# frozen_string_literal: true

RSpec.describe "DiscoTOC", system: true do
  let!(:theme) { upload_theme_component }

  fab!(:category)
  fab!(:tag)

  fab!(:topic_1) { Fabricate(:topic, category: category, tags: [tag]) }
  fab!(:topic_2) { Fabricate(:topic, category: category, tags: [tag]) }

  fab!(:post_1) do
    Fabricate(
      :post,
      raw:
        "<div data-theme-toc='true'></div>\n\n# Heading 1\nContent for the first heading\n## Heading 2\nContent for the second heading\n### Heading 3\nContent for the third heading\n# Heading 4\nContent for the fourth heading",
      topic: topic_1,
    )
  end

  fab!(:post_2) do
    Fabricate(
      :post,
      raw:
        "\n# Heading 1\nContent for the first heading\n## Heading 2\nContent for the second heading\n### Heading 3\nContent for the third heading\n# Heading 4\nContent for the fourth heading",
      topic: topic_2,
    )
  end

  fab!(:post_3) do
    Fabricate(
      :post,
      raw:
        "intentionally \n long \n content \n so \n there's \n plenty \n to be \n scrolled \n past \n which \n will \n force \n the \n timeline \n to \n hide \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll ",
      topic: topic_1,
    )
  end

  fab!(:post_4) do
    Fabricate(
      :post,
      raw:
        "<div data-theme-toc='true'></div>\n\n# Heading For Reply 1\nContent for the first heading\n## Heading For Reply 2\nContent for the second heading\n### Heading For Reply 3\nContent for the third heading\n# Heading For Reply 4\nContent for the fourth heading",
      topic: topic_1,
    )
  end

  fab!(:post_5) do
    Fabricate(
      :post,
      raw:
        "intentionally \n long \n content \n so \n there's \n plenty \n to be \n scrolled \n past \n which \n will \n force \n the \n timeline \n to \n hide \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll \n scroll ",
      topic: topic_1,
    )
  end

  it "table of contents appears when the relevant markup is added to first post in topic" do
    visit("/t/#{topic_1.id}")

    expect(page).to have_css(".d-toc-item.d-toc-h1")
  end

  it "clicking the toggle button toggles the timeline" do
    visit("/t/#{topic_1.id}")

    find(".timeline-toggle").click

    expect(page).to have_css(".timeline-scrollarea-wrapper")

    find(".timeline-toggle").click

    expect(page).to have_css(".d-toc-item.d-toc-h1")
  end

  it "timeline does not appear when the table of contents is shown" do
    visit("/t/#{topic_1.id}")

    expect(page).to have_no_css(".topic-timeline")
  end

  it "table of contents is hidden when scrolled past the first post" do
    visit("/t/#{topic_1.id}")

    page.execute_script <<~JS
      window.scrollTo(0, document.body.scrollHeight);
    JS

    expect(page).to have_css(".topic-timeline")
  end

  it "table of contents does not appear if the first post does not contain the markup" do
    visit("/t/#{topic_2.id}")

    expect(page).to have_no_css(".d-toc-item.d-toc-h1")
  end

  it "table of contents updates the highlighted section after navigating directly to other topic" do
    source_topic = Fabricate(:topic, category: category, tags: [tag])

    Fabricate(
      :post,
      topic: source_topic,
      raw:
        "<div data-theme-toc='true'></div>\n\n# Heading 1 on the source topic\nContent for the first heading\n## Heading 2\nContent for the second heading\n### Heading 3\nContent for the third heading\n# Heading 4\nContent for the fourth heading\n<a href=c>Other topic</a>",
    )
    visit("/t/#{source_topic.id}")

    expect(page).to have_css(
      ".d-toc-item.d-toc-h1.active a[data-d-toc='toc-h1-heading-1-on-the-source-topic']",
    )
    find("a[href='/t/#{topic_1.slug}/#{topic_1.id}'").click

    expect(page).to have_css(".d-toc-item.d-toc-h1.active a[data-d-toc='toc-h1-heading-1']")
    expect(page).to have_no_css("a[data-d-toc='toc-h1-heading-1-on-the-source-topic']")
  end

  it "timeline will appear without markup if auto_TOC_categories is set to the topic's category" do
    theme.update_setting(:auto_TOC_categories, "#{category.id}")
    theme.save!

    visit("/t/#{topic_2.id}")

    expect(page).to have_css(".d-toc-item.d-toc-h1")
  end

  it "timeline will not appear automatically if auto_TOC_categories is set to a different category" do
    theme.update_setting(:auto_TOC_categories, "99")
    theme.save!

    visit("/t/#{topic_2.id}")

    expect(page).to have_no_css(".d-toc-item.d-toc-h1")
  end

  it "timeline will appear without markup if auto_TOC_tags is set to the topic's tag" do
    theme.update_setting(:auto_TOC_tags, "#{tag.name}")
    theme.save!

    visit("/t/#{topic_2.id}")

    expect(page).to have_css(".d-toc-item.d-toc-h1")
  end

  it "timeline will not appear automatically if auto_TOC_tags is set to a different tag" do
    theme.update_setting(:auto_TOC_tags, "wrong-tag")
    theme.save!

    visit("/t/#{topic_2.id}")

    expect(page).to have_no_css(".d-toc-item.d-toc-h1")
  end

  it "timeline does not appear if it has fewer headings than TOC_min_heading setting" do
    theme.update_setting(:TOC_min_heading, 5)
    theme.save!

    visit("/t/#{topic_1.id}")

    expect(page).to have_no_css(".d-toc-item.d-toc-h1")
  end

  context "when enable TOC for replies" do
    before do
      theme.update_setting(:enable_TOC_for_replies, true)
      theme.save!
    end

    it "timeline does not appear for replies when the table of contents is shown" do
      visit("/t/-/#{topic_1.id}/3")

      expect(page).to have_no_css(".topic-timeline")
    end

    it "d-toc-mini will not appear without markup for replies regardless of auto_TOC_categories and auto_TOC_tags" do
      theme.update_setting(:auto_TOC_categories, "#{category.id}")
      theme.update_setting(:auto_TOC_tags, "#{tag.name}")
      theme.save!

      visit("/t/-/#{topic_1.id}/2")

      expect(page).to have_no_css(".d-toc-item.d-toc-h1")
    end
  end
end