class RTUI::Table

def initialize(title, items, *fields)
  @title = title
  @items = items
  @fields = fields
end

def print
  return if @items.empty?
  puts @title
  #find max length for each field; start with the field names themselves
  @fields = @items.first.class.column_names unless @fields.any?
  max_len = Hash[*@fields.map {|f| [f, f.to_s.length]}.flatten]
  @items.each do |item|
    @fields.each do |field|
      len = item.send(field).to_s.length
      max_len[field] = len if len > max_len[field]
    end
  end
  border = '+-' + @fields.map {|f| '-' * max_len[f] }.join('-+-') + '-+'
  title_row = '| ' + @fields.map do |f|
    sprintf("%-#{max_len[f]}s", f.to_s.split("_")[0].capitalize)
  end.join(' | ') + ' |'
  puts border
  puts title_row
  puts border
  @items.each do |item|
    row = '| ' + @fields.map do |f|
      sprintf("%-#{max_len[f]}s", item.send(f))
    end.join(' | ') + ' |'
    puts row
  end
  puts border
  puts "#{@items.length} items\n"
end