module Onering
  module CLI
    module Report
      def self.configure(global={})
        @api = (Onering::CLI.connect(global.merge({
          :autoconnect => false
        })) rescue nil)

        @opts = ::Trollop::options do
          banner <<-EOS
Generate a system report that can be saved or submitted to a Onering server

Usage:
    onering [global] report [options]

Options:
EOS
          opt :id,             "Override the autodetected Hardware ID for this node", :short => '-I', :type => :string
          opt :fields,         "Set the named FIELD to equal VALUE in the format FIELD=VALUE. Can be specified multiple times", :short => '-o', :type => :string, :multi => true
          opt :save,           "Save the report output to the configured Onering server"
          opt :timeout,        "The maximum amount of time to wait for a report to be generated", :type => :integer, :default => 60
          opt :plugin_timeout, "The maximum amount of time to wait for a report plugin to return data", :type => :integer, :default => 10
        end

      # initialize report generator with user options
        Onering::Reporter.setup({
          :id             => @opts[:id],
          :timeout        => @opts[:timeout],
          :plugin_timeout => @opts[:plugin_timeout]
        }.compact)
      end

      def self.run(args)
        begin
          Onering::Logger.debug("Gathering local data for report")
          report = Onering::Reporter.report().stringify_keys()

        # pull report overrides from the config file
          Onering::Config.get('reporter.fields',{}).each do |key, value|
            Onering::Logger.debug("Override value #{key} from config file")

            if value.is_a?(Hash)
              value.coalesce(key, nil, '.').each do |k,v|
                v = nil if ['null', '', '-'].include?(v.to_s.strip.chomp)
                report = report.set(k, v)
              end
            else
              value = nil if ['null', '', '-'].include?(value.to_s.strip.chomp)
              report = report.set(key, value)
            end
          end

        # pull overrides from CLI arguments
          @opts[:fields].each do |field|
            key, value = field.split('=', 2)
            Onering::Logger.debug("Override value #{key} from command line argument")

            value = nil if ['null', '', '-'].include?(value.to_s.strip.chomp)
            report = report.set(key, value)
          end


        # save if specified
          if @opts[:save] === true
            @api.connect()
            @api.devices.save(report['id']) do
              MultiJson.dump(report)
            end
          end

          return report
        rescue Timeout::Error
          Onering::Logger.fatal!("Report took too long to generate, exiting...")
        end
      end
    end
  end
end