RootView = require 'views/core/RootView'
Campaign = require 'models/Campaign'
Level = require 'models/Level'
Achievement = require 'models/Achievement'
ThangType = require 'models/ThangType'
CampaignView = require 'views/play/CampaignView'
CocoCollection = require 'collections/CocoCollection'
treemaExt = require 'core/treema-ext'
utils = require 'core/utils'
SaveCampaignModal = require './SaveCampaignModal'
RelatedAchievementsCollection = require 'collections/RelatedAchievementsCollection'
CampaignLevelView = require './CampaignLevelView'

achievementProject = ['related', 'rewards', 'name', 'slug']
thangTypeProject = ['name', 'original']

module.exports = class CampaignEditorView extends RootView
  id: "campaign-editor-view"
  template: require 'templates/editor/campaign/campaign-editor-view'
  className: 'editor'

  events:
    'click #save-button': 'onClickSaveButton'

  constructor: (options, @campaignHandle) ->
    super(options)
    @campaign = new Campaign({_id:@campaignHandle})
    @supermodel.loadModel(@campaign, 'campaign')

    @levels = new CocoCollection([], {
      model: Level
      url: "/db/campaign/#{@campaignHandle}/levels"
      project: Campaign.denormalizedLevelProperties
    })
    @supermodel.loadCollection(@levels, 'levels')

    @achievements = new CocoCollection([], {
      model: Achievement
      url: "/db/campaign/#{@campaignHandle}/achievements"
      project: achievementProject
    })
    @supermodel.loadCollection(@achievements, 'achievements')

    @toSave = new Backbone.Collection()
    @listenToOnce @campaign ,'sync', @loadThangTypeNames
    @listenToOnce @campaign, 'sync', @onFundamentalLoaded
    @listenToOnce @levels, 'sync', @onFundamentalLoaded
    @listenToOnce @achievements, 'sync', @onFundamentalLoaded

    _.delay @getCampaignDropOffs, 1000

  loadThangTypeNames: ->
    # Load the names of the ThangTypes that this level's Treema nodes might want to display.
    originals = []
    for level in _.values(@campaign.get('levels'))
      originals = originals.concat(_.values(level.requiredGear)) if level.requiredGear
      originals = originals.concat(_.values(level.restrictedGear)) if level.restrictedGear
      originals = originals.concat(level.allowedHeroes) if level.allowedHeroes
    originals = _.uniq _.flatten originals
    for original in originals
      thangType = new ThangType()
      thangType.setProjection(thangTypeProject)
      thangType.setURL("/db/thang.type/#{original}/version")
      @supermodel.loadModel(thangType, 'thang')

  onFundamentalLoaded: ->
    # Load any levels which haven't been denormalized into our campaign.
    return unless @campaign.loaded and @levels.loaded and @achievements.loaded
    for level in _.values(@campaign.get('levels'))
      continue if model = @levels.findWhere(original: level.original)
      model = new Level({})
      model.setProjection Campaign.denormalizedLevelProperties
      model.setURL("/db/level/#{level.original}/version")
      @levels.add @supermodel.loadModel(model, 'level').model
      achievements = new RelatedAchievementsCollection level.original
      achievements.setProjection achievementProject
      @supermodel.loadCollection achievements, 'achievements'
      @listenToOnce achievements, 'sync', ->
        @achievements.add(achievements.models)

  onLoaded: ->
    @toSave.add @campaign if @campaign.hasLocalChanges()
    campaignLevels = $.extend({}, @campaign.get('levels'))
    for level in @levels.models
      levelOriginal = level.get('original')
      campaignLevel = campaignLevels[levelOriginal]
      continue if not campaignLevel

      $.extend campaignLevel, _.omit(level.attributes, '_id')
      achievements = @achievements.where {'related': levelOriginal}
      rewards = []
      for achievement in achievements
        for rewardType, rewardArray of achievement.get('rewards')
          for reward in rewardArray
            rewardObject = { achievement: achievement.id }

            if rewardType is 'heroes'
              rewardObject.hero = reward
              thangType = new ThangType({}, {project: thangTypeProject})
              thangType.setURL("/db/thang.type/#{reward}/version")
              @supermodel.loadModel(thangType, 'thang')

            if rewardType is 'levels'
              rewardObject.level = reward
              if not @levels.findWhere({original: reward})
                level = new Level({}, {project: Campaign.denormalizedLevelProperties})
                level.setURL("/db/level/#{reward}/version")
                @supermodel.loadModel(level, 'level')

            if rewardType is 'items'
              rewardObject.item = reward
              thangType = new ThangType({}, {project: thangTypeProject})
              thangType.setURL("/db/thang.type/#{reward}/version")
              @supermodel.loadModel(thangType, 'thang')

            rewards.push rewardObject
      campaignLevel.rewards = rewards
      delete campaignLevel.unlocks
      campaignLevel.campaign = @campaign.get 'slug'
      campaignLevels[levelOriginal] = campaignLevel

    @campaign.set('levels', campaignLevels)

    for level in _.values campaignLevels
      model = @levels.findWhere {original: level.original}
      model.set key, level[key] for key in Campaign.denormalizedLevelProperties
      @toSave.add model if model.hasLocalChanges()
      @updateRewardsForLevel model, level.rewards

    super()

  getRenderData: ->
    c = super()
    c.campaign = @campaign
    c.campaignDropOffs = @campaignDropOffs
    c

  onClickSaveButton: ->
    @toSave.set @toSave.filter (m) -> m.hasLocalChanges()
    @openModalView new SaveCampaignModal({}, @toSave)

  afterRender: ->
    super()
    treemaOptions =
      schema: Campaign.schema
      data: $.extend({}, @campaign.attributes)
      filePath: "db/campaign/#{@campaign.get('_id')}"
      callbacks:
        change: @onTreemaChanged
        select: @onTreemaSelectionChanged
        dblclick: @onTreemaDoubleClicked
      nodeClasses:
        levels: LevelsNode
        level: LevelNode
        campaigns: CampaignsNode
        campaign: CampaignNode
        achievement: AchievementNode
      supermodel: @supermodel

    @treema = @$el.find('#campaign-treema').treema treemaOptions
    @treema.build()
    @treema.open()
    @treema.childrenTreemas.levels?.open()

    @campaignView = new CampaignView({editorMode: true, supermodel: @supermodel}, @campaignHandle)
    @campaignView.highlightElement = _.noop # make it stop
    @listenTo @campaignView, 'level-moved', @onCampaignLevelMoved
    @listenTo @campaignView, 'adjacent-campaign-moved', @onAdjacentCampaignMoved
    @listenTo @campaignView, 'level-clicked', @onCampaignLevelClicked
    @listenTo @campaignView, 'level-double-clicked', @onCampaignLevelDoubleClicked
    @insertSubView @campaignView

  onTreemaChanged: (e, nodes) =>
    for node in nodes
      path = node.getPath()
      if _.string.startsWith path, '/levels/'
        parts = path.split('/')
        original = parts[2]
        level = @supermodel.getModelByOriginal Level, original
        campaignLevel = @treema.get "/levels/#{original}"

        @updateRewardsForLevel level, campaignLevel.rewards

        level.set key, campaignLevel[key] for key in Campaign.denormalizedLevelProperties
        @toSave.add level if level.hasLocalChanges()

    @toSave.add @campaign
    @campaign.set key, value for key, value of @treema.data
    @campaignView.setCampaign(@campaign)

  onTreemaDoubleClicked: (e, node) =>
    path = node.getPath()
    return unless _.string.startsWith path, '/levels/'
    original = path.split('/')[2]
    @openCampaignLevelView @supermodel.getModelByOriginal Level, original

  onCampaignLevelMoved: (e) ->
    path = "levels/#{e.levelOriginal}/position"
    @treema.set path, e.position

  onAdjacentCampaignMoved: (e) ->
    path = "adjacentCampaigns/#{e.campaignID}/position"
    @treema.set path, e.position

  onCampaignLevelClicked: (levelOriginal) ->
    return unless levelTreema = @treema.childrenTreemas?.levels?.childrenTreemas?[levelOriginal]
    if key.ctrl or key.command
      url = "/editor/level/#{levelTreema.data.slug}"
      window.open url, '_blank'
    levelTreema.select()
    #levelTreema.open()

  onCampaignLevelDoubleClicked: (levelOriginal) ->
    @openCampaignLevelView @supermodel.getModelByOriginal Level, levelOriginal

  openCampaignLevelView: (level) ->
    @insertSubView campaignLevelView = new CampaignLevelView({}, level)
    @listenToOnce campaignLevelView, 'hidden', => @$el.find('#campaign-view').show()
    @$el.find('#campaign-view').hide()

  updateRewardsForLevel: (level, rewards) ->
    achievements = @supermodel.getModels(Achievement)
    achievements = (a for a in achievements when a.get('related') is level.get('original'))
    for achievement in achievements
      rewardSubset = (r for r in rewards when r.achievement is achievement.id)
      oldRewards = achievement.get 'rewards'
      newRewards = {}

      heroes = _.compact((r.hero for r in rewardSubset))
      newRewards.heroes = heroes if heroes.length

      items = _.compact((r.item for r in rewardSubset))
      newRewards.items = items if items.length

      levels = _.compact((r.level for r in rewardSubset))
      newRewards.levels = levels if levels.length

      newRewards.gems = oldRewards.gems if oldRewards.gems
      achievement.set 'rewards', newRewards
      if achievement.hasLocalChanges()
        @toSave.add achievement

  getCampaignDropOffs: =>
    # Fetch last 7 days of campaign drop-off rates

    startDay = new Date()
    startDay.setDate(startDay.getUTCDate() - 6)
    startDay = startDay.getUTCFullYear() + '-' + (startDay.getUTCMonth() + 1) + '-' + startDay.getUTCDate()

    success = (data) =>
      return if @destroyed
      # API returns all the campaign data currently
      @campaignDropOffs = data[@campaignHandle]
      mapFn = (item) ->
        item.startDropRate = (item.startDropped / item.started * 100).toFixed(2)
        item.finishDropRate = (item.finishDropped / item.finished * 100).toFixed(2)
        item
      @campaignDropOffs.levels = _.map @campaignDropOffs.levels, mapFn, @
      @campaignDropOffs.startDay = startDay
      @render()

    # TODO: Why do we need this url dash?
    request = @supermodel.addRequestResource 'campaign_drop_offs', {
      url: '/db/analytics_log_event/-/campaign_drop_offs'
      data: {startDay: startDay, slugs: [@campaignHandle]}
      method: 'POST'
      success: success
    }, 0
    request.load()


class LevelsNode extends TreemaObjectNode
  valueClass: 'treema-levels'
  @levels: {}

  buildValueForDisplay: (valEl, data) ->
    @buildValueForDisplaySimply valEl, ''+_.size(data)

  childPropertiesAvailable: -> @childSource

  childSource: (req, res) =>
    s = new Backbone.Collection([], {model:Level})
    s.url = '/db/level'
    s.fetch({data: {term:req.term, project: Campaign.denormalizedLevelProperties.join(',')}})
    s.once 'sync', (collection) =>
      for level in collection.models
        LevelsNode.levels[level.get('original')] = level
        @settings.supermodel.registerModel level
      mapped = ({label: r.get('name'), value: r.get('original')} for r in collection.models)
      res(mapped)


class LevelNode extends TreemaObjectNode
  valueClass: 'treema-level'
  buildValueForDisplay: (valEl, data) ->
    name = data.name
    if data.requiresSubscription
      name = "[P] " + name

    status = ''
    el = 'strong'
    if data.adminOnly
      status += " (disabled)"
      el = 'span'
    else if data.adventurer
      status += " (adventurer)"

    completion = ''
    if data.tasks
      completion = "#{(t for t in data.tasks when t.complete).length} / #{data.tasks.length}"

    valEl.append $("<a href='/editor/level/#{_.string.slugify(data.name)}' class='spr'>(e)</a>")
    valEl.append $("<#{el}></#{el}>").addClass('treema-shortened').text name
    if status
      valEl.append $('<em class="spl"></em>').text status
    if completion
      valEl.append $('<span class="completion"></span>').text completion

  populateData: ->
    return if @data.name?
    data = _.pick LevelsNode.levels[@keyForParent].attributes, Campaign.denormalizedLevelProperties
    _.extend @data, data

class CampaignsNode extends TreemaObjectNode
  valueClass: 'treema-campaigns'
  @campaigns: {}

  buildValueForDisplay: (valEl, data) ->
    @buildValueForDisplaySimply valEl, ''+_.size(data)

  childPropertiesAvailable: -> @childSource

  childSource: (req, res) =>
    s = new Backbone.Collection([], {model:Campaign})
    s.url = '/db/campaign'
    s.fetch({data: {term:req.term, project: Campaign.denormalizedCampaignProperties}})
    s.once 'sync', (collection) ->
      CampaignsNode.campaigns[campaign.id] = campaign for campaign in collection.models
      mapped = ({label: r.get('name'), value: r.id} for r in collection.models)
      res(mapped)


class CampaignNode extends TreemaObjectNode
  valueClass: 'treema-campaign'
  buildValueForDisplay: (valEl, data) ->
    @buildValueForDisplaySimply valEl, data.name

  populateData: ->
    return if @data.name?
    data = _.pick CampaignsNode.campaigns[@keyForParent].attributes, Campaign.denormalizedCampaignProperties
    _.extend @data, data

class AchievementNode extends treemaExt.IDReferenceNode
  buildSearchURL: (term) -> "#{@url}?term=#{term}&project=#{achievementProject.join(',')}"