# frozen_string_literal: true

module Bolognese
  module Readers
    module BibtexReader
      BIB_TO_CP_TRANSLATIONS = {
        "article" => "article-journal",
        "phdthesis" => "thesis"
      }

      BIB_TO_RIS_TRANSLATIONS = {
        "article" => "JOUR",
        "book" => "BOOK",
        "inbook" => "CHAP",
        "inproceedings" => "CPAPER",
        "manual" => nil,
        "misc" => "GEN",
        "phdthesis" => "THES",
        "proceedings" => "CONF",
        "techreport" => "RPRT",
        "unpublished" => "UNPD"
      }

      BIB_TO_SO_TRANSLATIONS = {
        "article" => "ScholarlyArticle",
        "phdthesis" => "Thesis"
      }

      def read_bibtex(string: nil, **options)
        meta = string.present? ? BibTeX.parse(string).first : OpenStruct.new

        schema_org = BIB_TO_SO_TRANSLATIONS[meta.try(:type).to_s] || "ScholarlyArticle"
        types = {
          "resourceTypeGeneral" => Metadata::SO_TO_DC_TRANSLATIONS[schema_org],
          "resource_type" => Bolognese::Utils::BIB_TO_CR_TRANSLATIONS[meta.try(:type).to_s] || meta.try(:type).to_s,
          "schemaOrg" => schema_org,
          "bibtex" => meta.type.to_s,
          "citeproc" => BIB_TO_CP_TRANSLATIONS[meta.try(:type).to_s] || "misc",
          "ris" => BIB_TO_RIS_TRANSLATIONS[meta.try(:type).to_s] || "GEN"
        }.compact
        doi = meta.try(:doi).to_s.presence

        author = Array(meta.try(:author)).map do |a|
                  { "type" => "Person",
                    "name" => [a.first, a.last].join(" "),
                    "givenName" => a.first,
                    "familyName" => a.last }.compact
                end

        related_identifiers = if meta.try(:journal).present? && meta.try(:issn).to_s.presence
          [{ "type" => "Periodical",
             "relationType" => "IsPartOf",
             "relatedIdentifierType" => "ISSN",
             "title" => meta.journal.to_s,
             "relatedIdentifier" => meta.try(:issn).to_s.presence }.compact]
        else
          nil
        end

        periodical = if meta.try(:journal).present?
          { "type" => "Periodical",
            "title" => meta.journal.to_s,
            "issn" => meta.try(:issn).to_s.presence }.compact
        else
          nil
        end

        page_first, page_last = meta.try(:pages).to_s.split("-")
        state = doi.present? ? "findable" : "not_found"
        dates = if meta.try(:date).present?
          [{ "date" => meta.date.to_s,
             "dateType" => "Issued" }]
        else
          nil
        end
        publication_year =  meta.try(:date).present? ? meta.date.to_s[0..3] : nil

        { "id" => normalize_doi(doi),
          "types" => types,
          "doi" => doi,
          "url" => meta.try(:url).to_s.presence,
          "titles" => meta.try(:title).present? ? [{ "title" => meta.try(:title).to_s }] : [],
          "creator" => author,
          "periodical" => periodical,
          "publisher" => meta.try(:publisher).to_s.presence,
          "related_identifiers" => related_identifiers,
          "dates" => dates,
          "publication_year" => publication_year,
          "volume" => meta.try(:volume).to_s.presence,
          "page_first" => page_first,
          "page_last" => page_last,
          "descriptions" => meta.try(:abstract).present? ? [{ "description" => meta.try(:abstract) && sanitize(meta.abstract.to_s).presence, "descriptionType" => "Abstract" }] : [],
          "rights_list" =>  meta.try(:copyright).present? ? [{ "rightsUri" => meta.try(:copyright).to_s.presence }.compact] : [],
          "state" => state
        }
      end
    end
  end
end