# -*- encoding: utf-8 -*-

module Genit

  # Web site "compiler".
  class Compiler

    # Public: Constructor.
    #
    # working_dir - The String working directory, where live the project.
    def initialize working_dir
      @working_dir = working_dir
      check_missing_file '.genit', 'Not a genit project folder'
      check_missing_file 'config', 'Missing config file'
    end

    # Public: Compile the web site.
    def compile
      RootCleaner.new(@working_dir).clean
      compile_site
      Css.new(@working_dir).render
    end

    private

      def check_missing_file filename, message
        unless File.exist?(File.join(@working_dir, filename))
          error message
        end
      end

      def compile_site
        compile_pages
        create_rss_feed
        create_sitemap_xml
      end

      def compile_pages
        Dir.glob(File.join(@working_dir, PAGES_DIR, '**/*')) do |file|
          next if File.directory?(file)
          @filename = file.gsub(File.join(@working_dir, PAGES_DIR) + '/', '')
          compile_page
        end
      end

      def compile_page
        pc = PageCompiler.new @working_dir, @filename
        @page = pc.compile
        save_file_as_xhtml
      end

      def save_file_as_xhtml
        doc_writer = DocumentWriter.new @working_dir
        doc_writer.save_as_xhtml @page, @filename
      end

      def create_rss_feed
        all_news_files =
          Dir.glob(File.join(@working_dir, NEWS_DIR, '*')).sort.reverse
        begin
          config_file = YAML.load_file(File.join(@working_dir, 'config'))
        rescue Exception => msg
          error "In config file: #{msg}"
        end
        return unless config_file[:rss]
        RssFeed.new(@working_dir, all_news_files, config_file).generate_rss
      end

      def create_sitemap_xml
        pages = PagesFinder.new(@working_dir).find
        config_file = YAML.load_file(File.join(@working_dir, 'config'))
        urls = PagesFinder.pagenames2urls(pages, config_file[:address])
        sitemap = Sitemap.new(urls).get
        FileWriter.write sitemap, File.join(@working_dir, 'sitemap.xml')
      end

  end

end