module Onering
  module CLI
    module Devices
      def self.configure(global={})
        @api = Onering::CLI.connect(global).devices

        @opts = ::Trollop::options do
          banner <<-EOS
Options:
EOS

          opt :query, "The Onering urlquery to filter devices by", :short => '-f', :type => :string
          opt :id,    "The node ID of the device to operate on", :short => '-i', :type => :string

        # subcommands
          stop_on %w{show get set list find save}
        end
      end

      def self.run(args)
        sc = args.shift

        case (sc.downcase.to_sym rescue nil)
# -----------------------------------------------------------------------------
        when :show
          return @api.devices.show(args[0])

# -----------------------------------------------------------------------------
        when :get
          raise "Expected 1 parameter, got #{args.length}" unless args.length == 1

          if @opts[:query_given]
          # doing this until a bulk field query endpoint is built
            return @api.list('id', {
              :filter => @opts[:query]
            }).collect{|i| @api.get_field(i, args[0])}

          elsif @opts[:id_given]
            return @api.get_field(@opts[:id], args[0])

          end

# -----------------------------------------------------------------------------
        when :set
          raise "Expected 2 parameters, got #{args.length}" unless args.length == 2

          if @opts[:query]
          # doing this until a bulk field set endpoint is built
            return @api.list('id', {
              :filter => @opts[:query]
            }).collect{|i| @api.set_field(i, args[0])}

          elsif @opts[:id]
            return @api.set_field(@opts[:id], args[0], args[1])

          end

# -----------------------------------------------------------------------------
        when :list
          raise "Expected 1 parameter, got #{args.length}" unless args.length >= 1
          return @api.list(args[0], {
            :filter => [@opts[:query], args[1]].compact.join('/')
          }.compact)

# -----------------------------------------------------------------------------
        when :find
          raise "Expected 1 parameter, got #{args.length}" unless args.length == 1
          return @api.find(args[0])

# -----------------------------------------------------------------------------
        when :save
          rv = @api.save(args[0] || @opts[:id]) do
          # read from pipe
            if not STDIN.tty?
              STDIN.read

          # read from specified file
            elsif (File.readable?(args[1]) rescue false)
              File.read(args[1])

            else
              raise "Cannot save data, no input data specified"
            end
          end

          rv.parsed_response
        else
          raise "Unknown subcommand #{sc.inspect}"
        end
      end
    end
  end
end