##
 # Provide an icons attribute on the site object
 
 require 'yaml'
 require 'forwardable'
 
 module Jekyll
 
   class Icon
 
     attr_reader :name, :id, :unicode, :created, :categories
 
     def initialize(icon_object)
       @icon_object = icon_object
 
       # Class name used in CSS and HTML
       @icon_object['class'] = icon_object['id']
       # Normalize the aliases
       @icon_object['aliases'] ||= []
 
       @name = icon_object['name']
       @id = icon_object['id']
       @class = icon_object['class']
       @aliases = icon_object['aliases']
       @unicode = icon_object['unicode']
       @created = icon_object['created']
       @categories = icon_object['categories']
     end
 
     def to_liquid
       return @icon_object
     end
 
   end
 
   class IconList
     ##
     # A list of icons
     #
     include Enumerable
     extend Forwardable
 
     def_delegators :@icon_array, :each, :<<
 
     def initialize(icon_array)
       @original_icon_array = icon_array
       @icon_array = []
 
       icon_array.each { |icon_object|
         @icon_array << Icon.new(icon_object)
       }
     end
 
     def [](k)
       @icon_array[k]
     end
 
     def to_liquid
       @original_icon_array
     end
 
   end
 
   module IconFilters
     def expand_aliases(icons)
       expanded = []
 
       icons.each { |icon|
         # Remove the aliases since we are expanding them
         expanded << icon.reject{ |k| k == 'aliases'}
 
         icon['aliases'].each { |alias_id|
           alias_icon = expanded[-1].dup
           alias_icon['class'] = alias_id
           alias_icon['alias_of'] = icon
 
           expanded << alias_icon
         }
       }
 
       return expanded
     end
 
     def category(icons, cat)
       icons.select { |icon| icon['categories'].include?(cat) }
     end
 
     def version(icons, version)
       icons.select { |icon| icon['created'] == version }
     end
 
     def sort_by(icons, sort_key)
       icons.sort_by! { |icon| icon[sort_key] }
     end
   end
 
   Liquid::Template.register_filter(IconFilters)
 
   class Site
 
     attr_reader :icons
 
     def process
       self.reset_icons
       self.reset
       self.read
       self.generate
       self.render
       self.cleanup
       self.write
 
       self.build
     end
 
     ##
     # Reads the YAML file that stores all data about icons
     def reset_icons
       @icons = IconList.new(YAML.load_file(self.config['icon_meta'])['icons'])
     end
 
     ##
     # After generation, runs a build of Font-Awesome
     def build
       system("make build", :chdir => self.config['destination'], :out => :err)
     end
 
     def site_payload
       {
         "site"       => self.config.merge({
           "time"       => self.time,
           "posts"      => self.posts.sort { |a, b| b <=> a },
           "pages"      => self.pages,
           "html_pages" => self.pages.reject { |page| !page.html? },
           "categories" => post_attr_hash('categories'),
           "tags"       => post_attr_hash('tags')}),
         "icons"      => @icons,
       }
     end
 
   end
 
 end