module Method = H2.Method
module Headers = H2.Headers
module Status = H2.Status

type request = {
  meth: Method.t;
  target: string;
  scheme: string;
  headers: Headers.t;
}

type response = {
  status: Status.t;
  headers: Headers.t;
  content: string;
}

let request_route request =
  match String.split_on_char '/' request.target with
  | "" :: l -> l
  | _ -> assert false

let content_type_to_string = function
  | `Text_plain -> "text/plain"
  | `Application_json -> "application/json"

let default_headers ~content typ =
  Headers.of_list
    [
      ("content-length", string_of_int (String.length content));
      ("connection", "close"); ("content-type", content_type_to_string typ);
    ]

let home_page_text =
  "Hello!\n\nThis is MTE, the MirageOS Taler Exchange unikernel."

let request_handler request =
  match request_route request with
  | [ "" ] ->
      let content = home_page_text in
      let headers = default_headers ~content `Text_plain in
      Lwt.return { status= `OK; headers; content }
  | _ ->
      let content = "Not found." in
      let headers = default_headers ~content `Text_plain in
      Lwt.return { status= `Not_found; headers; content }