require 'wright/resource'
require 'wright/dsl'

module Wright
  class Resource
    # Group resource, represents a group.
    #
    # @example
    #   admins = Wright::Resource::Group.new('admins', members: ['root'])
    #   admins.create
    # @todo Use GnuPasswd provider on all GNU-flavoured systems
    class Group < Wright::Resource
      # @return [Array<String>] the group's intended members
      attr_accessor :members

      # @return [Integer] the group's intended group id
      attr_accessor :gid

      # @return [Bool] true if the group should be a system
      #   group. Ignored if {#gid} is set.
      attr_accessor :system

      # Initializes a Group.
      #
      # @param name [String] the group's name
      # @param args [Hash] the arguments
      # @option args [Symbol] :action (:create) the action
      # @option args [Array<String>] :members the group's members
      # @option args [Integer] :gid the group's gid
      # @option args [Bool] :system (false) denotes whether the group
      #   should be a system group or not
      def initialize(name, args = {})
        super
        @action  = args.fetch(:action, :create)
        @members = args.fetch(:members, nil)
        @gid     = args.fetch(:gid, nil)
        @system  = args.fetch(:system, false)
      end

      # Creates or updates the group.
      #
      # @return [Bool] true if the group was updated and false
      #   otherwise
      def create
        might_update_resource do
          provider.create
        end
      end

      # Removes the group.
      #
      # @return [Bool] true if the group was updated and false
      #   otherwise
      def remove
        might_update_resource do
          provider.remove
        end
      end
    end
  end
end

Wright::DSL.register_resource(Wright::Resource::Group)

group_providers = {
  'debian' => 'Wright::Provider::Group::GnuPasswd',
  'fedora' => 'Wright::Provider::Group::GnuPasswd',
  'rhel'   => 'Wright::Provider::Group::GnuPasswd',
  'osx'    => 'Wright::Provider::Group::DarwinDirectoryService'
}
Wright::Config[:resources][:group] ||= {}
Wright::Config[:resources][:group][:provider] ||=
  group_providers[Wright::Util.os_family]