codecombat/app/views/ladder/LadderTabView.coffee

CocoView = require 'views/core/CocoView'
CocoClass = require 'core/CocoClass'
Level = require 'models/Level'
LevelSession = require 'models/LevelSession'
CocoCollection = require 'collections/CocoCollection'
User = require 'models/User'
LeaderboardCollection  = require 'collections/LeaderboardCollection'
{teamDataFromLevel} = require './utils'
ModelModal = require 'views/modal/ModelModal'
require 'vendor/d3'

HIGHEST_SCORE = 1000000

module.exports = class LadderTabView extends CocoView
  id: 'ladder-tab-view'
  template: require 'templates/play/ladder/ladder-tab-view'

  events:
    'click .connect-facebook': 'onConnectFacebook'
    'click .connect-google-plus': 'onConnectGPlus'
    'click .name-col-cell': 'onClickPlayerName'
    'click .load-more-ladder-entries': 'onLoadMoreLadderEntries'

  subscriptions:
    'auth:facebook-api-loaded': 'checkFriends'
    'auth:gplus-api-loaded': 'checkFriends'
    'auth:logged-in-with-facebook': 'onConnectedWithFacebook'
    'auth:logged-in-with-gplus': 'onConnectedWithGPlus'

  constructor: (options, @level, @sessions) ->
    super(options)
    @teams = teamDataFromLevel @level
    @leaderboards = {}
    @refreshLadder()
    @socialNetworkRes = @supermodel.addSomethingResource('social_network_apis', 0)
    @checkFriends()

  checkFriends: ->
    return if @checked or (not window.FB) or (not window.gapi)
    @checked = true

    # @addSomethingToLoad('facebook_status')

    @fbStatusRes = @supermodel.addSomethingResource('facebook_status', 0)
    @fbStatusRes.load()

    FB.getLoginStatus (response) =>
      return if @destroyed
      @facebookStatus = response.status
      @loadFacebookFriends() if @facebookStatus is 'connected'
      @fbStatusRes.markLoaded()

    if application.gplusHandler.loggedIn is undefined
      @listenToOnce(application.gplusHandler, 'checked-state', @gplusSessionStateLoaded)
    else
      @gplusSessionStateLoaded()

    @socialNetworkRes.markLoaded()

  # FACEBOOK

  onConnectFacebook: ->
    @connecting = true
    FB.login()

  onConnectedWithFacebook: -> location.reload() if @connecting

  loadFacebookFriends: ->
    # @addSomethingToLoad('facebook_friends')

    @fbFriendRes = @supermodel.addSomethingResource('facebook_friends', 0)
    @fbFriendRes.load()

    FB.api '/me/friends', @onFacebookFriendsLoaded

  onFacebookFriendsLoaded: (response) =>
    @facebookData = response.data
    @loadFacebookFriendSessions()
    @fbFriendRes.markLoaded()

  loadFacebookFriendSessions: ->
    levelFrag = "#{@level.get('original')}.#{@level.get('version').major}"
    url = "/db/level/#{levelFrag}/leaderboard_facebook_friends"

    @fbFriendSessionRes = @supermodel.addRequestResource('facebook_friend_sessions', {
      url: url
      data: { friendIDs: (f.id for f in @facebookData) }
      method: 'POST'
      success: @onFacebookFriendSessionsLoaded
    })
    @fbFriendSessionRes.load()

  onFacebookFriendSessionsLoaded: (result) =>
    friendsMap = {}
    friendsMap[friend.id] = friend.name for friend in @facebookData
    for friend in result
      friend.name = friendsMap[friend.facebookID]
      friend.otherTeam = if friend.team is 'humans' then 'ogres' else 'humans'
      friend.imageSource = "http://graph.facebook.com/#{friend.facebookID}/picture"
    @facebookFriendSessions = result
    @render() # because the ladder tab renders before waiting for fb to finish

  # GOOGLE PLUS

  onConnectGPlus: ->
    @connecting = true
    @listenToOnce application.gplusHandler, 'logged-in', @onConnectedWithGPlus
    application.gplusHandler.reauthorize()

  onConnectedWithGPlus: -> location.reload() if @connecting

  gplusSessionStateLoaded: ->
    if application.gplusHandler.loggedIn
      #@addSomethingToLoad('gplus_friends')
      @gpFriendRes = @supermodel.addSomethingResource('gplus_friends', 0)
      @gpFriendRes.load()
      application.gplusHandler.loadFriends @gplusFriendsLoaded

  gplusFriendsLoaded: (friends) =>
    @gplusData = friends.items
    @loadGPlusFriendSessions()
    @gpFriendRes.markLoaded()

  loadGPlusFriendSessions: ->
    levelFrag = "#{@level.get('original')}.#{@level.get('version').major}"
    url = "/db/level/#{levelFrag}/leaderboard_gplus_friends"

    @gpFriendSessionRes = @supermodel.addRequestResource('gplus_friend_sessions', {
      url: url
      data: { friendIDs: (f.id for f in @gplusData) }
      method: 'POST'
      success: @onGPlusFriendSessionsLoaded
    })
    @gpFriendSessionRes.load()

  onGPlusFriendSessionsLoaded: (result) =>
    friendsMap = {}
    friendsMap[friend.id] = friend for friend in @gplusData
    for friend in result
      friend.name = friendsMap[friend.gplusID].displayName
      friend.otherTeam = if friend.team is 'humans' then 'ogres' else 'humans'
      friend.imageSource = friendsMap[friend.gplusID].image.url
    @gplusFriendSessions = result
    @render() # because the ladder tab renders before waiting for gplus to finish

  # LADDER LOADING

  refreshLadder: ->
    @supermodel.resetProgress()
    @ladderLimit ?= parseInt @getQueryVariable('top_players', 20)
    for team in @teams
      if oldLeaderboard = @leaderboards[team.id]
        @supermodel.removeModelResource oldLeaderboard
        oldLeaderboard.destroy()
      teamSession = _.find @sessions.models, (session) -> session.get('team') is team.id
      @leaderboards[team.id] = new LeaderboardData(@level, team.id, teamSession, @ladderLimit)
      @leaderboardRes = @supermodel.addModelResource(@leaderboards[team.id], 'leaderboard', {cache: false}, 3)
      @leaderboardRes.load()

  render: ->
    super()

    @$el.find('.histogram-display').each (i, el) =>
      histogramWrapper = $(el)
      team = _.find @teams, name: histogramWrapper.data('team-name')
      histogramData = null
      $.when(
        $.get "/db/level/#{@level.get('slug')}/histogram_data?team=#{team.name.toLowerCase()}", {cache: false}, (data) -> histogramData = data
      ).then =>
        @generateHistogram(histogramWrapper, histogramData, team.name.toLowerCase()) unless @destroyed

  getRenderData: ->
    ctx = super()
    ctx.level = @level
    ctx.link = "/play/level/#{@level.get('name')}"
    ctx.teams = @teams
    team.leaderboard = @leaderboards[team.id] for team in @teams
    ctx.levelID = @levelID
    ctx.friends = @consolidateFriends()
    ctx.onFacebook = @facebookStatus is 'connected'
    ctx.onGPlus = application.gplusHandler.loggedIn
    ctx.capitalize = _.string.capitalize
    ctx

  generateHistogram: (histogramElement, histogramData, teamName) ->
    #renders twice, hack fix
    if $('#' + histogramElement.attr('id')).has('svg').length then return
    histogramData = histogramData.map (d) -> d*100

    margin =
      top: 20
      right: 20
      bottom: 30
      left: 0

    width = 300 - margin.left - margin.right
    height = 125 - margin.top - margin.bottom

    formatCount = d3.format(',.0')

    minX = Math.floor(Math.min(histogramData...) / 1000) * 1000
    maxX = Math.ceil(Math.max(histogramData...) / 1000) * 1000
    x = d3.scale.linear().domain([minX, maxX]).range([0, width])
    data = d3.layout.histogram().bins(x.ticks(20))(histogramData)
    y = d3.scale.linear().domain([0, d3.max(data, (d) -> d.y)]).range([height, 10])

    #create the x axis
    xAxis = d3.svg.axis().scale(x).orient('bottom').ticks(5).outerTickSize(0)

    svg = d3.select('#' + histogramElement.attr('id')).append('svg')
      .attr('width', width + margin.left + margin.right)
      .attr('height', height + margin.top + margin.bottom)
    .append('g')
      .attr('transform', "translate(#{margin.left}, #{margin.top})")
    barClass = 'bar'
    if teamName.toLowerCase() is 'ogres' then barClass = 'ogres-bar'
    if teamName.toLowerCase() is 'humans' then barClass = 'humans-bar'

    bar = svg.selectAll('.bar')
      .data(data)
    .enter().append('g')
      .attr('class', barClass)
      .attr('transform', (d) -> "translate(#{x(d.x)}, #{y(d.y)})")

    bar.append('rect')
      .attr('x', 1)
      .attr('width', width/20)
      .attr('height', (d) -> height - y(d.y))
    if @leaderboards[teamName].session?
      playerScore = @leaderboards[teamName].session.get('totalScore') * 100
      scorebar = svg.selectAll('.specialbar')
        .data([playerScore])
        .enter().append('g')
        .attr('class', 'specialbar')
        .attr('transform', "translate(#{x(playerScore)}, #{y(9001)})")

      scorebar.append('rect')
        .attr('x', 1)
        .attr('width', 3)
        .attr('height', height - y(9001))
    rankClass = 'rank-text'
    if teamName.toLowerCase() is 'ogres' then rankClass = 'rank-text ogres-rank-text'
    if teamName.toLowerCase() is 'humans' then rankClass = 'rank-text humans-rank-text'

    message = "#{histogramData.length} players"
    if @leaderboards[teamName].session?
      if @leaderboards[teamName].myRank <= histogramData.length
        message="##{@leaderboards[teamName].myRank} of #{histogramData.length}"
      else
        message='Rank your session!'
    svg.append('g')
      .append('text')
      .attr('class', rankClass)
      .attr('y', 0)
      .attr('text-anchor', 'end')
      .attr('x', width)
      .text(message)

    #Translate the x-axis up
    svg.append('g')
      .attr('class', 'x axis')
      .attr('transform', 'translate(0, ' + height + ')')
      .call(xAxis)

  consolidateFriends: ->
    allFriendSessions = (@facebookFriendSessions or []).concat(@gplusFriendSessions or [])
    sessions = _.uniq allFriendSessions, false, (session) -> session._id
    sessions = _.sortBy sessions, 'totalScore'
    sessions.reverse()
    sessions

  # Admin view of players' code
  onClickPlayerName: (e) ->
    return unless me.isAdmin()
    row = $(e.target).parent()
    player = new User _id: row.data 'player-id'
    session = new LevelSession _id: row.data 'session-id'
    @openModalView new ModelModal models: [session, player]

  onLoadMoreLadderEntries: (e) ->
    @ladderLimit ?= 100
    @ladderLimit += 100
    @refreshLadder()

module.exports.LeaderboardData = LeaderboardData = class LeaderboardData extends CocoClass
  ###
  Consolidates what you need to load for a leaderboard into a single Backbone Model-like object.
  ###

  constructor: (@level, @team, @session, @limit) ->
    super()

  fetch: ->
    console.warn 'Already have top players on', @ if @topPlayers
    @topPlayers = new LeaderboardCollection(@level, {order: -1, scoreOffset: HIGHEST_SCORE, team: @team, limit: @limit})
    promises = []
    promises.push @topPlayers.fetch cache: false

    if @session
      score = @session.get('totalScore') or 10
      @playersAbove = new LeaderboardCollection(@level, {order: 1, scoreOffset: score, limit: 4, team: @team})
      promises.push @playersAbove.fetch cache: false
      @playersBelow = new LeaderboardCollection(@level, {order: -1, scoreOffset: score, limit: 4, team: @team})
      promises.push @playersBelow.fetch cache: false
      level = "#{@level.get('original')}.#{@level.get('version').major}"
      success = (@myRank) =>
      promises.push $.ajax("/db/level/#{level}/leaderboard_rank?scoreOffset=#{@session.get('totalScore')}&team=#{@team}", cache: false, success: success)
    @promise = $.when(promises...)
    @promise.then @onLoad
    @promise.fail @onFail
    @promise

  onLoad: =>
    return if @destroyed or not @topPlayers.loaded
    @loaded = true
    @loading = false
    @trigger 'sync', @
    # TODO: cache user ids -> names mapping, and load them here as needed,
    #   and apply them to sessions. Fetching each and every time is too costly.

  onFail: (resource, jqxhr) =>
    return if @destroyed
    @trigger 'error', @, jqxhr

  inTopSessions: ->
    return me.id in (session.attributes.creator for session in @topPlayers.models)

  nearbySessions: ->
    return [] unless @session?.get('totalScore')
    l = []
    above = @playersAbove.models
    l = l.concat(above)
    l.reverse()
    l.push @session
    l = l.concat(@playersBelow.models)
    if @myRank
      startRank = @myRank - 4
      session.rank = startRank + i for session, i in l
    l

  allResources: ->
    resources = [@topPlayers, @playersAbove, @playersBelow]
    return (r for r in resources when r)