# frozen_string_literal: true

require 'spec_helper'

RSpec.describe 'Diff file viewer', :js, :with_clean_rails_cache, feature_category: :code_review do
  let(:project) { create(:project, :public, :repository) }

  def visit_commit(sha, anchor: nil)
    visit project_commit_path(project, sha, anchor: anchor)

    wait_for_requests
  end

  context 'Ruby file' do
    before do
      visit_commit('570e7b2abdd848b95f2f578043fc23bd6f6fd24d')
    end

    it 'shows highlighted Ruby code' do
      within('.diff-file[id="2f6fcd96b88b36ce98c38da085c795a27d92a3dd"]') do
        expect(page).to have_css(".js-syntax-highlight")
        expect(page).to have_content("def popen(cmd, path=nil)")
      end
    end
  end

  context 'Ruby file (stored in LFS)' do
    before do
      project.add_maintainer(project.creator)

      @commit_id = Files::CreateService.new(
        project,
        project.creator,
        start_branch: 'master',
        branch_name: 'master',
        commit_message: "Add Ruby file in LFS",
        file_path: 'files/lfs/ruby.rb',
        file_content: project.repository.blob_at('master', 'files/lfs/lfs_object.iso').data
      ).execute[:result]
    end

    context 'when LFS is enabled on the project' do
      before do
        allow(Gitlab.config.lfs).to receive(:enabled).and_return(true)
        project.update_attribute(:lfs_enabled, true)

        visit_commit(@commit_id)
      end

      it 'shows an error message' do
        expect(page).to have_content('This source diff could not be displayed because it is stored in LFS. You can view the blob instead.')
      end
    end

    context 'when LFS is disabled on the project' do
      before do
        visit_commit(@commit_id)
      end

      it 'displays the diff' do
        expect(page).to have_content('size 1575078')
      end
    end
  end

  context 'Image file' do
    context 'Replaced' do
      before do
        visit_commit('2f63565e7aac07bcdadb654e253078b727143ec4')
      end

      it 'shows a rendered image' do
        within('.diff-file[id="e986451b8f7397b617dbb6fffcb5539328c56921"]') do
          expect(page).to have_css('img[alt="files/images/6049019_460s.jpg"]')
        end
      end

      it 'shows view replaced and view file links' do
        expect(page.all('.file-actions a').length).to eq 2
        expect(page.all('.file-actions a')[0]).to have_content 'View replaced file @'
        expect(page.all('.file-actions a')[1]).to have_content 'View file @'
      end
    end

    context 'Added' do
      before do
        visit_commit('33f3729a45c02fc67d00adb1b8bca394b0e761d9')
      end

      it 'shows view file link' do
        expect(page.all('.file-actions a').length).to eq 1
        expect(page.all('.file-actions a')[0]).to have_content 'View file @'
      end
    end

    context 'Deleted' do
      before do
        visit_commit('7fd7a459706ee87be6f855fd98ce8c552b15529a')
      end

      it 'shows view file link' do
        expect(page.all('.file-actions a').length).to eq 1
        expect(page.all('.file-actions a')[0]).to have_content 'View file @'
      end
    end
  end

  context 'ISO file (stored in LFS)' do
    context 'when LFS is enabled on the project' do
      before do
        allow(Gitlab.config.lfs).to receive(:enabled).and_return(true)
        project.update_attribute(:lfs_enabled, true)

        visit_commit('048721d90c449b244b7b4c53a9186b04330174ec')
      end

      it 'shows that file was added' do
        expect(page).to have_content('File added')
      end
    end

    context 'when LFS is disabled on the project' do
      before do
        visit_commit('048721d90c449b244b7b4c53a9186b04330174ec')
      end

      it 'displays the diff' do
        expect(page).to have_content('size 1575078')
      end
    end
  end

  context 'ZIP file' do
    before do
      visit_commit('ae73cb07c9eeaf35924a10f713b364d32b2dd34f')
    end

    it 'shows that file was added' do
      expect(page).to have_content('File added')
    end
  end

  context 'renamed file' do
    before do
      visit_commit('6907208d755b60ebeacb2e9dfea74c92c3449a1f')
    end

    it 'shows the filename with diff highlight' do
      within('.file-header-content') do
        expect(page).to have_css('.idiff.left.right.deletion')
        expect(page).to have_content('files/js/commit.coffee')
      end
    end
  end

  context 'binary file that appears to be text in the first 1024 bytes' do
    before do
      visit_commit('7b1cf4336b528e0f3d1d140ee50cafdbc703597c')
    end

    it 'shows the diff is collapsed' do
      expect(page).to have_content('This diff is collapsed. Click to expand it.')
    end

    context 'expanding the diff' do
      before do
        click_button 'Click to expand it.'

        wait_for_requests
      end

      it 'shows that file was added' do
        expect(page).to have_content('File added')
      end
    end
  end

  context 'when the the encoding of the file is unsupported' do
    before do
      visit_commit('f05a98786e4274708e1fa118c7ad3a29d1d1b9a3')
    end

    it 'shows it is not diffable' do
      expect(page).to have_content("File suppressed by a .gitattributes entry or the file's encoding is unsupported.")
    end
  end
end