# spec/mailers/welcome_mailer_spec.rb
require 'rails_helper'

RSpec.describe NotificationMailer, type: :mailer do
  describe '#lightning_sats_received' do

    context "without PGP key" do
      let(:user) { create(:user, cn: "phil", email: 'phil@example.com') }

      before do
        allow_any_instance_of(User).to receive(:ldap_entry).and_return({
          uid: user.cn, ou: user.ou, display_name: nil, pgp_key: nil
        })
      end

      describe "unencrypted email" do
        let(:mail) { described_class.with(user: user, amount_sats: 21000).lightning_sats_received }

        it 'renders the correct to/from headers' do
          expect(mail.to).to eq([user.email])
          expect(mail.from).to eq(['accounts@kosmos.org'])
        end

        it 'renders the correct subject' do
          expect(mail.subject).to eq('Sats received')
        end

        it 'uses the correct content type' do
          expect(mail.header['content-type'].to_s).to include('text/plain')
        end

        it 'renders the body with correct content' do
          expect(mail.body.encoded).to match(/You just received 21,000 sats/)
          expect(mail.body.encoded).to include(user.address)
        end

        it 'includes a link to the lightning service page' do
          expect(mail.body.encoded).to include("https://accounts.kosmos.org/services/lightning")
        end
      end
    end

    context "with PGP key" do
      let(:pgp_pubkey) { File.read("#{Rails.root}/spec/fixtures/files/pgp_key_valid_alice.asc") }
      let(:pgp_fingerprint) { "EB85BB5FA33A75E15E944E63F231550C4F47E38E" }
      let(:user) { create(:user, id: 2, cn: "alice", email: 'alice@example.com', pgp_fpr: pgp_fingerprint) }

      before do
        allow_any_instance_of(User).to receive(:ldap_entry).and_return({
          uid: user.cn, ou: user.ou, display_name: nil, pgp_key: pgp_pubkey
        })
      end

      describe "encrypted email" do
        let(:mail) { described_class.with(user: user, amount_sats: 21000).lightning_sats_received }

        it 'renders the correct to/from headers' do
          expect(mail.to).to eq([user.email])
          expect(mail.from).to eq(['accounts@kosmos.org'])
        end

        it 'encrypts the subject line' do
          expect(mail.subject).to eq('...')
        end

        it 'uses the correct content type' do
          expect(mail.header['content-type'].to_s).to include('multipart/encrypted')
          expect(mail.header['content-type'].to_s).to include('protocol="application/pgp-encrypted"')
        end

        it 'renders the PGP version part' do
          expect(mail.body.encoded).to include("Content-Type: application/pgp-encrypted")
          expect(mail.body.encoded).to include("Content-Description: PGP/MIME version identification")
          expect(mail.body.encoded).to include("Version: 1")
        end

        it 'renders the encrypted PGP part' do
          expect(mail.body.encoded).to include('Content-Type: application/octet-stream; name="encrypted.asc"')
          expect(mail.body.encoded).to include('Content-Description: OpenPGP encrypted message')
          expect(mail.body.encoded).to include('Content-Disposition: inline; filename="encrypted.asc"')
          expect(mail.body.encoded).to include('-----BEGIN PGP MESSAGE-----')
          expect(mail.body.encoded).to include('hF4DR')
        end
      end
    end
  end
end