# Copyright (c) 2008 Brendan G. Lim (brendan@intridea.com)
#
# 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.

module MobileFu
  module MobilizedStyles

    # This logic was taken from Michael Bleigh's browserized styles
    # with modification to work for mobile browsers.

    def user_agent_device_name
      @user_agent_device_name ||= begin

        ua = request.user_agent
        return nil if ua.nil?
        ua.downcase!

        if ua.index('mobileexplorer') || ua.index('windows ce')
          'mobileexplorer'
        elsif ua.index('blackberry')
          'blackberry'
        elsif ua.index('iphone') || ua.index('ipod')
          'iphone'
        elsif ua.index('ipad')
          'ipad'
        elsif ua.index('android')
          'android'
        elsif ua.index('nokia')
          'nokia'
        elsif ua.index('palm')
          'palm'
        end
      end
    end

    def stylesheet_link_tag_with_mobilization(*sources)
      mobilized_sources = Array.new
      sources.each do |source|
        subbed_source = source.to_s.gsub ".css",""

        possible_sources = ["#{subbed_source.to_s}_#{user_agent_device_name}"]

        mobilized_sources << source

        for possible_source in possible_sources
          path = File.join config.stylesheets_dir, "#{possible_source}.css"
          sass_path = File.join config.stylesheets_dir, "sass", "#{possible_source}.sass"
          mobilized_sources << possible_source if File.exist?(path) || File.exist?(sass_path)
        end
      end

      stylesheet_link_tag_without_mobilization *mobilized_sources
    end
  end
end

ActionView::Base.send :include, MobileFu::MobilizedStyles
ActionView::Base.send :alias_method_chain, :stylesheet_link_tag, :mobilization