require 'rails_helper'

describe 'Merge request', :js do
  let(:user) { create(:user) }
  let(:project) { create(:project, :repository) }
  let(:merge_request) { create(:merge_request, source_project: project) }

  before do
    project.team << [user, :master]
    sign_in(user)
  end

  context 'new merge request' do
    before do
      visit project_new_merge_request_path(
        project,
        merge_request: {
          source_project_id: project.id,
          target_project_id: project.id,
          source_branch: 'feature',
          target_branch: 'master'
        })
    end

    it 'shows widget status after creating new merge request' do
      click_button 'Submit merge request'

      wait_for_requests

      expect(page).to have_selector('.accept-merge-request')
      expect(find('.accept-merge-request')['disabled']).not_to be(true)
    end
  end

  context 'view merge request' do
    let!(:environment) { create(:environment, project: project) }

    let!(:deployment) do
      create(:deployment, environment: environment,
                          ref: 'feature',
                          sha: merge_request.diff_head_sha)
    end

    before do
      visit project_merge_request_path(project, merge_request)
    end

    it 'shows environments link' do
      wait_for_requests

      page.within('.mr-widget-heading') do
        expect(page).to have_content("Deployed to #{environment.name}")
        expect(find('.js-deploy-url')[:href]).to include(environment.formatted_external_url)
      end
    end

    it 'shows green accept merge request button' do
      # Wait for the `ci_status` and `merge_check` requests
      wait_for_requests
      expect(page).to have_selector('.accept-merge-request')
      expect(find('.accept-merge-request')['disabled']).not_to be(true)
    end
  end

  context 'view merge request with external CI service' do
    before do
      create(:service, project: project,
                       active: true,
                       type: 'CiService',
                       category: 'ci')

      visit project_merge_request_path(project, merge_request)
    end

    it 'has danger button while waiting for external CI status' do
      # Wait for the `ci_status` and `merge_check` requests
      wait_for_requests
      expect(page).to have_selector('.accept-merge-request.btn-danger')
    end
  end

  context 'view merge request with failed GitLab CI pipelines' do
    before do
      commit_status = create(:commit_status, project: project, status: 'failed')
      pipeline = create(:ci_pipeline, project: project,
                                      sha: merge_request.diff_head_sha,
                                      ref: merge_request.source_branch,
                                      status: 'failed',
                                      statuses: [commit_status],
                                      head_pipeline_of: merge_request)
      create(:ci_build, :pending, pipeline: pipeline)

      visit project_merge_request_path(project, merge_request)
    end

    it 'has danger button when not succeeded' do
      # Wait for the `ci_status` and `merge_check` requests
      wait_for_requests
      expect(page).to have_selector('.accept-merge-request.btn-danger')
    end
  end

  context 'when merge request is in the blocked pipeline state' do
    before do
      create(
        :ci_pipeline,
        project: project,
        sha: merge_request.diff_head_sha,
        ref: merge_request.source_branch,
        status: :manual,
        head_pipeline_of: merge_request)

      visit project_merge_request_path(project, merge_request)
    end

    it 'shows information about blocked pipeline' do
      expect(page).to have_content("Pipeline blocked")
      expect(page).to have_content(
        "The pipeline for this merge request requires a manual action")
      expect(page).to have_css('.ci-status-icon-manual')
    end
  end

  context 'view merge request with MWBS button' do
    before do
      commit_status = create(:commit_status, project: project, status: 'pending')
      pipeline = create(:ci_pipeline, project: project,
                                      sha: merge_request.diff_head_sha,
                                      ref: merge_request.source_branch,
                                      status: 'pending',
                                      statuses: [commit_status],
                                      head_pipeline_of: merge_request)
      create(:ci_build, :pending, pipeline: pipeline)

      visit project_merge_request_path(project, merge_request)
    end

    it 'has info button when MWBS button' do
      # Wait for the `ci_status` and `merge_check` requests
      wait_for_requests
      expect(page).to have_selector('.accept-merge-request.btn-info')
    end
  end

  context 'view merge request where project has CI setup but no CI status' do
    before do
      pipeline = create(:ci_pipeline, project: project,
                                      sha: merge_request.diff_head_sha,
                                      ref: merge_request.source_branch)
      create(:ci_build, pipeline: pipeline)

      visit project_merge_request_path(project, merge_request)
    end

    it 'has pipeline error text' do
      # Wait for the `ci_status` and `merge_check` requests
      wait_for_requests

      expect(page).to have_text('Could not connect to the CI server. Please check your settings and try again')
    end
  end

  context 'view merge request with MWPS enabled but automatically merge fails' do
    before do
      merge_request.update(
        merge_when_pipeline_succeeds: true,
        merge_user: merge_request.author,
        merge_error: 'Something went wrong'
      )

      visit project_merge_request_path(project, merge_request)
    end

    it 'shows information about the merge error' do
      # Wait for the `ci_status` and `merge_check` requests
      wait_for_requests

      page.within('.mr-widget-body') do
        expect(page).to have_content('Something went wrong')
      end
    end
  end

  context 'view merge request with MWPS enabled but automatically merge fails' do
    before do
      merge_request.update(
        merge_when_pipeline_succeeds: true,
        merge_user: merge_request.author,
        merge_error: 'Something went wrong'
      )

      visit project_merge_request_path(project, merge_request)
    end

    it 'shows information about the merge error' do
      # Wait for the `ci_status` and `merge_check` requests
      wait_for_requests

      page.within('.mr-widget-body') do
        expect(page).to have_content('Something went wrong')
      end
    end
  end

  context 'merge error' do
    before do
      allow_any_instance_of(Repository).to receive(:merge).and_return(false)
      visit project_merge_request_path(project, merge_request)
    end

    it 'updates the MR widget' do
      click_button 'Merge'

      page.within('.mr-widget-body') do
        expect(page).to have_content('Conflicts detected during merge')
      end
    end
  end

  context 'user can merge into source project but cannot push to fork', js: true do
    let(:fork_project) { create(:project, :public, :repository) }
    let(:user2) { create(:user) }

    before do
      project.team << [user2, :master]
      sign_out(:user)
      sign_in(user2)
      merge_request.update(target_project: fork_project)
      visit project_merge_request_path(project, merge_request)
    end

    it 'user can merge into the source project' do
      expect(page).to have_button('Merge', disabled: false)
    end

    it 'user cannot remove source branch' do
      expect(page).to have_field('remove-source-branch-input', disabled: true)
    end
  end

  context 'ongoing merge process' do
    it 'shows Merging state' do
      allow_any_instance_of(MergeRequest).to receive(:merge_ongoing?).and_return(true)

      visit project_merge_request_path(project, merge_request)

      wait_for_requests

      expect(page).not_to have_button('Merge')
      expect(page).to have_content('This merge request is in the process of being merged')
    end
  end
end