const FileUpload = require('./fileupload')
const PageTree = require('../page_tree')

const api = require('../api')
const Editor = require('./editor')

const EditPage = {
  oninit: function(vnode) {
    this.loading = false
    this.showLoading = null
    this.data = {
      page: null,
    }
    this.pages = [{id: null, name: 'Frontpage'}]
    this.pages = this.pages.concat(PageTree.getFlatTree())

    this.newBanner = null
    this.newMedia = null
    this.editor = null

    this.fetchPage(vnode)
  },

  onbeforeupdate: function(vnode) {
    if (this.lastid !== m.route.param('id')) {
      this.fetchPage(vnode)
    }
  },

  fetchPage: function(vnode) {
    this.lastid = m.route.param('id')

    return this.requestPage(
      api.sendRequest({
        method: 'GET',
        url: '/api/auth/pages/' + (this.lastid === 'add' ? '0' : this.lastid),
      })
    )
  },

  requestPage: function(data) {
    this.error = ''

    if (this.showLoading) {
      clearTimeout(this.showLoading)
    }

    if (this.data.page) {
      this.showLoading = setTimeout(() => {
        this.showLoading = null
        this.loading = true
        m.redraw()
      }, 150)
    } else {
      this.loading = true
    }

    data
    .then((result) => {
      this.data = result
      if (this.data.page.id) {
        document.title = 'Editing: ' + this.data.page.name + ' - Admin NFP Moe'
        this.editedPath = true
      } else {
        document.title = 'Create Page - Admin NFP Moe'
      }
    }, (err) => {
      this.error = err.message
    })
    .then(() => {
      clearTimeout(this.showLoading)
      this.showLoading = null
      this.loading = false
      m.redraw()
    })
  },

  updateValue: function(name, e) {
    this.data.page[name] = e.currentTarget.value
    if (name === 'path') {
      this.editedPath = true
    } else if (name === 'name' && !this.editedPath) {
      this.data.page.path = this.data.page.name.toLowerCase().replace(/ /g, '-')
    }
  },

  updateParent: function(e) {
    this.data.page.parent_id = Number(e.currentTarget.value) || null
  },

  mediaUploaded: function(type, file) {
    if (type === 'banner') {
      this.newBanner = file
    } else {
      this.newMedia = file
    }
  },

  mediaRemoved: function(type) {
    this.data.page['remove_' + type] = true
    this.data.page[type + '_prefix'] = null
  },

  save: function(vnode, e) {
    e.preventDefault()
    if (!this.data.page.name) {
      this.error = 'Name is missing'
    } else if (!this.data.page.path) {
      this.error = 'Path is missing'
    } else {
      this.error = ''
    }
    if (this.error) return

    let formData = new FormData()
    if (this.newBanner) {
      formData.append('banner', this.newBanner.file)
    }
    if (this.newMedia) {
      formData.append('media', this.newMedia.file)
    }
    if (this.data.page.id) {
      formData.append('id', this.data.page.id)
    }

    formData.append('name', this.data.page.name)
    formData.append('parent_id', this.data.page.parent_id || null)
    formData.append('path', this.data.page.path)
    formData.append('remove_banner', this.data.page.remove_banner ? true : false)
    formData.append('remove_media', this.data.page.remove_media ? true : false)

    this.loading = true

    this.requestPage(
      this.editor.save()
      .then(body => {
        formData.append('content', JSON.stringify(body))

        return api.sendRequest({
          method: 'PUT',
          url: '/api/auth/pages/' + (this.lastid === 'add' ? '0' : this.lastid),
          body: formData,
        })
      })
      .then(data => {
        if (!data.page.id) {
          throw new Error('Something went wrong with saving, try again later')
        } else if (this.lastid === 'add') {
          this.lastid = data.page.id.toString()
          m.route.set('/admin/pages/' + data.page.id)
        }
        return PageTree.refreshTree().then(() => {
          this.pages = [{id: null, name: 'Frontpage'}]
          this.pages = this.pages.concat(PageTree.getFlatTree())

          return data
        })
      })
    )
  },

  view: function(vnode) {
    const bannerImage = this.data.page && this.data.page.banner_prefix
      ? this.data.page.banner_prefix + '_large.avif'
      : null
    const mediaImage = this.data.page && this.data.page.media_prefix
      ? this.data.page.media_prefix + '_large.avif'
      : null

    return [
      this.loading && !this.data.page
        ? m('div.admin-spinner.loading-spinner')
        : null,
      this.data.page
        ? m('div.admin-wrapper', [
          this.loading
            ? m('div.loading-spinner')
            : null,
          m('div.admin-actions', this.data.page.id
            ? [
              m('span', 'Actions:'),
              m(m.route.Link, { href: '/page/' + this.data.page.path }, 'View page'),
            ]
            : null),
          m('article.editarticle', [
            m('header', m('h1',
                (this.data.page.id ? 'Edit ' : 'Create Page ') + (this.data.page.name || '(untitled)')
              )
            ),
            m('div.error', {
              hidden: !this.error,
              onclick: () => { vnode.state.error = '' },
            }, this.error),
            m(FileUpload, {
              height: 300,
              onfile: this.mediaUploaded.bind(this, 'banner'),
              ondelete: this.mediaRemoved.bind(this, 'banner'),
              media: bannerImage,
            }),
            m(FileUpload, {
              class: 'cover',
              useimg: true,
              onfile: this.mediaUploaded.bind(this, 'media'),
              ondelete: this.mediaRemoved.bind(this, 'media'),
              media: mediaImage,
            }),
            m('form.editarticle.content', {
              onsubmit: this.save.bind(this, vnode),
            }, [
              m('label', 'Parent'),
              m('select', {
                onchange: this.updateParent.bind(this),
              }, this.pages.filter(item => !this.data.page || item.id !== this.data.page.id).map((item) => {
                  return m('option', {
                    value: item.id || 0,
                    selected: item.id === this.data.page.parent_id
                  }, item.name)
                })),
              m('div.input-row', [
                m('div.input-group', [
                  m('label', 'Name'),
                  m('input', {
                    type: 'text',
                    value: this.data.page.name,
                    oninput: this.updateValue.bind(this, 'name'),
                  }),
                ]),
                m('div.input-group', [
                  m('label', 'Path'),
                  m('input', {
                    type: 'text',
                    value: this.data.page.path,
                    oninput: this.updateValue.bind(this, 'path'),
                  }),
                ]),
              ]),
              m('label', 'Description'),
              m(Editor, {
                oncreate: (subnode) => {
                  this.editor = subnode.state.editor
                },
                contentdata: this.data.page.content,
              }),
              m('div', {
                hidden: !this.data.page.name || !this.data.page.path
              }, [
                m('input', {
                  type: 'submit',
                  value: 'Save',
                }),
              ]),
            ]),
          ]),
        ])
      : m('div.error', {
          hidden: !this.error,
          onclick: () => { this.fetchPage(vnode) },
        }, this.error),,
    ]
  },
}

module.exports = EditPage