var h = require('mutant/h')
var nest = require('depnest')
var extend = require('xtend')
var ref = require('ssb-ref')

exports.needs = nest({
  'message.html': {
    decorate: 'reduce',
    layout: 'first'
  },
  'profile.html.person': 'first'
})

exports.gives = nest('message.html.render')

exports.create = function (api) {
  return nest('message.html.render', function renderMessage (msg, opts) {
    if (msg.value.content.type !== 'contact') return
    if (!ref.isFeed(msg.value.content.contact)) return
    if (typeof msg.value.content.following !== 'boolean') return

    var element = api.message.html.layout(msg, extend({
      miniContent: messageContent(msg),
      layout: 'mini'
    }, opts))

    return api.message.html.decorate(element, { msg })
  })

  function messageContent (msg) {
    var following = msg.value.content.following
    return [
      following ? 'followed ' : 'unfollowed ',
      api.profile.html.person(msg.value.content.contact)
    ]
  }
}