require 'noumenon/version'
require 'noumenon/string_extensions'
require 'facets'
require 'rack/builder'

# @api public
module Noumenon
  autoload :AssetRepository, 'noumenon/asset_repository'
  autoload :Core, 'noumenon/core'
  autoload :ContentRepository, 'noumenon/content_repository'
  autoload :Template, 'noumenon/template'
  autoload :Theme, 'noumenon/theme'
  autoload :Spec, 'noumenon/spec'
  
  # Starts Noumenon serving, this will usually be called from a config.ru file
  # something like this:
  #
  #   Noumenon.content_repository = Noumenon::Repository::FileSystem.new("/home/noumenon/content")
  #   Noumenon.theme = Noumenon::Theme.load("/home/noumenon/theme")
  #
  #   run Noumenon.server
  #
  # While you can also just use an instance Noumenon::Core, keep in mind that it won't
  # have the full Rack middleware stack, and so some functionality such as serving assets 
  # from themes won't be available.
  #
  # @api public
  # @return [ Rack::Builder ] the Rack stack to serve a Noumenon site
  def self.server
    Rack::Builder.new do
      use Noumenon::Theme::AssetsMiddleware
      run Noumenon::Core
    end
  end
  
  # Returns the current content repository.
  #
  # @api public
  # @return [ Noumenon::Repository, #get, #put ]
  def self.content_repository
    @content_repository
  end
    
  # Sets the repository to load site content from.
  #
  # @api public
  # @param [ Noumenon::Repository, #get, #put ] repository the repository to use
  def self.content_repository=(repository)
    @content_repository = repository
  end

  # Returns the current asset repository. If one hasn't been set then the content repository will be returned.
  #
  # @api public
  # @return [ Noumenon::Repository, #get_asset, #save_asset ]
  def self.asset_repository
    @asset_repository || content_repository
  end

  # Sets the current asset repository. If you want to return to using the default content repository set to nil.
  #
  # @api public
  # @param [ Noumenon::Repository, #get_asset, #save_asset ] repository The repository to use for assets.
  def self.asset_repository=(repository)
    @asset_repository = repository
  end

  # Returns the current theme
  #
  # @api public
  # @return [ Noumenon::Theme ] the current theme
  def self.theme
    @theme
  end
  
  # Set the current theme.
  #
  # If provided with a [ Noumenon::Theme ] object then it will set that, otherwise
  # it will convert the argument to a string, and attempt to find a loaded theme with
  # that name.
  #
  # @api public
  # @param [ Noumenon::Theme, #to_s ] theme either a theme object, or the name of a loaded theme
  # @return [ Noumenon::Theme, nil ] the specified theme, or nil if it could not be found
  def self.theme=(theme)
    if theme.is_a? Noumenon::Theme
      @theme = theme
    else
      raise ArgumentError.new("The theme '#{theme}' has not been loaded.") unless Noumenon::Theme.themes.key?(theme)
      self.theme = Noumenon::Theme.themes[theme]
    end
    
    @theme
  end
end