module SurveysHelper
  QuestionTypeMap = ['radio','check','title']
  QuestionTypeOptionMap = ['radio','check']
  SelectableQuestionTypeMap = ['check','radio']
  CustomOptionTypeMap = ['for_each_option','new_option']
  OptionLayoutTypeMap = ['list_each_option_for_one_line','continuous_list_arrangement']
  def self.set_locale(locale)
    @locale = locale
    @use_custom_option_title = I18n.t('survey_question.use_custom_option')
  end
  
  def self.get_locale(locale)
    locale = locale || @locale || I18n.locale
    if defined?(@locale).nil?
      self.set_locale(locale)
    end
    locale
  end

  def self.parse_value(answer,locale=nil)
    locale = self.get_locale(locale)
    tmp = self.parse_exel_value(answer,locale: locale)
    tmp[1].nil? ? tmp[0] : "#{tmp[0]}(#{tmp[1]})"
  end

  def self.parse_checkbox_value_html(answer,locale=nil)
    locale = self.get_locale(locale)
    Array(answer).collect do |v|
      self.parse_value(v['value'],locale)
    end.join(", ")
  end

  def self.convert_bool_to_exel_value(flag)
    flag ? '1' : ''
  end
  
  def self.parse_exel_value(answer,xargs)
    locale = xargs[:locale]
    locale = self.get_locale(locale)
    options = xargs[:options]
    chart_data = xargs[:chart_data]
    use_custom_option = xargs[:use_custom_option]
    case answer
    when BSON::Document
      if options
        values = options.collect do |name,id|
          flag = (id==answer['oid'])
          if flag
            chart_data[name] ||= 0
            chart_data[name] += 1
          end
        end
        if use_custom_option
          values << answer['other']
        end
      else
        values = [answer['value'][locale],answer['other']].compact
      end
    else
      if options
        flag = false
        if answer.nil?
          values = options.map{|name,id| ''}
        else
          values = options.collect do |name,id| 
            flag = (name==answer)
            if flag
              chart_data[name] ||= 0
              chart_data[name] += 1
            end
            convert_bool_to_exel_value(flag)
          end
        end
        if !flag
          if use_custom_option
            values << answer
          end
          chart_data[@use_custom_option_title] ||= 0
          chart_data[@use_custom_option_title] += 1
        elsif use_custom_option
          values << ''
        end
      else
        values = [answer]
      end
    end
    values
  end

  def self.parse_exel_checkbox_value(answers,xargs)
    locale = xargs[:locale]
    locale = self.get_locale(locale)
    options = xargs[:options]
    chart_data = xargs[:chart_data]
    use_custom_option = xargs[:use_custom_option]
    answers = Array(answers)
    no_value_flag = true
    values = options.collect do |name,id|
      flag = false
      answers.each_with_index do |answer,i|
        case answer
        when BSON::Document
          flag = (id==answer['oid'])
        else
          flag = (name==answer)
        end
        if flag
          no_value_flag = false
          chart_data[name] ||= 0
          chart_data[name] += 1
          answers.delete_at(i)
          break
        end
      end
      convert_bool_to_exel_value(flag)
    end
    if use_custom_option
      if no_value_flag
        chart_data[@use_custom_option_title] ||= 0
        chart_data[@use_custom_option_title] += 1
      end
      values << answers.join(',')
    end
    values
  end

  def self.parse_exel_rg_value(answers,xargs)
    locale = xargs[:locale]
    locale = self.get_locale(locale)
    options = xargs[:options]
    chart_data = xargs[:chart_data]
    use_custom_option = xargs[:use_custom_option]
    radiogroups = xargs[:radiogroups]

    values = []
    options.each do |name,opt_id|
      chart_data[opt_id] ||= {}
      answer = answers.blank? ? nil : answers[opt_id] 
      radiogroups.each do |rg_name,rg_id|
        flag = (answer.class == BSON::Document && answer['rgid']==rg_id) || (answer == rg_name)
        values << self.convert_bool_to_exel_value(flag)
        if flag
          chart_data[opt_id][rg_name] ||= 0
          chart_data[opt_id][rg_name] += 1
        end
      end
    end
    if use_custom_option
      values << answers["custom_option"].to_s
    end
    values
  end

  def self.parse_double_level_value(answer,other_title,locale=nil)
    locale = self.get_locale(locale)
    case answer
    when BSON::Document
      level1 = answer['level1'][locale]
      level2 = answer['level2'].collect{|v| v[locale]}.join(', ')
      other = answer['other'].blank? ? '' : ", #{level1}-#{other_title}: #{answer['other']}"
      "#{level1}: #{level2}#{other}"
    else
      answer
    end
  end
  
  def self.parse_exel_double_level_value(answers,xargs)
    other_title = xargs[:other_title]
    use_custom_option = xargs[:use_custom_option]
    locale = xargs[:locale]
    chart_data = xargs[:chart_data]
    locale = self.get_locale(locale)
    values = []
    custom_option_value = nil
    answers.each do |answer|
      case answer
      when BSON::Document
        level1 = answer['level1'][locale]
        chart_data[level1] ||= {value: 0,children: {}}
        chart_data[level1][:value] += 1
        level2 = answer['level2'].collect do |v|
          tmp = v[locale]
          chart_data[level1][:children][tmp] ||= 0
          chart_data[level1][:children][tmp] += 1
          tmp
        end.join(', ')
        other = answer['other'].blank? ? '' : ", #{level1}-#{other_title}: #{answer['other']}"
        values << "#{level1}: #{level2}#{other}"
      else
        custom_option_value = answer
      end
    end
    values = [values.join("\r\n")]
    if use_custom_option
      chart_data[other_title] ||= {value: 0,children: {}}
      chart_data[other_title][:value] += 1
      chart_data[other_title][:children][other_title] ||= 0
      chart_data[other_title][:children][other_title] += 1
      values << custom_option_value
    end
    values
  end

  def self.generate_xlsx(id,locale)
    def self.remove_illegal_utf8(str)
      if String.method_defined?(:encode)
        str.encode!('UTF-8', 'UTF-8', :invalid => :replace)
      else
        ic = Iconv.new('UTF-8', 'UTF-8//IGNORE')
        str = ic.iconv(str)
      end
      str
    end
    I18n.with_locale(locale) do
      survey = QuestionnaireSurvey.find(id)
      puts survey.inspect
      chart_data, survey_questions, survey_answers = survey.generate_chart_data
      ac = ActionController::Base.new()
      xlsx = ac.render_to_string handlers: [:axlsx],
                                 formats: [:xlsx],
                                 template: "survey_export/export",
                                 locals: {survey: survey,
                                          survey_questions: survey_questions,
                                          survey_answers: survey_answers,
                                          }
      dirname = "public/uploads/survey_export/#{id}"
      FileUtils.mkdir_p(dirname) unless File.exists?(dirname)
      f = "#{dirname}/#{survey.title.gsub(/[ "'*@#$%^&()+=;:.,?>|\\\/<~_!：，、。！？；「」〈〉【】／]/,'')}.xlsx"
      file = File.open(f, "w")
      xlsx.force_encoding("utf-8")
      file.write(xlsx)
      puts 'success'
    end
  end
end