#
# Copyright (C) 2014 Conjur Inc
#
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# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
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# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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require 'conjur/command/dsl_command'

require 'etc'
require 'socket'

class Conjur::Command::Policy < Conjur::DSLCommand
  class << self
    def default_collection_user
      Etc.getlogin
    end
    
    def default_collection_hostname
      Socket.gethostname
    end
  
    def default_collection_name
      [ default_collection_user, default_collection_hostname ].join('@')
    end
  end

  desc "Manage policies"
  command :policy do |policy|
    policy.desc "Load a policy from Conjur DSL"
    policy.long_desc <<-DESC
This method is EXPERIMENTAL and subject to change

Loads a Conjur policy from DSL, applying particular conventions to the role and resource
ids.

The first path element of each id is the collection. Policies are separated into collections
according to software development lifecycle. The default collection for a policy is $USER@$HOSTNAME,
in other words, the username and hostname on which the policy is created. This is approriate for
policy development and local testing. Once tested, policies can be created in more official
environments such as ci, stage, and production.

The second path element of each id is the policy name and version, following the convention
policy-x.y.z, where x, y, and z are the semantic version of the policy.

Next, each policy creates a policy role and policy resource. The policy resource is used to store
annotations on the policy. The policy role becomes the owner of the owned policy assets. The
--as-group and --as-role options can be used to set the owner of the policy role. The default
owner of the policy role is the logged-in user (you), as always.
    DESC
    policy.arg_name "(policy-file | STDIN)"
    policy.command :load do |c|
      acting_as_option(c)

      c.desc "Policy collection, defaulting to $USER@$HOSTNAME"
      c.arg_name "collection"
      c.flag [:collection]

      c.desc "Load context from this config file, and save it when finished. The file permissions will be 0600 by default."
      c.arg_name "context"
      c.flag [:c, :context]

      c.action do |global_options,options,args|
        collection = options[:collection] || default_collection_name

        run_script args, options do |runner, &block|
          runner.scope collection do
            block.call
          end
        end
      end
    end
  end
end