module Sinatra
  module Twitter
    module Bootstrap

      module Assets

        ASSETS = {
          css: [
            ['bootstrap.min.css', 'cde1a9a9098238450afb8fccfce94c22fa2743e3']
          ],
          default_js: [
            ['jquery.min.js', '0511abe9863c2ea7084efa7e24d1d86c5b3974f1'],
            ['bootstrap.min.js', '75a42212affc118fef849aba4b9326a7da2acda1']
          ],
          legacy_js: [
            ['html5.js', 'c9d8ca77abcd9789b91b4c3263f257e1fc1ee103'],
            ['respond.min.js', '301398aa216be8655b976ba153d299c2c54a73d4']
          ],
          fonts: [
            ['glyphicons-halflings-regular.eot', 'd53dff38dfb5c414015dfb31d30a473c95b50904'],
            ['glyphicons-halflings-regular.svg', '796e58aedfcfe8a3b0829bc0594f739936a9d7d0'],
            ['glyphicons-halflings-regular.ttf', 'c427041d38cd6597ae7e758028ab72756849ec26'],
            ['glyphicons-halflings-regular.woff','c707207e52ffe555a36880e9873d146c226e3533']
          ]
        }

        def self.css_tag(url, attrb = '')
          "<link rel='stylesheet' type='text/css' #{attrb} href='#{url}'>\n"
        end

        def self.js_tag(url, attrb = '')
          "<script type='text/javascript' #{attrb} src='#{url}'></script>\n"
        end

        def self.generate_bootstrap_asset_routes(app)
          ASSETS.each do |kind, files|
            files.each do |file|
              name, sha1 = file
              app.get '/%s/%s' % [kind.to_s.split('_').last, name], :provides => name.split('.').last do
                cache_control :public, :must_revalidate, :max_age => 3600
                etag sha1
                File.read(File.join(File.dirname(__FILE__), 'assets', name))
              end
            end
          end
        end

        def self.registered(app)
          generate_bootstrap_asset_routes(app)
          app.helpers AssetsHelper
        end

      end

      module AssetsHelper

        def bootstrap_css(meta = true, attrb = '')
          output = ''
          output += "<meta name='viewport' content='width=device-width, initial-scale=1.0'>\n" if meta

          Assets::ASSETS[:css].each do |file, _|
            output += Assets::css_tag url('/css/%s' % file, attrb) 
          end

          output.chomp
        end

        def bootstrap_js_legacy(attrb = '')
          output = ''

          Assets::ASSETS[:legacy_js].each do |file, _|
            output += Assets::js_tag url('/js/%s' % file, attrb)
          end

          "<!--[if lt IE 9]> \n#{output.chomp} \n<![endif]-->"
        end

        def bootstrap_js_default(attrb = '')
          output = ''

          Assets::ASSETS[:default_js].each do |file, _|
            output += Assets::js_tag url('/js/%s' % file, attrb)
          end

          output.chomp
        end

        def bootstrap_js(attrb = '')
          "#{bootstrap_js_legacy(attrb)} \n#{bootstrap_js_default(attrb)}"
        end

        def bootstrap(attrb = '')
          "#{bootstrap_css(attrb)} \n#{bootstrap_js_legacy(attrb)} \n#{bootstrap_js_default(attrb)}"
        end

      end
    end
  end
end