import React, { useContext, useState } from 'react'
import { useQuery } from '@apollo/client'
import { JournalContext } from '../../xpub-journal/src'
import queries from './queries'
import { Container, Placeholder, VisualAbstract } from './style'


import {
  Spinner,
  SectionHeader,
  Title,
  SectionRow,
  SectionContent,
  Heading,
  HeadingWithAction,
  Pagination,
} from '../../shared'


const Frontpage = ({ history, ...props }) => {

  const [sortName, setSortName] = useState('created')
  const [sortDirection, setSortDirection] = useState('DESC')
  const [page, setPage] = useState(1)
  const limit = 2
  const sort = sortName && sortDirection && `${sortName}_${sortDirection}`
    

  const { loading, data, error } = useQuery(queries.frontpage, {
    variables: {
      sort,
      offset: (page - 1) * limit,
      limit,
    },
    fetchPolicy: 'network-only',
  })
  
  const journal = useContext(JournalContext)

  if (loading) return <Spinner />
  if (error) return JSON.stringify(error)

  const totalCount = data.publishedManuscripts.totalCount

  const frontpage  = (data.publishedManuscripts?.manuscripts || []).map(m => {
    const visualAbstract = m.files?.find(f => f.fileType === 'visualAbstract')
    return {
      ...m,
      visualAbstract: visualAbstract?.url,
      submission: JSON.parse(m.submission),
    }
  })

 

  return (
    <Container>
      <HeadingWithAction>
        <Heading>Recent publications in {journal.metadata.name}</Heading>
      </HeadingWithAction>
      <Pagination
          limit={limit}
          page={page}
          setPage={setPage}
          totalCount={totalCount}
          />

      {frontpage.length > 0 ? (
        frontpage.map(manuscript => (
          <SectionContent>
            <SectionHeader>
              <Title>{manuscript.meta.title}</Title>
            </SectionHeader>
            <SectionRow key={`manuscript-${manuscript.id}`}>

              {manuscript.submission?.abstract ? 
              <p>Abstract: {manuscript.submission?.abstract}</p>
              :  <br/> }
              {manuscript.visualAbstract ? 
              <p>
                Visual abstract:{' '}
                <VisualAbstract
                  alt="Visual abstract"
                  src={manuscript.visualAbstract}
                />
              </p> : <br/> }
              
              {manuscript.files.length > 0 ? 
              <div>
                Submitted files:
                {manuscript.files.map(file => (
                  <p>
                    <a
                      href={file.url}
                      rel="noopener noreferrer"
                      target="_blank"
                    >
                      {file.filename}
                    </a>
                  </p>
                ))}
              </div> : <br/> }

              {manuscript.submission?.links ? 
              <div>
                Submitted research objects:
                {manuscript.submission?.links?.map(link => (
                  <p>
                    <a
                      href={link.url}
                      rel="noopener noreferrer"
                      target="_blank"
                    >
                      {link.url}
                    </a>
                  </p>
                ))}
              </div> : <br/> }

            </SectionRow>
          </SectionContent>
        ))
      ) : (
        <Placeholder>No submissions have been published yet.</Placeholder>
      )}
    </Container>
  )
}
export default Frontpage