#
# Copyright 2013-2017 Conjur Inc
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of
# this software and associated documentation files (the "Software"), to deal in
# the Software without restriction, including without limitation the rights to
# use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
# the Software, and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
# FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
# COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
# IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
require 'conjur/variable'

module Conjur
  class API
  
    #@!group Variables

    # Fetch the values of a list of variables.  This operation is more efficient than fetching the
    # values one by one.
    #
    # This method will fail unless:
    #   * All of the variables exist
    #   * You have permission to `'execute'` all of the variables
    #
    # @example Fetch multiple variable values
    #   values = variable_values ['myorg:variable:postgres_uri', 'myorg:variable:aws_secret_access_key', 'myorg:variable:aws_access_key_id']
    #   values # =>
    #   {
    #      "postgres://...",
    #      "the-secret-key",
    #      "the-access-key-id"
    #   }
    # 
    # This method is used to implement the {http://developer.conjur.net/reference/tools/utilities/conjurenv `conjur env`}
    # commands.  You may consider using that instead to run your program in an environment with the necessary secrets.
    #
    # @param [Array<String>] variable_ids list of variable ids to fetch
    # @return [Array<String>] a list of variable values corresponding to the variable ids.
    # @raise [RestClient::Forbidden, RestClient::ResourceNotFound] if any of the variables don't exist or aren't accessible.
    def variable_values variable_ids
      raise ArgumentError, "Variables list must be an array" unless variable_ids.kind_of? Array 
      raise ArgumentError, "Variables list is empty" if variable_ids.empty?
      
      opts = "?variable_ids=#{variable_ids.map { |v| fully_escape(v) }.join(',')}"
      
      response =
        RestClient::Resource.
          new(Conjur.configuration.core_url,credentials)['secrets'+opts].get
      
      return JSON.parse(response.body) 
    end
    
    #@!endgroup
  end
end