wb = xlsx_package.workbook

header = wb.styles.add_style :b => true, :bg_color => Stylesheet.primary.upcase.gsub('#', 'FF'), :fg_color => 'FFFFFFFF'
date = wb.styles.add_style :format_code => Rails.application.secrets.excel_date_format

wb.add_worksheet(name: t('export_members.members')) do |sheet|

  ## data table
  # heading labels
  columns = [t('export_members.id'), t('export_members.surname'), t('export_members.first_name'), t('export_members.email'),
             t('export_members.gender'), t('export_members.age'), t('export_members.phone'), t('export_members.group'),
             t('export_members.subscription'), t('export_members.subscription_end_date'), t('export_members.validated_trainings')]
  sheet.add_row columns, :style => header

  # data rows
  @members.each do |member|
    data = [
        member.id,
        member.profile.last_name,
        member.profile.first_name,
        member.email,
        member.profile.gender ? t('export_members.man') : t('export_members.woman'),
        member.profile.age,
        member.profile.phone,
        member.group.name,
        (member.subscription and member.subscription.expired_at > Time.now) ? member.subscription.plan.name : t('export_members.without_subscriptions'),
        (member.subscription and member.subscription.expired_at > Time.now) ? member.subscription.expired_at.to_date : nil,
        member.trainings.map(&:name).join("\n")
    ]
    styles = [nil, nil, nil, nil, nil, nil, nil, nil, nil, date, nil]
    types = [:integer, :string, :string, :string, :string, :integer, :string, :string, :string, :date, :string]

    sheet.add_row data, :style =>  styles, :types => types
  end
end