# frozen_string_literal: true

module Commonmeta
  module Readers
    module CslReader
      def read_csl(string: nil, **options)
        if string.present?
          errors = jsonlint(string)
          return { 'errors' => errors } if errors.present?
        end

        read_options = ActiveSupport::HashWithIndifferentAccess.new(options.except(:doi, :id, :url,
                                                                                   :sandbox, :validate, :ra))

        meta = string.present? ? JSON.parse(string) : {}

        citeproc_type = meta.fetch('type', nil)
        type = Commonmeta::Utils::CSL_TO_CM_TRANSLATIONS.fetch(citeproc_type, 'Other')

        creators = if meta.fetch('author', nil).present?
                     get_authors(from_csl(Array.wrap(meta.fetch('author', nil))))
                   else
                     [{ 'type' => 'Organization', 'name' => ':(unav)' }]
                   end
        contributors = get_authors(from_csl(Array.wrap(meta.fetch('editor', nil))))

        date = {}
        d = get_date_from_date_parts(meta.fetch('issued', nil))
        date['published'] = d if Date.edtf(d).present?

        license = if meta.fetch('copyright', nil)
                    hsh_to_spdx('rightsURI' => meta.fetch('copyright'))
                  end
        container = if meta.fetch('container-title', nil).present?
                      first_page = if meta.fetch('page', nil).present?
                                     meta.fetch('page').split('-').map(&:strip)[0]
                                   end
                      last_page = if meta.fetch('page', nil).present?
                                    meta.fetch('page').split('-').map(&:strip)[1]
                                  end

                      { 'type' => 'Periodical',
                        'title' => meta.fetch('container-title', nil),
                        'identifier' => meta.fetch('ISSN', nil),
                        'identifierType' => meta.fetch('ISSN', nil).present? ? 'ISSN' : nil,
                        'volume' => meta.fetch('volume', nil),
                        'issue' => meta.fetch('issue', nil),
                        'firstPage' => first_page,
                        'lastPage' => last_page }.compact
                    end

        id = normalize_id(meta.fetch('id', nil) || meta.fetch('DOI', nil))

        state = id.present? || read_options.present? ? 'findable' : 'not_found'
        subjects = Array.wrap(meta.fetch('categories', nil)).reduce([]) do |sum, subject|
          sum += name_to_fos(subject)

          sum
        end

        { 'id' => id,
          'type' => type,
          'url' => normalize_id(meta.fetch('URL', nil)),
          'titles' => [{ 'title' => meta.fetch('title', nil) }],
          'creators' => creators,
          'contributors' => contributors,
          'container' => container,
          'publisher' => if meta.fetch('publisher', nil)
                           { 'name' => meta.fetch('publisher', nil) }
                         end,
          'date' => date,
          'descriptions' => if meta.fetch('abstract', nil).present?
                              [{ 'description' => sanitize(meta.fetch('abstract')),
                                 'descriptionType' => 'Abstract' }]
                            else
                              []
                            end,
          'license' => license,
          'version' => meta.fetch('version', nil),
          'subjects' => subjects,
          'state' => state }.compact.merge(read_options)
      end
    end
  end
end