# frozen_string_literal: true

require 'spec_helper'

RSpec.describe SnippetsController do
  let_it_be(:user) { create(:user) }

  describe 'GET #index' do
    context 'when username parameter is present' do
      it_behaves_like 'paginated collection' do
        let(:collection) { Snippet.all }
        let(:params) { { username: user.username } }

        before do
          create(:personal_snippet, :public, author: user)
        end
      end

      it 'renders snippets of a user when username is present' do
        get :index, params: { username: user.username }

        expect(response).to render_template(:index)
      end
    end

    context 'when username parameter is not present' do
      it 'redirects to explore snippets page when user is not logged in' do
        get :index

        expect(response).to redirect_to(explore_snippets_path)
      end

      it 'redirects to snippets dashboard page when user is logged in' do
        sign_in(user)

        get :index

        expect(response).to redirect_to(dashboard_snippets_path)
      end
    end
  end

  describe 'GET #new' do
    context 'when signed in' do
      before do
        sign_in(user)
      end

      it 'responds with status 200' do
        get :new

        expect(response).to have_gitlab_http_status(:ok)
      end

      context 'when user is not allowed to create a personal snippet' do
        let(:user) { create(:user, :external) }

        it 'responds with status 404' do
          get :new

          expect(response).to have_gitlab_http_status(:not_found)
        end
      end
    end

    context 'when not signed in' do
      it 'redirects to the sign in page' do
        get :new

        expect(response).to redirect_to(new_user_session_path)
      end
    end
  end

  describe 'GET #show' do
    shared_examples 'successful response' do
      it 'renders the snippet' do
        subject

        expect(assigns(:snippet)).to eq(personal_snippet)
        expect(response).to have_gitlab_http_status(:ok)
      end

      it 'renders the blob from the repository' do
        subject

        expect(assigns(:blob)).to eq(personal_snippet.blobs.first)
      end
    end

    context 'when the personal snippet is private' do
      let_it_be(:personal_snippet) { create(:personal_snippet, :private, :repository, author: user) }

      context 'when signed in' do
        before do
          sign_in(user)
        end

        context 'when signed in user is not the author' do
          let(:other_author) { create(:author) }
          let(:other_personal_snippet) { create(:personal_snippet, :private, author: other_author) }

          it 'responds with status 404' do
            get :show, params: { id: other_personal_snippet.to_param }

            expect(response).to have_gitlab_http_status(:not_found)
          end
        end

        context 'when signed in user is the author' do
          it_behaves_like 'successful response' do
            subject { get :show, params: { id: personal_snippet.to_param } }
          end

          it 'responds with status 404 when embeddable content is requested' do
            get :show, params: { id: personal_snippet.to_param }, format: :js

            expect(response).to have_gitlab_http_status(:not_found)
          end
        end
      end

      context 'when not signed in' do
        it 'redirects to the sign in page' do
          get :show, params: { id: personal_snippet.to_param }

          expect(response).to redirect_to(new_user_session_path)
        end
      end
    end

    context 'when the personal snippet is internal' do
      let_it_be(:personal_snippet) { create(:personal_snippet, :internal, :repository, author: user) }

      context 'when signed in' do
        before do
          sign_in(user)
        end

        it_behaves_like 'successful response' do
          subject { get :show, params: { id: personal_snippet.to_param } }
        end

        it 'responds with status 404 when embeddable content is requested' do
          get :show, params: { id: personal_snippet.to_param }, format: :js

          expect(response).to have_gitlab_http_status(:not_found)
        end
      end

      context 'when not signed in' do
        it 'redirects to the sign in page' do
          get :show, params: { id: personal_snippet.to_param }

          expect(response).to redirect_to(new_user_session_path)
        end
      end
    end

    context 'when the personal snippet is public' do
      let_it_be(:personal_snippet) { create(:personal_snippet, :public, :repository, author: user) }

      context 'when signed in' do
        before do
          sign_in(user)
        end

        it_behaves_like 'successful response' do
          subject { get :show, params: { id: personal_snippet.to_param } }
        end

        it 'responds with status 200 when embeddable content is requested' do
          get :show, params: { id: personal_snippet.to_param }, format: :js

          expect(assigns(:snippet)).to eq(personal_snippet)
          expect(response).to have_gitlab_http_status(:ok)
        end
      end

      context 'when not signed in' do
        it 'renders the snippet' do
          get :show, params: { id: personal_snippet.to_param }

          expect(assigns(:snippet)).to eq(personal_snippet)
          expect(response).to have_gitlab_http_status(:ok)
        end
      end
    end

    context 'when the personal snippet does not exist' do
      context 'when signed in' do
        before do
          sign_in(user)
        end

        it 'responds with status 404' do
          get :show, params: { id: 'doesntexist' }

          expect(response).to have_gitlab_http_status(:not_found)
        end
      end

      context 'when not signed in' do
        it 'responds with status 404' do
          get :show, params: { id: 'doesntexist' }

          expect(response).to redirect_to(new_user_session_path)
        end
      end
    end
  end

  describe 'POST #create' do
    def create_snippet(snippet_params = {}, additional_params = {})
      sign_in(user)

      post :create, params: {
        personal_snippet: { title: 'Title', content: 'Content', description: 'Description' }.merge(snippet_params)
      }.merge(additional_params)

      Snippet.last
    end

    it 'creates the snippet correctly' do
      snippet = create_snippet(visibility_level: Snippet::PRIVATE)

      expect(snippet.title).to eq('Title')
      expect(snippet.content).to eq('Content')
      expect(snippet.description).to eq('Description')
    end

    context 'when user is not allowed to create a personal snippet' do
      let(:user) { create(:user, :external) }

      it 'responds with status 404' do
        aggregate_failures do
          expect do
            create_snippet(visibility_level: Snippet::PUBLIC)
          end.not_to change { Snippet.count }

          expect(response).to have_gitlab_http_status(:not_found)
        end
      end
    end

    context 'when the controller receives the files param' do
      let(:files) { %w(foo bar) }

      it 'passes the files param to the snippet create service' do
        expect(Snippets::CreateService).to receive(:new).with(nil, user, hash_including(files: files)).and_call_original

        create_snippet({ title: nil }, { files: files })
      end
    end

    context 'when the snippet is spam' do
      before do
        allow_next_instance_of(Spam::AkismetService) do |instance|
          allow(instance).to receive(:spam?).and_return(true)
        end
      end

      context 'when the snippet is private' do
        it 'creates the snippet' do
          expect { create_snippet(visibility_level: Snippet::PRIVATE) }
            .to change { Snippet.count }.by(1)
        end
      end

      context 'when the snippet is public' do
        it 'rejects the snippet' do
          expect { create_snippet(visibility_level: Snippet::PUBLIC) }
            .not_to change { Snippet.count }
        end

        it 'creates a spam log' do
          expect { create_snippet(visibility_level: Snippet::PUBLIC) }
            .to log_spam(title: 'Title', user: user, noteable_type: 'PersonalSnippet')
        end

        it 'renders :new with reCAPTCHA disabled' do
          stub_application_setting(recaptcha_enabled: false)

          create_snippet(visibility_level: Snippet::PUBLIC)

          expect(response).to render_template(:new)
        end

        context 'reCAPTCHA enabled' do
          before do
            stub_application_setting(recaptcha_enabled: true)
          end

          it 'renders :verify' do
            create_snippet(visibility_level: Snippet::PUBLIC)

            expect(response).to render_template(:verify)
          end

          it 'renders snippet page' do
            spammy_title = 'Whatever'

            spam_logs = create_list(:spam_log, 2, user: user, title: spammy_title)
            snippet = create_snippet({ title: spammy_title },
                                     { spam_log_id: spam_logs.last.id,
                                       recaptcha_verification: true })

            expect(response).to redirect_to(snippet_path(snippet))
          end
        end
      end
    end
  end

  describe 'PUT #update' do
    let(:project) { create :project }
    let(:visibility_level) { Snippet::PUBLIC }
    let(:snippet) { create :personal_snippet, author: user, project: project, visibility_level: visibility_level }

    def update_snippet(snippet_params = {}, additional_params = {})
      sign_in(user)

      put :update, params: {
        id: snippet.id,
        personal_snippet: { title: 'Title', content: 'Content' }.merge(snippet_params)
      }.merge(additional_params)

      snippet.reload
    end

    it_behaves_like 'updating snippet checks blob is binary' do
      let_it_be(:title) { 'Foo' }

      subject { put :update, params: { id: snippet, personal_snippet: { title: title } } }
    end

    context 'when the snippet is spam' do
      before do
        allow_next_instance_of(Spam::AkismetService) do |instance|
          allow(instance).to receive(:spam?).and_return(true)
        end
      end

      context 'when the snippet is private' do
        let(:visibility_level) { Snippet::PRIVATE }

        it 'updates the snippet' do
          expect { update_snippet(title: 'Foo') }
            .to change { snippet.reload.title }.to('Foo')
        end
      end

      context 'when a private snippet is made public' do
        let(:visibility_level) { Snippet::PRIVATE }

        it 'rejects the snippet' do
          expect { update_snippet(title: 'Foo', visibility_level: Snippet::PUBLIC) }
            .not_to change { snippet.reload.title }
        end

        it 'creates a spam log' do
          expect { update_snippet(title: 'Foo', visibility_level: Snippet::PUBLIC) }
            .to log_spam(title: 'Foo', user: user, noteable_type: 'PersonalSnippet')
        end

        it 'renders :edit with reCAPTCHA disabled' do
          stub_application_setting(recaptcha_enabled: false)

          update_snippet(title: 'Foo', visibility_level: Snippet::PUBLIC)

          expect(response).to render_template(:edit)
        end

        context 'reCAPTCHA enabled' do
          before do
            stub_application_setting(recaptcha_enabled: true)
          end

          it 'renders :verify' do
            update_snippet(title: 'Foo', visibility_level: Snippet::PUBLIC)

            expect(response).to render_template(:verify)
          end

          it 'renders snippet page when reCAPTCHA verified' do
            spammy_title = 'Whatever'

            spam_logs = create_list(:spam_log, 2, user: user, title: spammy_title)
            snippet = update_snippet({ title: spammy_title, visibility_level: Snippet::PUBLIC },
                                     { spam_log_id: spam_logs.last.id,
                                       recaptcha_verification: true })

            expect(response).to redirect_to(snippet_path(snippet))
          end
        end
      end

      context 'when the snippet is public' do
        it 'rejects the snippet' do
          expect { update_snippet(title: 'Foo') }
            .not_to change { snippet.reload.title }
        end

        it 'creates a spam log' do
          expect {update_snippet(title: 'Foo') }
            .to log_spam(title: 'Foo', user: user, noteable_type: 'PersonalSnippet')
        end

        it 'renders :edit with reCAPTCHA disabled' do
          stub_application_setting(recaptcha_enabled: false)

          update_snippet(title: 'Foo')

          expect(response).to render_template(:edit)
        end

        context 'recaptcha enabled' do
          before do
            stub_application_setting(recaptcha_enabled: true)
          end

          it 'renders :verify' do
            update_snippet(title: 'Foo')

            expect(response).to render_template(:verify)
          end

          it 'renders snippet page when reCAPTCHA verified' do
            spammy_title = 'Whatever'

            spam_logs = create_list(:spam_log, 2, user: user, title: spammy_title)
            snippet = update_snippet({ title: spammy_title },
                                     { spam_log_id: spam_logs.last.id,
                                       recaptcha_verification: true })

            expect(response).to redirect_to(snippet_path(snippet))
          end
        end
      end
    end
  end

  describe 'POST #mark_as_spam' do
    let(:snippet) { create(:personal_snippet, :public, author: user) }

    before do
      allow_next_instance_of(Spam::AkismetService) do |instance|
        allow(instance).to receive_messages(submit_spam: true)
      end
      stub_application_setting(akismet_enabled: true)
    end

    def mark_as_spam
      admin = create(:admin)
      create(:user_agent_detail, subject: snippet)
      sign_in(admin)

      post :mark_as_spam, params: { id: snippet.id }
    end

    it 'updates the snippet' do
      mark_as_spam

      expect(snippet.reload).not_to be_submittable_as_spam
    end
  end

  describe "GET #raw" do
    let(:inline) { nil }
    let(:params) { { id: snippet.to_param, inline: inline } }

    subject { get :raw, params: params }

    shared_examples '200 status' do
      before do
        subject
      end

      it 'responds with status 200' do
        expect(assigns(:snippet)).to eq(snippet)
        expect(response).to have_gitlab_http_status(:ok)
      end

      it "sets #{Gitlab::Workhorse::DETECT_HEADER} header" do
        expect(response.header[Gitlab::Workhorse::DETECT_HEADER]).to eq 'true'
      end
    end

    shared_examples 'CRLF line ending' do
      let(:content) { "first line\r\nsecond line\r\nthird line" }
      let(:formatted_content) { content.gsub(/\r\n/, "\n") }
      let(:snippet) do
        create(:personal_snippet, :public, :repository, author: user, content: content)
      end

      before do
        allow_next_instance_of(Blob) do |instance|
          allow(instance).to receive(:data).and_return(content)
        end

        subject
      end

      it 'returns LF line endings by default' do
        expect(response.body).to eq(formatted_content)
      end

      context 'when parameter present' do
        let(:params) { { id: snippet.to_param, line_ending: :raw } }

        it 'does not convert line endings when parameter present' do
          expect(response.body).to eq(content)
        end
      end
    end

    shared_examples 'successful response' do
      it_behaves_like '200 status'

      it 'has expected blob headers' do
        subject

        expect(response.header[Gitlab::Workhorse::SEND_DATA_HEADER]).to start_with('git-blob:')
        expect(response.header[Gitlab::Workhorse::DETECT_HEADER]).to eq 'true'
      end

      it_behaves_like 'content disposition headers'

      it 'sets cache_control public header based on snippet visibility' do
        subject

        expect(response.cache_control[:public]).to eq snippet.public?
      end

      context 'when snippet repository is empty' do
        before do
          allow_any_instance_of(Repository).to receive(:empty?).and_return(true)
        end

        it_behaves_like '200 status'
        it_behaves_like 'CRLF line ending'

        it 'returns snippet database content' do
          subject

          expect(response.body).to eq snippet.content
          expect(response.header['Content-Type']).to eq('text/plain; charset=utf-8')
        end

        it_behaves_like 'content disposition headers'
      end
    end

    context 'when the personal snippet is private' do
      let_it_be(:snippet) { create(:personal_snippet, :private, :repository, author: user) }

      context 'when signed in' do
        before do
          sign_in(user)
        end

        context 'when signed in user is not the author' do
          let(:other_author) { create(:author) }
          let(:other_personal_snippet) { create(:personal_snippet, :private, author: other_author) }

          it 'responds with status 404' do
            get :raw, params: { id: other_personal_snippet.to_param }

            expect(response).to have_gitlab_http_status(:not_found)
          end
        end

        context 'when signed in user is the author' do
          it_behaves_like 'successful response'
        end
      end

      context 'when not signed in' do
        it 'redirects to the sign in page' do
          subject

          expect(response).to redirect_to(new_user_session_path)
        end
      end
    end

    context 'when the personal snippet is internal' do
      let_it_be(:snippet) { create(:personal_snippet, :internal, :repository, author: user) }

      context 'when signed in' do
        before do
          sign_in(user)
        end

        it_behaves_like 'successful response'
      end

      context 'when not signed in' do
        it 'redirects to the sign in page' do
          subject

          expect(response).to redirect_to(new_user_session_path)
        end
      end
    end

    context 'when the personal snippet is public' do
      let_it_be(:snippet) { create(:personal_snippet, :public, :repository, author: user) }

      context 'when signed in' do
        before do
          sign_in(user)
        end

        it_behaves_like 'successful response'
      end

      context 'when not signed in' do
        it 'responds with status 200' do
          subject

          expect(assigns(:snippet)).to eq(snippet)
          expect(response).to have_gitlab_http_status(:ok)
        end
      end
    end

    context 'when the personal snippet does not exist' do
      context 'when signed in' do
        before do
          sign_in(user)
        end

        it 'responds with status 404' do
          get :raw, params: { id: 'doesntexist' }

          expect(response).to have_gitlab_http_status(:not_found)
        end
      end

      context 'when not signed in' do
        it 'redirects to the sign in path' do
          get :raw, params: { id: 'doesntexist' }

          expect(response).to redirect_to(new_user_session_path)
        end
      end
    end
  end

  context 'award emoji on snippets' do
    let(:personal_snippet) { create(:personal_snippet, :public, author: user) }
    let(:another_user) { create(:user) }

    before do
      sign_in(another_user)
    end

    describe 'POST #toggle_award_emoji' do
      it "toggles the award emoji" do
        expect do
          post(:toggle_award_emoji, params: { id: personal_snippet.to_param, name: "thumbsup" })
        end.to change { personal_snippet.award_emoji.count }.from(0).to(1)

        expect(response).to have_gitlab_http_status(:ok)
      end

      it "removes the already awarded emoji" do
        post(:toggle_award_emoji, params: { id: personal_snippet.to_param, name: "thumbsup" })

        expect do
          post(:toggle_award_emoji, params: { id: personal_snippet.to_param, name: "thumbsup" })
        end.to change { personal_snippet.award_emoji.count }.from(1).to(0)

        expect(response).to have_gitlab_http_status(:ok)
      end
    end
  end

  describe 'POST #preview_markdown' do
    let(:snippet) { create(:personal_snippet, :public) }

    it 'renders json in a correct format' do
      sign_in(user)

      post :preview_markdown, params: { id: snippet, text: '*Markdown* text' }

      expect(json_response.keys).to match_array(%w(body references))
    end
  end

  describe 'DELETE #destroy' do
    let!(:snippet) { create :personal_snippet, author: user }

    context 'when current user has ability to destroy the snippet' do
      before do
        sign_in(user)
      end

      it 'removes the snippet' do
        delete :destroy, params: { id: snippet.to_param }

        expect { snippet.reload }.to raise_error(ActiveRecord::RecordNotFound)
      end

      context 'when snippet is succesfuly destroyed' do
        it 'redirects to the project snippets page' do
          delete :destroy, params: { id: snippet.to_param }

          expect(response).to redirect_to(dashboard_snippets_path)
        end
      end

      context 'when snippet is not destroyed' do
        before do
          allow(snippet).to receive(:destroy).and_return(false)
          controller.instance_variable_set(:@snippet, snippet)
        end

        it 'renders the snippet page with errors' do
          delete :destroy, params: { id: snippet.to_param }

          expect(flash[:alert]).to eq('Failed to remove snippet.')
          expect(response).to redirect_to(snippet_path(snippet))
        end
      end
    end

    context 'when current_user does not have ability to destroy the snippet' do
      let(:another_user) { create(:user) }

      before do
        sign_in(another_user)
      end

      it 'responds with status 404' do
        delete :destroy, params: { id: snippet.to_param }

        expect(response).to have_gitlab_http_status(:not_found)
      end
    end
  end

  describe 'GET #edit' do
    it_behaves_like 'editing snippet checks blob is binary' do
      let_it_be(:snippet) { create(:personal_snippet, :public, :repository, author: user) }

      subject { get :edit, params: { id: snippet } }
    end
  end
end