const Fileinfo = require('./fileinfo')
const EditorBlock = require('./editorblock')

const Article = {
  oninit: function(vnode) {
    this.lastId = null
    this.onbeforeupdate(vnode)
  },

  onbeforeupdate: function(vnode) {
    let article = vnode.attrs.article

    if (this.lastId !== article.id) {
      this.lastId = article.id

      if (article.media_alt_prefix) {
        this.pictureFallback = article.media_alt_prefix + '_small.jpg'
        this.pictureJpeg = article.media_alt_prefix + '_small.jpg' + ' 720w, '
                        + article.media_alt_prefix + '_medium.jpg' + ' 1300w, '
                        + article.media_alt_prefix + '_large.jpg 1920w'
        this.pictureAvif = article.media_alt_prefix + '_small.avif' + ' 720w, '
                        + article.media_alt_prefix + '_medium.avif' + ' 1300w, '
                        + article.media_alt_prefix + '_large.avif 1920w'

        if (vnode.attrs.full) {
          this.pictureCover = '(max-width: 1280) calc(100vw - 2rem), '
            + '1248px'
        } else {
          this.pictureCover = '(max-width: 639px) calc(100vw - 40px), '
                        + '(max-width: 1000px) 300px, '
                        + '400px'
        }
      } else {
        this.pictureFallback = null
        this.pictureJpeg = null
        this.pictureAvif = null
        this.pictureCover = null
      }
    }
  },

  view: function(vnode) {
    let article = vnode.attrs.article
    let files = vnode.attrs.files || article.files || []

    return m('article', {
      class: vnode.attrs.full ? 'fullsize' : '',
    }, [
      m(m.route.Link,
        { href: '/article/' + article.path, class: 'title' },
        m('h2', article.name)
      ),
      m('div.row', [
        this.pictureFallback
          ? m(vnode.attrs.full ? 'a' : m.route.Link, {
                class: 'cover',
                target: vnode.attrs.full ? '_blank' : '',
                href: vnode.attrs.full ? article.media_path : '/article/' + article.path,
              },
              m('picture', [
                m('source', {
                  srcset: this.pictureAvif,
                  sizes: this.pictureCover,
                  type: 'image/avif',
                }),
                m('img', {
                  srcset: this.pictureJpeg,
                  sizes: this.pictureCover,
                  alt: 'Image for news item ' + article.name,
                  src: this.pictureFallback,
                }),
              ])
            )
          : null,
        m('div', [
          m('div.description',
            article.content.blocks.map(block => {
              return m(EditorBlock, { block: block })
            }),
          ),
          files.map(function(file) {
            return m(Fileinfo, { file: file, trim: true })
          }),
          m('p.meta', [
            'Posted ',
            (article.page_path ? ['in ', m(m.route.Link, { href: '/page/' + article.page_path }, article.page_name), ' '] : ''),
            'at ' + (article.publish_at.replace('T', ' ').split('.')[0]).substr(0, 16),
            ' by ' + (article.admin_name || 'Admin'),
          ]),
        ]),
      ]),
    ])
  },
}

module.exports = Article