__________________________________________________________________
|  DC   | Services |______________Instances________________| Nodes |
|       |          | Passing | Warning | Critic  |  Total  |       |
|-------+----------+---------+---------+---------+---------+-------|
<%
  # This template list all instances on all DCs
  # And aggregates a list of Services, Services Instances/status
  # And nodes.
  require 'set'


  def find_best_agent_for_dc(dc)
    agent = service('consul-relay', passing: true, dc:dc).first
    agent = service('consul-agent-http', passing: true, dc:dc).first unless agent
    service('consul', passing: true, dc:dc).first unless agent
    return nil unless agent
    port = agent['Service']['Port'] || 8500
    "http://#{agent.service_address}:#{port}"
  end

  # Services to hide
  services_blacklist_raw = (ENV['EXCLUDE_SERVICES'] || '.*netsvc-probe.*,.*consul-probed.*').split(',')
  services_blacklist = services_blacklist_raw.map { |v| Regexp.new(v) }

  num_services={}
  num_instances={}
  all_states = ['passing', 'warning', 'critical', 'total']
  distinct_services=Set.new
  datacenters().each do |dc|
    next unless find_best_agent_for_dc(dc)
    num_services[dc] = 0
    num_instances[dc] = {
      'passing'  => 0,
      'warning'  => 0,
      'critical' => 0,
      'total'    => 0
    }
    services(dc:dc, agent: find_best_agent_for_dc(dc)).each do |service_name, tags|
      next if services_blacklist.any? {|r| r.match(service_name)}
      distinct_services.add(service_name)
      num_services[dc]+=1
      service(service_name, dc:dc, agent: find_best_agent_for_dc(dc)).each do |snode|
        num_instances[dc][snode.status]+=1
        num_instances[dc]['total']+=1
      end 
    end
  end
  num_instances_total={
    'passing'  => 0,
    'warning'  => 0,
    'critical' => 0,
    'total'    => 0
  }
  num_nodes_total=0
  num_services.each do |dc, num_services_for_dc|
    all_states.each do |s|
      num_instances_total[s] += num_instances[dc][s]
    end
    num_nodes=nodes(dc:dc, agent: find_best_agent_for_dc(dc)).count
    num_nodes_total+=num_nodes
%>| <%= dc.rjust(5) %> | <%= num_services_for_dc.to_s.rjust(8) %> |<% all_states.each do |status|
%> <%= num_instances[dc][status].to_s.rjust(7) %> |<% end %> <%= num_nodes.to_s.rjust(5) %> |
<%
  end
%>|-------+----------+---------+---------+---------+---------+-------|
| TOTAL | <%= distinct_services.count.to_s.rjust(8) %> |<% all_states.each do |status|
%> <%= num_instances_total[status].to_s.rjust(7) %> |<%
end %> <%= num_nodes_total.to_s.rjust(5) %> |
'_______|__________|_________|_________|_________|_________|_______'