codecombat/app/views/teachers/TeacherStudentView.coffee

RootView = require 'views/core/RootView'
Campaigns = require 'collections/Campaigns'
Classroom = require 'models/Classroom'
Courses = require 'collections/Courses'
Levels = require 'collections/Levels'
LevelSession = require 'models/LevelSession'
LevelSessions = require 'collections/LevelSessions'
User = require 'models/User'
Users = require 'collections/Users'
CourseInstances = require 'collections/CourseInstances'
# Users = require 'collections/Users'
# helper = require 'lib/coursesHelper'
# popoverTemplate = require 'templates/courses/classroom-level-popover'
# Prepaids = require 'collections/Prepaids'
# utils = require 'core/utils'
# CocoCollection = require 'collections/CocoCollection'



module.exports = class TeacherStudentView extends RootView
  id: 'teacher-student-view'
  template: require 'templates/teachers/teacher-student-view'
  # helper: helper
  events:
    'click .assign-student-button': 'onClickAssignStudentButton'
    'click .enroll-student-button': 'onClickEnrollStudentButton' # this button isn't working yet

  getTitle: -> return @user?.broadName()

  initialize: (options, classroomID, @studentID) ->
    @classroom = new Classroom({_id: classroomID})
    @listenToOnce @classroom, 'sync', @onClassroomSync
    @supermodel.trackRequest(@classroom.fetch())

    @courses = new Courses()
    # @courses.comparator = '_id'
    # @courseInstances = new CocoCollection([], { url: "/db/course_instance", model: CourseInstance})
    # @courseInstances.comparator = 'courseID'
    # @supermodel.loadCollection(@courseInstances, { data: { classroomID: classroomID } })
    # @listenToOnce @courses, 'sync', @onCourseInstancesSync
    @supermodel.trackRequest(@courses.fetch({data: { project: 'name' }}))

    @courseInstances = new CourseInstances()
    @supermodel.trackRequest @courseInstances.fetchForClassroom(classroomID)

    @levels = new Levels()
    # @levels.fetchForClassroom(classroomID, {data: {project: 'name,original,practice,slug'}})
    # @levels.on 'add', (model) -> @_byId[model.get('original')] = model # so you can 'get' them
    @supermodel.trackRequest(@levels.fetchForClassroom(classroomID, {data: {project: 'name,original'}}))
    #
    # @user = new User({_id: studentID})
    # @supermodel.trackRequest(@user.fetch())

    @urls = require('core/urls')


    @singleStudentLevelProgressDotTemplate = require 'templates/teachers/hovers/progress-dot-single-student-level'
    @levelProgressMap = {}

    super(options)

  onLoaded: ->
    if @students.loaded and not @destroyed
      @user = _.find(@students.models, (s)=> s.id is @studentID)
      @updateLastPlayedString()
      @updateLevelProgressMap()
      @updateLevelAverages()
      @render()
    super()

  afterRender: ->
    super(arguments...)
    $('.progress-dot, .btn-view-project-level').each (i, el) ->
      dot = $(el)
      dot.tooltip({
        html: true
        container: dot
      }).delegate '.tooltip', 'mousemove', ->
        dot.tooltip('hide')

  onClassroomSync: ->
    # Now that we have the classroom from db, can request all level sessions for this classroom
    @sessions = new LevelSessions()
    @sessions.comparator = 'changed' # Sort level sessions by changed field, ascending
    @listenTo @sessions, 'sync', @onSessionsSync
    @supermodel.trackRequests(@sessions.fetchForAllClassroomMembers(@classroom))

    @students = new Users()
    jqxhrs = @students.fetchForClassroom(@classroom, removeDeleted: true)
    # @listenTo @students, ->
    #   console.log @students
    @supermodel.trackRequests jqxhrs

  onSessionsSync: ->
    # Now we have some level sessions, and enough data to calculate last played string
    # This may be called multiple times due to paged server API calls via fetchForAllClassroomMembers
    return if @destroyed # Don't do anything if page was destroyed after db request
    @updateLastPlayedString()
    @updateLevelProgressMap()
    @updateLevelAverages()


  # onCourseInstancesSync: ->
  #   # @sessions = new CocoCollection([], { model: LevelSession })
  #   for courseInstance in @courseInstances.models
  #     sessions = new CocoCollection([], { url: "/db/course_instance/#{courseInstance.id}/level_sessions", model: LevelSession })
  #     @supermodel.loadCollection(sessions, { data: { project: ['level', 'playtime', 'creator', 'changed', 'state.complete'].join(' ') } })
  #     courseInstance.sessions = sessions
  #     sessions.courseInstance = courseInstance
  #     courseInstance.sessionsByUser = {}
  #     @listenToOnce sessions, 'sync', (sessions) ->
  #       @sessions.add(sessions.slice())
  #       for courseInstance in @courseInstances.models
  #         courseInstance.sessionsByUser = courseInstance.sessions.groupBy('creator')
  #
  #   # Generate course instance JIT, in the meantime have models w/out equivalents in the db
  #   for course in @courses.models
  #     query = {courseID: course.id, classroomID: @classroom.id}
  #     courseInstance = @courseInstances.findWhere(query)
  #     if not courseInstance
  #       courseInstance = new CourseInstance(query)
  #       @courseInstances.add(courseInstance)
  #       courseInstance.sessions = new CocoCollection([], {model: LevelSession})
  #       # sessions.courseInstance = courseInstance
  #       courseInstance.sessionsByUser = {}

  updateLastPlayedString: ->
    # Make sure all our data is loaded, @sessions may not even be intialized yet
    return unless @courses.loaded and @levels.loaded and @sessions?.loaded and @user?.loaded

    # Use lodash to find the last session for our user, @sessions already sorted by changed date
    session = _.findLast @sessions.models, (s) => s.get('creator') is @user.id

    return unless session

    # Find course for this level session, for it's name
    # Level.original is the original id, used for level versioning, and connects levels to level sessions
    for versionedCourse in @classroom.get('courses') ? []
      for level in versionedCourse.levels
        if level.original is session.get('level').original
          # Found the level for our level session in the classroom versioned courses
          # Find the full course so we can get it's name
          course = _.find @courses.models, (c) => c.id is versionedCourse._id
          break

    # Find level for this level session, for it's name
    level = @levels.findWhere({original: session.get('level').original})

    # Update last played string based on what we found
    @lastPlayedString = ""
    @lastPlayedString += course.get('name') if course
    @lastPlayedString += ", " if course and level
    @lastPlayedString += level.get('name') if level
    @lastPlayedString += ", " if @lastPlayedString
    @lastPlayedString += session.get('changed')
    # Rerun template/jade file to display new last played string
    @render()

  updateLevelProgressMap: ->
    return unless @courses.loaded and @levels.loaded and @sessions?.loaded and @user?.loaded

    # Map levels to sessions once, so we don't have to search entire session list multiple times below
    @levelSessionMap = {}
    for session in @sessions.models when session.get('creator') is @studentID
      @levelSessionMap[session.get('level').original] = session


    # Create mapping of level to student progress
    @levelProgressMap = {}
    for versionedCourse in @classroom.get('courses') ? []
      for versionedLevel in versionedCourse.levels
        session = @levelSessionMap[versionedLevel.original]
        if session
          if session.get('state')?.complete
            @levelProgressMap[versionedLevel.original] = 'complete'
          else
            @levelProgressMap[versionedLevel.original] = 'started'
        else
          @levelProgressMap[versionedLevel.original] = 'not started'

  updateLevelAverages: ->
    return unless @courses.loaded and @levels.loaded and @sessions?.loaded

    @allLevelSessionMap = {}
    for versionedCourse in @classroom.get('courses') ? []
      for versionedLevel in versionedCourse.levels
        @playTime = 0
        @timesPlayed = 0
        for session in @sessions.models
          if session.get('level').original == versionedLevel.original
            @playTime += session.get('playtime') or 0
            # console.log (session.get('playtime'))
            @timesPlayed += 1
        if @timesPlayed

          console.log "playtime", @playTime
          console.log "times played", @timesPlayed
          @allLevelSessionMap[versionedLevel.original] = Math.round(@playTime / @timesPlayed)
    console.log (@allLevelSessionMap)

    # new map for averages of all classroom playtimes
    # @averageLevelPlaytimeMap = {}
    #   for versionedCourse in @classroom.get('courses') ? []
    #     for versionedLevel in versionedCourse.levels
    #       var totalPlaytime = null
    #       var totalSessions = 0
    #       session = @levelSessionMap[versionedLevel.original]
    #       # get playtimes for each session in all classroom sessions of this course with this particular level
    #       if totalPlaytime
    #         var averagePlaytime = totalPlaytime / totalSessions
    #         @averagePlaytimeMap[versionedLevel.original] = averagePlaytime

  studentStatusString: () ->
    status = @user.prepaidStatus()
    expires = @user.get('coursePrepaid')?.endDate
    string = switch status
      when 'not-enrolled' then $.i18n.t('teacher.status_not_enrolled')
      when 'enrolled' then (if expires then $.i18n.t('teacher.status_enrolled') else '-')
      when 'expired' then $.i18n.t('teacher.status_expired')
    return string.replace('{{date}}', moment(expires).utc().format('l'))

  onClickEnrollStudentButton: (e) ->
    userID = $(e.currentTarget).data('user-id')
    user = @user.get(userID)
    selectedUsers = new Users([user])
    @enrollStudents(selectedUsers)
    window.tracker?.trackEvent $(e.currentTarget).data('event-action'), category: 'Teachers', classroomID: @classroom.id, userID: userID, ['Mixpanel']

  enrollStudents: (selectedUsers) ->
    modal = new ActivateLicensesModal { @classroom, selectedUsers, users: @user }
    @openModalView(modal)
    modal.once 'redeem-users', (enrolledUsers) =>
      enrolledUsers.each (newUser) =>
        user = @user.get(newUser.id)
        if user
          user.set(newUser.attributes)
      null
  #
  # onLoaded: ->
  #   console.log("on loaded")
  #   for courseInstance in @courseInstances.models
  #     courseID = courseInstance.get('courseID')
  #     course = @courses.get(courseID)
  #     # courseInstance.sessions.course = course
  #   @updateLastPlayedString()
  #   super()
  #
  # afterRender: ->
  #   @$('[data-toggle="popover"]').popover({
  #     html: true
  #     trigger: 'hover'
  #     placement: 'top'
  #   })
  #   super()
  #
  # levelPopoverContent: (level, session, i) ->
  #   return null unless level
  #   context = {
  #     moment: moment
  #     level: level
  #     session: session
  #     i: i
  #     canViewSolution: @teacherMode
  #   }
  #   return popoverTemplate(context)
  #
  # getLevelURL: (level, course, courseInstance, session) ->
  #   return null unless @teacherMode and _.all(arguments)
  #   "/play/level/#{level.get('slug')}?course=#{course.id}&course-instance=#{courseInstance.id}&session=#{session.id}&observing=true"