codecombat/app/lib/LevelLoader.coffee

Level = require 'models/Level'
LevelComponent = require 'models/LevelComponent'
LevelSystem = require 'models/LevelSystem'
Article = require 'models/Article'
LevelSession = require 'models/LevelSession'
ThangType = require 'models/ThangType'
ThangNamesCollection = require 'collections/ThangNamesCollection'

CocoClass = require 'lib/CocoClass'
AudioPlayer = require 'lib/AudioPlayer'
app = require 'application'
World = require 'lib/world/world'

# This is an initial stab at unifying loading and setup into a single place which can
# monitor everything and keep a LoadingScreen visible overall progress.
#
# Would also like to incorporate into here:
#  * World Building
#  * Sprite map generation
#  * Connecting to Firebase

module.exports = class LevelLoader extends CocoClass

  constructor: (options) ->
    @t0 = new Date().getTime()
    super()
    @supermodel = options.supermodel
    @supermodel.setMaxProgress 0.2
    @levelID = options.levelID
    @sessionID = options.sessionID
    @opponentSessionID = options.opponentSessionID
    @team = options.team
    @headless = options.headless
    @inLevelEditor = options.inLevelEditor
    @spectateMode = options.spectateMode ? false

    @worldNecessities = []
    @listenTo @supermodel, 'resource-loaded', @onWorldNecessityLoaded
    @loadSession()
    @loadLevel()
    @loadAudio()
    @playJingle()
    if @supermodel.finished()
      @onSupermodelLoaded()
    else
      @listenToOnce @supermodel, 'loaded-all', @onSupermodelLoaded

  playJingle: ->
    return if @headless
    # Apparently the jingle, when it tries to play immediately during all this loading, you can't hear it.
    # Add the timeout to fix this weird behavior.
    f = ->
      jingles = ['ident_1', 'ident_2']
      AudioPlayer.playInterfaceSound jingles[Math.floor Math.random() * jingles.length]
    setTimeout f, 500

  # Session Loading

  loadSession: ->
    return if @headless
    if @sessionID
      url = "/db/level_session/#{@sessionID}"
    else
      url = "/db/level/#{@levelID}/session"
      url += "?team=#{@team}" if @team

    session = new LevelSession().setURL url
    @sessionResource = @supermodel.loadModel(session, 'level_session', {cache: false})
    @session = @sessionResource.model
    @listenToOnce @session, 'sync', ->
      @session.url = -> '/db/level.session/' + @id
      @loadDependenciesForSession(@session)

    if @opponentSessionID
      opponentSession = new LevelSession().setURL "/db/level_session/#{@opponentSessionID}"
      @opponentSessionResource = @supermodel.loadModel(opponentSession, 'opponent_session')
      @opponentSession = @opponentSessionResource.model
      @listenToOnce @opponentSession, 'sync', @loadDependenciesForSession

  loadDependenciesForSession: (session) ->
    return if @levelID is 'sky-span'  # TODO
    # TODO: I think this runs afoul of https://github.com/codecombat/codecombat/issues/1108
    # TODO: this shouldn't happen when it's not a hero level, but we don't have level loaded yet,
    # and the sessions are being created with default hero config regardless of whether it's a hero level.
    if heroConfig = session.get('heroConfig')
      url = "/db/thang.type/#{heroConfig.thangType}/version?project=name,components,original"
      @worldNecessities.push @maybeLoadURL(url, ThangType, 'thang')

      for itemThangType in _.values(heroConfig.inventory)
        url = "/db/thang.type/#{itemThangType}/version?project=name,components,original"
        @worldNecessities.push @maybeLoadURL(url, ThangType, 'thang')
    @populateHero() if @level?.loaded

  # Supermodel (Level) Loading

  loadLevel: ->
    @level = @supermodel.getModel(Level, @levelID) or new Level _id: @levelID
    if @level.loaded
      @populateLevel()
    else
      @level = @supermodel.loadModel(@level, 'level').model
      @listenToOnce @level, 'sync', @onLevelLoaded

  onLevelLoaded: ->
    @populateLevel()
    @populateHero() if @session?.loaded

  populateLevel: ->
    thangIDs = []
    componentVersions = []
    systemVersions = []
    articleVersions = []

    flagThang = thangType: '53fa25f25bc220000052c2be', id: 'Placeholder Flag', components: []
    for thang in (@level.get('thangs') or []).concat [flagThang]
      thangIDs.push thang.thangType
      @loadItemThangsEquippedByLevelThang(thang)
      for comp in thang.components or []
        componentVersions.push _.pick(comp, ['original', 'majorVersion'])

    for system in @level.get('systems') or []
      systemVersions.push _.pick(system, ['original', 'majorVersion'])
      if indieSprites = system?.config?.indieSprites
        for indieSprite in indieSprites
          thangIDs.push indieSprite.thangType

    unless @headless
      for article in @level.get('documentation')?.generalArticles or []
        articleVersions.push _.pick(article, ['original', 'majorVersion'])

    objUniq = (array) -> _.uniq array, false, (arg) -> JSON.stringify(arg)

    worldNecessities = []

    @thangIDs = _.uniq thangIDs
    @thangNames = new ThangNamesCollection(@thangIDs)
    worldNecessities.push @supermodel.loadCollection(@thangNames, 'thang_names')
    @listenToOnce @thangNames, 'sync', @onThangNamesLoaded
    worldNecessities.push @sessionResource if @sessionResource?.isLoading
    worldNecessities.push @opponentSessionResource if @opponentSessionResource?.isLoading

    for obj in objUniq componentVersions
      url = "/db/level.component/#{obj.original}/version/#{obj.majorVersion}"
      worldNecessities.push @maybeLoadURL(url, LevelComponent, 'component')
    for obj in objUniq systemVersions
      url = "/db/level.system/#{obj.original}/version/#{obj.majorVersion}"
      worldNecessities.push @maybeLoadURL(url, LevelSystem, 'system')
    for obj in objUniq articleVersions
      url = "/db/article/#{obj.original}/version/#{obj.majorVersion}"
      @maybeLoadURL url, Article, 'article'
    if obj = @level.get 'nextLevel'
      url = "/db/level/#{obj.original}/version/#{obj.majorVersion}"
      @maybeLoadURL url, Level, 'level'

    unless @headless
      wizard = ThangType.loadUniversalWizard()
      @supermodel.loadModel wizard, 'thang'

    @worldNecessities = @worldNecessities.concat worldNecessities

  populateHero: ->
    return
    return if @inLevelEditor
    return unless @level.get('type') is 'hero' and hero = _.find @level.get('thangs'), id: 'Hero Placeholder'
    heroConfig = @session.get('heroConfig')
    hero.thangType = heroConfig.thangType  # Will mutate the level, but we're okay showing the last-used Hero here
    #hero.id = ... ?  # What do we want to do about this?
    # Actually, swapping out inventory and placeholder Components is done in Level's denormalizeThang

  loadItemThangsEquippedByLevelThang: (levelThang) ->
    return unless levelThang.components
    for component in levelThang.components
      if component.original is LevelComponent.EquipsID and inventory = component.config?.inventory
        for itemThangType in _.values(inventory)
          unless itemThangType
            console.warn "Empty item in inventory for", levelThang
            continue
          url = "/db/thang.type/#{itemThangType}/version?project=name,components,original"
          @worldNecessities.push @maybeLoadURL(url, ThangType, 'thang')

  onThangNamesLoaded: (thangNames) ->
    if @level.get('type') is 'hero'
      for thangType in thangNames.models
        @loadDefaultComponentsForThangType(thangType)
        @loadEquippedItemsInheritedFromThangType(thangType)

  loadDefaultComponentsForThangType: (thangType) ->
    return unless components = thangType.get('components')
    for component in components
      url = "/db/level.component/#{component.original}/version/#{component.majorVersion}"
      @worldNecessities.push @maybeLoadURL(url, LevelComponent, 'component')

  loadEquippedItemsInheritedFromThangType: (thangType) ->
    for levelThang in @level.get('thangs') or []
      if levelThang.thangType is thangType.get('original')
        levelThang = $.extend true, {}, levelThang
        @level.denormalizeThang(levelThang, @supermodel)
        equipsComponent = _.find levelThang.components, {original: LevelComponent.EquipsID}
        inventory = equipsComponent?.config?.inventory
        continue unless inventory
        for itemThangType in _.values inventory
          url = "/db/thang.type/#{itemThangType}/version?project=name,components,original"
          @worldNecessities.push @maybeLoadURL(url, ThangType, 'thang')

  onWorldNecessityLoaded: (resource) ->
    index = @worldNecessities.indexOf(resource)
    if (@level?.loading or (@level?.get('type') is 'hero')) and resource.name is 'thang'
      @loadDefaultComponentsForThangType(resource.model)
      @loadEquippedItemsInheritedFromThangType(resource.model)

    return unless index >= 0
    @worldNecessities.splice(index, 1)
    @worldNecessities = (r for r in @worldNecessities when r?)
    @onWorldNecessitiesLoaded() if @worldNecessities.length is 0

  onWorldNecessitiesLoaded: =>
    @initWorld()
    @supermodel.clearMaxProgress()
    @trigger 'world-necessities-loaded'
    return if @headless
    thangsToLoad = _.uniq( (t.spriteName for t in @world.thangs when t.exists) )
    nameModelTuples = ([thangType.get('name'), thangType] for thangType in @thangNames.models)
    nameModelMap = _.zipObject nameModelTuples
    @spriteSheetsToBuild = []

    for thangTypeName in thangsToLoad
      thangType = nameModelMap[thangTypeName]
      console.log 'found ThangType', thangType, 'for', thangTypeName, 'of nameModelMap', nameModelMap unless thangType
      continue if thangType.isFullyLoaded()
      thangType.fetch()
      thangType = @supermodel.loadModel(thangType, 'thang').model
      res = @supermodel.addSomethingResource 'sprite_sheet', 5
      res.thangType = thangType
      res.markLoading()
      @spriteSheetsToBuild.push res

    @buildLoopInterval = setInterval @buildLoop, 5 if @spriteSheetsToBuild.length

  maybeLoadURL: (url, Model, resourceName) ->
    return if @supermodel.getModel(url)
    model = new Model().setURL url
    @supermodel.loadModel(model, resourceName)

  onSupermodelLoaded: ->
    return if @destroyed
    console.log 'SuperModel for Level loaded in', new Date().getTime() - @t0, 'ms'
    @loadLevelSounds()
    @denormalizeSession()
    app.tracker.updatePlayState(@level, @session) unless @headless

  buildLoop: =>
    someLeft = false
    for spriteSheetResource, i in @spriteSheetsToBuild
      continue if spriteSheetResource.spriteSheetKeys
      someLeft = true
      thangType = spriteSheetResource.thangType
      if thangType.loaded and not thangType.loading
        keys = @buildSpriteSheetsForThangType spriteSheetResource.thangType
        if keys and keys.length
          @listenTo spriteSheetResource.thangType, 'build-complete', @onBuildComplete
          spriteSheetResource.spriteSheetKeys = keys
        else
          spriteSheetResource.markLoaded()

    clearInterval @buildLoopInterval unless someLeft

  onBuildComplete: (e) ->
    resource = null
    for resource in @spriteSheetsToBuild
      break if e.thangType is resource.thangType
    resource.spriteSheetKeys = (k for k in resource.spriteSheetKeys when k isnt e.key)
    resource.markLoaded() if resource.spriteSheetKeys.length is 0

  denormalizeSession: ->
    return if @headless or @sessionDenormalized or @spectateMode
    patch =
      'levelName': @level.get('name')
      'levelID': @level.get('slug') or @level.id
    if me.id is @session.get 'creator'
      patch.creatorName = me.get('name')
    for key, value of patch
      if @session.get(key) is value
        delete patch[key]
    unless _.isEmpty patch
      @session.set key, value for key, value of patch
      tempSession = new LevelSession _id: @session.id
      tempSession.save(patch, {patch: true})
    @sessionDenormalized = true

  # Building sprite sheets

  buildSpriteSheetsForThangType: (thangType) ->
    return if @headless
    # TODO: Finish making sure the supermodel loads the raster image before triggering load complete, and that the cocosprite has access to the asset.
#    if f = thangType.get('raster')
#      queue = new createjs.LoadQueue()
#      queue.loadFile('/file/'+f)
    @grabThangTypeTeams() unless @thangTypeTeams
    keys = []
    for team in @thangTypeTeams[thangType.get('original')] ? [null]
      spriteOptions = {resolutionFactor: SPRITE_RESOLUTION_FACTOR, async: true}
      if thangType.get('kind') is 'Floor'
        spriteOptions.resolutionFactor = 2
      if team and color = @teamConfigs[team]?.color
        spriteOptions.colorConfig = team: color
      key = @buildSpriteSheet thangType, spriteOptions
      if _.isString(key) then keys.push key
    keys

  grabThangTypeTeams: ->
    @grabTeamConfigs()
    @thangTypeTeams = {}
    for thang in @level.get('thangs')
      for component in thang.components
        if team = component.config?.team
          @thangTypeTeams[thang.thangType] ?= []
          @thangTypeTeams[thang.thangType].push team unless team in @thangTypeTeams[thang.thangType]
          break
    @thangTypeTeams

  grabTeamConfigs: ->
    for system in @level.get('systems')
      if @teamConfigs = system.config?.teamConfigs
        break
    unless @teamConfigs
      # Hack: pulled from Alliance System code. TODO: put in just one place.
      @teamConfigs = {'humans': {'superteam': 'humans', 'color': {'hue': 0, 'saturation': 0.75, 'lightness': 0.5}, 'playable': true}, 'ogres': {'superteam': 'ogres', 'color': {'hue': 0.66, 'saturation': 0.75, 'lightness': 0.5}, 'playable': false}, 'neutral': {'superteam': 'neutral', 'color': {'hue': 0.33, 'saturation': 0.75, 'lightness': 0.5}}}
    @teamConfigs

  buildSpriteSheet: (thangType, options) ->
    if thangType.get('name') is 'Wizard'
      options.colorConfig = me.get('wizard')?.colorConfig or {}
    thangType.buildSpriteSheet options

  # World init

  initWorld: ->
    return if @initialized
    @initialized = true
    @world = new World()
    @world.levelSessionIDs = if @opponentSessionID then [@sessionID, @opponentSessionID] else [@sessionID]
    serializedLevel = @level.serialize(@supermodel, @session)
    @world.loadFromLevel serializedLevel, false
    console.log 'World has been initialized from level loader.'

  # Initial Sound Loading

  loadAudio: ->
    return if @headless
    AudioPlayer.preloadInterfaceSounds ['victory']

  loadLevelSounds: ->
    return if @headless
    scripts = @level.get 'scripts'
    return unless scripts

    for script in scripts when script.noteChain
      for noteGroup in script.noteChain when noteGroup.sprites
        for sprite in noteGroup.sprites when sprite.say?.sound
          AudioPlayer.preloadSoundReference(sprite.say.sound)

    thangTypes = @supermodel.getModels(ThangType)
    for thangType in thangTypes
      for trigger, sounds of thangType.get('soundTriggers') or {} when trigger isnt 'say'
        AudioPlayer.preloadSoundReference sound for sound in sounds

  # everything else sound wise is loaded as needed as worlds are generated

  progress: -> @supermodel.progress

  destroy: ->
    clearInterval @buildLoopInterval if @buildLoopInterval
    super()