require "tmpdir"
require "asciidoctor"

def setup_tmpdir(method_name = :tmpdir)
  let(method_name) { File.join Dir.tmpdir, "asciidoctor-bibliography_tests" }

  around(:each) do |example|
    FileUtils.rm_rf method(method_name).call
    FileUtils.mkdir_p method(method_name).call
    example.run
    FileUtils.rm_rf method(method_name).call
  end
end

def setup_main_document(_path, content)
  input_path = File.join(tmpdir, "main.adoc")
  output_path = File.join(tmpdir, "main.html")
  File.open(input_path, "w") { |file| file.write content }
  [input_path, output_path]
end

def setup_file(_path, name, content)
  File.open(File.join(tmpdir, name), "w") { |file| file.write content }
end

def setup_bibliography(content)
  let(:bibliography_path) do
    File.join(tmpdir, "bibliography.bibtex")
  end

  before do
    File.open(bibliography_path, "w") { |file| file.write content }
  end
end

describe "asciidoctor integration" do
  setup_tmpdir

  setup_bibliography <<~BIBTEX
    @article{Foo00,
      author = {Foo Bar},
      title =	{Title},
      publisher = {Publisher},
      year = {2000}
    }

    @article{Qux00,
      author = {Qux Zot},
      title =	{Title},
      publisher = {Publisher},
      year = {3000}
    }
  BIBTEX

  describe "testing procedure" do
    it "works in the trivial case" do
      input_path, output_path = setup_main_document tmpdir, <<~'ADOC'
        Hello World.
      ADOC

      expect { `asciidoctor #{input_path}` }.to_not raise_exception
      expect(File.read(output_path)).to match <<~'BODY'
        <div id="content">
        <div class="paragraph">
        <p>Hello World.</p>
        </div>
        </div>
      BODY
    end
  end

  describe "single file usage" do
    it "works with a single file, a citation and the bibliography" do
      input_path, output_path = setup_main_document tmpdir, <<~ADOC
        :bibliography-database: #{bibliography_path}

        Hello World. cite:[Foo00]

        bibliography::[]
      ADOC

      expect { `asciidoctor -r asciidoctor-bibliography #{input_path} --trace` }.to_not raise_exception
      expect(File.read(output_path)).to include <<~'BODY'
        <div id="content">
        <div class="paragraph">
        <p>Hello World. (<a href="#bibliography-default-Foo00">Bar, 2000</a>)</p>
        </div>
        <div class="paragraph">
        <p><a id="bibliography-default-Foo00"></a>Bar, F. (2000). Title.</p>
        </div>
        </div>
      BODY
    end
  end

  describe "nested files usage" do
    it "works with a single file, a citation and the bibliography" do
      setup_file tmpdir, "nested.adoc", <<~ADOC
        This is content from a nested file. cite:[Foo00]

        bibliography::[]
      ADOC

      input_path, output_path = setup_main_document tmpdir, <<~ADOC
        :bibliography-database: #{bibliography_path}

        Hello World. cite:[Foo00]

        include::nested.adoc[]
      ADOC

      expect { `asciidoctor -r asciidoctor-bibliography #{input_path} --trace` }.to_not raise_exception
      expect(File.read(output_path)).to include <<~'BODY'
        <div id="content">
        <div class="paragraph">
        <p>Hello World. (<a href="#bibliography-default-Foo00">Bar, 2000</a>)</p>
        </div>
        <div class="paragraph">
        <p>This is content from a nested file. (<a href="#bibliography-default-Foo00">Bar, 2000</a>)</p>
        </div>
        <div class="paragraph">
        <p><a id="bibliography-default-Foo00"></a>Bar, F. (2000). Title.</p>
        </div>
        </div>
      BODY
    end
  end

  describe "multiple bibliographies usage" do
    it "works with a single file and multiple bibliographies" do
      setup_file tmpdir, "nested.adoc", <<~ADOC
        This is content from a nested file. cite:[Foo00]

        bibliography::[]
      ADOC

      input_path, output_path = setup_main_document tmpdir, <<~ADOC
        :bibliography-database: #{bibliography_path}

        ## Citations

        cite:[Foo00]

        cite:first[Qux00]

        cite:first[Foo00]+last[Qux00]

        ## Bibliographies

        ### Default

        bibliography::[]

        ### First

        bibliography::first[]

        ### Last

        bibliography::last[]
      ADOC

      expect { `asciidoctor -r asciidoctor-bibliography #{input_path} --trace` }.to_not raise_exception
      expect(File.read(output_path)).to include <<~'BODY'
        <div id="content">
        <div class="sect1">
        <h2 id="_citations">Citations</h2>
        <div class="sectionbody">
        <div class="paragraph">
        <p>(<a href="#bibliography-default-Foo00">Bar, 2000</a>)</p>
        </div>
        <div class="paragraph">
        <p>(<a href="#bibliography-first-Qux00">Zot, 3000</a>)</p>
        </div>
        <div class="paragraph">
        <p>(<a href="#bibliography-first-Foo00">Bar, 2000</a>; <a href="#bibliography-last-Qux00">Zot, 3000</a>)</p>
        </div>
        </div>
        </div>
        <div class="sect1">
        <h2 id="_bibliographies">Bibliographies</h2>
        <div class="sectionbody">
        <div class="sect2">
        <h3 id="_default">Default</h3>
        <div class="paragraph">
        <p><a id="bibliography-default-Foo00"></a>Bar, F. (2000). Title.</p>
        </div>
        </div>
        <div class="sect2">
        <h3 id="_first">First</h3>
        <div class="paragraph">
        <p><a id="bibliography-first-Foo00"></a>Bar, F. (2000). Title.</p>
        </div>
        <div class="paragraph">
        <p><a id="bibliography-first-Qux00"></a>Zot, Q. (3000). Title.</p>
        </div>
        </div>
        <div class="sect2">
        <h3 id="_last">Last</h3>
        <div class="paragraph">
        <p><a id="bibliography-last-Qux00"></a>Zot, Q. (3000). Title.</p>
        </div>
        </div>
        </div>
        </div>
        </div>
      BODY
    end
  end

  describe "including metadata files" do
    it "reads the bibliography configuration from the included file" do
      setup_file tmpdir, "database.bib", <<~ADOC
        @book{Lane12a,
          author = {P. Lane},
          title =	 {Book title},
          publisher = {Publisher},
          year =	 {2000}
        }
      ADOC

      setup_file tmpdir, "metadata.adoc", <<~ADOC
        :bibliography-database: #{tmpdir}/database.bib
        :bibliography-style: ieee
      ADOC

      input_path, output_path = setup_main_document tmpdir, <<~ADOC
        include::metadata.adoc[]

        This is a citation: cite:[Lane12a]. Yay!
      ADOC

      expect { `asciidoctor -r asciidoctor-bibliography #{input_path} --trace` }.to_not raise_exception
      expect(File.read(output_path)).to include <<~'BODY'
        <div id="content">
        <div class="paragraph">
        <p>This is a citation: <a href="#bibliography-default-Lane12a">&lsqb;1&rsqb;</a>. Yay!</p>
        </div>
        </div>
      BODY
    end
  end
end