graduation_subitems = @graduation_subitems
graduation_standards = @graduation_standards
standards_size = graduation_standards.size
support_map = @subitem_support_standards.group_by do |support|
  [support.ec_requirement_standard_id, support.ec_graduation_subitem_id]
end

ec_year = @_current_year
major = ec_year.ec_major_school.ec_major

wb = xlsx_package.workbook
wb.styles do |style|
  title_style = style.add_style(sz: 18, height: 22, b: true)
  ec_year_style = style.add_style(sz: 10, height: 14)
  note_style = style.add_style(sz: 11, height: 14, color: 'FF5500')
  label_style = style.add_style(sz: 11, b: true, bg_color: '90EE90', alignment: { horizontal: :center })
  content_style = style.add_style(sz: 11, height: 16, border: { style: :thin, color: '000000' })

  wb.add_worksheet(:name => '毕业要求对通用标准的支撑') do |sheet|
    sheet.add_row '毕业要求 vs 通用标准矩阵', style: title_style

    sheet.merge_cells wb.rows.first.cells[(1..standards_size)]

    sheet.add_row []

    sheet.add_row ['专业代码', major.code], style: ec_year_style
    sheet.add_row ['专业名称', major.name], style: ec_year_style
    sheet.add_row ['学年', "#{ec_year.year}学年"], style: ec_year_style

    sheet.add_row ['注：“√” 表示有对应关系'], style: note_style

    objectives = standards_size.times.map { |index| "标准#{index + 1}" }
    sheet.add_row objectives.unshift('毕业要求指标点\通用标准'), style: label_style

    graduation_subitems.each do |graduation|
      data =
        graduation_standards.map do |standard|
          support_map[[standard.id, graduation.id]].present? ? '√' : ''
        end

      data.unshift("指导点#{graduation.ec_graduation_requirement.position}-#{graduation.position}")
      sheet.add_row data, style: ([content_style] * standards_size).unshift(label_style)
    end
  end
end