# frozen_string_literal: true

require 'spec_helper'

RSpec.describe EmailsOnPushWorker, :mailer, feature_category: :source_code_management do
  include EmailSpec::Matchers

  let_it_be(:project) { create(:project, :repository) }
  let_it_be(:user) { create(:user) }

  let(:data) { Gitlab::DataBuilder::Push.build_sample(project, user) }
  let(:recipients) { user.email }
  let(:perform) { subject.perform(project.id, recipients, data.stringify_keys) }
  let(:email) { ActionMailer::Base.deliveries.last }

  subject { described_class.new }

  describe "#perform" do
    context "when push is a new branch" do
      before do
        data_new_branch = data.stringify_keys.merge("before" => Gitlab::Git::SHA1_BLANK_SHA)

        subject.perform(project.id, recipients, data_new_branch)
      end

      it "sends a mail with the correct subject" do
        expect(email.subject).to include("Pushed new branch")
      end

      it "sends the mail to the correct recipient" do
        expect(email.to).to eq([user.email])
      end
    end

    context "when push is a deleted branch" do
      before do
        data_deleted_branch = data.stringify_keys.merge("after" => Gitlab::Git::SHA1_BLANK_SHA)

        subject.perform(project.id, recipients, data_deleted_branch)
      end

      it "sends a mail with the correct subject" do
        expect(email.subject).to include("Deleted branch")
      end

      it "sends the mail to the correct recipient" do
        expect(email.to).to eq([user.email])
      end
    end

    context "when push is a force push to delete commits" do
      before do
        data_force_push = data.stringify_keys.merge(
          "after" => data[:before],
          "before" => data[:after]
        )

        subject.perform(project.id, recipients, data_force_push)
      end

      it "sends a mail with the correct subject" do
        expect(email.subject).to include('adds bar folder and branch-test text file')
      end

      it "mentions force pushing in the body" do
        expect(email).to have_body_text("force push")
      end

      it "sends the mail to the correct recipient" do
        expect(email.to).to eq([user.email])
      end
    end

    context "when there are no errors in sending" do
      before do
        perform
      end

      it "sends a mail with the correct subject" do
        expect(email.subject).to include('adds bar folder and branch-test text file')
      end

      it "does not mention force pushing in the body" do
        expect(email).not_to have_body_text("force push")
      end

      it "sends the mail to the correct recipient" do
        expect(email.to).to eq([user.email])
      end
    end

    context "when there is an SMTP error" do
      before do
        allow(Notify).to receive(:repository_push_email).and_raise(Net::SMTPFatalError.new(nil))
        allow(subject).to receive_message_chain(:logger, :info)
        perform
      end

      it "gracefully handles an input SMTP error" do
        expect(ActionMailer::Base.deliveries).to be_empty
      end
    end

    context "when there are multiple recipients" do
      before do
        # This is a hack because we modify the mail object before sending, for efficiency,
        # but the TestMailer adapter just appends the objects to an array. To clone a mail
        # object, create a new one!
        #   https://github.com/mikel/mail/issues/314#issuecomment-12750108
        allow_any_instance_of(Mail::TestMailer).to receive(:deliver!).and_wrap_original do |original, mail|
          original.call(Mail.new(mail.encoded))
        end
      end

      context "with mixed-case recipient" do
        let(:recipients) { user.email.upcase }

        it "retains the case" do
          perform

          expect(email_recipients).to contain_exactly(recipients)
        end
      end

      context "when the recipient addresses are a list of email addresses" do
        let(:recipients) do
          1.upto(5).map { |i| user.email.sub('@', "+#{i}@") }.join("\n")
        end

        it "sends the mail to each of the recipients" do
          perform

          expect(email_recipients).to contain_exactly(*recipients.split)
        end

        it "only generates the mail once" do
          expect(Notify).to receive(:repository_push_email).once.and_call_original
          expect(Premailer::Rails::CustomizedPremailer).to receive(:new).once.and_call_original

          perform
        end

        context 'when SMIME signing is enabled' do
          include SmimeHelper

          before :context do
            @root_ca = generate_root
            @cert = generate_cert(signer_ca: @root_ca)
          end

          let(:root_certificate) do
            Gitlab::X509::Certificate.new(@root_ca[:key], @root_ca[:cert])
          end

          let(:certificate) do
            Gitlab::X509::Certificate.new(@cert[:key], @cert[:cert])
          end

          before do
            allow(Gitlab::Email::Hook::SmimeSignatureInterceptor).to receive(:certificate).and_return(certificate)

            Mail.register_interceptor(Gitlab::Email::Hook::SmimeSignatureInterceptor)
          end

          after do
            Mail.unregister_interceptor(Gitlab::Email::Hook::SmimeSignatureInterceptor)
          end

          it 'does not sign the email multiple times' do
            perform

            ActionMailer::Base.deliveries.each do |mail|
              expect(mail.header['Content-Type'].value).to match('multipart/signed').and match('protocol="application/x-pkcs7-signature"')

              expect(mail.to_s.scan(/Content-Disposition: attachment;\r\n filename=smime.p7s/).size).to eq(1)
            end
          end
        end
      end

      context "when recipients are invalid" do
        let(:recipients) { "invalid\n\nrecipients" }

        it "ignores them" do
          perform

          expect(ActionMailer::Base.deliveries).to be_empty
        end
      end

      context "when the recipient addresses contains angle brackets and are separated by spaces" do
        let(:recipients) { "John Doe <johndoe@example.com> Jane Doe <janedoe@example.com>" }

        it "accepts emails separated by whitespace" do
          perform

          expect(email_recipients).to contain_exactly("johndoe@example.com", "janedoe@example.com")
        end
      end

      context "when the recipient addresses contain a mix of emails with and without angle brackets" do
        let(:recipients) { "johndoe@example.com Jane Doe <janedoe@example.com>" }

        it "accepts both kind of emails" do
          perform

          expect(email_recipients).to contain_exactly("johndoe@example.com", "janedoe@example.com")
        end
      end

      context "when the recipient addresses contains angle brackets and are separated by newlines" do
        let(:recipients) { "John Doe <johndoe@example.com>\nJane Doe <janedoe@example.com>" }

        it "accepts emails separated by newlines" do
          perform

          expect(email_recipients).to contain_exactly("johndoe@example.com", "janedoe@example.com")
        end
      end

      context 'when the recipient addresses contains duplicates' do
        let(:recipients) { 'non@dubplicate.com Duplic@te.com duplic@te.com Duplic@te.com duplic@Te.com' }

        it 'deduplicates recipients while treating the domain part as case-insensitive' do
          perform

          expect(email_recipients).to contain_exactly('non@dubplicate.com', 'Duplic@te.com')
        end
      end
    end
  end
end