require "spec_helper"

describe Gitlab::Email::Receiver, lib: true do
  before do
    stub_incoming_email_setting(enabled: true, address: "reply+%{key}@appmail.adventuretime.ooo")
    stub_config_setting(host: 'localhost')
  end

  let(:mail_key)  { "59d8df8370b7e95c5a49fbf86aeb2c93" }
  let(:email_raw) { fixture_file('emails/valid_reply.eml') }

  let(:project)   { create(:project, :public) }
  let(:noteable)  { create(:issue, project: project) }
  let(:user)      { create(:user) }
  let!(:sent_notification) { SentNotification.record(noteable, user.id, mail_key) }

  let(:receiver) { described_class.new(email_raw) }
  let(:markdown) { "![image](uploads/image.png)" }

  def setup_attachment
    allow_any_instance_of(Gitlab::Email::AttachmentUploader).to receive(:execute).and_return(
      [
        {
          url: "uploads/image.png",
          is_image: true,
          alt: "image",
          markdown: markdown
        }
      ]
    )
  end

  context "when the recipient address doesn't include a mail key" do
    let(:email_raw) { fixture_file('emails/valid_reply.eml').gsub(mail_key, "") }

    it "raises a SentNotificationNotFoundError" do
      expect { receiver.execute }.to raise_error(Gitlab::Email::SentNotificationNotFoundError)
    end
  end

  context "when no sent notification for the mail key could be found" do
    let(:email_raw) { fixture_file('emails/wrong_mail_key.eml') }

    it "raises a SentNotificationNotFoundError" do
      expect { receiver.execute }.to raise_error(Gitlab::Email::SentNotificationNotFoundError)
    end
  end

  context "when the email is blank" do
    let(:email_raw) { "" }

    it "raises an EmptyEmailError" do
      expect { receiver.execute }.to raise_error(Gitlab::Email::EmptyEmailError)
    end
  end

  context "when the email was auto generated" do
    let!(:mail_key)  { '636ca428858779856c226bb145ef4fad' }
    let!(:email_raw) { fixture_file("emails/auto_reply.eml") }

    it "raises an AutoGeneratedEmailError" do
      expect { receiver.execute }.to raise_error(Gitlab::Email::AutoGeneratedEmailError)
    end
  end

  context "when the user could not be found" do
    before do
      user.destroy
    end

    it "raises a UserNotFoundError" do
      expect { receiver.execute }.to raise_error(Gitlab::Email::UserNotFoundError)
    end
  end

  context "when the user has been blocked" do
    before do
      user.block
    end

    it "raises a UserBlockedError" do
      expect { receiver.execute }.to raise_error(Gitlab::Email::UserBlockedError)
    end
  end

  context "when the user is not authorized to create a note" do
    before do
      project.update_attribute(:visibility_level, Project::PRIVATE)
    end

    it "raises a ProjectNotFound" do
      expect { receiver.execute }.to raise_error(Gitlab::Email::ProjectNotFound)
    end
  end

  context "when the noteable could not be found" do
    before do
      noteable.destroy
    end

    it "raises a NoteableNotFoundError" do
      expect { receiver.execute }.to raise_error(Gitlab::Email::NoteableNotFoundError)
    end
  end

  context "when the reply is blank" do
    let!(:email_raw) { fixture_file("emails/no_content_reply.eml") }

    it "raises an EmptyEmailError" do
      expect { receiver.execute }.to raise_error(Gitlab::Email::EmptyEmailError)
    end
  end

  context "when the note could not be saved" do
    before do
      allow_any_instance_of(Note).to receive(:persisted?).and_return(false)
    end

    it "raises an InvalidNoteError" do
      expect { receiver.execute }.to raise_error(Gitlab::Email::InvalidNoteError)
    end
  end

  context "when everything is fine" do
    before do
      setup_attachment
    end

    it "creates a comment" do
      expect { receiver.execute }.to change { noteable.notes.count }.by(1)
      note = noteable.notes.last

      expect(note.author).to eq(sent_notification.recipient)
      expect(note.note).to include("I could not disagree more.")
    end

    it "adds all attachments" do
      receiver.execute

      note = noteable.notes.last

      expect(note.note).to include(markdown)
    end

    context 'when sub-addressing is not supported' do
      before do
        stub_incoming_email_setting(enabled: true, address: nil)
      end

      shared_examples 'an email that contains a mail key' do |header|
        it "fetches the mail key from the #{header} header and creates a comment" do
          expect { receiver.execute }.to change { noteable.notes.count }.by(1)
          note = noteable.notes.last

          expect(note.author).to eq(sent_notification.recipient)
          expect(note.note).to include('I could not disagree more.')
        end
      end

      context 'mail key is in the References header' do
        let(:email_raw) { fixture_file('emails/reply_without_subaddressing_and_key_inside_references.eml') }

        it_behaves_like 'an email that contains a mail key', 'References'
      end
    end
  end

  context "when it's trying to create a new issue" do
    before do
      stub_incoming_email_setting(enabled: true, address: "incoming+%{key}@appmail.adventuretime.ooo")
    end

    let(:sent_notification) {}
    let!(:user) do
      create(
        :user,
        email: 'jake@adventuretime.ooo',
        authentication_token: 'auth_token'
      )
    end
    let(:namespace) { create(:namespace, path: 'gitlabhq') }
    let(:project)   { create(:project, :public, namespace: namespace) }
    let(:email_raw) { fixture_file('emails/valid_new_issue.eml') }

    context "when everything is fine" do
      it "creates a new issue" do
        setup_attachment

        expect { receiver.execute }.to change { project.issues.count }.by(1)
        issue = project.issues.last

        expect(issue.author).to eq(user)
        expect(issue.title).to eq('New Issue by email')
        expect(issue.description).to include('reply by email')
        expect(issue.description).to include(markdown)
      end

      context "when the reply is blank" do
        let!(:email_raw) { fixture_file("emails/valid_new_issue_empty.eml") }

        it "creates a new issue" do
          expect { receiver.execute }.to change { project.issues.count }.by(1)
          issue = project.issues.last

          expect(issue.author).to eq(user)
          expect(issue.title).to eq('New Issue by email')
          expect(issue.description).to eq('')
        end
      end
    end

    context "something is wrong" do
      before do
        project
      end

      context "when the issue could not be saved" do
        before do
          allow_any_instance_of(Issue).to receive(:persisted?).and_return(false)
        end

        it "raises an InvalidIssueError" do
          expect { receiver.execute }.to raise_error(Gitlab::Email::InvalidIssueError)
        end
      end

      context "when we can't find the authentication_token" do
        let!(:email_raw) { fixture_file("emails/wrong_authentication_token.eml") }

        it "raises an UserNotFoundError" do
          expect { receiver.execute }.to raise_error(Gitlab::Email::UserNotFoundError)
        end
      end

      context "when project is private" do
        let(:project) { create(:project, :private, namespace: namespace) }

        it "raises a ProjectNotFound if the user is not a member" do
          expect { receiver.execute }.to raise_error(Gitlab::Email::ProjectNotFound)
        end
      end
    end
  end
end