require "spec_helper"

describe "Compare", :js do
  let(:user)    { create(:user) }
  let(:project) { create(:project, :repository) }

  before do
    project.add_maintainer(user)
    sign_in user
  end

  describe "branches" do
    it "pre-populates fields" do
      visit project_compare_index_path(project, from: "master", to: "master")

      expect(find(".js-compare-from-dropdown .dropdown-toggle-text")).to have_content("master")
      expect(find(".js-compare-to-dropdown .dropdown-toggle-text")).to have_content("master")
    end

    it "compares branches" do
      visit project_compare_index_path(project, from: "master", to: "master")

      select_using_dropdown "from", "feature"
      expect(find(".js-compare-from-dropdown .dropdown-toggle-text")).to have_content("feature")

      select_using_dropdown "to", "binary-encoding"
      expect(find(".js-compare-to-dropdown .dropdown-toggle-text")).to have_content("binary-encoding")

      click_button "Compare"

      expect(page).to have_content "Commits"
      expect(page).to have_link 'Create merge request'
    end

    it 'renders additions info when click unfold diff' do
      visit project_compare_index_path(project)

      select_using_dropdown('from', RepoHelpers.sample_commit.parent_id, commit: true)
      select_using_dropdown('to', RepoHelpers.sample_commit.id, commit: true)

      click_button 'Compare'
      expect(page).to have_content 'Commits (1)'
      expect(page).to have_content "Showing 2 changed files"

      diff = first('.js-unfold')
      diff.click
      wait_for_requests

      page.within diff.query_scope do
        expect(first('.new_line').text).not_to have_content "..."
      end
    end

    context 'when project have an open merge request' do
      let!(:merge_request) do
        create(
          :merge_request,
          title: 'Feature',
          source_project: project,
          source_branch: 'feature',
          target_branch: 'master',
          author: project.users.first
        )
      end

      it 'compares branches' do
        visit project_compare_index_path(project)

        select_using_dropdown('from', 'master')
        select_using_dropdown('to', 'feature')

        click_button 'Compare'

        expect(page).to have_content 'Commits (1)'
        expect(page).to have_content 'Showing 1 changed file with 5 additions and 0 deletions'
        expect(page).to have_link 'View open merge request', href: project_merge_request_path(project, merge_request)
        expect(page).not_to have_link 'Create merge request'
      end
    end

    it "filters branches" do
      visit project_compare_index_path(project, from: "master", to: "master")

      select_using_dropdown("from", "wip")

      find(".js-compare-from-dropdown .compare-dropdown-toggle").click

      expect(find(".js-compare-from-dropdown .dropdown-content")).to have_selector("li", count: 3)
    end

    context 'when commit has overflow', :js do
      it 'displays warning' do
        visit project_compare_index_path(project, from: "feature", to: "master")

        allow(Commit).to receive(:max_diff_options).and_return(max_files: 3)
        allow_any_instance_of(DiffHelper).to receive(:render_overflow_warning?).and_return(true)

        click_button('Compare')

        page.within('.alert') do
          expect(page).to have_text("Too many changes to show. To preserve performance only 3 of 3+ files are displayed.")
        end
      end
    end
  end

  describe "tags" do
    it "compares tags" do
      visit project_compare_index_path(project, from: "master", to: "master")

      select_using_dropdown "from", "v1.0.0"
      expect(find(".js-compare-from-dropdown .dropdown-toggle-text")).to have_content("v1.0.0")

      select_using_dropdown "to", "v1.1.0"
      expect(find(".js-compare-to-dropdown .dropdown-toggle-text")).to have_content("v1.1.0")

      click_button "Compare"
      expect(page).to have_content "Commits"
    end
  end

  def select_using_dropdown(dropdown_type, selection, commit: false)
    dropdown = find(".js-compare-#{dropdown_type}-dropdown")
    dropdown.find(".compare-dropdown-toggle").click
    # find input before using to wait for the inputs visiblity
    dropdown.find('.dropdown-menu')
    dropdown.fill_in("Filter by Git revision", with: selection)
    wait_for_requests

    if commit
      dropdown.find('input[type="search"]').send_keys(:return)
    else
      # find before all to wait for the items visiblity
      dropdown.find("a[data-ref=\"#{selection}\"]", match: :first)
      dropdown.all("a[data-ref=\"#{selection}\"]").last.click
    end
  end
end