const smarkt = require('smarkt')
const _ = require('lodash')
const html = require('nanohtml')


var archive = new DatArchive(window.location)

function store (state, emitter) {
  state.library = []
  state.info = {}
  state.covers = {}
  state.identity = ''

  emitter.on('DOMContentLoaded', function () {
    setIdentity()
    archive.readdir('zines')
      .then(zines => mapToState(zines))
  })

  emitter.on('update library', function (zine) {
    addToLibrary(zine)
    addZineInfo(zine.url)
    addZineCover(zine.url)
  })

  function mapToState (zines) {
    zines.map(zine => {
      archive.readFile(`zines/${zine}`)
        .then(rawText => {
          var textJson = smarkt.parse(rawText)
          addToLibrary(textJson)
          addZineInfo(textJson.url)
          addZineCover(textJson.url)
        })
    })
  }

  function addToLibrary (text) {
    state.library = [...state.library, text]
    emitter.emit('pushState')
  }

  function addZineInfo (datUrl) {
    var zine = new DatArchive(datUrl)
    zine.readFile('distro/info.txt')
      .then(text => {
	mapInfoToState(text, zine['url'])
      })
  }

  function addZineCover (datUrl) {
    var zine = new DatArchive(datUrl)
    zine.readdir('distro')
      .then(files => {
	mapCoverToState(files, zine['url'])
      })
  }

  function mapInfoToState (info, datUrl) {
    var infoJson = smarkt.parse(info)
    state.info[datUrl] = infoJson
    emitter.emit('pushState')
  }

  function mapCoverToState (files, datUrl) {
    var cover = files.find(file => sansExtension(file) === 'cover')
    state.covers[datUrl] = `${datUrl}/distro/${cover}`
    emitter.emit('pushState')
  }
  
  async function setIdentity () {
    var info = await archive.getInfo()
    if (info.isOwner) {
      state.identity = 'librarian'
      emitter.emit('pushState')
    } else {
      state.identity = 'visitor'
      emitter.emit('pushstate')
    }
  }
}

function sansExtension (file) {
  return file.split('.')[0]
}

module.exports = store