# frozen_string_literal: true

require_relative 'test_helper'

context 'Preamble' do
  test 'title and single paragraph preamble before section' do
    input = <<~'EOS'
    = Title

    Preamble paragraph 1.

    == First Section

    Section paragraph 1.
    EOS
    result = convert_string input
    assert_xpath '//p', result, 2
    assert_xpath '//*[@id="preamble"]', result, 1
    assert_xpath '//*[@id="preamble"]//p', result, 1
    assert_xpath '//*[@id="preamble"]/following-sibling::*//h2[@id="_first_section"]', result, 1
    assert_xpath '//*[@id="preamble"]/following-sibling::*//p', result, 1
  end

  test 'title of preface is blank by default in DocBook output' do
    input = <<~'EOS'
    = Document Title
    :doctype: book

    Preface content.

    == First Section

    Section content.
    EOS
    result = convert_string input, backend: :docbook
    assert_xpath '//preface/title', result, 1
    title_node = xmlnodes_at_xpath '//preface/title', result, 1
    assert_equal '', title_node.text
  end

  test 'preface-title attribute is assigned as title of preface in DocBook output' do
    input = <<~'EOS'
    = Document Title
    :doctype: book
    :preface-title: Preface

    Preface content.

    == First Section

    Section content.
    EOS
    result = convert_string input, backend: :docbook
    assert_xpath '//preface/title[text()="Preface"]', result, 1
  end

  test 'title and multi-paragraph preamble before section' do
    input = <<~'EOS'
    = Title

    Preamble paragraph 1.

    Preamble paragraph 2.

    == First Section

    Section paragraph 1.
    EOS
    result = convert_string input
    assert_xpath '//p', result, 3
    assert_xpath '//*[@id="preamble"]', result, 1
    assert_xpath '//*[@id="preamble"]//p', result, 2
    assert_xpath '//*[@id="preamble"]/following-sibling::*//h2[@id="_first_section"]', result, 1
    assert_xpath '//*[@id="preamble"]/following-sibling::*//p', result, 1
  end

  test 'should not wrap content in preamble if document has title but no sections' do
    input = <<~'EOS'
    = Title

    paragraph
    EOS
    result = convert_string input
    assert_xpath '//p', result, 1
    assert_xpath '//*[@id="content"]/*[@class="paragraph"]/p', result, 1
    assert_xpath '//*[@id="content"]/*[@class="paragraph"]/following-sibling::*', result, 0
  end

  test 'title and section without preamble' do
    input = <<~'EOS'
    = Title

    == First Section

    Section paragraph 1.
    EOS
    result = convert_string input
    assert_xpath '//p', result, 1
    assert_xpath '//*[@id="preamble"]', result, 0
    assert_xpath '//h2[@id="_first_section"]', result, 1
  end

  test 'no title with preamble and section' do
    input = <<~'EOS'
    Preamble paragraph 1.

    == First Section

    Section paragraph 1.
    EOS
    result = convert_string input
    assert_xpath '//p', result, 2
    assert_xpath '//*[@id="preamble"]', result, 0
    assert_xpath '//h2[@id="_first_section"]/preceding::p', result, 1
  end

  test 'preamble in book doctype' do
    input = <<~'EOS'
    = Book
    :doctype: book

    Back then...

    = Chapter One

    [partintro]
    It was a dark and stormy night...

    == Scene One

    Someone's gonna get axed.

    = Chapter Two

    [partintro]
    They couldn't believe their eyes when...

    == Scene One

    The axe came swinging.
    EOS

    d = document_from_string input
    assert_equal 'book', d.doctype
    output = d.convert
    assert_xpath '//h1', output, 3
    assert_xpath %{//*[@id="preamble"]//p[text() = "Back then#{decode_char 8230}#{decode_char 8203}"]}, output, 1
  end

  test 'should output table of contents in preamble if toc-placement attribute value is preamble' do
    input = <<~'EOS'
    = Article
    :toc:
    :toc-placement: preamble

    Once upon a time...

    == Section One

    It was a dark and stormy night...

    == Section Two

    They couldn't believe their eyes when...
    EOS

    output = convert_string input
    assert_xpath '//*[@id="preamble"]/*[@id="toc"]', output, 1
  end
end