require "test_helper"
require "base64"

class CampaignMailerTest < ActionMailer::TestCase
  test "sends html with merge and attachments from the identity" do
    mailing = create_mailing
    mailing.rebuild_recipients!
    mailing.files.attach(io: StringIO.new("brochure"), filename: "brochure.pdf", content_type: "application/pdf")
    recipient = mailing.mailing_recipients.first

    email = CampaignMailer.outreach(
      recipient,
      html: recipient.rendered_html,
      subject: recipient.rendered_subject_line
    )

    assert_emails 1 do
      email.deliver_now
    end

    assert_equal ["hello@example.com"], email.from
    assert_equal ["mario@asdtest.example.it"], email.to
    assert_equal "Ciao ASD Test Calcio", email.subject
    body = (email.html_part || email).body.to_s
    assert_match(/Ciao Mario Rossi di ASD Test Calcio/, body)
    recipient.reload
    assert_match(%r{/t/o/#{Regexp.escape(recipient.tracking_token)}\.gif}, body)
    assert_equal 1, email.attachments.size
    assert_equal "brochure.pdf", email.attachments.first.filename
  end

  test "inlines active storage images as cid attachments" do
    png = Base64.decode64("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==")
    blob = ActiveStorage::Blob.create_and_upload!(io: StringIO.new(png), filename: "pixel.png", content_type: "image/png")
    src = Rails.application.routes.url_helpers.rails_blob_path(blob, only_path: true)
    mailing = create_mailing(body_html: %(<p>Foto</p><figure><img src="#{src}" width="240" height="120"></figure>))
    mailing.rebuild_recipients!
    recipient = mailing.mailing_recipients.first

    email = CampaignMailer.outreach(recipient, html: recipient.rendered_html, subject: "Foto")
    email.deliver_now

    assert email.attachments.any? { |att| att.filename.to_s.include?("pixel.png") }
    body = (email.html_part || email).body.to_s
    assert_match(/cid:/, body)
    assert_match(/width:\s*240px/, body)
    assert_no_match(/<figure/, body)
  end
end