require "spec_helper"

describe ProjectWiki do
  let(:project) { create(:empty_project) }
  let(:repository) { project.repository }
  let(:user) { project.owner }
  let(:gitlab_shell) { Gitlab::Shell.new }
  let(:project_wiki) { ProjectWiki.new(project, user) }

  subject { project_wiki }
  before { project_wiki.wiki }

  describe "#path_with_namespace" do
    it "returns the project path with namespace with the .wiki extension" do
      subject.path_with_namespace.should == project.path_with_namespace + ".wiki"
    end
  end

  describe "#url_to_repo" do
    it "returns the correct ssh url to the repo" do
      subject.url_to_repo.should == gitlab_shell.url_to_repo(subject.path_with_namespace)
    end
  end

  describe "#ssh_url_to_repo" do
    it "equals #url_to_repo" do
      subject.ssh_url_to_repo.should == subject.url_to_repo
    end
  end

  describe "#http_url_to_repo" do
    it "provides the full http url to the repo" do
      gitlab_url = Gitlab.config.gitlab.url
      repo_http_url = "#{gitlab_url}/#{subject.path_with_namespace}.git"
      subject.http_url_to_repo.should == repo_http_url
    end
  end

  describe "#wiki" do
    it "contains a Gollum::Wiki instance" do
      subject.wiki.should be_a Gollum::Wiki
    end

    it "creates a new wiki repo if one does not yet exist" do
      project_wiki.create_page("index", "test content").should be_true
    end

    it "raises CouldNotCreateWikiError if it can't create the wiki repository" do
      project_wiki.stub(:init_repo).and_return(false)
      expect { project_wiki.send(:create_repo!) }.to raise_exception(ProjectWiki::CouldNotCreateWikiError)
    end
  end

  describe "#empty?" do
    context "when the wiki repository is empty" do
      before do
        Gitlab::Shell.any_instance.stub(:add_repository) do
          create_temp_repo("#{Rails.root}/tmp/test-git-base-path/non-existant.wiki.git")
        end
        project.stub(:path_with_namespace).and_return("non-existant")
      end

      its(:empty?) { should be_true }
    end

    context "when the wiki has pages" do
      before do
        create_page("index", "This is an awesome new Gollum Wiki")
      end

      its(:empty?) { should be_false }
    end
  end

  describe "#pages" do
    before do
      create_page("index", "This is an awesome new Gollum Wiki")
      @pages = subject.pages
    end

    after do
      destroy_page(@pages.first.page)
    end

    it "returns an array of WikiPage instances" do
      @pages.first.should be_a WikiPage
    end

    it "returns the correct number of pages" do
      @pages.count.should == 1
    end
  end

  describe "#find_page" do
    before do
      create_page("index page", "This is an awesome Gollum Wiki")
    end

    after do
      destroy_page(subject.pages.first.page)
    end

    it "returns the latest version of the page if it exists" do
      page = subject.find_page("index page")
      page.title.should == "index page"
    end

    it "returns nil if the page does not exist" do
      subject.find_page("non-existant").should == nil
    end

    it "can find a page by slug" do
      page = subject.find_page("index-page")
      page.title.should == "index page"
    end

    it "returns a WikiPage instance" do
      page = subject.find_page("index page")
      page.should be_a WikiPage
    end
  end

  describe '#find_file' do
    before do
      file = Gollum::File.new(subject.wiki)
      Gollum::Wiki.any_instance.
                   stub(:file).with('image.jpg', 'master', true).
                   and_return(file)
      Gollum::File.any_instance.
                   stub(:mime_type).
                   and_return('image/jpeg')
      Gollum::Wiki.any_instance.
                   stub(:file).with('non-existant', 'master', true).
                   and_return(nil)
    end

    after do
      Gollum::Wiki.any_instance.unstub(:file)
      Gollum::File.any_instance.unstub(:mime_type)
    end

    it 'returns the latest version of the file if it exists' do
      file = subject.find_file('image.jpg')
      file.mime_type.should == 'image/jpeg'
    end

    it 'returns nil if the page does not exist' do
      subject.find_file('non-existant').should == nil
    end

    it 'returns a Gollum::File instance' do
      file = subject.find_file('image.jpg')
      file.should be_a Gollum::File
    end
  end

  describe "#create_page" do
    after do
      destroy_page(subject.pages.first.page)
    end

    it "creates a new wiki page" do
      subject.create_page("test page", "this is content").should_not == false
      subject.pages.count.should == 1
    end

    it "returns false when a duplicate page exists" do
      subject.create_page("test page", "content")
      subject.create_page("test page", "content").should == false
    end

    it "stores an error message when a duplicate page exists" do
      2.times { subject.create_page("test page", "content") }
      subject.error_message.should =~ /Duplicate page:/
    end

    it "sets the correct commit message" do
      subject.create_page("test page", "some content", :markdown, "commit message")
      subject.pages.first.page.version.message.should == "commit message"
    end
  end

  describe "#update_page" do
    before do
      create_page("update-page", "some content")
      @gollum_page = subject.wiki.paged("update-page")
      subject.update_page(@gollum_page, "some other content", :markdown, "updated page")
      @page = subject.pages.first.page
    end

    after do
      destroy_page(@page)
    end

    it "updates the content of the page" do
      @page.raw_data.should == "some other content"
    end

    it "sets the correct commit message" do
      @page.version.message.should == "updated page"
    end
  end

  describe "#delete_page" do
    before do
      create_page("index", "some content")
      @page = subject.wiki.paged("index")
    end

    it "deletes the page" do
      subject.delete_page(@page)
      subject.pages.count.should == 0
    end
  end

  private

  def create_temp_repo(path)
    FileUtils.mkdir_p path
    system(*%W(git init --quiet --bare -- #{path}))
  end

  def remove_temp_repo(path)
    FileUtils.rm_rf path
  end

  def commit_details
    commit = {name: user.name, email: user.email, message: "test commit"}
  end

  def create_page(name, content)
    subject.wiki.write_page(name, :markdown, content, commit_details)
  end

  def destroy_page(page)
    subject.wiki.delete_page(page, commit_details)
  end
end