# Copyright (C) 2011 RightScale, Inc, All Rights Reserved Worldwide.
#
# THIS PROGRAM IS CONFIDENTIAL AND PROPRIETARY TO RIGHTSCALE
# AND CONSTITUTES A VALUABLE TRADE SECRET. Any unauthorized use,
# reproduction, modification, or disclosure of this program is
# strictly prohibited. Any use of this program by an authorized
# licensee is strictly subject to the terms and conditions,
# including confidentiality obligations, set forth in the applicable
# License Agreement between RightScale.com, Inc. and
# the licensee

require 'yaml'

module RightConf

  class Profile

    include Singleton

    # Load profile from disk on instantiation
    def initialize
      if File.exist?(profile_path)
        @profile = YAML.load(IO.read(profile_path)) rescue {}
        @profile = {} unless @profile.is_a?(Hash)
      else
        @profile = {}
      end
    end

    # Retrieve persisted configurator signature
    #
    # === Return
    # signature(String):: Persisted configurator signature
    def configurator_signature(key)
      sigs = @profile[:configurator_signatures]
      signature = sigs && sigs[key]
    end

    # Set signature for given configurator
    #
    # === Parameters
    # key(String):: Configurator key
    # signature(String):: Persisted configurator signature
    #
    # === Return
    # true:: Always return true
    def set_configurator_signature(key, signature)
      @profile[:configurator_signatures] ||= {}
      @profile[:configurator_signatures][key] = signature
      persist
      true
    end

    # Entire profile with all settings
    #
    # === Return
    # profile(Hash):: Profile settings
    def profile
      @profile
    end

    protected

    # Retrieve profile file path
    #
    # === Return
    # path(String):: Profile file path
    def profile_path
      profile_path = ENV['RCONF_PROFILE'] || File.join(ENV['HOME'], '.rconf')
    end

    # Persist profile to file
    #
    # === Return
    # true:: Always return true
    def persist
      File.open(profile_path, 'w') { |f| f.puts YAML.dump(@profile) } unless @profile.nil?
    end

  end
end