# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Banzai::Filter::MarkdownFilter do
  include FilterSpecHelper

  shared_examples_for 'renders correct markdown' do
    describe 'markdown engine from context' do
      it 'defaults to CommonMark' do
        expect_next_instance_of(Banzai::Filter::MarkdownEngines::CommonMark) do |instance|
          expect(instance).to receive(:render).and_return('test')
        end

        filter('test')
      end

      it 'uses CommonMark' do
        expect_next_instance_of(Banzai::Filter::MarkdownEngines::CommonMark) do |instance|
          expect(instance).to receive(:render).and_return('test')
        end

        filter('test', { markdown_engine: :common_mark })
      end
    end

    describe 'code block' do
      context 'using CommonMark' do
        before do
          stub_const('Banzai::Filter::MarkdownFilter::DEFAULT_ENGINE', :common_mark)
        end

        it 'adds language to lang attribute when specified' do
          result = filter("```html\nsome code\n```", no_sourcepos: true)

          if Feature.enabled?(:use_cmark_renderer, default_enabled: :yaml)
            expect(result).to start_with('<pre lang="html"><code>')
          else
            expect(result).to start_with('<pre><code lang="html">')
          end
        end

        it 'does not add language to lang attribute when not specified' do
          result = filter("```\nsome code\n```", no_sourcepos: true)

          expect(result).to start_with('<pre><code>')
        end

        it 'works with utf8 chars in language' do
          result = filter("```日\nsome code\n```", no_sourcepos: true)

          if Feature.enabled?(:use_cmark_renderer, default_enabled: :yaml)
            expect(result).to start_with('<pre lang="日"><code>')
          else
            expect(result).to start_with('<pre><code lang="日">')
          end
        end

        it 'works with additional language parameters' do
          result = filter("```ruby:red gem foo\nsome code\n```", no_sourcepos: true)

          if Feature.enabled?(:use_cmark_renderer, default_enabled: :yaml)
            expect(result).to start_with('<pre lang="ruby:red" data-meta="gem foo"><code>')
          else
            expect(result).to start_with('<pre><code lang="ruby:red gem foo">')
          end
        end
      end
    end

    describe 'source line position' do
      context 'using CommonMark' do
        before do
          stub_const('Banzai::Filter::MarkdownFilter::DEFAULT_ENGINE', :common_mark)
        end

        it 'defaults to add data-sourcepos' do
          result = filter('test')

          expect(result).to eq '<p data-sourcepos="1:1-1:4">test</p>'
        end

        it 'disables data-sourcepos' do
          result = filter('test', no_sourcepos: true)

          expect(result).to eq '<p>test</p>'
        end
      end
    end

    describe 'footnotes in tables' do
      it 'processes footnotes in table cells' do
        text = <<-MD.strip_heredoc
      | Column1   |
      | --------- |
      | foot [^1] |

      [^1]: a footnote
        MD

        result = filter(text, no_sourcepos: true)

        expect(result).to include('<td>foot <sup')

        if Feature.enabled?(:use_cmark_renderer, default_enabled: :yaml)
          expect(result).to include('<section class="footnotes" data-footnotes>')
        else
          expect(result).to include('<section class="footnotes">')
        end
      end
    end
  end

  context 'using ruby-based HTML renderer' do
    before do
      stub_feature_flags(use_cmark_renderer: false)
    end

    it_behaves_like 'renders correct markdown'
  end

  context 'using c-based HTML renderer' do
    before do
      stub_feature_flags(use_cmark_renderer: true)
    end

    it_behaves_like 'renders correct markdown'
  end
end