams | PickerAssetParams) {
  const { maxImages = 1, type = ImagePicker.MediaTypeOptions.Images, resultType = 'uri', ...reset } = params

  const isMultiple = maxImages > 1

  const { status } = await ImagePicker.requestMediaLibraryPermissionsAsync()
  if (status !== 'granted') {
    Toast?.show({ title: '请开启相册权限' })
    throw new Error('请开启相册权限')
  }

  const result = await ImagePicker.launchImageLibraryAsync({
    mediaTypes: type,
    // allowsEditing: true,
    quality: 0.9,
    allowsMultipleSelection: isMultiple,
    selectionLimit: maxImages,
    ...reset,
  })

  if (result.canceled || !result.assets?.length) {
    throw new Error('未选择任何图片')
  }

  if (resultType === 'uri') {
    return result.assets.map((a) => a.uri)
  }

  return result.assets
}