mongoose = require 'mongoose'
plugins = require '../plugins/plugins'
AchievablePlugin = require '../plugins/achievements'
jsonschema = require '../../app/schemas/models/level_session'
log = require 'winston'
config = require '../../server_config'

LevelSessionSchema = new mongoose.Schema({
  created:
    type: Date
    'default': Date.now
}, {strict: false,read:config.mongo.readpref})

LevelSessionSchema.index({creator: 1})
LevelSessionSchema.index({level: 1})
LevelSessionSchema.index({levelID: 1})
LevelSessionSchema.index({'level.majorVersion': 1})
LevelSessionSchema.index({'level.original': 1}, {name: 'Level Original'})
LevelSessionSchema.index({'level.original': 1, 'level.majorVersion': 1, 'creator': 1, 'team': 1})
LevelSessionSchema.index({creator: 1, level: 1})  # Looks like the ones operating on level as two separate fields might not be working, and sometimes this query uses the "level" index instead of the "creator" index.
LevelSessionSchema.index({playtime: 1}, {name: 'Playtime'})
LevelSessionSchema.index({submitted: 1}, {sparse: true})
LevelSessionSchema.index({team: 1}, {sparse: true})
LevelSessionSchema.index({totalScore: 1}, {sparse: true})
LevelSessionSchema.index({user: 1, changed: -1}, {name: 'last played index', sparse: true})
LevelSessionSchema.index({levelID: 1, changed: -1}, {name: 'last played by level index', sparse: true})  # Needed for getRecentSessions for CampaignLevelView
LevelSessionSchema.index({'level.original': 1, 'state.topScores.type': 1, 'state.topScores.date': -1, 'state.topScores.score': -1}, {name: 'top scores index', sparse: true})
LevelSessionSchema.index({submitted: 1, team: 1, level: 1, totalScore: -1}, {name: 'rank counting index', sparse: true})
#LevelSessionSchema.index({level: 1, 'leagues.leagueID': 1, submitted: 1, team: 1, totalScore: -1}, {name: 'league rank counting index', sparse: true})  # needed for league leaderboards?
LevelSessionSchema.index({levelID: 1, submitted: 1, team: 1}, {name: 'get all scores index', sparse: true})
#LevelSessionSchema.index({levelID: 1, 'leagues.leagueID': 1, submitted: 1, team: 1}, {name: 'league get all scores index', sparse: true})  # needed for league histograms?
LevelSessionSchema.index({submitted: 1, team: 1, levelID: 1, submitDate: -1}, {name: 'matchmaking index', sparse: true})
LevelSessionSchema.index({submitted: 1, team: 1, levelID: 1, randomSimulationIndex: -1}, {name: 'matchmaking random index', sparse: true})
LevelSessionSchema.index({'leagues.leagueID': 1, submitted: 1, levelID: 1, team: 1, randomSimulationIndex: -1}, {name: 'league-based matchmaking random index', sparse: true})  # Really need MongoDB 3.2 for partial indexes for this and several others: https://jira.mongodb.org/browse/SERVER-785

LevelSessionSchema.plugin(plugins.PermissionsPlugin)
LevelSessionSchema.plugin(AchievablePlugin)

LevelSessionSchema.post 'init', (doc) ->
  unless doc.previousStateInfo
    doc.previousStateInfo =
      'state.complete': doc.get 'state.complete'
      playtime: doc.get 'playtime'

LevelSessionSchema.pre 'save', (next) ->
  User = require './User'  # Avoid mutual inclusion cycles
  Level = require './Level'
  now = new Date()
  @set('changed', now)

  id = @get('id')
  initd = @previousStateInfo?
  levelID = @get('levelID')
  userID = @get('creator')
  activeUserEvent = null

  # Newly completed level
  if not (initd and @previousStateInfo['state.complete']) and @get('state.complete')
    @set('dateFirstCompleted', now)
    Level.findOne({slug: levelID}).select('concepts -_id').lean().exec (err, level) ->
      log.error err if err?
      update = $inc: {'stats.gamesCompleted': 1}
      for concept in level?.concepts ? []
        update.$inc["stats.concepts.#{concept}"] = 1
      User.findByIdAndUpdate userID, update, {new: true}, (err, user) ->
        log.error err if err?
        oldCopy = user.toObject()
        oldCopy.stats = _.clone oldCopy.stats
        --oldCopy.stats.gamesCompleted
        oldCopy.stats.concepts ?= {}
        for concept in level?.concepts ? []
          --oldCopy.stats.concepts[concept]
        User.schema.statics.createNewEarnedAchievements user, oldCopy
    activeUserEvent = "level-completed/#{levelID}"

  # Spent at least 30s playing this level
  if not initd and @get('playtime') >= 30 or initd and (@get('playtime') - @previousStateInfo['playtime'] >= 30)
    activeUserEvent = "level-playtime/#{levelID}"

  if activeUserEvent?
    User.saveActiveUser userID, activeUserEvent, next
  else
    next()

LevelSessionSchema.statics.privateProperties = ['code', 'submittedCode', 'unsubscribed']
LevelSessionSchema.statics.editableProperties = ['players', 'code', 'codeLanguage', 'completed', 'state',
                                                 'levelName', 'creatorName', 'levelID',
                                                 'chat', 'teamSpells', 'submitted', 'submittedCodeLanguage',
                                                 'unsubscribed', 'playtime', 'heroConfig', 'team',
                                                 'browser']
LevelSessionSchema.statics.jsonSchema = jsonschema

LevelSessionSchema.set('toObject', {
  transform: (doc, ret, options) ->
    req = options.req
    return ret unless req # TODO: Make deleting properties the default, but the consequences are far reaching

    submittedCode = doc.get('submittedCode')
    unless req.user?.isAdmin() or req.user?.id is doc.get('creator') or ('employer' in (req.user?.get('permissions') ? [])) or not doc.get('submittedCode') # TODO: only allow leaderboard access to non-top-5 solutions
      ret = _.omit ret, LevelSession.privateProperties
    if req.query.interpret
      plan = submittedCode[if doc.get('team') is 'humans' then 'hero-placeholder' else 'hero-placeholder-1']?.plan ? ''
      plan = LZString.compressToUTF16 plan
      ret.interpret = plan
      ret.code = submittedCode
    return ret
})

if config.mongo.level_session_replica_string?
  levelSessionMongo = mongoose.createConnection()
  levelSessionMongo.open config.mongo.level_session_replica_string, (error) ->
    if error
      log.error "Couldn't connect to session mongo!", error
    else
      log.info "Connected to seperate level session server with string", config.mongo.level_session_replica_string
else
  levelSessionMongo = mongoose

LevelSession = levelSessionMongo.model('level.session', LevelSessionSchema, 'level.sessions')

if config.mongo.level_session_aux_replica_string?
  auxLevelSessionMongo = mongoose.createConnection()
  auxLevelSessionMongo.open config.mongo.level_session_aux_replica_string, (error) ->
    if error
      log.error "Couldn't connect to AUX session mongo!", error
    else
      log.info "Connected to seperate level AUX session server with string", config.mongo.level_session_aux_replica_string

  auxLevelSession = auxLevelSessionMongo.model('level.session', LevelSessionSchema, 'level.sessions')

  LevelSessionSchema.post 'save', (d) ->
    return unless d instanceof LevelSession
    o = d.toObject {transform: ((x, r) -> r), virtuals: false}
    auxLevelSession.collection.save o,  {w:1}, (err, v) ->
      log.error err.stack if err

module.exports = LevelSession