Heartcheck.setup do |monitor|
  # monitor has a default logger but you can use yours
  # default value: Logger.new(STDOUT)
  # monitor.logger = Rails.logger

  # Services
  # For each service you can set the folling options
  #        name: String  => root name to show in report page (default: class.name)
  #  functional: Boolean => options to set if this service is optional (default: false)
  #    on_error: Block   => to customize the errors (default: nil)
  # to_validate: Block   => to validate the sevices (default: nil)
  #
  # See the exemple bellow to undertand how you can configure it.
  #
  # monitor.add :base do |c|
  #   c.name       = "filesystem"
  #   c.functional = true
  #   c.add_service(name: "my_file", path: "/var/www/my_project/my_file")
  #
  #   c.on_error do |sevices|
  #     errors << "Custom error message for #{service[:name]}"
  #   end
  #
  #   c.to_validate do |services, errors|
  #     services.each do |service|
  #       errors << "erro message" unless if File.exists?(service[:path])
  #     end
  #   end
  # end

  # Firewall
  # check with telnet if the firewall is open to conect to the service
  monitor.add :firewall do |c|
    # you can add service wth (host and port) or (url)
    c.add_service(host: 'lala.com', port: 80)
    c.add_service(url: 'http://lalal.com')

    # add dynamic services when you need it run after initializer
    c.register_dynamic_services do
      Pmta.all.map { |p| { host: p.host, port: 25 } }
    end

    # to customize default error message, the default is:
    # "connection refused on: #{service.host}:#{service.port}"
    # params
    # errors:  Array           => errors to show on page
    # service: FirewallService => object that respond to :host and :port
    c.on_error do |_errors, service|
      erros << "Custom error message for #{service.host}"
    end
  end

  # Redis
  # check if you redis conection is working
  # you need to send a redis conection as a service
  monitor.add :redis do |c|
    c.add_service(name: 'Redis', connection: Resque.redis)
  end

  # Cache
  # check if your cache is working
  # you can pass any kind of cache, but this need to respond to
  # set, get and delete
  monitor.add :cache do |c|
    c.add_service(name: 'memcached', connection: Rails.cache.instance_variable_get('@data'))
  end

  # WatchFile
  # check if a preloaded file as changed from the disk
  monitor.add :watch_file do |c|
    c.add_service(file: 'version.json')
  end
end