window.Metamaps = window.Metamaps || {}
/* global Metamaps, Backbone, $ */

/*
 * Metamaps.Router.js.erb
 *
 * Dependencies:
 *  - Metamaps.Active
 *  - Metamaps.GlobalUI
 *  - Metamaps.JIT
 *  - Metamaps.Loading
 *  - Metamaps.Map
 *  - Metamaps.Maps
 *  - Metamaps.Topic
 *  - Metamaps.Views
 *  - Metamaps.Visualize
 */

const _Router = Backbone.Router.extend({
  routes: {
    '': 'home', // #home
    'explore/:section': 'explore', // #explore/active
    'explore/:section/:id': 'explore', // #explore/mapper/1234
    'maps/:id': 'maps' // #maps/7
  },
  home: function () {
    clearTimeout(Metamaps.Router.timeoutId)

    if (Metamaps.Active.Mapper) document.title = 'Explore Active Maps | Metamaps'
    else document.title = 'Home | Metamaps'

    Metamaps.Router.currentSection = ''
    Metamaps.Router.currentPage = ''
    $('.wrapper').removeClass('mapPage topicPage')

    var classes = Metamaps.Active.Mapper ? 'homePage explorePage' : 'homePage'
    $('.wrapper').addClass(classes)

    var navigate = function () {
      Metamaps.Router.timeoutId = setTimeout(function () {
        Metamaps.Router.navigate('')
      }, 300)
    }

    // all this only for the logged in home page
    if (Metamaps.Active.Mapper) {
      $('.homeButton a').attr('href', '/')
      Metamaps.GlobalUI.hideDiv('#yield')

      Metamaps.GlobalUI.showDiv('#explore')

      Metamaps.Views.exploreMaps.setCollection(Metamaps.Maps.Active)
      if (Metamaps.Maps.Active.length === 0) {
        Metamaps.Maps.Active.getMaps(navigate) // this will trigger an explore maps render
      } else {
        Metamaps.Views.exploreMaps.render(navigate)
      }
    } else {
      // logged out home page
      Metamaps.GlobalUI.hideDiv('#explore')
      Metamaps.GlobalUI.showDiv('#yield')
      Metamaps.Router.timeoutId = setTimeout(navigate, 500)
    }

    Metamaps.GlobalUI.hideDiv('#infovis')
    Metamaps.GlobalUI.hideDiv('#instructions')
    Metamaps.Map.end()
    Metamaps.Topic.end()
    Metamaps.Active.Map = null
    Metamaps.Active.Topic = null
  },
  explore: function (section, id) {
    clearTimeout(Metamaps.Router.timeoutId)

    // just capitalize the variable section
    // either 'featured', 'mapper', or 'active'
    var capitalize = section.charAt(0).toUpperCase() + section.slice(1)

    if (section === 'shared' || section === 'featured' || section === 'active' || section === 'starred') {
      document.title = 'Explore ' + capitalize + ' Maps | Metamaps'
    } else if (section === 'mapper') {
      $.ajax({
        url: '/users/' + id + '.json',
        success: function (response) {
          document.title = response.name + ' | Metamaps'
        },
        error: function () {}
      })
    } else if (section === 'mine') {
      document.title = 'Explore My Maps | Metamaps'
    }

    if (Metamaps.Active.Mapper && section != 'mapper') $('.homeButton a').attr('href', '/explore/' + section)
    $('.wrapper').removeClass('homePage mapPage topicPage')
    $('.wrapper').addClass('explorePage')

    Metamaps.Router.currentSection = 'explore'
    Metamaps.Router.currentPage = section

    // this will mean it's a mapper page being loaded
    if (id) {
      if (Metamaps.Maps.Mapper.mapperId !== id) {
        // empty the collection if we are trying to load the maps
        // collection of a different mapper than we had previously
        Metamaps.Maps.Mapper.reset()
        Metamaps.Maps.Mapper.page = 1
      }
      Metamaps.Maps.Mapper.mapperId = id
    }

    Metamaps.Views.exploreMaps.setCollection(Metamaps.Maps[capitalize])

    var navigate = function () {
      var path = '/explore/' + Metamaps.Router.currentPage

      // alter url if for mapper profile page
      if (Metamaps.Router.currentPage === 'mapper') {
        path += '/' + Metamaps.Maps.Mapper.mapperId
      }
      
      Metamaps.Router.navigate(path)
    }
    var navigateTimeout = function () {
      Metamaps.Router.timeoutId = setTimeout(navigate, 300)
    }
    if (Metamaps.Maps[capitalize].length === 0) {
      Metamaps.Loading.show()
      setTimeout(function () {
        Metamaps.Maps[capitalize].getMaps(navigate) // this will trigger an explore maps render
      }, 300) // wait 300 milliseconds till the other animations are done to do the fetch
    } else {
      if (id) {
        Metamaps.Views.exploreMaps.fetchUserThenRender(navigateTimeout)
      } else {
        Metamaps.Views.exploreMaps.render(navigateTimeout)
      }
    }

    Metamaps.GlobalUI.showDiv('#explore')
    Metamaps.GlobalUI.hideDiv('#yield')
    Metamaps.GlobalUI.hideDiv('#infovis')
    Metamaps.GlobalUI.hideDiv('#instructions')
    Metamaps.Map.end()
    Metamaps.Topic.end()
    Metamaps.Active.Map = null
    Metamaps.Active.Topic = null
  },
  maps: function (id) {
    clearTimeout(Metamaps.Router.timeoutId)

    document.title = 'Map ' + id + ' | Metamaps'

    Metamaps.Router.currentSection = 'map'
    Metamaps.Router.currentPage = id

    $('.wrapper').removeClass('homePage explorePage topicPage')
    $('.wrapper').addClass('mapPage')
    // another class will be added to wrapper if you
    // can edit this map '.canEditMap'

    Metamaps.GlobalUI.hideDiv('#yield')
    Metamaps.GlobalUI.hideDiv('#explore')

    // clear the visualization, if there was one, before showing its div again
    if (Metamaps.Visualize.mGraph) {
      Metamaps.Visualize.mGraph.graph.empty()
      Metamaps.Visualize.mGraph.plot()
      Metamaps.JIT.centerMap(Metamaps.Visualize.mGraph.canvas)
    }
    Metamaps.GlobalUI.showDiv('#infovis')
    Metamaps.Topic.end()
    Metamaps.Active.Topic = null

    Metamaps.Loading.show()
    Metamaps.Map.end()
    Metamaps.Map.launch(id)
  },
  topics: function (id) {
    clearTimeout(Metamaps.Router.timeoutId)

    document.title = 'Topic ' + id + ' | Metamaps'

    Metamaps.Router.currentSection = 'topic'
    Metamaps.Router.currentPage = id

    $('.wrapper').removeClass('homePage explorePage mapPage')
    $('.wrapper').addClass('topicPage')

    Metamaps.GlobalUI.hideDiv('#yield')
    Metamaps.GlobalUI.hideDiv('#explore')

    // clear the visualization, if there was one, before showing its div again
    if (Metamaps.Visualize.mGraph) {
      Metamaps.Visualize.mGraph.graph.empty()
      Metamaps.Visualize.mGraph.plot()
      Metamaps.JIT.centerMap(Metamaps.Visualize.mGraph.canvas)
    }
    Metamaps.GlobalUI.showDiv('#infovis')
    Metamaps.Map.end()
    Metamaps.Active.Map = null

    Metamaps.Topic.end()
    Metamaps.Topic.launch(id)
  }
})

const Router = new _Router()
Router.currentPage = ''
Router.currentSection = undefined
Router.timeoutId = undefined

Router.intercept = function (evt) {
  var segments

  var href = {
    prop: $(this).prop('href'),
    attr: $(this).attr('href')
  }
  var root = window.location.protocol + '//' + window.location.host + Backbone.history.options.root

  if (href.prop && href.prop === root) href.attr = ''

  if (href.prop && href.prop.slice(0, root.length) === root) {
    evt.preventDefault()

    segments = href.attr.split('/')
    segments.splice(0, 1) // pop off the element created by the first /

    if (href.attr === '') {
      Metamaps.Router.home()
    } else {
      Metamaps.Router[segments[0]](segments[1], segments[2])
    }
  }
}

Router.init = function () {
  Backbone.history.start({
    silent: true,
    pushState: true,
    root: '/'
  })
  $(document).on('click', 'a[data-router="true"]', Metamaps.Router.intercept)
}

export default Router