require "tagen/core/io"
require "isbn"

module Saber
  module Task
    class FindUploads < Base
      desc "find_uploads", "find_uploads"
      def find_uploads(page="1")
        bib = Tracker["bib"].new(options)
        stp = Tracker["stp"].new(options)
        dir = Rc._fetch("find_uploads.dir", ".")
        bib.agent.pluggable_parser["application/x-bittorrent"] = Mechanize::DirectorySaver.save_to(dir.to_s)
        bib.login
        stp.login

        bib.browse(page) {|torrent|
          title, isbn, download_link, filenames, tags = torrent[:title], torrent[:isbn], 
            torrent[:download_link], torrent[:filenames], torrent[:tags]

          generic_tags = convert_bibtags(tags)

          begin
            isbn = ISBN.thirteen(torrent[:isbn])
          rescue ISBN::Invalid13DigitISBN # empty
            next
          end

          if not stp.exists?(isbn: isbn)
            bib.get(download_link)

            Saber.ui.say "#{isbn} #{title}\n    #{filenames.join("\n    ")}"
            File.append("list", "#{filenames[0]}:#{isbn}\n")

            # local data
            local_data = Pa.exists?("#{Rc.p.database}/#{isbn}.yml") ? YAML.load_file("#{Rc.p.database}/#{isbn}.yml") : {}
            local_data.merge!({"tags" => generic_tags.join(", "), "bib.tags" => tags.join(", ")})
            File.write "#{Rc.p.database}/#{isbn}.yml", YAML.dump(local_data)
          end
        }
      end

    private

      def convert_bibtags(tags)
        tags.map {|v| 
          v.gsub(/ \(programming\)/i, '')
        }.sort_by {|v| 
          %w[fiction nonfiction].include?(v) ? -1 : tags.index(v)
        }
      end
    end
  end
end