require "test_helper"
require "base64"

class MailImagesControllerTest < ActionDispatch::IntegrationTest
  PNG = Base64.decode64("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==")

  test "admin can upload an image for the editor" do
    login_as users(:admin)
    follow_redirect! if response.redirect?

    upload = png_upload
    assert_difference -> { ActiveStorage::Blob.count }, 1 do
      post mail_images_path(project_code: "matchlivetv"), params: { file: upload }
    end
    assert_response :success
    json = JSON.parse(response.body)
    assert json["url"].present?
    assert_match(/active_storage/, json["url"])
  end

  test "rejects non image files" do
    login_as users(:admin)
    follow_redirect! if response.redirect?

    file = Tempfile.new(["note", ".txt"])
    file.write("not-an-image")
    file.rewind

    post mail_images_path(project_code: "matchlivetv"), params: {
      file: Rack::Test::UploadedFile.new(file.path, "text/plain")
    }
    assert_response :unprocessable_entity
  end

  private

  def png_upload
    file = Tempfile.new(["pixel", ".png"])
    file.binmode
    file.write(PNG)
    file.rewind
    Rack::Test::UploadedFile.new(file.path, "image/png")
  end
end