import Config

# Configure Swoosh SMTP adapter to skip TLS certificate verification
# This is needed for IONOS SMTP server which has certificate key usage issues
config :asciinema, Asciinema.Emails.Mailer,
  adapter: Swoosh.Adapters.SMTP,
  relay: System.get_env("SMTP_HOST"),
  username: System.get_env("SMTP_USERNAME"),
  password: System.get_env("SMTP_PASSWORD"),
  port: System.get_env("SMTP_PORT") || 587,
  tls: :always,
  auth: :always,
  ssl: false,
  tls_options: [
    verify: :verify_none,
    versions: [:"tlsv1.2", :"tlsv1.3"]
  ]

# Custom Plug to inject theme JavaScript into HTML responses
defmodule CustomThemeInjector do
  @behaviour Plug

  def init(opts), do: opts

  def call(conn, _opts) do
    Plug.Conn.register_before_send(conn, fn conn ->
      if html_response?(conn) do
        inject_custom_script(conn)
      else
        conn
      end
    end)
  end

  defp html_response?(conn) do
    case Plug.Conn.get_resp_header(conn, "content-type") do
      [content_type | _] -> String.contains?(content_type, "text/html")
      [] -> false
    end
  end

  defp inject_custom_script(conn) do
    {status, headers, body} = Plug.Conn.sent_resp(conn)

    if is_binary(body) and String.contains?(body, "</head>") do
      script_tag = ~s(<script src="/js/custom.js"></script>\n)
      modified_body = String.replace(body, "</head>", "#{script_tag}</head>", global: false)
      %{conn | status: status, resp_headers: headers, resp_body: modified_body}
    else
      conn
    end
  end
end

#  Add the custom plug to the endpoint
config :asciinema, AsciinemaWeb.Endpoint,
  http: [plug: CustomThemeInjector]