# Patches for the 'more' plugin which adds LessCSS Support to Rails
# We need more to be able to load stylesheets from app/stylesheets in
# each extension then write them to the same destination. Where stylesheets
# of the same name exist in different extensions, the file in the last
# extension to be loaded takes precedence allowing them to be overriden
# in the same manner as views

#RAILS3 TODO - deal with extension load path and whether or not we even need the More stuff
# class Less::More
# 
#   class << self
# 
#     def source_paths
#       @source_paths || [source_path]
#     end
#     def source_paths=(paths_array)
#       @source_paths = paths_array.map{|p| Pathname.new(p.to_s)}
#     end
# 
#     # Override because this method would only generate if .css file didnt exist for path_as_array
#     # and we want to force re-compilation of a less file, overwriting css
#     def generate(path_as_array)
#       source = pathname_from_array(path_as_array)
#       if source.extname == ".css"
#         css = File.read(source)
#       else
#         css = generate_css(source)
#       end
#       css
#     end
# 
#     def generate_css(source)
#       engine = File.open(source) {|f| Less::Engine.new(f) }
#       css = engine.to_css
#       css.delete!("\n") if self.compression?
#       css = (HEADER % [source.to_s]) << css if self.header?
#       css
#     end
# 
# 
#     # If .less file, compile CSS for same directory as a cache
#     def compile(path_as_array)
#       source = pathname_from_filename(path_as_array.to_s + '.less')
#       return if source.nil?
#       unless source.extname == ".css"
#         destination = Pathname.new(source.to_s.gsub(/.less$/, '.css'))
# 
#         if !File.exists?(destination) || source.mtime > destination.mtime
#           css = Less::More.generate_css(source)
#           if page_cache?
#             File.open(destination, "w") {|f|
#               f.puts css
#             }
#           end
#         end
#       end
#     end
# 
# 
#     # Array of Pathname instances for all the less source files.
#     def all_less_files
#       #Dir[Less::More.source_path.join("**", "*.{css,less,lss}")].map! {|f| Pathname.new(f) }
#       source_paths.map do |pathname|
#         all_less_files_in_path(pathname)
#       end.flatten
#     end
# 
#     def all_less_files_in_path(pathname)
#       Dir[pathname.join("**", "*.{css,less,lss}").to_s].map! {|f| Pathname.new(f) }
#     end
# 
# 
#     # Generates all the .css files.
#     # Override to iterate through all source paths
#     def parse
#       source_paths.reverse.each do |source_path|
#         Less::More.all_less_files_in_path(source_path).each do |path|
#           # Get path
#           relative_path = path.relative_path_from(source_path)
#           path_as_array = relative_path.to_s.split(File::SEPARATOR)
#           path_as_array[-1] = File.basename(path_as_array[-1], File.extname(path_as_array[-1]))
# 
#           # Generate CSS
#           css = Less::More.generate(path_as_array)
# 
#           # Store CSS
#           path_as_array[-1] = path_as_array[-1] + ".css"
#           destination = Pathname.new(Rails.root.join("public", Less::More.destination_path)).join(*path_as_array)
#           destination.dirname.mkpath
# 
#           File.open(destination, "w") {|f|
#             f.puts css
#           }
#         end
#       end
#     end
# 
#     # Override to look in each of the source paths. Return pathname for first source path that contains this file
#     def pathname_from_array(array)
#       path_spec = array.dup
#       path_spec[-1] = path_spec[-1] + ".{css,less,lss}"
#       self.source_paths.map do |source_path|
#         Pathname.glob(File.join(source_path.to_s, *path_spec))[0]
#       end.compact.first
#     end
# 
#     # Find pathname for specific filename in each of the source paths
#     def pathname_from_filename(filename)
#       self.source_paths.map do |source_path|
#         Pathname.glob(File.join(source_path.to_s, filename))[0]
#       end.compact.first
#     end
# 
#   end
# 
# end
# 
# $LESS_LOAD_PATH = Less::More.source_paths = Spree::ExtensionLoader.stylesheet_source_paths.reverse