module ApplicationHelper

  def column_header(controller, param_key, title, sort_key)
    s = params[param_key].scan(/([a-z]+)(-?)\.?/)
    header = sort_key
    if s[0][0] == sort_key
      header += ((s[0][1] == "") ? "-" : "")
      if s[1] then header += ("." + s[1][0] + s[1][1]); end
    else
      header += ("." + s[0][0] + s[0][1])
    end
    content_tag('td',
      link_to(title, :controller => controller, param_key => header),
      (s[0][0] == sort_key) ? { :class => 'skey' } : nil)
  end

  def client_header(title, sort_key)
    column_header("client", :csort, title, sort_key)
  end

  def media_header(title, sort_key)
    column_header("media", :msort, title, sort_key)
  end

  def pool_header(title, sort_key)
    column_header("pool", :psort, title, sort_key)
  end

  def job_header(title, sort_key)
    column_header("job", :jsort, title, sort_key)
  end

  def pretty_key(key)
    key = key.downcase
    oops = {
      'uname' => 'Unix Name',
      'numvols' => 'Number of Volumes',
      'volumename' => 'Volume Name',
      'voluseduration' => 'Volume Use Duration',
    }
    return oops[key] if oops[key]

    s = key.dup
    s.gsub!(/^vol/, 'Volume ')
    s.gsub!(/poolid/, ' Pool Id')
    s.gsub!(/maxvol/, 'Maximum Volume')
    s.gsub!(/^(media|storage|label|job|migration|pool|client|use|accept|first|end)/, '\1 ')
    s.gsub!(/(time|base|id|retention|files?|bytes?|jobs?|written|changer|volume)$/, ' \1')
    s.split(' ').map{|s| s.capitalize}.join(' ')
  end

  def pretty_val(key, val)
    case key.downcase
    when 'jobtdate', 'volsessiontime'
      val == 0 ? 'None' : Time.at(val)
    when 'type'
      type_name(val).capitalize
    when 'level'
      level_name(val).capitalize
    when 'jobstatus'
      status_name(val).capitalize
    when /retention/
      (val / 86400).to_s + ' days'
    when /bytes/
      number_to_human_size(val)
    else
      val.is_a?(Fixnum) ? number_with_delimiter(val) : val
    end
  end

  def day_names
    [ [ "day", "1" ], [ "week", "7" ], [ "month", "35"], [ "year", "372"],
      [ "All dates", "0" ] ]
  end

  def job_names
    jn = Job.find(:all, :order=>'name', :select=>'distinct Name,Type')
    jn.delete_if { |job| job.type != 'B' }
    jn.map { |job| [ job.name, job.name ] }.unshift([ "All jobs", "0" ])
  end

  def selection(hash, key, choices, selected=nil)
    content_tag("select", 
      options_for_select(choices, selected),
      :id=>"#{hash}_#{key}", :name=>"#{hash}[#{key}]")
  end

end