#
# Author:: Nicolas DUPEUX (<nicolas.dupeux@arkea.com>)
# Copyright:: Copyright (c) Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require_relative "text_formatter"
require_relative "generic_presenter"

class Chef
  class Knife
    module Core

      # A customized presenter for Chef::Node objects. Supports variable-length
      # output formats for displaying node data
      class StatusPresenter < GenericPresenter

        def format(data)
          if parse_format_option == :json
            summarize_json(data)
          else
            super
          end
        end

        def summarize_json(list)
          result_list = []
          list.each do |node|
            result = {}

            result["name"] = node["name"] || node.name
            result["chef_environment"] = node["chef_environment"]
            ip = (node["cloud"] && node["cloud"]["public_ipv4_addrs"]&.first) || node["ipaddress"]
            fqdn = (node["cloud"] && node["cloud"]["public_hostname"]) || node["fqdn"]
            result["ip"] = ip if ip
            result["fqdn"] = fqdn if fqdn
            result["run_list"] = node.run_list if config["run_list"]
            result["ohai_time"] = node["ohai_time"]
            result["platform"] = node["platform"] if node["platform"]
            result["platform_version"] = node["platform_version"] if node["platform_version"]

            if config[:long_output]
              result["default"]   = node.default_attrs
              result["override"]  = node.override_attrs
              result["automatic"] = node.automatic_attrs
            end
            result_list << result
          end

          Chef::JSONCompat.to_json_pretty(result_list)
        end

        # Converts a Chef::Node object to a string suitable for output to a
        # terminal. If config[:medium_output] or config[:long_output] are set
        # the volume of output is adjusted accordingly. Uses colors if enabled
        # in the ui object.
        def summarize(list)
          summarized = ""
          list.each do |data|
            node = data
            # special case clouds with their split horizon thing.
            ip = (node[:cloud] && node[:cloud][:public_ipv4_addrs] && node[:cloud][:public_ipv4_addrs].first) || node[:ipaddress]
            fqdn = (node[:cloud] && node[:cloud][:public_hostname]) || node[:fqdn]
            name = node["name"] || node.name

            if config[:run_list]
              if config[:long_output]
                run_list = node.run_list.map { |rl| "#{rl.type}[#{rl.name}]" }
              else
                run_list = node["run_list"]
              end
            end

            line_parts = []

            if node["ohai_time"]
              hours, minutes, seconds = time_difference_in_hms(node["ohai_time"])
              hours_text = "#{hours} hour#{hours == 1 ? " " : "s"}"
              minutes_text = "#{minutes} minute#{minutes == 1 ? " " : "s"}"
              seconds_text = "#{seconds} second#{seconds == 1 ? " " : "s"}"
              if hours > 24
                color = :red
                text = hours_text
              elsif hours >= 1
                color = :yellow
                text = hours_text
              elsif minutes >= 1
                color = :green
                text = minutes_text
              else
                color = :green
                text = seconds_text
              end
              line_parts << @ui.color(text, color) + " ago" << name
            else
              line_parts << "Node #{name} has not yet converged"
            end

            line_parts << fqdn if fqdn
            line_parts << ip if ip
            line_parts << run_list.to_s if run_list

            if node["platform"]
              platform = node["platform"].dup
              if node["platform_version"]
                platform << " #{node["platform_version"]}"
              end
              line_parts << platform
            end

            summarized = summarized + line_parts.join(", ") + ".\n"
          end
          summarized
        end

        def key(key_text)
          ui.color(key_text, :cyan)
        end

        # @private
        # @todo this is duplicated from StatusHelper in the Webui. dedup.
        def time_difference_in_hms(unix_time)
          now = Time.now.to_i
          difference = now - unix_time.to_i
          hours = (difference / 3600).to_i
          difference %= 3600
          minutes = (difference / 60).to_i
          seconds = (difference % 60)
          [hours, minutes, seconds]
        end

      end
    end
  end
end
