require 'open-uri'
require 'json'
require 'date'
require 'thor'

module Sist02
  module Cli
    class CiNii < Thor
      desc "cinii_articles NAID", "get cinii articles bibliography"
      def cinii_articles(naid)
        begin
          html = open("http://ci.nii.ac.jp/naid/#{naid}.json").read
          json = JSON.parser.new(html)
          hash = json.parse["@graph"][0]
          title =  hash["dc:title"][0]["@value"]
          creator_raw = hash["dc:creator"]
          creator = ''
          creator_raw.each do |item|
            creator += "#{item[0]["@value"]}, "
          end
          creator = creator.gsub(/\,\s$/, '')
          publication_name = hash["prism:publicationName"][0]["@value"]
          year = hash["dc:date"].match(/\d{4}/)
          volume = hash["prism:volume"]
          number = hash["prism:number"]
          start_p = hash["prism:startingPage"]
          end_p = hash["prism:endingPage"]
          result = "#{creator}. #{title}. #{publication_name}. #{year}, vol. #{volume}, no. #{number}, p. #{start_p}-#{end_p}."
        rescue => e
          result = e
        end
        puts result
        return result
      end

      desc "cinii_books NAID", "get cinii books bibliography"
      def cinii_books(ncid)
        begin
          html = open("http://ci.nii.ac.jp/ncid/#{ncid}.json").read
          json = JSON.parser.new(html)
          hash = json.parse["@graph"][0]
          title = hash["dc:title"][0]["@value"]
          publisher = hash["dc:publisher"][0]
          year = hash["dc:date"].match(/\d{4}/)
          edition = hash["prism:edition"]
          author_ary = Array.new
          hash["foaf:maker"].each do |item|
            author_ary << item["foaf:name"][0]["@value"].gsub(/(\s|　|,)+/, '')
          end
          author = author_ary.join(", ")

          ris = open("http://ci.nii.ac.jp/ncid/#{ncid}.ris").read
          pages = ris.match(/EP  - ([a-z]*, )?\d+p/).to_s.gsub(/EP  - /, '')
          pages = "ページ数不明" if pages == ''
          result = "#{author}. #{title}. #{edition}, #{publisher}, #{year}, #{pages}." unless edition == nil
          result = "#{author}. #{title}. #{publisher}, #{year}, #{pages}." if edition == nil # for bibliographic information that doesn't have edition display
        rescue => e
          result = e
        end
        puts result
        return result
      end
    end
  end
end