require 'rails_helper'

RSpec.describe HistoryAccess do
  include_context 'Ainu locale'

  let!(:tag) { create(:tag) }

  it 'uses the complete tag-description identity and version order at equal timestamps' do
    locale
    rows = ['ja', 'ain'].flat_map do |language|
      ['create', 'discard', 'restore'].each_with_index.map do |event, index|
        TagDescriptionVersion.create!(tag_id: tag.id, language_code: language,
            version_no: index + 1, event_type: language == 'ain' ? 'update' : event,
            body: "#{ language } #{ index }", created_at: Time.utc(2024))
      end
    end
    described_class.set(user: nil) do
      expect(described_class.visible(TagDescriptionVersion.where(id: rows.map(&:id))).pluck(:id))
          .to match_array([rows[2], *rows.last(3)].map(&:id))
      expect { described_class.require!(rows.first) }.to raise_error(HistoryAccess::Forbidden)
    end
    described_class.set(user: create(:user, :admin)) do
      expect(described_class.visible(TagDescriptionVersion.where(id: rows.map(&:id))).count).to eq(6)
    end
  end

  it 'invalidates public artifacts after a new discard and binds admin artifacts to their actor' do
    public_metadata = described_class.set(user: nil) { described_class.authority }
    admin = create(:user, :admin)
    admin_metadata = described_class.set(user: admin) { described_class.authority }
    TagVersion.create!(tag:, version_no: 1, event_type: 'discard', name: 'private',
        category: 'general',
        names: { ja: { name: 'private', script_code: 'Jpan',
                       auto_generated: false, aliases: [] } },
        aliases: '', parent_tag_ids: '', created_at: Time.utc(2024))
    described_class.set(user: nil) do
      expect(described_class.authorised_artifact?(public_metadata)).to be(false)
      expect(described_class.authorised_artifact?(admin_metadata)).to be(false)
    end
    described_class.set(user: create(:user, :admin)) do
      expect(described_class.authorised_artifact?(admin_metadata)).to be(false)
    end
    described_class.set(user: admin) do
      expect(described_class.authorised_artifact?(admin_metadata)).to be(true)
      admin.update!(role: :guest)
      expect(described_class.authorised_artifact?(admin_metadata)).to be(false)
    end
  end

  it 'denies a blob attached to a discarded post including its derived attachment' do
    post = create(:post)
    blob = ActiveStorage::Blob.create_before_direct_upload!(filename: 'private.png',
        byte_size: 1, checksum: Base64.strict_encode64('checksum'), content_type: 'image/png')
    ActiveStorage::Attachment.create!(name: 'thumbnail', record: post, blob:)
    PostVersion.create!(post:, version_no: 1, event_type: 'discard', url: post.url,
        title: 'private', tags: '', tags_json: [], parent_post_ids: '', created_at: Time.utc(2024))
    variant = ActiveStorage::VariantRecord.create!(blob:, variation_digest: 'spec-variation')
    derived = ActiveStorage::Blob.create_before_direct_upload!(filename: 'derived.png',
        byte_size: 1, checksum: Base64.strict_encode64('checksum'), content_type: 'image/png')
    ActiveStorage::Attachment.create!(name: 'image', record: variant, blob: derived)
    described_class.set(user: nil) do
      expect(described_class.blob_visible?(blob)).to be(false)
      expect(described_class.blob_visible?(derived)).to be(false)
    end
    described_class.set(user: create(:user, :admin)) do
      expect(described_class.blob_visible?(derived)).to be(true)
    end
  end
end