import { graphql } from 'react-apollo'
import gql from 'graphql-tag'
import uploadsQuery from '../queries/uploads'

const UploadFileList = ({ mutate }) => {
  const handleChange = ({ target: { validity, files } }) =>
    validity.valid &&
    mutate({
      variables: { files },
      update: (proxy, { data: { multipleUpload } }) => {
        const data = proxy.readQuery({ query: uploadsQuery })
        data.uploads.push(...multipleUpload)
        proxy.writeQuery({ query: uploadsQuery, data })
      }
    })

  return <input type="file" multiple required onChange={handleChange} />
}

export default graphql(gql`
  mutation($files: [Upload!]!) {
    multipleUpload(files: $files) {
      id
      filename
      encoding
      mimetype
      path
    }
  }
`)(UploadFileList)