# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Projects::TreeController, feature_category: :source_code_management do
  let_it_be(:project) { create(:project, :repository) }
  let(:user) { create(:user) }

  context 'user unauthenticated' do
    let_it_be(:project) { create(:project, :repository, :public) }

    describe "GET show" do
      before do
        Gon.clear
      end

      let(:params) do
        {
          namespace_id: project.namespace.to_param, project_id: project, id: id, ref_type: ref_type
        }
      end

      let(:request) { get :show, params: params }
      let(:id) { 'master' }
      let(:ref_type) { 'heads' }

      it 'is successful' do
        request
        expect(Gon.all_variables).not_to have_key('show_commit_columns')
        expect(response).to have_gitlab_http_status(:ok)
      end

      context 'when ref is not a default branch' do
        let(:id) { 'feature' }

        it 'disables columns on tree page' do
          request

          expect(Gon.all_variables).to have_key('show_commit_columns')
          expect(Gon.all_variables['show_commit_columns']).to be_falsey
          expect(response).to have_gitlab_http_status(:ok)
        end

        context 'when "require_login_for_commit_tree" FF is disabled' do
          before do
            stub_feature_flags(require_login_for_commit_tree: false)
          end

          it 'is successful' do
            request

            expect(Gon.all_variables).not_to have_key('show_commit_columns')
            expect(response).to have_gitlab_http_status(:ok)
          end
        end
      end
    end
  end

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

      project.add_maintainer(user)
      controller.instance_variable_set(:@project, project)
    end

    describe "GET show" do
      let(:params) do
        {
          namespace_id: project.namespace.to_param, project_id: project, id: id, ref_type: ref_type
        }
      end

      let(:request) { get :show, params: params }

      let(:ref_type) { nil }

      # Make sure any errors accessing the tree in our views bubble up to this spec
      render_views

      include_context 'with ambiguous refs for controllers'

      describe '#set_is_ambiguous_ref before action' do
        before do
          request
        end

        context 'when ref requested is ambiguous with no ref type' do
          let(:id) { 'ambiguous_ref' }

          it_behaves_like '#set_is_ambiguous_ref when ref is ambiguous'
        end

        context 'when ref requested is not ambiguous' do
          let(:id) { 'master' }

          it_behaves_like '#set_is_ambiguous_ref when ref is not ambiguous'
        end
      end

      context "valid branch, no path" do
        let(:id) { 'flatten-dir' }

        it 'checks for tree without ref_type' do
          allow(project.repository).to receive(:tree).and_call_original
          expect(project.repository).to receive(:tree).with(RepoHelpers.another_sample_commit.id, '').and_call_original
          request
        end

        it 'responds with success' do
          request
          expect(response).to be_ok
        end
      end

      context "valid branch, valid path" do
        let(:id) { 'master/encoding/' }

        it 'responds with success' do
          request
          expect(response).to be_ok
        end
      end

      context "valid branch, invalid path" do
        let(:id) { 'master/invalid-path/' }

        it 'redirects' do
          request
          expect(subject)
              .to redirect_to("/#{project.full_path}/-/tree/master")
        end
      end

      context "invalid branch, valid path" do
        let(:id) { 'invalid-branch/encoding/' }

        it 'responds with not_found' do
          request
          expect(subject).to respond_with(:not_found)
        end
      end

      context 'when default branch was renamed' do
        let_it_be_with_reload(:project) { create(:project, :repository, previous_default_branch: 'old-default-branch') }

        context "and the file is valid" do
          let(:id) { 'old-default-branch/encoding/' }

          it 'redirects' do
            request
            expect(subject).to redirect_to("/#{project.full_path}/-/tree/#{project.default_branch}/encoding/")
          end
        end

        context "and the file is invalid" do
          let(:id) { 'old-default-branch/invalid-path/' }

          it 'redirects' do
            request
            expect(subject).to redirect_to("/#{project.full_path}/-/tree/#{project.default_branch}/invalid-path/")
          end
        end
      end

      context "valid empty branch, invalid path" do
        let(:id) { 'empty-branch/invalid-path/' }

        it 'redirects' do
          request
          expect(subject).to redirect_to("/#{project.full_path}/-/tree/empty-branch")
        end
      end

      context "valid empty branch" do
        let(:id) { 'empty-branch' }

        it 'responds with success' do
          request
          expect(response).to be_ok
        end
      end

      context "invalid SHA commit ID" do
        let(:id) { 'ff39438/.gitignore' }

        it 'responds with not_found' do
          request
          expect(subject).to respond_with(:not_found)
        end
      end

      context "valid SHA commit ID" do
        let(:id) { '6d39438' }

        it 'responds with success' do
          request
          expect(response).to be_ok
        end

        context 'and there is a tag with the same name' do
          before do
            project.repository.add_tag(project.creator, id, RepoHelpers.sample_commit.id)
          end

          it 'responds with success' do
            request

            # This uses the tag
            # TODO: Should we redirect in this case?
            expect(response).to be_ok
          end
        end
      end

      context "valid SHA commit ID with path" do
        let(:id) { '6d39438/.gitignore' }

        it 'responds with found' do
          request
          expect(response).to have_gitlab_http_status(:found)
        end
      end
    end

    describe 'GET show with whitespace in ref' do
      render_views

      let(:id) { "this ref/api/responses" }

      it 'does not call make a Gitaly request' do
        allow(::Gitlab::GitalyClient).to receive(:call).and_call_original
        expect(::Gitlab::GitalyClient).not_to receive(:call).with(anything, :commit_service, :find_commit, anything, anything)

        get :show, params: {
          namespace_id: project.namespace.to_param, project_id: project, id: id
        }

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

    describe 'GET show with blob path' do
      render_views

      before do
        get :show, params: {
          namespace_id: project.namespace.to_param, project_id: project, id: id, ref_type: 'heads'
        }
      end

      context 'redirect to blob' do
        let(:id) { 'master/README.md' }

        it 'redirects' do
          redirect_url = "/#{project.full_path}/-/blob/master/README.md?ref_type=heads"
          expect(subject).to redirect_to(redirect_url)
        end
      end
    end

    describe '#create_dir' do
      subject(:create_dir) { post :create_dir, params: params }

      let(:create_merge_request) { nil }
      let(:params) do
        {
          namespace_id: project.namespace.to_param,
          project_id: project,
          id: 'master',
          dir_name: path,
          branch_name: branch_name,
          commit_message: 'Test commit message',
          create_merge_request: create_merge_request
        }
      end

      render_views

      context 'successful creation' do
        let(:path) { 'files/new_dir' }
        let(:branch_name) { "main-test-#{SecureRandom.hex}" }

        context 'when not creating a new MR' do
          let(:create_merge_request) { 'false' }

          it 'redirects to the new directory' do
            expect(create_dir)
                .to redirect_to("/#{project.full_path}/-/tree/#{branch_name}/#{path}")
            expect(flash[:notice]).to eq('The directory has been successfully created.')
          end
        end

        context 'when creating a new MR' do
          shared_examples 'a new MR from branch redirection' do
            it 'redirects to the new MR page' do
              expect(create_dir)
                  .to redirect_to("/#{project.full_path}/-/merge_requests/new?merge_request%5Bsource_branch%5D=#{branch_name}&merge_request%5Btarget_branch%5D=master&merge_request%5Btarget_project_id%5D=#{project.id}")
              expect(flash[:notice]).to eq('The directory has been successfully created. You can now submit a merge request to get this change into the original branch.')
            end
          end

          context "and the passed create_merge_request value is true" do
            it_behaves_like 'a new MR from branch redirection' do
              let(:create_merge_request) { true }
            end
          end

          context "and the passed create_merge_request value is 'true'" do
            it_behaves_like 'a new MR from branch redirection' do
              let(:create_merge_request) { 'true' }
            end
          end

          context "and the passed create_merge_request value is '1'" do
            it_behaves_like 'a new MR from branch redirection' do
              let(:create_merge_request) { '1' }
            end
          end

          context "and the passed create_merge_request value is 1" do
            it_behaves_like 'a new MR from branch redirection' do
              let(:create_merge_request) { 1 }
            end
          end

          context 'and the merge request already exists' do
            let(:create_merge_request) { true }
            let(:merge_request) { create(:merge_request, source_project: project) }

            it 'redirects to the merge_request details page without flash notice' do
              allow(controller).to receive(:merge_request_exists?) do
                controller.instance_variable_set(:@merge_request, merge_request)
                merge_request
              end

              expect(create_dir).to redirect_to(project_merge_request_path(project, merge_request))
              expect(flash[:notice]).to be_nil
            end
          end
        end
      end

      context 'unsuccessful creation' do
        let(:path) { 'README.md' }
        let(:branch_name) { 'master' }

        it 'does not allow overwriting of existing files' do
          expect(create_dir)
              .to redirect_to("/#{project.full_path}/-/tree/master")
          expect(flash[:alert]).to eq('A file with this name already exists')
        end

        [:branch_name, :dir_name, :commit_message].each do |required_param|
          context "when #{required_param} is missing" do
            let(:params) { super().except(required_param) }

            it 'raises a missing parameter exception' do
              expect { create_dir }.to raise_error(ActionController::ParameterMissing)
            end
          end

          context "when #{required_param} is empty" do
            let(:params) { super().merge(required_param => nil) }

            it 'raises a missing parameter exception' do
              expect { create_dir }.to raise_error(ActionController::ParameterMissing)
            end
          end
        end

        context 'when is not authorized to edit the tree' do
          before do
            allow(controller).to receive(:can_collaborate_with_project?).and_return(false)
          end

          it 'renders a not_found error and template' do
            create_dir

            expect(response).to have_gitlab_http_status(:not_found)
            expect(response).to render_template('errors/not_found')
          end
        end
      end
    end
  end
end
