defmodule ReverseProxy.Router do
  @moduledoc """
  This Plug routes our requests from a set of servers in
  the config file.

  It does that by reading the whole config file and reading
  the hosts and their upstreams.
  """

  use Plug.Router

  plug :match
  plug :dispatch

  for {host, upstream} <- Application.get_env(:rexy, :upstreams, []) do
    @upstream upstream
    match _, host: host do
      ReverseProxy.Service.call(conn, upstream: @upstream)
    end
  end

  #TODO: Maybe add a nice static page to be rendered instead.
  match _, do: conn |> send_resp(400, "Bad Request")
end