# encoding: utf-8

class Survey

  include Mongoid::Document
  include Mongoid::Timestamps

  ResultChart = 0
  ResultExtern = 1
  ResultFile = 2

  scope :available_for_lang, ->(locale){ where("available_for_#{locale}".to_sym => true) }
  scope :can_display, where(is_hidden: false)

  field :title, :localize => true
  field :description, :localize => true

  field :create_user_id
  field :update_user_id

  field :postdate, :type => DateTime
  field :deadline, :type => DateTime

  field :is_hidden, :type => Boolean, :default => false

  field :result_type, :type => Integer, :default => 0
  field :extern_link
  mount_uploader :upload_file, AssetUploader

  field :jump_mode, :type => Boolean, :default => false

  field :redirect_mode, :type => Boolean, :default => false
  field :redirect_url, :type => String
  
  validates :title, :at_least_one => true

  has_many :survey_questions, :autosave => true, :dependent => :destroy
  has_many :survey_answers, :dependent => :destroy

  accepts_nested_attributes_for :survey_questions, :allow_destroy => true

  before_save :check_deadline, :update_avliable_language

  def time_range
    r = "#{self.postdate.to_date}"
    r += "- #{self.deadline.to_date}" if self.deadline
    r
  end

  def result
    I18n.t 'survey.view_result'
  end

  def generate_chart_data
    survey_questions = self.survey_questions.all
    survey_answers = self.survey_answers.all

    chart_data = {}

    survey_questions.each do |question|
      qid = question.id.to_s
      case question.type
      when ::SurveyQuestion::Radio, ::SurveyQuestion::Select
        chart_data[qid] = {}
        answers = survey_answers.each do |answer|
          if answer[qid]
            chart_data[qid][answer[qid]] ||= 0
            chart_data[qid][answer[qid]] += 1
          end
        end
      when ::SurveyQuestion::Check
        chart_data[qid] = {}
        answers = survey_answers.each do |answer|
          if answer[qid]
            answer[qid].each do |option|
              chart_data[qid][option] ||= 0
              chart_data[qid][option] += 1
            end
          end
        end
      when ::SurveyQuestion::Radiogroup
        chart_data[qid] = {}
        answers = survey_answers.each do |answer|
          if answer[qid]
            answer[qid].each do |option, group|
              chart_data[qid][option] ||= {}
              chart_data[qid][option][group] ||= 0
              chart_data[qid][option][group] += 1
            end
          end
        end
      end
    end

    [chart_data, survey_questions, survey_answers]
  end

  protected
  
  def check_deadline
    if(!self.deadline.nil? and (self.deadline < self.postdate ))
      self.deadline = nil
    end
  end
  
  def update_avliable_language
    VALID_LOCALES.each  do |locale|
      if (title_translations[locale].blank? rescue true)
        self["available_for_#{locale}".to_sym] = false 
      else
        self["available_for_#{locale}".to_sym] = true
      end
    end
  end

end